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Research Progress on Capture of CO2 by Alcohol Amine Absorption Method YANG Tianmeng, YANG Fan, REZEY Rehemtuli, GOU Guolei, LI Xiuhui, HOU Junwei Xinjiang Oil & Gas    2024, 20 (1): 52-60.   DOI: 10.12388/j.issn.1673-2677.2024.01.007 Abstract （279）      PDF （3625KB）（314）       Knowledge map    Save CO2 capture，utilization，and storage are the main technologies to cope with the greenhouse climate，achieve the strategic goal of carbon peak and neutralization，lead the transformation and upgrading of the global energy system，and promote the green and sustainable development of energy. The chemical absorption methods have the characteristics of high absorption efficiency and large processing capacity，most suitable for large-scale carbon capture in various industries. Among them，the alcoho lamine method is the most widely used and the most effective. After absorbing CO2，the alcoholamine solution becomes an alcoholamine-rich solution，which can be recovered by desorption treatment for cyclic utilization. However，in the process of CO2 capture by the existing alkanolamine absorbent，there are some disadvantages such as high energy consumption and great loss of absorbent，and it is necessary to improve the alcoholamine absorber to realize high absorption efficiency and a feasible process with low regeneration energy consumption. To solve the problems of large loss of absorbent and low regeneration rate，a new mixed alcoholamine absorber was developed for improvement. For the problem of high energy consumption for regeneration，the traditional thermal desorption process is improved and microwave desorption technology is selected. This paper introduces the mechanism and characteristics of CO2 absorption by alcoho lamine method，summarizes the basis for improving the mixed alcoholamine absorber，and expounds on the principle and characteristics of CO2 capture through microwave-assisted alcoholamine，providing a reference for industrial carbon capture and environmental protection. Reference | Related Articles | Metrics

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Research Progress on the Mechanisms and Control Methods of Casing Deformation in Shale Gas Horizontal Wells#br# YIN Aobo , LI Jun, , LIAN Wei , ZHANG Hui Xinjiang Oil & Gas    2025, 21 (1): 50-60.   DOI: 10.12388/j.issn.1673-2677.2025.01.006 Abstract （33）      PDF （3254KB）（131）       Knowledge map    Save Significant casing deformation （CD） occurs during multi-stage fracturing of shale gas horizontal wells，which reduces the ratio of recovered reservoirs and increases operation costs. Based on a comprehensive review of global research on this issue，a comparative analysis of the current status of casing deformation in shale gas horizontal wells was conducted. With the casing deformation data from Changning-Weiyuan，Luzhou，and Weirong blocks，the distribution patterns of casing deformation in terms of time，space，and morphology were summarized. The influences of engineering factors such as casing and cement sheath types，cementing quality，fracturing and perforation parameters，and thermal stresses，as well as geological factors such as reservoir heterogeneity and reservoir slip，on casing deformation，were analyzed. The analysis results indicate that while engineering factors can increase casing stresses，they are unlikely to cause casing deformation. Among geological factors，reservoir slip induced by natural fractures and faults activated during multi-stage fracturing is the main controlling factor leading to significant casing deformation. To address this issue，various control methods were summarized，including optimizing casing and cement sheath parameters，improving cementing quality，selecting appropriate fracturing and perforation parameters，optimizing wellbore trajectory，and controlling reservoir slip. Additionally，it was proposed to enhance the understanding of formations and improve prediction accuracy of reservoir slip. The research findings provide references for casing integrity design and control during the fracturing process. Reference | Related Articles | Metrics

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GYPSUM MUDSTONE CAPROCK OF EOGENE SYSTEM AND ITS SEAL TO GAS IN KUCHE DEPRESSION Xinjiang Oil & Gas    2005, 1 (1): 6-11.   Abstract （15）      PDF （109KB）（33）       Knowledge map    Save Related Articles | Metrics

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Applications and Prospect of DeepSeek Large Language Model in Petroleum Engineering TIAN Huiyang, LIU Ruiheng, LI Dongshuang, YOU Shaohua, LIAO Qinzhuo, TIAN Shouceng Xinjiang Oil & Gas    2025, 21 (2): 55-.   DOI: 10.12388/j.issn.1673-2677.2025.02.006 Abstract （30）      PDF （3419KB）（12）       Knowledge map    Save The emergence of large language models（LLM） with characteristics of general artificial intelligence has ushered in a milestone technological revolution across industries，offering new opportunities for the intelligent transformation of petroleum engineering. This paper explores the application prospect，challenges，and development recommendations for LLM，represented by DeepSeek，in petroleum engineering. First，the fundamental concepts and technical features of LLM are introduced. Subsequently，potential application scenarios in petroleum engineering are examined，including user interaction and Q&A systems，data governance and information integration，data analysis and decision support，information parsing and intelligent assistance，and environmental monitoring and safety management. Concurrently，limitations and challenges in applying LLM to petroleum engineering are identified，such as insufficient knowledge updating capabilities，difficulties in comprehending domain-specific expertise，limited innovation in scientific research，and high training costs. Finally，recommendations and future directions for leveraging LLM in petroleum engineering are proposed，including developing specialized LLMs tailored for petroleum engineering，constructing petroleum-domain databases and information extraction frameworks，integrating internet-enabled search and real-time updating functionalities，and advancing image processing and video generation technologies. This study systematically outlines an implementation framework for LLM in petroleum engineering，providing theoretical guidance and practical references for the industry’s intelligent evolution. Reference | Related Articles | Metrics

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Xinjiang Oil & Gas    2016, 12 (1): 19-24.   Abstract （9）      PDF （2728KB）（35）       Knowledge map    Save Related Articles | Metrics

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Xinjiang Oil & Gas    2016, 12 (1): 60-66.   Abstract （7）      PDF （1356KB）（20）       Knowledge map    Save Related Articles | Metrics

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Research Status and Prospect of Deep and Ultra-deep Drilling Technology SUN Jinsheng, , YANG Jingbin , LV Kaihe , BAI Yingrui , LIU Jingping , HUANG Xianbin Xinjiang Oil & Gas    2025, 21 (2): 1-14.   DOI: 10.12388/j.issn.1673-2677.2025.02.001 Abstract （26）      PDF （7345KB）（11）       Knowledge map    Save This paper systematically discusses the research progress of the deep and ultra-deep drilling technology in both China and other countries，analyzes the challenges faced by the deep and ultra-deep drilling technology，and points out the future development direction. With the exploitation of hydrocarbon resources shifting toward deep and ultra-deep formations，drilling technology faces many challenges，such as high temperature and high pressure （HTHP），complex geological structure，and wellbore instability. In recent years，significant progress has been made in the casing program optimization，ultra-deep drilling rig equipment，drilling fluid technology，etc.，but there are still vital problems，such as HTHP tolerance，wellbore instability and severe lost circulation. The future development of the casing program optimization technology is oriented toward intelligence and refinement to improve the risk warning accuracy and the dynamic adjustment ability of the casing program design. The rig equipment and key tools will focus on automation and intelligent upgrading to improve their tolerance of temperature and pressure and reliability. The drilling fluid technology needs to be further studied in terms of water- and oil- based drilling fluid systems tolerant of high temperature and high salinity and lost circulation control and plugging. These technological breakthroughs are expected to provide solid support for the efficient development of deep oil and gas resources. Reference | Related Articles | Metrics

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Research and Application Status of Plugging Materials for Drilling Fluid QIAO Mu, , ZHU Zhongxi, , YAN Kangkai, Xinjiang Oil & Gas    2025, 21 (1): 10-23.   DOI: 10.12388/j.issn.1673-2677.2025.01.002 Abstract （37）      PDF （5410KB）（39）       Knowledge map    Save Lost circulation is a common and challenging downhole complex issue in current drilling operations. It has become one of the major factors affecting drilling speed and may lead to safety incidents of different levels. By comprehensively analyzing the types and mechanisms of lost circulation，the performances of global novel plugging materials under different operating conditions，and their interactions with factors such as the wellbore and formations，this study elucidates the characteristics and mechanisms of cement，cross-linking system and metallic plugging materials，granular and fiber lost circulation materials （LCMs），and the combination of curable materials and LCMs. The application performances and pros and cons of different types of LCMs for lost circulation in various formations are summarized. The results indicate that given both the treatment success rate and cost-effectiveness，cement plugging materials are preferred for handling fluid loss caused by the highly permeable rock matrix，with a treatment success rate of 91%. To address the karst-cavern thief zone，curable materials with LCMs are relatively favored，delivering a treatment success rate of 89%. Fiber LCMs are preferred for treating natural fracture-type lost circulation，with a treatment success rate of 75%. When dealing with the induced fracture-type lost circulation，granular LCMs are favorable，with a treatment success rate of 92%. The findings of this research are of important theoretical and technical guiding significance for enhancing the plugging performance of drilling fluids and promoting the development of lost circulation plugging technology. Reference | Related Articles | Metrics

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Research Progress on Mechanical Composite Piping Technology for Oil and Gas Field Gathering and Transportation#br# ZENG Dezhi , SHI Shengyao , LI Yiyang , SUN Jianghe , SU Rigu , CHEN Siyu Xinjiang Oil & Gas    2025, 21 (1): 87-94.   DOI: 10.12388/j.issn.1673-2677.2025.01.010 Abstract （23）      PDF （1040KB）（23）       Knowledge map    Save Bimetallic composite piping technology is an important method to solve the internal corrosion of pipelines of the gathering and transportation system of oil and gas fields. The forming，welding and testing are the prerequisites for safe pipeline operations. To ensure the safe production of oil and gas fields，the progress of the forming，welding and non-destructive testing （NDT） technologies of bimetallic mechanical composite piping was reviewed. Two commonly used mechanical molding methods and their characteristics were clarified，the process methods for improving the quality of welded joints were analyzed，and the NDT technologies for different pipeline defects were summarized. The results show that in terms of pipe forming，explosive forming and hydraulic forming are commonly used in China for composite piping，but they still have limitations in manufacturing large-diameter pipes and special-shaped pipe fittings；in terms of welding，the quality of welded joints can be improved by optimizing the welding process，and the laser cladding technology of pipe ends has become a future research direction；in terms of the NDT，traditional testing methods are gradually developing towards intelligent and integrated modern technologies，delivering a wider coverage and higher defect detection rates. In addition，if the pipe end measurements at key steps of the full life cycle of mechanical composite piping are recorded，accurate traceability can be achieved once quality problems occur. It is concluded that improving the quality control of mechanical composite piping technology during the forming and welding processes and the accuracy of the NDT technologies is of great significance for their applications in oil and gas field gathering and transportation. Reference | Related Articles | Metrics

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Research Progress on Early Warning Technology of Drilling Complex Accidents LIU Yingbiao, , XU Shengjiang, , TIAN Long, , ZHONG Yinming, , BAI Jiashuai, , ZHONG Runhao, Xinjiang Oil & Gas    2025, 21 (2): 15-23.   DOI: 10.12388/j.issn.1673-2677.2025.02.002 Abstract （25）      PDF （636KB）（9）       Knowledge map    Save Complex accidents in drilling operations，such as lost circulation，pipe sticking，and well kick，bring about severe threats to drilling safety and significantly increase economic costs. Therefore，the petroleum industry is driven to actively seek efficient preventive measures. With the rapid development of big data and artificial intelligence technologies，developing an early warning system for drilling complex accidents has become a core technical challenge in drilling engineering. This study conducts an in-depth exploration of the early warning technologies for drilling complex accidents，including lost circulation，sticking，and well kick. It systematically compares the characteristic parameters，accuracy，and application performances of various algorithm models and reveals the differenc es and advantages/disadvantages of different models in terms of early warning capabilities. It is found that in scenarios where the demand for characteristic parameters is low and the data sources are stable，machine learning algorithm models exhibit superior accuracy and timeliness in the early warning of drilling complex accidents. However，when faced with challenges such as high computational complexity，poor data quality，and unstable data sources，especially in predicting lost circulation during drilling and early-warning complex well kick accidents，the models suffer from high rates of false alarms and frequent missed alarms，and few field application cases are reported. To promote the field application of drilling complex accident early warning techniques and drilling digitalization，it is necessary to strengthen research on data quality improvement and algorithm optimization. Despite the numerous challenges，big data and artificial intelligence still open up broad prospects for early warning technologies. Reference | Related Articles | Metrics

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Research on Oil Stabilization and Water Control Performance of Relative Permeability Regulator Grafted Proppant#br# ZHANG Wei, , WEN Xuejun , PU Di , LUO Pingya , GUO Yongjun, , XIONG Qiyong Xinjiang Oil & Gas    2025, 21 (1): 69-77.   DOI: 10.12388/j.issn.1673-2677.2025.01.008 Abstract （30）      PDF （1987KB）（26）       Knowledge map    Save In a certain area of Karamay Oilfield，numerous production wells suffer from rapid water cut rise and high water cut after fracturing treatments. To solve this problem，the proppant grafted with the hydrophobic association relative permeability regulator，RPM-SiO2，was developed by grafting the hydrophobic association relative permeability regulator onto the quartz sand surface，with the help of silane coupling agents KH570. The grafting of relative permeability regulators onto the proppant surface was confirmed successful by infrared spectroscopy and electron scanning microscopy （SEM）. Under the reservoir conditions of the study area of Karamay Oilfield，the differences of conventional performance （wettability，density，acid solubility and compressive strength），fracture conductivity，and water control ability between RPM-SiO2 and blank quartz sand proppants were investigated. The results show that the comprehensive performances of RPM-SiO2 and quartz sands are basically consistent，both meeting the requirements of the industrial standard. The resultant oil phase fracture conductivities are consistent，but the water phase fracture conductivity of RPM-SiO2 is 25% lower than that of quartz sands. Compared with quartz sands，RPM-SiO2 presents a decrease of 83.41% in the water phase permeability，17.49% in the oil phse permeability，and 18.65% in the water cut of produced liquid. RPM-SiO2 has high water control capability and long-term effectiveness. Reference | Related Articles | Metrics

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Development and Performance Evaluation of a High-Efficiency Asphalt Dispersant ZHENG Cunchuan , WANG Wei , CHEN Shengen , WANG Rui , CHEN Jiangdong Xinjiang Oil & Gas    2025, 21 (1): 78-86.   DOI: 10.12388/j.issn.1673-2677.2025.01.009 Abstract （22）      PDF （3158KB）（19）       Knowledge map    Save In order to solve the problem of severe blockage caused by the gradual precipitation，aggregation and settlement of asphaltenes with the decreasing temperature during the artificial lifting process in Tahe Oilfield，a high-efficiency asphalt dispersant was developed and evaluated via the steel wire mesh dissolution method. Through the characterization analysis of the wellbore sediments by three-component solvent fractionation，elemental composition determination and scanning electron microscopy （SEM），asphaltenes were determined to be the main component of Tahe wellbore sediments. According to the principle of similar mutual solubility ，a dispersant LYH-1 （aromatic solvent LY + 1.0% n-pentanol + 1.0% nonylphenol + 0.2% petroleum sulfonate） that could efficiently dissolve asphaltenes was developed. The asphaltene sediments were soaked in the asphalt dispersant LYH-1 in a water bath at 50°C for 4 h，and the solubility of 1 g of asphaltene sediments in 5 g of asphalt dispersant LYH-1 was as high as 97%，and the sediments did not aggregate after long-term standing，suggesting excellent stability and expanded applicability. The investigation of the working mechanism of the high-efficiency asphalt dispersant LYH-1 demonstrates that the dispersant forms a stable system with asphaltene sediments，mainly through hydrogen bonding and π-π interaction，which reduces the particle sizes of asphaltene aggregates to allow them to be stably suspended in solutions，and hinders the further flocculation and deposition of asphaltenes. The results show that LYH-1，as a novel high-performance asphalt dispersant，can effectively prevent the blockage of oil wells and surface pipelines while reducing production costs，so as to achieve the goal of production growth and improve the development efficiency of heavy oil reservoirs. Reference | Related Articles | Metrics

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Oil-Based Drilling Fluid Anti-Collapse Technology for Long Openhole Wellbore of Jimsar Shale Oil#br# WU Yicheng, LIU Peng, CAO Qingtian, CHANG Huipan, LI Shuai, ZHANG Bin Xinjiang Oil & Gas    2025, 21 (1): 32-40.   DOI: 10.12388/j.issn.1673-2677.2025.01.004 Abstract （34）      PDF （5446KB）（29）       Knowledge map    Save The horizontal well of Jimsar shale oil with a long openhole wellbore adopts the two-casing-section structure，and the openhole wellbore of the second casing section is 4 000 m long，with a horizontal wellbore over 2 000 m. The used drilling fluids are oil-based，and wellbore collapse tends to occur when drilling the Badaowan and Jiucaiyuanzi Formations and leads to movement resistance，sticking of tools，lost circulation，etc. To overcome the wellbore collapse in complex formations，in accordance with the lithological characteristics of formations，the main factors affecting wellbore stability such as clay mineral composition and micro-fracture development were analyzed，the mechanisms of wellbore instability of such collapse-prone formations were clarified，and the anti-collapse theory of oil-based drilling fluids was developed，which features "multi-element cooperation and broad-spectrum plugging". Based on the proposed theory，the anti-collapse formulation of oil-based drilling fluids was improved by optimizing the materials such as asphalt products，ultra-fine calcium carbonates and nano-plugging agents. The laboratory tests show that the performance parameters of the drilling fluids meet the operation requirements and the plugging performance is excellent. Specifically，the drilling fluid density is 1.52-1.62 g/cm3；funnel viscosity，80-100 s；yield point，8-13 Pa；emulsion-breaking voltage，above 500 V；oil-water ratio，（80：20） to （85：15）；API fluid loss，≤ 1.5 mL；HTHP fluid loss at 120°C，≤ 2 mL. The presented anti-collapse system of oil-based drilling fluids has been successfully applied to Jimsar shale oil horizontal wells with a long openhole wellbore. The average borehole enlargement rate of the openhole wellbore and the rate of downhole complex issues were 3.03% and 0.55% respectively. The anti-collapse system effectively ensured the drilling safety of the build-up and horizontal wellbores. Reference | Related Articles | Metrics

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Xinjiang Oil & Gas    2013, 9 (1): 17-22.   Abstract （8）      PDF （2233KB）（12）       Knowledge map    Save Related Articles | Metrics

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Intelligent Diagnosis and Analysis of Stuck Pipe Based on Supervised and Unsupervised Algorithms SONG Xianzhi, , WANG Yiwei , YANG Yanlong , LIU Muchen , ZHU Zhaopeng, Xinjiang Oil & Gas    2025, 21 (2): 24-34.   DOI: 10.12388/j.issn.1673-2677.2025.02.003 Abstract （19）      PDF （3087KB）（5）       Knowledge map    Save In drilling engineering，stuck pipe，as one of the common downhole complex issues，seriously affects drilling efficiency. Stuck pipe monitoring is crucial for ensuring the safety and efficiency of drilling operations. With the rapid development of artificial intelligence technology in recent years，new approaches have emerged for stuck pipe monitoring. However，the existing research on intelligent stuck pipe monitoring mainly focuses on the optimization and application of single unsupervised or supervised algorithm，leaving a gap of systematic comparative studies on these two types of algorithms with respect to stuck pipe monitoring. This study selects multi-dimensional drilling parameters such as bit position，hook height，and torque of ratary table as the study targets，according to distance correlation coefficients，constructs a comparative evaluation system involving classic unsupervised algorithms （AE，K-means，DBSCAN） and supervised algorithms （SVM，RF，LSTM），and analyzes the performance of these algorithms in estimating stuck pipe trends. The results show that compared with supervised algorithm，unsupervised algorithm delivers a increase of 12.5% in monitoring average accuracy and reductions of 37.1% and 27.6% in average false and missed alarm rates respectively. Unsupervised algorithm demonstrates greater advantages in cases of small sample sizes and absence of mechanistic constraints. The findings of this research provide references for model selection and optimization in intelligent stuck pipe monitoring for drilling engineering and promote the practical application of unsupervised algorithm in stuck pipe risk monitoring. Reference | Related Articles | Metrics

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Optimization Algorithm for Trajectory Design of Double-Step Horizontal Wellbore DING Jianxin , WANG Junshan , WANG Xiao , WANG Haitao , Qin Ji , LI Hui , LU Gang Xinjiang Oil & Gas    2025, 21 (2): 91-.   DOI: 10.12388/j.issn.1673-2677.2025.02.010 Abstract （14）      PDF （589KB）（5）       Knowledge map    Save Given that the conventional five-arc trajectory design of the double-step horizontal wellbore may have no feasible solution in the case of limited horizontal section spacing，this study proposed a wellbore trajectory design method based on constrained optimization. By establishing a constrained optimization model to minimize the horizontal section length，an efficient solving algorithm was constructed，which combines the quasi-analytic solution and the bisection method. Given the failure problem that the singularity polynomial of the proposed quasi-analytic solution is always zero when the inclination and azimuth angles of the two horizontal sections are the same，a modified analytical calculation formula was proposed to deal with this theoretical defect of the traditional method. Compared with the traditional iterative method，the proposed method reduces the computational complexity to the order of solving quadratic equations via the characteristic polynomial dimension reduction strategy. Examples showed that this method can converge rapidly in cases of three-dimensional stepped wells，two-dimensional wells and simplified cases. By optimizing the adjustment of the horizontal section through the bisection method，the control of the minimum trajectory length under the constraint of wellbore curvature was achieved. This method can effectively deal with the trajectory design in cases of narrow spacing，like fault-separated reservoirs，and provide theoretical support for the development of drilling software. The research findings significantly improve the reliability and engineering applicability of the trajectory design for stepped horizontal wells. Reference | Related Articles | Metrics

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Research Progress and Development Direction of Hydrofracturing Design Models ZHANG Shicheng, CHEN Ming, MA Xinfang, ZOU Yushi, GUO Tiankui Xinjiang Oil & Gas    2021, 17 (3): 67-73.   Abstract （429）      PDF （2607KB）（299）       Knowledge map    Save Hydrofracturing model is the basis of hydrofracturing design,and also the crux where current bottlenecking problems lie. In order to promote the development of fracturing design models and softwares in China,fracture propagation models,numerical methods and popular commercial softwares for hydrofracturing are systematically analyzed,and their future development orientations are predicted. Research findings show that (1) Planar and complex fracture models are different in application conditions and accuracy. Most commercial softwares are planar fracture models-based,and most complex fracture models are pseudo-three-dimensional ones. (2) It is the focus of fracturing design softwares to develop models with satisfactory accuracy and efficiency. (3) Artificial intelligence data-driven fracture analysis,and fracture parameter inversion based on micro-seismic and fiber optic logging are the development orientation of fracturing design models. Reference | Related Articles | Metrics

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Numerical Simulation of Fracture Propagation Pattern in the Presence of Gravel WANG Tao, CHENG Leiming, XIANG Yuankai, CHENG Ning, WANG Bo, ZHOU Hang Xinjiang Oil & Gas    2023, 19 (1): 42-48.   DOI: 10.12388/j.issn.1673-2677.2023.01.007 Abstract （104）      PDF （4977KB）（52）       Knowledge map    Save Large-scale hydraulic fracturing is the essential technology for cost-effective and efficient development of tight sandy conglomerate reservoirs. Gravel parameters are considered the key factors that influence the hydraulic fracture geometry. The existence of gravels can make it even harder to complete fracturing stimulation. The complex fracture geometry，high tortuosity，and shorter supporting fracture length make it difficult to achieve the designed fracture conductivity. In this research，the continuous-discontinuous element method （CDEM） was applied to establish a 2D full fluid-solid coupling fracture propagation model to explore the influence of stress difference，gravel content，and flow rate on the fracture propagation geometry. The numerical simulation results show that：the multi-phase media hydraulic fracturing model based on the CDEM method can accurately simulate the overall fracture propagation geometry under the influence of gravel；the fractures will divert and generate a tortuous fracture when meeting high strength gravel；in reservoirs with high stress，hydraulic fractures tend to pass around the gravel and then divert to the direction of the maximum horizontal principal stress；in the presence of gravel，the fracture propagation will shape a high-pressure zone and generate more micro-fractures，thus increasing the stimulated reservoir volume. This study lays a theoretical basis for optimization of the fracturing design of conglomerate reservoirs. Reference | Related Articles | Metrics

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Advances in Study on Rheology Modifier for Water-Based Drilling Fluids SUN Jinsheng, , YANG Jie, , RONG Kesheng , WANG Ren, , QU Yuanzhi, , LIU Fan, Xinjiang Oil & Gas    2023, 19 (2): 1-16.   DOI: 10.12388/j.issn.1673-2677.2023.02.001 Abstract （134）      PDF （7116KB）（82）       Knowledge map    Save The global oil and gas exploration is gradually moving from shallow layer to deep layer，conventional hydrocarbon resources to unconventional hydrocarbon resources，medium and high-permeability to low-permeability and low-grade，and shallow seas to deep seas. With the increasing drilling workload，fit-for-purpose drilling fluid technology is needed to provide support for high-performance drilling. High-performance drilling fluids are the key to safe，efficient，economical，and green drilling，and the drilling fluid rheology is the core parameter for evaluating the performance of the drilling fluid system. As an essential treatment agent for building the drilling fluid systems，rheology modifiers can enhance viscosity and shear，improve the yield point-plastic viscosity ratio and optimize shear thinning，so as to control the rheology of drilling fluids. In order to drive the research and development of new rheology modifiers for drilling fluids，this paper investigates and classifies the rheology modifiers for water-based drilling fluids at home and abroad，and summarizes the research results，application，and existing problems of various rheology modifiers. The future direction of rheology modifiers for water-based drilling fluid was also analyzed to facilitate the technical improvement of water-based drilling fluids. Reference | Related Articles | Metrics

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Research Status and Development Proposal of ROP Improvement Technology with Percussion Rock-Breaking Method LI Gensheng, MU Zongjie, TIAN Shouceng, HUANG Zhongwei, SUN Zhaowei Xinjiang Oil & Gas    2024, 20 (1): 1-12.   DOI: 10.12388/j.issn.1673-2677.2024.01.001 Abstract （170）      PDF （7836KB）（182）       Knowledge map    Save Enhancing the rate of penetration （ROP） is crucial for optimizing the efficiency of oil and gas development and deep exploration in China and ensuring national energy security. The percussion rock-breaking drilling technology has been applied in oil fields at home and abroad，resulting in significant improvements in ROP. Further research efforts are expected to address the technical challenges of low drilling footage and limited ROP enhancements encountered during deep exploration of hard rock formations with high temperature and pressure. This paper presents and analyzes the practice and development trends of the drill bit percussion rock-breaking drilling technology assisted by axial percussion，torsional percussion，and axial-torsional coupled percussion. It illustrates that the percussion-assisted drill bit rock-breaking mechanism is the core of percussion rock-breaking ROP improvement technology. This paper also reviews the scientific advancements made by domestic and overseas research scholars in physical experiments，theoretical modeling，and numerical simulation of percussion-assisted drill bit rock-breaking. In addition，it offers relevant proposals for the development of percussion rock-breaking ROP improvement technology，i.e. advancing research on material structure optimization design，intelligent control，integration of multiple technologies，and optimization of well applications. This is expected to provide valuable insights for enhancing the drilling efficiency in energy development of our country. Reference | Related Articles | Metrics

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Applicability Evaluation of Tight Oil Reservoir Gas Channeling and Sweep Control System LI Junjian, XI Yilin, ZHANG Miao, ZANG Chuanzhen Xinjiang Oil & Gas    2024, 20 (1): 68-76.   DOI: 10.12388/j.issn.1673-2677.2024.01.009 Abstract （87）      PDF （1953KB）（37）       Knowledge map    Save Tight oil reservoirs are widely distributed in China，with a large proportion of reserves and great development potential. These reservoirs have low matrix permeability and porosity，with fractures acting as main oil and gas flow channels，and gas injection is often used to recover such reservoirs. However，due to the cross-scale development of reservoir fractures and the influence of reservoir heterogeneity and viscous fingering，the technology of gas injection to improve oil recovery has limits. Gas channeling can easily occur in the presence of fractures and high permeability bands，causing many issues related to the energy supplement of formation. In this paper，foam and CO2-responsive gel were selected to prepare the gas channeling and sweep control system，and their performance and applicability in tight oil reservoirs were evaluated by physical experiment simulation. Commercial numerical simulation software was used to characterize CO2 huff-n-puff and underground gelling reaction. Through the numerical simulation of a tight oil reservoir in China，it is proved that the CO2-responsive gel has an obvious stimulation effect during huff-n-puff treatment，resulting in an increase in recovery rate by 3.1%. This research validates the promising application prospects of the CO2-responsive gel system in the development of tight oil reservoirs. Reference | Related Articles | Metrics

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Status and Development Trend of Molten Salt Thermal Storage Technology Based on Photothermal Technology DUAN Shengnan, MA Nengliang, CHEN Xiangyu, DUAN Zidan, CHEN Bairong, WANG Zhiqiang Xinjiang Oil & Gas    2024, 20 (2): 87-.   DOI: 10.12388/j.issn.1673-2677.2024.02.011 Abstract （121）      PDF （1771KB）（42）       Knowledge map    Save In addressing the problems of intermittency and instability in the conventional utilization of solar energy，this paper introduces the research progress of the photothermal technology applied in photothermal power generation and direct solar thermal utilization for stable solar heat supply by employing heat storage systems，and summarizes the classification methods and application scenarios of current heat storage technologies. This study reviews the technical principles and research progress of the mainstream molten salt heat storage systems （carbonate，chloride，fluoride and nitrate），pointing out the advantages and technical problems of different molten salt thermal storage systems. Aiming at the core of the molten salt thermal storage technology，it summarizes the research status and process flow of photothermal technology in different scenarios. This paper also generalizes the development trends of molten salt thermal storage systems in the photothermal field. First，suitable heat collection modes are selected according to application scenarios，and the capacity configuration and coordination control of solar heat collection and molten salt thermal storage are optimized. Second，molten salt with lower melting points，wider liquid temperature range，and low corrosion is developed to improve the applicability of molten salt thermal storage. Third，the operation safety and stability of the molten salt energy storage system can be ensured while costs are lowered. This provides a reference for the future application and development of the molten salt thermal storage technology. Reference | Related Articles | Metrics

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Settling Plugging Technology for Severe Lost Circulation at the Salt Bottom of Tarim Piedmont Zone LIU Fengbao, YIN Da, WEI Tianxing, WU Hongyu, WANG Ziwu Xinjiang Oil & Gas    2024, 20 (4): 1-7.   DOI: 10.12388/j.issn.1673-2677.2024.04.001 Abstract （78）      PDF （990KB）（53）       Knowledge map    Save High-pressure gypsum salt beds and low-pressure clastic rock target beds are commonly developed in the piedmont zone of Tarim Basin，and the pressure difference between these two stratigraphic systems generally exceeds 20 MPa. Because of the inaccuracy of geological stratigraphic determination during drilling，it is highly likely to drill through the gypsum salt bed into the target bed and then trigger severe lost circulation. To solve the problem of severe lost circulation at the salt bottom of Tarim piedmont zone，this paper evaluates the performance parameters of plugging materials such as pressure-bearing capacity and settling velocity，identifies the optimal conditions （velocity and mass） of oil- and water- based drilling fluid （OBM and WBM） settling plugging pills respectively，and finally develops the high density large pressure difference settling plugging technology specialized for OBM and WBM，based on the known mechanism of the severe lost circulation problem （drilling induced communication between high and low pressure formations） and the principle of the "bottle plug" plugging practice. Specifically，optimal plugging pills are expected to form in the case of OBM with a oil-water ratio of 50：50 and ES of 200-300 V or WBM with 0.2% XC + 0.2% demulsifier + plugging agents. The developed settling plugging technology has been successfully tested in three wells in Tarim piedmont zone，and Well DB1302 was found with a pressure bearing capacity of 30 MPa，demonstrating excellent application performance. Reference | Related Articles | Metrics

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Application and Prospect of LiDAR Technology in Seismic Acquisition of Complex Mountainous Areas#br# XU Wenrui , WANG Liye , WEI Chencheng , QIN Xin , LIU Yiyan , PENG Xiao Xinjiang Oil & Gas    2025, 21 (1): 1-9.   DOI: 10.12388/j.issn.1673-2677.2025.01.001 Abstract （55）      PDF （12113KB）（44）       Knowledge map    Save The southern piedmont belt of Junggar Basin is rich in oil and gas resources. However，seismic exploration is faced with such problems as high implementation difficulties，low efficiency，high risks and high costs of field acquisition，due to the highly undulating surface conditions and complex underground structures. Therefore，the LiDAR technology was introduced to improve quality and efficiency in seismic acquisition. The functions of mountain excitation type division，mountain shot point pre-design，fine surface survey design，mountain vehicle navigation design and risk classification can be rapidly completed through the "far-looking" functionality of LiDAR images and high precision elevation data. With the application of this technology in mountain seismic acquisition，vibroseis has access into mountains，which effectively improves the excitation ratio of vibroseis in mountainous areas and the efficiency of field acquisition operations to improve quality and efficiency in the field. Looking ahead，it is believed that the LiDAR technology will play a greater role in seismic acquisition operations in complex mountainous areas. The high precision coordinates and elevation models of LiDAR images are expected to replace traditional measurement processes in field acquisition. The high resolution coordinates and elevations can improve the accuracy of surface modeling inversion. Rapid construction of digital outcrop models can be delivered with high definition imaging and digital elevation platforms. This technology promotes the upgrading of seismic exploration processes，the implementation of efficient exploration in mountainous areas，and data improvement for complex moutainous structures. Reference | Related Articles | Metrics

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The Diffusion Law of Salt Ions in Shale Reservoirs and Its Application in Hydraulic Fracture Network Diagnostics#br# LIU Zhenjun , ZHANG Yanjun , LIAO Wanrong , YANG Bing , YANG Liu , ZHOU Desheng Xinjiang Oil & Gas    2025, 21 (1): 41-49.   DOI: 10.12388/j.issn.1673-2677.2025.01.005 Abstract （23）      PDF （1516KB）（37）       Knowledge map    Save Shale reservoirs are characterized by low porosity，low permeability，and difficulty in exploitation，typically requiring the development approach combining long horizontal wells with large-scale volume fracturing techniques. After the fracturing fluid enters the formation，it undergoes a series of physical and chemical reactions with the reservoir，where salt ion diffusion plays a significant role. However，the existing research on the mechanism of ion diffusion and its application to diagnosing hydraulic fracture network is still imperfect. Therefore，this paper combines theoretical analysis with field cases to summarize the sources of salt ions in shale reservoirs，and the characteristics，mechanisms and influencing factors of ion diffusion，and presents an example of diagnosing hydraulic fracture network based on salt ion diffusion. The sources of salt ions in shale reservoirs include dissolved salts in the water film on the pore walls，crystallized salts from hydrocarbon generation and water expulsion，and salts produced by water-rock interactions. The characteristics of ion diffusion are similar to the imbibition process，which is divided into three stages：initial，transitional，and late diffusion. The initial ion diffusion rate is relatively high，exhibits a linear relationship on a logarithmic time scale，and follows Fick's law and the Einstein-Smoluchowski equation. The factors affecting salt ion diffusion include reservoir properties，solution properties，and other factors such as temperature and viscosity. Saltion diffusion can be used for the diagnosis of the development degree of volume fracturing fracture network. The method of diagnosing hydraulic fracture network through salt ion diffusion can provide scientific guidance for shale reservoir fracturing design and fracture network evaluation，help to deliver more accurate and effective reservoir stimulation and promote the efficient development and utilization of shale oil and gas resources. Reference | Related Articles | Metrics

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Prediction Method and Prevention Measures for Casing Deformation of Horizontal Well in Volume Fracturing#br# .Oil Production Technology Research Institute, PetroChina Xinjiang Oilfield Company, Karamay , Xinjiang, China, .Downhole Operation Company, CNPC Western Drilling Engineering Co., Ltd., Karamay , Xinjiang, China Xinjiang Oil & Gas    2025, 21 (1): 61-68.   DOI: 10.12388/j.issn.1673-2677.2025.01.007 Abstract （27）      PDF （5095KB）（30）       Knowledge map    Save Horizontal well volume fracturing has become a key technology for well completion and reservoir stimulation of tight oil reservoirs. For reservoirs with well-developed natural fractures and faults，high-intensity reservoir stimulation greatly increases the probability of artificial fracture-induced fault sliding，leading to casing deformation. To avoid hydraulic fracturing-induced fault sliding which could lead to shear deformation of casing，numerical simulation was used as a means to study the prediction method and prevention measures of casing deformation risk points. The H well group was taken as a field example in this research，and based on the integrated geological-engineering model and ant body tracking technology，the risk points of casing deformation were determined. With Mohr-Coulomb criterion and fracturing parameter optimization，the risk points of casing deformation were efficiently controlled，with effective preventive measures. The research results indicate that the integrated geological-engineering model and ant body tracking technology can effectively identify faults and natural fractures intersected by the well trajectories，and 20 risk points of casing deformation are predicted for the H well group. The threshold of fault activation sliding pressure was determined to be 70 MPa as per the Mohr-Coulomb criterion. The volume fracturing treatment of the H well group was carried out in a way following the strategy of "unaligned perforation + reduced pump rates + reduced injected water volumes"，and no casing deformation occurred during the fracturing operation process. A risk point prediction and prevention technology for casing deformation has been developed，effectively ensuring the safety of horizontal well volume fracturing opertation and improving the efficiency of reservoir stimulation，and providing technical references for the research on casing deformation prediction and prevention measures. Reference | Related Articles | Metrics

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An Intelligent Prediction Method for Drilling Stuck Risk Based on Mechanism Data Fusion ZHANG Yuqiang , YANG Yanlong , ZHANG Wenping , LIU Muchen , ZHU Zhaopeng , WANG Yiwei Xinjiang Oil & Gas    2025, 21 (2): 35-44.   DOI: 10.12388/j.issn.1673-2677.2025.02.004 Abstract （18）      PDF （3150KB）（4）       Knowledge map    Save Stuck pipe incidents significantly disrupt drilling operations and cause major economic losses. Traditional physics-based models for stuck pipe prediction and analysis are subjective with large errors，while intelligent models suffer from high false alarm rates and low interpretability. To address these issues，an unsupervised stuck pipe risk evaluation method based on fuzzy mathematics was proposed. This approach involves：1） establishing a tubular mechanics model to quantify wellbore friction characteristics；2） constructing a deep autoencoder to detect abnormal parameters through reconstruction error analysis；and 3） developing a dual-factor membership function for a comprehensive fuzzy evaluation of friction coefficient trends and reconstruction errors. This method avoids the dependence of the conventional supervised learning on labeled data，integrates the interpretability of mechanistic models with the generalization ability of data-driven models，and creates a physics-constrained intelligent risk assessment framework. Tests using real drilling data show that this model effectively identifies early signs of stuck pipe. It improves warning accuracy by 7.1%，compared to the single-parameter methods，reduces false alarms，and delivers a 30-minute-earlier alert. The proposed method provides a promising new technique for predicting downhole complex issues and possesses significant application potential. Reference | Related Articles | Metrics

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Design of New Electric Control Downhole Flow Control Valve for Intelligent Wells WANG Jinlong , ALENA Pevcheva Xinjiang Oil & Gas    2025, 21 (2): 73-.   DOI: 10.12388/j.issn.1673-2677.2025.02.008 Abstract （19）      PDF （5138KB）（4）       Knowledge map    Save The downhole monitoring system，integrated into the conventional electric control downhole flow control valve for intelligent wells in China，cannot monitor the two key parameters，namely the flow rate and water cut. Moreover，once the driving mechanism fails，the transmission screw automatically locks the sliding sleeve at the current position，making it impossible to close or fully open the sliding sleeve in a timely manner and resulting in the inability to regulate the production of the target layer or branch. In this research，a unique sliding sleeve mechanical structure with an integrated downhole parameter measurement system was designed using the selected sensors of pressure ，temperature and water-cut，flow meter，and downhole sliding sleeve displacement sensor，to solve the incapabilities of existing electrical-control downhole flow control valves in China to monitor fluid flow and water cut. A unique mechanical transmission system was designed using the scalable coupling to serve as the driving mechanism for the concentric sliding sleeve. The designed sliding sleeve integrates a force-open force-close mechanical structure，which can be moved to the fully open or fully closed position by the sliding sleeve switch tool. This eliminates the shortcomings of the mechanical structure of conventional electric control downhole flow control valves in China and provides key support for the development of the intelligent well technology in China. Reference | Related Articles | Metrics

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Xinjiang Oil & Gas    2013, 9 (3): 1-4.   Abstract （11）      PDF （2137KB）（69）       Knowledge map    Save Related Articles | Metrics

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Xinjiang Oil & Gas    2008, 4 (1): 16-19.   Abstract （27）      PDF （293KB）（10）       Knowledge map    Save Related Articles | Metrics

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APPLICATION OF RADIANT POINT IN TECHNOLOGY OF MORNITORING WATER-BEARING RATE AUTOMATICALLY IN CRUDE OIL AND STUDY ON IT Xinjiang Oil & Gas    2008, 4 (2): 77-84.   Abstract （17）      PDF （676KB）（7）       Knowledge map    Save Related Articles | Metrics

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Xinjiang Oil & Gas    2015, 11 (2): 85-87.   Abstract （12）      PDF （596KB）（15）       Knowledge map    Save Related Articles | Metrics

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Xinjiang Oil & Gas    2020, 16 (2): 88-92.   Abstract （16）      PDF （3110KB）（11）       Knowledge map    Save Related Articles | Metrics

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Xinjiang Oil & Gas    2021, 17 (2): 78-81.   Abstract （30）      PDF （2124KB）（44）       Knowledge map    Save Related Articles | Metrics

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A Machine Learning-Based Bridging Particle Size Recommendation Method for Lost Circulation Control LIU Fan, LIU Yushuang, ZHANG Zhen, LI Yongjian, LIU Ce, MA Zhihu, Xinjiang Oil & Gas    2024, 20 (1): 13-20.   DOI: 10.12388/j.issn.1673-2677.2024.01.002 Abstract （93）      PDF （3565KB）（68）       Knowledge map    Save Lost circulation is a key technical challenge in oil and gas exploration，and bridge plugging is the most commonly used method for lost circulation control. As an important parameter，the size of bridging particles directly affects the plugging. At present，the size selection mainly relies on experience，lacking a scientific and effective method. In light of this，this paper investigates a particle size recommendation method for lost circulation control based on machine learning algorithms. The basic data used for this method are well-logging，mud logging，and lost circulation control data from 126 completed wells in Kuqa piedmont area of Tarim Basin. The input layer adopts 23 main parameters screened based on the Pearson algorithm，and the output layer is in 4 bridging particle size ranges of 0-750 μm，750-1 500 μm，1 500-4 000 μm and＞4 000 μm. 10 commonly used machine learning algorithms are trained and tested to determine the accuracy of three types of datasets：well logging data，mud logging data，and combination of the former two types. It is found that the scores of each algorithm for the well logging + mud logging dataset are generally higher than those for the well logging and mud logging datasets. For the combined dataset，the support vector machine and extremely randomized trees algorithms have the highest F1 scores of above 0.9. The bridging particle size recommendation model based on the support vector machine and extremely randomized trees algorithms is validated twice on a well in Kuqa piedmont area. The predicted results of bridging particle size of the two algorithm models are consistent with the actual bridging effect in the field. This method exhibits good application prospects in the scientific optimization of bridging particle size. Reference | Related Articles | Metrics

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Applications and Exploration of Intelligence Technology for CO2 Transportation Pipelines in the Background of Carbon Peak and Carbon Neutrality#br# MA Yun , ZHAO Li Xinjiang Oil & Gas    2024, 20 (4): 87-96.   DOI: 10.12388/j.issn.1673-2677.2024.04.011 Abstract （82）      PDF （662KB）（28）       Knowledge map    Save CCUS （Carbon Capture，Utilization and Storage） is widely considered as an indispensable key technology for achieving the goals of global temperature control and China's vision of carbon neutrality，since it can effectively and significantly reduce industrial CO2 emissions. The transportation of CO2 from the source to the utilization site is a key link for achieving the technological goals of the CCUS industry. This paper mainly focuses on the pipeline transportation method and firstly outlines the development status of intelligent pipeline technology in both China and other countries. Then，the phase classification and related problems of CO2 transportation pipelines are addressed，and a problem-oriented investigation of the mechanism of deep fusion between artificial neural network models and pipeline corrosion rate prediction is presented. Moreover，the pipeline leak positioning principles and applications of distributed optical fiber，characteristic spectrum，and robot inspection technologies are clarified，and finally the development orientation of CO2 transportation pipeline intelligence is discussed. Comprehensive perception，centralized sharing，prediction and early-warning，and collaborative operation of CO2 pipeline data，driven by the business demand of CO2 transportation pipelines and delivered by pipeline transportation technology plus ICT technology，are believed to be the future trend of intelligent development of CO2 transportation pipelines，although no wide agreement has been reached yet. The findings of this research provide references for the sustained development and gradual application promotion of intelligent pipelines in the future. Reference | Related Articles | Metrics

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Hydraulic Filtrate Waste Recycling Technology for Water-Based Drilling Fluids in Longdong Oil Block#br# SHAO Bin , LUO Pingya, , LAN Jun , LIU Lu, , CHANG Junli , YANG Zhen, Xinjiang Oil & Gas    2025, 21 (1): 24-31.   DOI: 10.12388/j.issn.1673-2677.2025.01.003 Abstract （32）      PDF （2158KB）（25）       Knowledge map    Save Longdong Oil Block requires the full implementation of drilling fluid non-landing technology to promote the recycling of waste drilling fluid. In order to solve the problem that the performance of water-based drilling fluids prepared using on-site hydraulic filtrate waste cannot meet the standards and the influencing factors are not clear，the ethylene diamine tetraacetic acid（EDTA） titration，bacterial plate counting method and atomic absorption spectrometry （AAS） were used to investigate the key techniques to improve the reuse rate of hydraulic filtrate waste. The experiments show that the high content of calcium and magnesium ions，bacteria，and heavy metals are the main reasons for the poor performance of water-based drilling fluids prepared using hydraulic filtrate waste. Correspondingly，the modified coagulation and precipitation complexing agent II，polyether demulsifier JX，and flocculants ZY-I，ZY-II have been developed to perform the flocculation-precipitation-sterilization treatment together with the sterilizing agent. The resultant average removal rate of calcium and magnesium ions is 95.5%，the sterilization rates of saprophytic bacteria （TGB） and sulfate-reducing bacteria （SRB） are 96.54% and 100% respectively，and the heavy metal content is less than 2.31 μg/L. The laboratory tests of recycling of hydraulic filtrate waste and water-based drilling fluid preparation have been completed for 6 wells in Longdong Oil Block. Longdong Oil Block waste drilling fluid hydraulic filtrate recycling technology has been formed and applied in 5 wells of this block. The water-based drilling fluids prepared using the recycled hydraulic filtrate waste presents a performance in line with the drilling engineering design requirements，facilitating the smooth drilling process，effectively protecting the environment and saved water resources，demonstrating good prospects for application promotion. Reference | Related Articles | Metrics

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Research on Optimization of Drilling Investment Estimation Based on Parameter Extraction and Simulation LIU Mingyan , ZHANG Zhunxi , WANG Xintong , ZHAO Haiyan , WU Yuanyue , LIU Yongjie Xinjiang Oil & Gas    2025, 21 (2): 82-.   DOI: 10.12388/j.issn.1673-2677.2025.02.009 Abstract （17）      PDF （4465KB）（3）       Knowledge map    Save The investment estimation of a systematic drilling engineering project is an important step for oilfield enterprises to strengthen investment control and enhance operation management. The quality of investment estimation does not only decide the feasibility and profitability of the development plan，but also has an important instruction influence on the implementation and operation performance of the approved engineering plan. This paper proposed a method for extracting engineering parameters of drilling investment estimation based on the natural language processing algorithm and the Monte Carlo simulation investment prediction model. These two techniques were introduced into the petroleum engineering estimation，and it was demonstrated via modelling and case studies that all selected control factors were significant and thus effective. Based on the above，the investment estimation was carried out. Natural language processing algorithms were required for parameter extraction and processing，with an accuracy of over 90%. Meanwhile，the Monte Carlo simulation investment prediction model was used for calculation to ensure that the error between the extreme investment and the existing economic evaluation results was less than 5%. This developed method has been successfully applied to 29 production capacity building projects in 2024，identifying and warning 8 projects with excessive investment. It improves the accuracy and efficiency of engineering parameter extraction，enhances the percent of pass for the internal rate of return of petroleum drilling engineering investment estimation，and is of great help in improving the digitalization level of the petroleum engineering estimation. Reference | Related Articles | Metrics

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Xinjiang Oil & Gas    2012, 8 (4): 68-76.   Abstract （15）      PDF （492KB）（13）       Knowledge map    Save Related Articles | Metrics

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Xinjiang Oil & Gas    2013, 9 (1): 87-89.   Abstract （8）      PDF （168KB）（11）       Knowledge map    Save Related Articles | Metrics