Performance and Displacement Effect Evaluation of Multifunctional Fracturing-Enhanced Oil Recovery Materials

doi:10.12388/j.issn.1673-2677.2024.03.009

Abstract

Abstract:

Poor pore-permeability，high shale oil viscosity，strong reservoir-wellbore flow risk，low primary recovery and single unsuitable slickwater fracturing fluids are the problems facing the development of Jimusar shale oil. SDY-1+XC-4，a multifunctional slickwater fracturing fluid system，was developed based on SDY-1，a multifunctional fracturing-enhanced oil recovery (EOR) material for viscosity reduction，oil washing，and imbibition. The performances of temperature and shear resistant，viscosity reduction，oil washing and imbibition were evaluated through laboratory experiments. Its applicability under reservoir temperature and salinity was analyzed. And the slickwater system has been applied in Jimsar. Results showed that SDY-1 has high compatibility with XC-4. SDY-1+XC-4 exhibits good temperature and shear resistance at reservoir temperature. At 30 ℃，the viscosity reduction rate of SDY-1+XC-4 is 93.68%，the oil washing efficiency is 66.7%，and the imbibition recovery rate is 33.24%. SDY-1+XC-4 works well under the reservoir temperature and salinity. The field testing results showed that the test well presents cumulative oil increase of 2 031.6 t，compared with the reference well. The development and application of the multifunctional fracturing-EOR materials can provide a solid foundation and technical support for the efficient development of Jimsar shale oil.

Key words:

shale oil, fracturing, enhanced oil recovery（EOR）, Jimsar, integration of fracturing and EOR

摘要：

摘要：吉木萨尔页岩油藏孔渗条件差，页岩油黏度大，水平井压裂开发过程中油藏-井筒流动保障风险较高，一次采收率低，存在滑溜水压裂液功能单一不适用的问题。以降黏-洗油-渗吸多功能压裂-提高采收率（EOR）材料SDY-1为基础研制了多功能滑溜水压裂液体系SDY-1+XC-4，通过室内实验评价其耐温耐剪切、降黏、洗油、渗吸性能，分析了其在储层温度、矿化度下的适用性，并在吉木萨尔现场应用。室内评价实验表明，SDY-1与现场滑溜水XC-4具有良好的配伍性，两者建立的多功能滑溜水压裂液体系在储层温度下具有良好的耐温耐剪切性能。30 ℃下SDY-1+XC-4降黏率93.68%，洗油效率66.7%，渗吸采收率33.24%。在储层温度、矿化度条件下，SDY-1+XC-4仍保持良好的性能。现场试验结果显示，试验井较对比井累增油2 031.6 t。多功能压裂-EOR材料的研制应用可为吉木萨尔页岩油高效开发提供坚实的技术保障。

关键词:

页岩油, 压裂, 提高采收率, 吉木萨尔, 压裂提采一体化

CLC Number:

TE39 ','1');return false;" target="_blank">
TE39

GUO Jixiang, ZHANG Xiaojun, CHU Yanjie, ZHAO Kun, PENG Zhongying.

Performance and Displacement Effect Evaluation of Multifunctional Fracturing-Enhanced Oil Recovery Materials [J]. Xinjiang Oil & Gas, 2024, 20(3): 72-82.

郭继香, 张小军, 褚艳杰, 赵坤, 彭中樱.

多功能压裂-提高采收率材料性能及驱替效果评价 [J]. 新疆石油天然气, 2024, 20(3): 72-82.

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Performance and Displacement Effect Evaluation of Multifunctional Fracturing-Enhanced Oil Recovery Materials

多功能压裂-提高采收率材料性能及驱替效果评价

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