The Application Status and Prospect of DTS/DAS in Fracturing Monitoring of Horizontal Wells#br#

Abstract

Abstract: The fractured horizontal well technology has been widely used in unconventional reservoir development in China，but there are still many technical problems in monitoring the fracturing performance of horizontal wells. The distributed optical fiber monitoring technology has been found with rapid progress over recent years，and developed the distributed temperature/acoustic sensing（DTS/DAS）technology，which has been widely applied to the fracturing performance monitoring of unconventional oil and gas reservoirs in the United States，Canada et al.，with good application results. In this paper，the basic principles of distributed optical fiber temperature/acoustic sensing are described，and the latest applications and research progress of DTS/DAS in fracturing monitoring of horizontal wells are summarized，including fracturing fluid distribution monitoring and leakage diagnosis，artificial fracture initiation and extension monitoring，effectiveness analysis of fracturing-based well completion，and quantitative fracture parameter interpretation. Also，the current technical limitations of the DTS/DAS technology in fracturing monitoring of horizontal wells are pointed out，and the development orientation of the distributed optical fiber monitoring technology for horizontal wells is reviewed. This paper is of great significance for accelerating the application process of the distributed optical fiber monitoring technology and improving the technical level for fracturing monitoring and evaluation of horizontal wells in unconventional oil and gas reservoirs in China.

Key words: DTS/DAS, horizontal well fracturing monitoring, fracturing fluid distribution, fracture initiation diagnosis, completion effective-
ness analysis, fracture parameter interpretation

摘要： 压裂水平井技术在我国非常规油气藏开发中已有较为广泛的应用，但在水平井压裂动态监测方面仍面临许多技术难题。分布式光纤监测技术近年发展十分迅速，已形成了分布式光纤温度/声波（DTS/DAS）配套监测技术，在美国、加拿大等非常规储层压裂动态监测中已有较多应用，并取得了较好的应用效果。阐述了分布式光纤温度/声波测试的基本原理，介绍了DTS/DAS在水平井压裂监测中的最新应用及研究进展，这些应用包括压裂液注入分布监测及漏失诊断、人工裂缝起裂及延伸监测、压裂完井有效性分析和裂缝参数定量解释，指出了 DTS/DAS技术在水平井压裂监测中目前存在的不足，并对水平井分布式光纤监测技术的发展趋势进行了分析。对于加速分布式光纤监测技术在我国非常规油气藏开发中的应用进程、提高我国水平井压裂监测和压裂效果评价技术水平具有重要意义。

关键词: DTS/DAS, 水平井压裂监测, 压裂液分布, 裂缝起裂诊断, 完井有效性分析, 裂缝参数解释

CLC Number:

TE33

LI Haitao, LUO Hongwen, XIANG Yuxing, AN Shujie, LI Ying, JIANG Beibei, XIE Bin, XIN Ye. The Application Status and Prospect of DTS/DAS in Fracturing Monitoring of Horizontal Wells#br#[J]. Xinjiang Oil & Gas, 2021, 17(4): 62-73.

李海涛, 罗红文, 向雨行, 安树杰, 李颖, 蒋贝贝, 谢斌, 辛野. DTS/DAS技术在水平井压裂监测中的应用现状与展望[J]. 新疆石油天然气, 2021, 17(4): 62-73.

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