微地震监测技术在页岩气开发过程中的应用——以四川泸州地区为例  

The Application of Micro-Seismic Monitoring in Shale Gas Development:A Case Study of Luzhou,Sichuan Province

作　　者：宋慧娟 李硕 李云迪 牟川 SONG Hui-juan;LI Shuo;LI Yun-di;MU Chuan(Jianghan Branch of Sinopec Geophysical Corporation,Wuhan 430000,China;Southern Sichuan Gas District of Petrol China Southwest Oil&Gasfield Company(SWOG),Luzhou 646000,China)

机构地区：[1]中石化石油工程地球物理有限公司江汉分公司,湖北武汉430000 [2]西南油气田公司蜀南气矿,四川泸州646000

出　　处：《东华理工大学学报（自然科学版）》2022年第5期437-442,共6页Journal of East China University of Technology(Natural Science)

基　　金：国家自然科学基金青年项目“基于快速字典学习约束的无串扰震源编码全波形反演方法研究”(41904103)。

摘　　要：运用水力压裂有效提高储层渗透率已经成为页岩气开发过程中必不可少的环节。根据压裂缝网的展布特征调整压裂参数,可达到规避压裂风险、提高储层改造效果的目的,因此实时获取缝网展布信息至关重要。微地震监测技术通过接收压裂过程中岩石破裂产生的震动,实现对压裂缝网发育过程的描述,是一种全面评价压裂效果的手段。采用地面微地震监测方法对泸州地区4口井的压裂过程进行了监测,获取压裂缝网展布范围、延伸方向等几何参数,为压裂工艺实时调整提供了有效指导,获得了较好的应用效果。通过微地震事件与目的层地球物理参数的对比,分析了天然裂缝活动特征及其对压裂缝网发育的影响,为本工区后期压裂工艺改进提供了有效参考。Hydraulic fracturing technology can effectively improve reservoir permeability.It has become an essential step in shale gas development.According to the real-time fracture network,we can adjust the key parameters to avoid fracturing risks and improve fracturing effect.Therefore,it is of great importance to obtain the information of fracture network in real-time.Microseismic monitering technology can describe the development of fracture network by receiving the microseismic waves generated by rock rupture.It is a comprehensive method to evaluate effects of fracturing.In this study,four wells of one group in Luzhou were monitored using the surface monitoring system.Geometric parameters such as the spread range and extension direction of the fracture network were obtained,which provided effective guidance for the real-time adjustment of the fracturing process and got effective application results.Through the comparison of micro-seismic events with the geophysical parameters of the destination layer,the natural crack activity characteristics and their influence on the development of the fracture network were analyzed,which provided an effective reference for the improvement of the fracturing process in the later stage of the work area.

关 键 词：页岩气藏 水力压裂 地面微地震监测 实时处理 压裂效果 

分 类 号：P631.4[天文地球—地质矿产勘探]