基于井中微地震监测方法的压裂效果评价——以延安探区YP5-1井为例  

Fracturing effect evaluation based on borehole microseismic monitoring method——Take well YP5-1 in Yan’an exploration area as an example

作　　者：李颖涛 杨国旗 冯洋 李富豪 韩伟 杨强强 刘婵 郑艳 文明 刘磊 魏强 LI Yingtao;YANG Guoqi;FENG Yang;LI Fuhao;HAN Wei;YANG Qiangqiang;LIU Chan;ZHENG Yan;WEN Ming;LIU Lei;WEI Qiang(No.1 Gas Production Plant of Oil and Gas Exploration Company of Shaanxi Yanchang Petroleum Group,Shaanxi Yan’an 716005,China)

机构地区：[1]陕西延长石油集团油气勘探公司采气一厂,陕西延安716005

出　　处：《非常规油气》2022年第6期114-120,共7页Unconventional Oil & Gas

基　　金：“十三五”国家科技重大专项“延安地区陆相页岩气勘探开发关键技术”(2017ZX05039)。

摘　　要：为了能够实时精确监测页岩气水平井水力压裂裂缝空间形态及储层改造体积,针对压裂过程中无法定量描述人工裂缝扩展形态,无法研究压裂裂缝扩展影响因素的问题,运用井中微地震监测技术,对宝塔南YP5-1井第1~第13压裂段压裂全过程进行了裂缝监测,结果表明:1)对比分析微地震事件纵横波差异,表明受储层天然裂缝发育影响,压裂裂缝出现不对称发育现象;2)人工裂缝FCL为0.32~0.71,裂缝复杂程度较高,SRV重合性较低,单层压裂裂缝重复交叉较少,表明储层改造效果比较好;3)微地震监测成果与测井显示结果密切相关,物性条件较好的压裂层段微地震事件比较多,裂缝复杂程度较高,储层改造效果更好。以上成果对分析微地震事件空间展布,研究储层物性,客观准确评价储层改造效果等具有一定指导与借鉴作用。In order to simultaneously and accurately describe the spatial distribution state of fractures formed by hydraulic fracturing in shale gas horizontal wells,aiming at the problem that it is impossible to quantitatively describe the artificial fracture propagation form and study the influencing factors of fracture propagation in the fracturing process,the in well microseismic monitoring technology was used to monitor the whole fracturing process of fracturing sections 1~13 of well YP5-1 in south Baota.The results show that:1)The comparative analysis of P-wave and S-wave differences of microseismic events shows that the fracturing fractures appear asymmetric development due to the development of natural fractures in the reservoir;2)The FCL of artificial fractures is 0.32~0.71,the fracture complexity is high,the SRV coincidence is relatively low,and the repeated intersection of single-layer fracturing fractures is less,indicating that the effect of reservoir reconstruction is relatively good;3)The results of log interpretation and microseismic monitoring are correlated,and the fractured reservoir with better physical properties has more microseismic events,higher fracture complexity,better reservoir reconstruction effect.The research results can be used to explain the spatial distribution characteristics of microseismic events,research reservoir properties,and evaluate the fracturing effect objectively and accurately.

关 键 词：宝塔南页岩气 微地震监测 压裂评价 不对称性 储层特征 压裂参数 

分 类 号：TE357[石油与天然气工程—油气田开发工程]