基于停泵压力数据的压裂效果评价方法  

A novel fracturing effect evaluation method based on pump-off pressure data

作　　者：曾波 周峰 阳星 周小金 黄永智 宋毅 ZENG Bo;ZHOU Feng;YANG Xing;ZHOU Xiaojin;HUANG Yongzhi;SONG Yi(Shale Gas Research Institute of PetroChina Southwest Oil and Gasfield Company,Chengdu Sichuan 610056,China;Development Division of PetroChina Southwest Oil and Gasfield Company,Chengdu Sichuan 610056,China;Engineering Technology Department of PetroChina Southwest Oil and Gasfield Company,Chengdu Sichuan 610056,China)

机构地区：[1]中国石油西南油气田公司页岩气研究院,四川成都610056 [2]中国石油西南油气田公司开发事业部,四川成都610056 [3]中国石油西南油气田公司工程技术处,四川成都610056

出　　处：《油气井测试》2023年第1期8-15,共8页Well Testing

基　　金：中国石油前瞻性基础性重大科技项目“储层改造关键技术与装备研究”课题《水平井压裂缝网分布形态监测及诊断新技术研究》(2021DJ4502)的支持。

摘　　要：为实现大规模体积压裂效果评价、提供裂缝及改造区域相关参数,在停泵压力数据反演方法的基础上,考虑大规模体积压裂造成的改造区域与非改造区域的明显差距,首次加入复合油藏来描述改造区域内的水力微裂缝,运用高压流体压缩性及渗流理论,分析压裂后停泵阶段的压力数据变化,获取裂缝半长、裂缝高度、改造区域平均渗透率、改造区域面积等参数。该方法应用于四川省筠连县某多段压裂水平井,进行了第十二段和十三段的压裂效果评价,得到了合理的解释结果,为大规模体积压裂效果评价提供了技术支持。In order to evaluate the effect of large-scale volume fracturing and provide relevant parameters of fractures and reformed areas,this paper considers the obvious gap between the reformed area and the non-reformed area caused by large-scale volume fracturing.For the first time,composite reservoirs were added to describe the hydraulic micro-fractures in the stimulation area.Using the theory of high pressure fluid compressibility and percolation,the pressure data change in the pump stopping stage after fracturing can be analyzed,which can provide parameters such as fracture half length,fracture height,average permeability in the reconstruction area,and the area of the reconstruction area.Finally,the pump-stop pressure data inversion method proposed in this paper is applied to a multi-stage fracturing horizontal well in Junlian County,Sichuan Province,China.The fracturing effect of the twelfth and thirteenth stages is evaluated,and the results are reasonable.This results indicate that the method proposed in this paper plays an important role in the field of large-scale volume fracturing effect evaluation.

关 键 词：水平井多级压裂 压裂效果评价 停泵压力数据反演 理论压力解 复合油藏 SRV区域 裂缝半长 现场应用 

分 类 号：TE357[石油与天然气工程—油气田开发工程]