压力恢复异常资料试井分析方法  

Well test analysis method for abnormal pressure build-up data

作　　者：李洋 柴德民 罗水发 高小明 袁鸿飞 何辉 LI Yang;CHAI Demin;LUO Shuifa;GAO Xiaoming;YUAN Hongfei;HE Hui(Sinopec Shengli Oilfield Company Reservoir Dynamic Monitoring Center,Dongying,Shandong 257000,China;Xi′an Sinoline Petroleum Science&Technology Co.,Ltd.,Xi′an,Shaanxi 710065,China)

机构地区：[1]中石化胜利油田分公司油藏动态监测中心,山东东营257000 [2]西安华线石油科技有限公司,陕西西安710065

出　　处：《油气井测试》2024年第5期1-7,共7页Well Testing

基　　金：陕西省重点研发计划项目“油气田开发方案优化设计云平台”(2019ZDLGY11-04)。

摘　　要：由于压力恢复异常资料的试井解释问题尚未得到合理解决,对局部正常压力历史拟合难以准确评估关井期间地层压力变化,因此,基于胜利油田某页岩油区块两口油井压力恢复异常资料,分别采用复合油藏压裂井及三线性压裂水平井模型进行试井解释。在常规拟合基础上,通过定义附加压力函数,对异常数据段理论压力进行校正,最终形成了一套针对压力恢复异常数据的试井解释方法,通过实例应用得到储层及裂缝参数,参数解释结果较为合理,同时实现了异常段压力曲线的准确拟合。经对比计算得到两实例井压力历史整体拟合平均误差分别为0.31%和0.07%,有效验证了校正方法可行性。该方法可有效应对关井后期压力异常升高问题,准确预估地层压力恢复水平,从而为异常压力资料解释问题提供了新思路。The issue of interpreting well tests with abnormal pressure build-up data remains unresolved,making it difficult to accurately assess the changes in formation pressure during shut-in periods through localized normal pressure history matching.Therefore,based on the abnormal pressure build-up data from two shale oil wells in a block of the Shengli Oilfield,the well testing data were interpreted by respectively using composite reservoir fractured well model and trilinear fractured horizontal well model.On the basis of conventional matching,by defining an additional pressure function,the theoretical pressure of the abnormal data segments was corrected,finally forming a well test interpretation method specifically for abnormal pressure build-up data.The application of this method produced reasonable reservoir and fracture parameters,with accurate curve matching for the abnormal pressure segments.The overall average matching errors for the pressure history of the two case wells were 0.31%and 0.07%,respectively,effectively verifying the feasibility of the correction method.This approach can effectively address the issue of abnormal pressure rise during the late shut-in period,and can accurately predict the formation pressure build-up degree,providing a new perspective for interpreting abnormal pressure data.

关 键 词：井底压力 压力恢复 数据异常 试井分析 曲线拟合 附加压力 数据校正 

分 类 号：TE353[石油与天然气工程—油气田开发工程]