低渗气藏产能测试评价技术  

Productivity testing and evaluation technology for low-permeability gas reservoirs

作　　者：宋刚祥 伍锐东 罗岐岚 朱文娟 马恋 闫鑫源 SONG Gangxiang;WU Ruidong;LUO Qilan;ZHU Wenjuan;MA Lian;YAN Xinyuan(Shanghai Branch of CNOOC Ltd.,Shanghai 200335,China)

机构地区：[1]中海石油(中国)有限公司上海分公司,上海200335

出　　处：《油气井测试》2022年第6期74-77,共4页Well Testing

基　　金：中海油重大科技专项“西湖凹陷在生产油气田中后期综合调整关键技术研究与实践”(KJ135ZDXM39SH03)

摘　　要：针对低渗气藏测试经常出现压力不稳定、恢复缓慢导致测试解释及产能求取受阻的问题,提出短时不关井等时试井和简化的修正等时试井快速产能测试方法。短时不关井等时试井在等时试井的基础上,以井筒储集效应时间作为等时流动时间,剔除等时试井中关井阶段;简化的修正等时试井方法能规避产能方程负斜率风险,不进行延续期的测试。简化的修正等时试井方法应用于海上M低渗气藏,有效地缩短测试时间,取得良好效果。该技术可为同类低渗致密气藏产能测试评价提供技术支撑。During testing of low-permeability gas reservoirs,unstable and slowly recovered pressure cause difficulty in testing interpretation and productivity calculation.In order to solve this problem,a short-term non-shut-in isochronal well testing and simplified modified isochronal well testing method was proposed for rapid productivity testing.On the basis of isochronal well testing,the short-term non-shut-in isochronal well testing takes the wellbore storage effect time taken as the isochronal flow time,and excludes the shut-in period in the isochronous well testing.The simplified modified isochronal well testing method can avoid the slope of productivity equation being negative,and performs no testing for extended period.The simplified modified isochronal well testing method was applied to the offshore low-permeability gas reservoir M,which can effectively shorten the testing time and achieve better results.This technology can provide a technical support on productivity testing and evaluation for similar low-permeability tight gas reservoirs.

关 键 词：低渗气藏 产能测试 修正等时试井 不关井等时试井 井储效应 等时流动时间 试井解释 

分 类 号：TE353[石油与天然气工程—油气田开发工程]