常压页岩气井排液求产影响因素分析  

Analysis of Influencing Factors on Drainage for Production in Shale Gas Wells under Constant Pressure

作　　者：蒋嫚 JIANG Man(Downhole Testing Company of Sinopec Oilfield Service Jianghan Corporation, Wuhan, Hubei 430000, China)

机构地区：[1]中石化江汉石油工程有限公司井下测试公司,湖北武汉430000

出　　处：《江汉石油职工大学学报》2022年第2期21-23,共3页Journal of Jianghan Petroleum University of Staff and Workers

摘　　要：常压页岩气的天然弹性驱动能量不充足,压后日产液量大、泄压快,无法有效自喷排液。分析常压页岩气井排液求产影响,对比现场5口常压页岩气井可压性、压后排液效果和产量,证明压裂施工期间采取液氮伴注措施,有利于常压页岩气井压后初期液体快速返排;常压页岩气井压后应立即采取无控制返排措施,若采取焖井或控制排液措施,将不利于液体的排出,影响求产效果。The natural elastic drive energy of shale gas under the constant pressure is insufficient,and the daily fluid production after fracturing is massive with fast depletion,leading to failure to flowing drainage.Through the analysis of the influence of drainage on production in shale gas wells under the constant pressure,and comparing the compressibility of 5 shale gas wells and their post-frac effect and production,it is proved that adopting nitrogen-injection stimulation during the frac job is beneficial to rapid fluid flowback at the initial stage.The uncontrolled flowback shall be adopted immediately after fracturing;if soaking the well or controlling drainage is adopted,it will be unfavorable to drainage and affect producing effect.

关 键 词：常压页岩气 压力系数 排液求产 助排 

分 类 号：TE375[石油与天然气工程—油气田开发工程]