川东深层致密砂岩储层改造难点及技术现状  

Stimulation Difficulties and Technical State of Eastern Sichuan Deep Tight Sandstone Reservoir

作　　者：段华[1] 李枚 邓燕[2] 扶喆一 殷雪峰[1] DUAN Hua;LI Mei;DENG Yan;FU Zhe-yi;YIN Xue-feng(SINOPEC Exploration Company,Chengdu 610041,China;Southwest Petroleum University,State Key Lab of Oil and Gas Geology and Exploitation,Chengdu 610500,China)

机构地区：[1]中国石化勘探分公司,成都610041 [2]油气藏地质及开发工程国家重点实验室,西南石油大学,成都610500

出　　处：《科学技术与工程》2020年第5期1846-1850,共5页Science Technology and Engineering

基　　金：“十三五”国家科技重大专项(2016ZX05002-004)。

摘　　要：川东YL地区陆相致密砂岩气藏埋藏深、岩性致密,压裂改造是实现该区域有效勘探开发的必要手段,但YL地区深层致密砂岩压裂改造面临着破裂压力超高、施工压力超高、闭合压力超高、排量提升困难、缝高控制困难等技术难题,大部分气井压后产能低且产量递减快。储层改造工艺技术能否取得突破,直接影响到了该地区的勘探开发进程。通过分析YL地区深层致密砂岩气藏的储层特征,总结前期现场实践中面临的技术难题及实施经验,提出一套适用于川东深层致密砂岩气藏的压裂改造工艺技术,可有效促进地区勘探开发工作,对同类型的深层致密砂岩压裂改造具有借鉴意义。The terrestrial tight sandstone reservoirs in YL area in eastern Sichuan are characterized with deep location and tight-ness.Hydraulic fracturing is the key technique to effectively exploit this reservoir.Fracturing in tight sandstone in eastern Sichuan is faced with some difficulties,such as super high breakdown pressure,super high treatment pressure,high closure pressure,low pumping rate,fracture height uncontrollable,and so on.Production capacity of most gas well is low and decreases fast after fracturing.Whether the fracturing technology can make a breakthrough in this tight reservoir stimulation will directly affect its exploration and development progress.A set of fracturing technology suitable for deep tight sandstone gas reservoirs stimulation in eastern Sichuan is built by analysis of reservoir feature and the summary of technical difficulties and practical experience in previous field practices,which has reference significance for similar deep sand tight fracturing reconstruction.

关 键 词：川东 深层致密砂岩 储层改造 压裂工艺 

分 类 号：TE355[石油与天然气工程—油气田开发工程]