摘要
川西须家河高应力致密储层破裂压力高、改造排量低、完井管柱安全风险高,通过对前期储层改造井系统梳理分析,从井口限压、降破工艺、完井管柱及工具结构等方面出发,配套完善了一套适用于致密储层压裂改造的技术。D201井采用140 MPa井口装置提高施工压力到120 MPa,相比105 MPa井口提高施工压力25 MPa,解决了井口限压低、加砂难度大的问题;M2井采用后效射孔技术改善高破裂压力井近井地带的渗流形态,有效提高储层的可压性;X5井采用Ф114.3 mm+Ф88.9 mm大尺寸油管配套高强度工具的完井技术,提高施工排量及管柱安全性,满足高应力致密储层大排量、大液量、高施工压力的改造需求。该技术的成功应用为高应力致密储层完井提供了新思路,为储层产能释放提供了技术保障。
The Xujiahe high stress tight reservoir in western Sichuan has high fracture pressure,low transformation displacement,and high safety risk of testing strings.Through sorting and analyzing the well system of the previous reservoir transformation,a set of technologies suitable for tight reservoir fracturing transformation has been developed from the aspects of wellhead pressure limiting,fracture reduction technology,testing strings,and tool structure.The D201 well adopts a 140 MPa wellhead device to increase the construction pressure to 120 MPa,which is 25MPa higher than the 105MPa wellhead.This solves the problems of low wellhead pressure limit and high difficulty in adding sand;The M2 well adopts post effect perforation technology to improve the flow pattern near the wellbore of high fracture pressure wells,effectively improving the compressibility of the reservoir;Well X5 adoptsФ114.3 mm+Ф88.9 mm large-sized oil pipes equipped with high-strength tools improves the construction displacement and string safety,meeting the transformation needs of high displacement,large liquid volume,and high construction pressure in high stress and tight reservoirs.The successful application of this technology provides a new approach for testing high stress and tight reservoirs,while also providing technical support for releasing reservoir productivity.
作者
夏彪
刘啸峰
唐鹏程
卢丽
XIA Biao;LIU Xiaofeng;TANG Pengcheng;LU Li(Petroleum Engineering Technology Research Institute of Petrochina Southwest Oil and Gas Company,Deng Yang,Sichuan 618000,China)
出处
《油气井测试》
2023年第4期50-55,共6页
Well Testing
关键词
须家河致密储层
储层改造
降破工艺
井口装置
后效射孔
破裂压力
可压性
完井管柱优化
Xujiahe tight reservoir
reservoir stimulation
breaking down process
wellhead device
aftereffect perforation
fracturing pressure
compressibility
optimization of completion string
