石油钻采工艺2023，Vol.45Issue(4)：478-484,7.DOI:10.13639/j.odpt.202208002
缝洞型碳酸盐岩气藏试气投产一体化技术
An integrated formation testing and production technology in fractured-vuggy carbonate gas reservoirs
摘要
Abstract
Natural fractures are well developed in fractured-vuggy carbonate gas reservoirs,which are prone to lost circulation during plugging after formation testing or killing before production.Moreover,such lost circulation presents large volumes and high rates,and the complex cases of high lost circulation proneness and high difficulties in plugging,and lost circulation associated with kickoff are sometimes encountered.An integrated pipe string for formation testing-temporary plugging-production was designed,and an integrated formation test and production technology,enabled by the core tool of the pressure-controlled downhole disconnection on/off valve,was developed.With the presented technology,the reservoir can be quickly plugged by annulus pressurization;the upper pipe string can be tripped out without killing;the completion string can be tied back in clear water or low-density working fluids to connect the reservoir,which allows for production with no induced flow.Field applications showed that this technology can effectively avoid lost circulation during well killing after formation testing in fractured-vuggy carbonate gas reservoirs,significantly reduce reservoir damage,and improve recovery factor of primary production.The presented technology has excellent prospects for application promotion.关键词
缝洞型碳酸盐岩/作业管柱/脱手回接开关阀/试气/投产/暂堵/提高采收率Key words
fractured-vuggy carbonate gas reservoir/operation string/disconnection on/off valve/formation testing/production/temporary plugging/enhanced gas recovery分类
能源科技引用本文复制引用
张文斌,张明友,贺秋云,黄靖富,谢奎,魏国安..缝洞型碳酸盐岩气藏试气投产一体化技术[J].石油钻采工艺,2023,45(4):478-484,7.基金项目
中国石油天然气集团公司关键核心技术攻关"230℃/140 MPa抗硫试油测试关键装备研制"(编号:2021ZG09) （编号:2021ZG09）
中石油川庆钻探工程有限公司国际工程公司项目"土库曼斯坦南约洛坦地区大尺寸复合管柱 300万m3/d产能非标井完井测试关键技术研究"(编号:CQ2022B-F-43-3). （编号:CQ2022B-F-43-3）
