海上油田电泵生产井储层岩石扩容增产实践  

Practice of reservoir rock dilation to increase production in electric pump production wells in offshore oil fields

作　　者：孙林 徐斌 邹信波 杨军伟 李旭光 SUN Lin;XU Bin;ZOU Xinbo;YANG Junwei;LI Xuguang(CNOOC EnerTech-Drilling&Production Co.,Tianjin 300452,China;Origin Geomechanics Inc.,Calgary TH30X3,Canada;Department of Civil Engineering,University of Calgary,Calgary T2N 1N4,Canada;Shenzhen Brach of CNOOC China Limited,Shenzhen 518067,China)

机构地区：[1]中海油能源发展股份有限公司工程技术分公司,天津300452 [2]OGI地质力学公司,加拿大卡尔加里TH30X3 [3]卡尔加里大学土木工程系,加拿大卡尔加里T2N 1N4 [4]中海石油(中国)有限公司深圳分公司,广东深圳518067

出　　处：《大庆石油地质与开发》2022年第1期77-83,共7页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家科技重大专项“大型油气田及煤层气开发”(2016ZX05058);中海油能源发展股份有限公司重大科技专项“油水井作业暂堵、解堵及乳化液处理关键化学剂研发”(HFZXKT-GJ2020-01-04)。

摘　　要：针对海上油田平台空间有限、措施工艺受限等技术应用难题,提出了海上电泵生产井不动管柱岩石扩容技术。对海上油田储层扩容机理进行分析,说明了该技术适用于海上疏松和致密砂岩2类储层类型;设计了合适的海上油田扩容压力,并提出了与酸化技术相结合的实施方法,以降低扩容井口注入压力或增注提效;进行了电泵生产井不动管柱岩石扩容技术矿场试验,试验井酸化阶段降压增注效果明显,扩容半径为10~12 m,地层孔隙度增加1.6%~2.0%,试验井日产液量由213.7 m^(3)增加至405.2 m^(3),不动管柱施工符合海上油田快速作业的特点。研究成果进一步拓展了技术应用范围,在海上油田具有广阔的应用前景,并为国内外同类井况条件下的技术应用提供借鉴。In view of technical application problems such as limited space of offshore oilfield platform and restricted measure process,rock dilation technology of offshore electric pump production well with immobile tubular column is proposed.Analysis of the reservoir expansion mechanism in offshore oil fields,and it is verified that the technology is suitable for 2 types of reservoirs,namely,offshore loose and dense sandstone.Suitable injection pressure at wellhead of dilation well in offshore oilfield is selected,and implementation method combined with acidizing technique is proposed to reduce injection pressure at wellhead of dilation well or to increase injection efficiency.Test wells have significant effect of pressure reduction and injection increase in acidizing stage,with dilation radius of 10~12 m,formation porosity increased by 1.6%~2.0%,and test wells’daily fluid production increased from213.7 m^(3)to 405.2 m^(3).The process without string movement has advantages of fast offshore operation.The research results further expand application scope of the technology,which has a broad application prospect in offshore oil fields and provides a reference for the application of the technology under similar well conditions at home and abroad.

关 键 词：岩石扩容 电泵 生产井 不动管柱 酸化 解堵 海上油田 

分 类 号：TE357[石油与天然气工程—油气田开发工程]