塔河油田缝洞型油藏单井注水替油技术研究  

Single Well Water Injection Production in Tahe Fracture-Vuggy Reservoir

作　　者：荣元帅[1] 黄咏梅[1] 刘学利[1] 罗娟[1] 李峰[1] 

机构地区：[1]中国石化西北分公司勘探开发研究院,新疆乌鲁木齐830013

出　　处：《石油钻探技术》2008年第4期57-60,共4页Petroleum Drilling Techniques

基　　金：国家重点基础研究发展计划项目(973计划)"碳酸盐岩缝洞型油藏开发基础研究"(编号:2006CB202400)部分研究成果

摘　　要：塔河油田在碳酸盐岩油藏能量弱的定容性单井缝洞单元进行了注水替油试验,大幅度提高了原油采收率。通过全面分析塔河油田大量现场注水替油资料,提出了以下注水替油技术:选择通过机采手段无法正常生产的定容性油井进行注水替油,并优先选择溶洞型储集体油井;注水替油前要尽可能利用天然能量,在地层压力难以维持正常机抽生产时进行注水替油;在注水替油的第一个周期,周期注采比应控制在0.25～0.50;溶洞型储集体油井早期注采比应控制在1.0～2.0,中后期控制在0.5～1.0;裂缝性储集体油井早期注采比应控制在0.8～1.5,中后期控制在0.3～0.8;溶洞型储集体油井前期可适当提高注水速度,裂缝性储集体油井的注水速度不宜过高;注水压力应低于井口承压能力和地层破裂压力;注水焖井后开井产液量不能高于注水前正常生产时的产液量。这些技术为碳酸盐岩缝洞型油藏单井注水替油生产提供了理论依据和技术支撑。The application of water injection-production in constant-volume and weaker-energy single-well fracture-vug unit of carbonate fractured-vuggy reservoir in Tahe Oilfield greatly enhanced the oil recovery. Based on analyzing the field data of water injection-production in Tahe Oilfield, the following techniques to enhance oil recovery was proposed in this paper. The water should be injected into these constant-volumes which cannot be produced, and high priority should be on the vuggy reservoir. The natural energy should used before water injection-production. Water injection begins when formation pressure can not support the production, the first injection cycle, the injection production ratio should be controlled 0. 25-0. 50; ratio for vuggy should be 1.0-2.0 and 0.5-1.0 in later production period; ratio of fractured reservoir should be within 0. 8-1.5 and 0. 3-0. 8 in later production period; the injection speed can be increased for vuggy reservoir while injection speed for fractured reservoir should be low; injection pressure should lower than formation pressure and wellbore bearing pressure; the production liquid should be lower than the production liquid before injection.

关 键 词：碳酸盐岩油气藏 单井 注水替油 提高采收率 塔河油田 

分 类 号：TE357.6[石油与天然气工程—油气田开发工程]