南海东部古近系低渗储层压裂作业实践  

Application of Hydraulic Fracturing Technology in Paleogene Low Permeability Reservoirs in the East of South China Sea

作　　者：吴浩武 张庆华 袁文奎 WU Haowu;ZHANG Qinghua;YUAN Wenkui(CNOOC(China)Shenzhen Branch,Shenzhen 518000,China;China Oil Services Limited,Tianjin 300450,China)

机构地区：[1]中海石油(中国)有限公司深圳分公司,广东深圳518000 [2]中海油服油田生产事业部增产中心,天津300450

出　　处：《广东石油化工学院学报》2024年第3期58-63,共6页Journal of Guangdong University of Petrochemical Technology

摘　　要：南海东部古近系储层探明地质储量大,是南海东部增储上产的重要接替力量,但古近系储层物性差,常规措施无法实现有效开发。为此,针对古近系储层实施了水力压裂试验,取得了一些认识:针对海上生产井复杂的井身结构及生产状况,论证了不同的压裂方式,最终采用预置管柱分段压裂方式;针对低渗储层大斜度定向井压裂,形成了“多段塞+低排量+低砂比+大砂量”的工艺设计思路;根据海上作业条件及储层物性,优选并成功应用了海水基压裂液体系;针对海上平台特殊的作业环境,形成了生产平台压裂及拖轮压裂作业方法,可为后续海上压裂作业提供良好的借鉴。The proved OOIP of Paleogene reservoirs in the east of South China Sea is huge and important successor for increasing production in the future.However,the reservoir characteristics of Paleogene formation is worse.It is difficult to achieve good results with conventional stimulation measurements.Therefore,hydraulic fracturing is carried out in Paleogene reservoirs,and some knowledge is obtained:in view of the complex wellbore schematic and production status of offshore production wells,different fracturing methods are demonstrated,and finally the preset string segmented fracturing method is adopted.For the fracturing of large-scale directional wells in low-permeability reservoirs,the process design idea of"multi slug+low displacement+low sand ratio+large sand volume"is formed.According to the offshore operation conditions and reservoir physical properties,the seawater based fracturing fluid system is optimized and successfully applied.In view of the special operating environment of offshore platforms,the production platform fracturing and tugboat fracturing operation methods have been formed,which provides a good reference for subsequent offshore fracturing operations.

关 键 词：南海东部古近系 分层压裂 海水基压裂液 平台压裂 拖轮压裂 

分 类 号：TE53[石油与天然气工程—油气田开发工程]