海上混积岩储层酸压工艺研究与实践  

Research and Practice of Acid Fracturing Technology for Offshore mixed Rock Reservoirs

作　　者：宋玉良 Song Yuliang(Tianjin Branch of CNOOC Li Mited,Tianjin 300459)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300459

出　　处：《石化技术》2024年第11期223-225,共3页Petrochemical Industry Technology

摘　　要：BH油田是砂岩、碳酸盐岩混积低渗储层,由于其岩性分布复杂、平面上连通性差、纵向上薄互层发育等特征,投产后产能递减快,一方面常规解堵处理半径短,无法实现有效增产,另一方面由于井下存在筛管,进行加砂压裂经济性不足。针对以上两个难题,优化一趟多层投球滑套压裂管柱和多级交替注入工艺。目前酸压工艺在BH油田混积岩储层顺利完成施工,实施后日增油超70方,有效解决了混积岩储层连通性差,纵向无法充分动用的难题,为BH油田混积岩储层规模开发提供技术保障,为同类储层有效动用提供借鉴。BH oilfield is a low-per meability reservoir with a mixture of sandstone and carbonate rocks.Due to its co mplex lithological distribution,poor connectivity in the plane,and thin interbedded develop ment in the vertical direction,its production capacity decreases rapidly after production.On the one hand,conventional unblocking treat ment has a short radius,which cannot achieve effective production increase.On the other hand,due to the presence of screen pipes underground,sand fracturing is not econo mically feasible.To address the above two challenges,opti mize a multi-layer pitching sliding sleeve fracturing string and multi-stage alternating injection process.At present,the acid fracturing process has been successfully co mpleted in the mixed rock reservoir of BH oilfield,with a daily increase of over 70 cubic meters of oil after i mple mentation,effectively solving the proble m of poor connectivity and insufficient vertical utilization of mixed rock reservoirs.This provides technical support for the large-scale develop ment of mixed rock reservoirs in BH oilfield and provides reference for the effective utilization of si milar reservoirs.

关 键 词：混积岩储层 酸压工艺 一趟多层投球滑套压裂管柱 多级交替注入工艺 

分 类 号：TE53[石油与天然气工程—油气田开发工程]