摘要
为满足渤海油田高速高效开发的技术需求,利用生物显微镜和岩心驱替实验研究了分散调驱体系的膨胀性能和注入性能,以及注入速率对分散调驱体系运移性能和驱油效果的影响。研究结果表明,在渤海B油藏环境下,超分子型分散调驱体系初始粒径为3.9μm,水化膨化192 h后粒径膨胀了3.41倍,具有良好的水化膨胀效果。在注入过程中部分超分子型分散调驱体系会在岩心端面滞留产生端面效应,导致岩心渗透率降低。注入速率增加会使分散调驱体系更多地进入岩心内部,从而有利于调驱体系的深部运移和封堵。但对于非均质油藏,注入速率过高会导致部分分散调驱体系进入低渗层,造成低渗层的吸液压差降低,最终采收率降低。超分子型分散调驱体系与水交替注入可不同程度地提高最终采收率。
In order to meet the technical requirements of high-speed and efficient development of Bohai oilfield,the expansion performance and injection performance of the dispersed profile control and drive(DPCD)system in the flasks and porous media was studied,the influence of injection speed on the migration performance and oil displacement effect of the DPCD system was as well as investigated by using the biomicroscope and core displacement experiment.The results showed that in the environment of Bohai B reservoir,the initial particle size of the super molecular type DPCD system was 3.9μm,and the particle size expanded 3.41 times after 192 hours of hydration and expansion,which indicated that the DPCD had a good effect of hydration and expansion.In the process of injection,some supramolecular DPCD systems would stay at the end face of the core,resulting in the end face effect.The lower the permeability was,the more serious the end face effect was.The increase of injection speed could make the DPCD system enter the core deeply,which was conducive to the deep migration and sealing of the DPCD system.However,for heterogeneous reservoirs,high injection rate would make a part of the DPCD system enter into the low-permeability layer,resulting in a decrease of the suction differential pressure of the low-permeability layer and the final recovery factor.The alternative injection of water and the DPCD system could improve the final recovery to some degree.
作者
刘进祥
王斌杰
于复东
卢祥国
张云宝
夏欢
张楠
何欣
LIU Jinxiang;WANG Binjie;YU Fudong;LU Xiangguo;ZHANG Yunbao;XIA Huan;ZHANG Nan;HE Xin(Key Laboratory of Enhanced Oil and Gas Recovery(Ministry of Education),Northeast Petroleum University,Daqing,Heilongjiang 163318,P R of China;No.6 Oil Production Plant,Daqing Oilfield Company,PetroChina,Daqing,Heilongjiang 197901,P R of China;Bohai Oil Research Institute,Tianjin Branch,CNOOC,Tanggu,Tianjin 300452,P R of China)
出处
《油田化学》
CAS
CSCD
北大核心
2021年第1期52-57,74,共7页
Oilfield Chemistry
基金
“十三五”重大专项子课题“渤海双高油田多级窜逸堵调驱一体化技术研究及示范”(项目编号2016ZX05058-003-010)。
关键词
分散调驱体系
注入速率
端面效应
粒径分布
传输运移
交替注入
dispersed profile control and drive system
injection speed
end effect
particle size distribution
transport and migration
alternate injection
