摘要
对于复杂断块油藏注水开发后期,剩余油分布规律刻画难度大,如何寻找剩余油甜点区成为提高水驱采收率关键。以H区块为例,在分析不同韵律性储层水淹特征基础上,开展剩余油分布特征研究,剩余油主要分布在生产井间、断层附近剩余油富集以及正韵律和渗透率极差小的反韵律厚油层顶部,并对不同类型剩余油制定合理的挖潜对策,包括实施加密井、老井侧钻及厚层顶部部署水平井等,现场部署实施各类井23口,日注水量增加440方,日产油量最高增加170t,采油速度提高0.28%,阶段累增油5.7万t,预计可提高水驱采收率5%,实现水驱控制储量有效动用。
For complex fault block reservoirs in the later stage of water injection development,it is difficult to characterize the distribution pattern of remaining oil.Finding the sweet spot area of remaining oil becomes the key to improving water flooding recovery.This article takes Block H as an example,analyzes the water flooding characteristics of different rhythmic reservoirs,and conducts research on the distribution characteristics of remaining oil.The remaining oil is mainly distributed between production wells,near faults,and at the top of thick oil layers with small differences in normal rhythm and permeability,And develop reasonable potential tapping strategies for different types of remaining oil,including implementing infill wells,old well side drilling,and horizontal wells deployed at the top of thick layers.Deploy and implement 23 types of wells on site,increasing daily water injection by 440 cubic meters,the highest daily oil production by 170 tons,increasing oil recovery rate by 0.28%,and accumulating 57000 tons of oil in each stage.It is expected to increase waterflooding recovery rate by 5%and achieve effective utilization of waterflooding controlled reserves.
作者
王恩博
Wang Enbo(PetroChina Hiaohe OiHfieHd Company,Panjin 124010)
出处
《石化技术》
CAS
2024年第3期208-210,共3页
Petrochemical Industry Technology
关键词
高含水期
剩余油
分布特征
挖潜对策
High water cut stage
Remaining oil
distribution characteristics
Potential tapping strategies
