特高含水油藏不稳定注水技术研究与应用  

Study and field application of unstable water injection in ultra-high water cut reservoir

作　　者：卢久涛 LU Jiutao(Exploration and Development Research Institute of Zhongyuan Oilfield Company,SINOPEC,Zhengzhou,Henan 450018,China)

机构地区：[1]中国石化中原油田分公司勘探开发研究院,河南郑州450018

出　　处：《世界石油工业》2021年第3期50-57,共8页World Petroleum Industry

摘　　要：针对东濮凹陷特高含水期剩余油分布零散,认识和挖潜难度大,稳定注水很难满足油田开发实际需要的矛盾,开展了不稳定注水技术研究和应用。通过调研、室内物理模拟实验以及油藏数值模拟等技术,发现不稳定注水技术是一项切实可行的既投入少又能明显实现油藏降低无效注水量与无效产液量的油藏综合开发调整技术。本着边研究边应用的原则,在“十三五”期间,整个东濮凹陷共实施不稳定注水技术1689井次,累计增油16.44×10^(4)t,整体降低含水率2.3个百分点,取得了较好的降水增油效果。In view of the scattered distribution of remaining oil in the ultra-high water cut period in Dongpu Sag,it is difficult to recognize and explore potential,and conventional steady water injection is difficult to meet the actual needs of oilfield development.Through investigation,indoor physical simulation and reservoir numerical simulation,it is found that unstable water injection is a feasible comprehensive reservoir development adjustment technology,which can meet the requirements of low input and obviously reduce the ineffective water injection and ineffective fluid production.Based on the principle of simultaneous research and application,during the 13th Five-Year Plan period in Dongpu Sag,a total of 1689 times were implemented unstable water injection technology.The cumulative effect of oil increase was 164400 tons,and the overall water cut was reduced by 2.3 percentage points,thus achieving a good effect of precipitation and oil increase.

关 键 词：不稳定注水技术 变强度注水 周期注水 脉冲注水 注采耦合 复合调流场注水 特高含水油藏 

分 类 号：TE357.6[石油与天然气工程—油气田开发工程]