摘要
以渤海N油田为例,针对以水平井开发为主的含隔层储层含水率上升快、储量动用程度低的特点,开展强弱交替周期注水研究。结果表明,对于此类油藏,强弱交替周期注水开发效果优于常规周期注水。在强注半周期内,提高注采比至1.3可以在一定程度上控制底水锥进速度、降低生产井含水率;在弱注半周期内,将注采比控制在0.8左右,可以延缓强注周期内注入水突破至井底的时间。根据研究结果,开展了2注2采井组的矿场先导试验,实施后井组含水率下降了1%~14%,单井平均日增油6~22 m^3。
In this paper, Bohai N oilfield is taken as an example for horizontal well oriented development interlayer reservoir, to carry out alternate cycle water injection, because the water content rises fast and there is low utilization of reserves. The results show： for these reservoirs, the alternating cycle injection is better than conventional water flood development cycle injection. In the strong injection half cycle, injection - production ratio improving to 1.3 can control water coning speed to a certain extent and reduce water cut in production wells. In the weak injection half cycle, the injection - production ratio controlled at about 0.8, can delay the time that the injection of water breaks through to the bottom of the well. According to the results, field pilot tests of 2 injection in 2 wells are car- ried out, water cut decreases by 1% to 14% , the average increasing oil rate is 6 -22 m3/d.
出处
《重庆科技学院学报（自然科学版）》
CAS
2018年第1期35-39,共5页
Journal of Chongqing University of Science and Technology：Natural Sciences Edition
基金
国家科技重大专项"海上油田丛式井网整体加密及综合调整油藏工程技术应用研究"(2011ZX05024-002-007)
关键词
河流相
底水油藏
水平井
周期注水
稳油控水
fluvial facies
bottom water reservoir
horizontal well
cyclic water flooding
stabilizing oil productionand controlling water cut
