强边水小断块油藏聚驱后期开发技术对策研究

doi:10.13809/j.cnki.cn32-1825/te.2020.06.011

摘要/Abstract

摘要：

针对双河油田强边水小断块油藏聚驱后期递减持续增加的问题,研究了影响聚驱后期开发效果的因素,主要包括：①边水能量强,边部油井见效率低;②聚驱井网不规则,聚窜严重;③地层堵塞油井的产液量降幅大等。为了改善聚驱后期开发效果,进一步提高采收率,开展了强边水小断块油藏的改善开发效果技术对策研究。运用数值模拟技术研究不同注采参数条件下边部井组聚驱驱替效果,界定强边水油藏边部井组合理注采比,拟合小井距聚驱井网不同注采方式对单井点窜流的抑制作用,明确了抑制单井点聚窜的最佳方式,运用油藏工程方法研究不同聚驱阶段油井堵塞半径,提出聚驱后期堵塞油井治理对策,现场应用取得了较好的效果。

关键词: 强边水, 聚合物驱, 数值模拟, 改善开发效果, 小断块油藏

Abstract:

In order to solve the problems of decline continues to increase,carry out the research on the factors affecting the development effect of polymer flooding in the later stage.There are some problems in the small faulted block reservoir He Er Duan of Shuanghe Oilfield, such as strong edge water energy shows low efficiency, irregular well pattern leads to fluid channeling,formation plugging results in a large drop in well fluid production and so on.In order to improve the development effect of polymer flooding in later stage and further enhance oil recovery.Studing the effect of cluster displacement under different injection-production parameters by numerical simulation technology,define reasonable injection-production ratio. The inhibition effects reserched single point cross-flow in different injection-production way by numerical modeling, and draw the best way. Study on radius of oil congestion in polymer flooding stage and come up with reasonable countermeasures,good field application effect had been taken.

Key words: strong edge water, polymer flooding, numerical simulation, improve the development effect, small fault-block reservoir

中图分类号:

TE357

张磊,贾兰,张道连. 强边水小断块油藏聚驱后期开发技术对策研究[J]. 油气藏评价与开发, 2020, 10(6): 72-77.

Lei ZHANG,Lan JIA,Daolian ZHANG. Developing technical countermeasures in the late stage of polymer flooding in small fault block reservoirs with strong edge water[J]. Reservoir Evaluation and Development, 2020, 10(6): 72-77.

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年份	生产压差/MPa	累积产油/10⁴ t	累积产水量/10⁴ m³	地层亏空/10⁴ m³	累积水侵量/10⁴ m³
1987	-1.02	5.70	8.78	18.80	15.65
1992	-0.55	11.60	55.48	76.46	69.08
1997	-1.13	17.33	148.07	186.94	168.46
2002	-1.98	24.56	295.39	360.95	324.40
2007	-2.66	32.05	557.29	639.75	595.15
2011	-2.30	36.01	777.70	866.67	820.06