双河油田Ⅳ1-3层系非均相复合驱井网调整研究

doi:10.13809/j.cnki.cn32-1825/te.2020.06.013

摘要/Abstract

摘要：

非均相复合驱是提高聚合物驱后油藏采收率的开发技术,而合理的井网调整是提高非均相复合驱增油效果的主要手段。通过数值模拟,对双河油田Ⅳ1-3层系井网调整的井网形式、井距大小、流线转变角度等开展了系统研究,并从技术、经济方面进行了综合对比论证。研究结果表明：注入体系与原油的黏度比、地层的非均质性对井网流线调整效果具有决定性影响。对于双河油田Ⅳ1-3层系,在充分利用老井的前提下,采用五点法面积井网、井距150~300 m,较大幅度地调整流线角度,能够进一步提高非均相复合驱的降水增油效果。

关键词: 井网形式, 注采井距, 流线转变, 数值模拟, 非均相复合驱

Abstract:

The heterogeneous composite flooding has been proved to be an effective development technology to greatly improve oil recovery after polymer flooding, and the reasonable well pattern adjustment is the main method to improve the performance of heterogeneous composite flooding. By numerical simulation, the well pattern form, well spacing and flow line transformation angle of well pattern adjustment in Ⅳ1-3 reservoir of Shuanghe Oilfield have been systematically studied, and the comprehensive comparison and demonstration have been carried out from technical and economic aspects. The results show that the viscosity ratio of injection system to crude oil and the heterogeneity of formation have a decisive influence on the adjustment effect of well pattern flow line. For Ⅳ1-3 reservoir of Shuanghe Oilfield, on the premise of making full use of the old wells, the adoption of five points well pattern and well spacing of 150 ~ 300 m, and the great adjustment of the flow line angle can further improve the performance of heterogeneous composite flooding in decreasing water cut and increasing oil production.

Key words: well pattern type, injection-production well spacing, flow line transformation, numerical simulation, heterogeneous composite flooding

中图分类号:

TE319

张连锋,梁丽梅,薛国勤等. 双河油田Ⅳ1-3层系非均相复合驱井网调整研究[J]. 油气藏评价与开发, 2020, 10(6): 85-89.

Lianfeng ZHANG,Limei LIANG,Guoqin XUE, et al. Well pattern adjustment for heterogeneous composite flooding in Ⅳ1-3 reservoir in Shuanghe Oilfield[J]. Reservoir Evaluation and Development, 2020, 10(6): 85-89.

图/表 7

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井网形式	最终采收率/%
五点	53.06
反七点	52.70
反九点	52.66
行列式	52.53

转变角度/（°）	提高采收率/%
原方向	5.17
30	5.59
45	6.36
60	5.80