反九点井网注水开发特征分析

发布时间：2018-09-12 11:49

【摘要】：在油田实际开发中,经常遇到反九点井网问题,而由于反九点井网的不对称性,导致角边井工作制度的不同会影响到其水驱开发效果。为了研究反九点井网的水驱开发特征,该文通过压降叠加原理得到了其稳态压力分布方程,并通过求解流函数方程得到了反九点井网流线场,最后,沿着流线利用特征线方法解析求解了饱和度方程,从而实现了对反九点井网的水驱开发模拟。研究结果表明:角边井的流量比R的变化会直接影响到井网的流场分布以及各项水驱开发指标的变化;随着R的增加,流向角井的流线数目增多,且角井的水驱控制面积增大,此外,井网见水时刻的面积波及效率也随之增大,但当其增大到一定程度后,增加速度明显减缓,并最终将趋向于五点井网的面积波及效率。研究结果揭示了反九点井网的水驱开发特征,为实现反九点井网的合理开发提供了理论基础。
[Abstract]:In the actual development of oil field, the problem of anti-nine-spot well pattern is often encountered, and because of the asymmetry of anti-nine-spot well pattern, the different working system of corner and side well will affect the development effect of water drive. In order to study the characteristics of water drive development of inverse nine-spot well pattern, the steady pressure distribution equation is obtained by the principle of pressure drop superposition, and the flow line field is obtained by solving the flow function equation. The saturation equation is solved by the characteristic line method along the streamline, and the water drive development simulation of the inverse nine-spot well pattern is realized. The results show that the change of flow ratio R will directly affect the flow field distribution of well pattern and the change of water drive development index, with the increase of R, the number of flow lines and the control area of water drive increase with the increase of R. In addition, the area sweep efficiency of the well pattern increases with it, but when it increases to a certain extent, the increase speed obviously slows down, and eventually tends to the area sweep efficiency of the five-spot well pattern. The research results reveal the development characteristics of the anti-nine-spot well pattern and provide a theoretical basis for the rational development of the anti-nine-spot well pattern.
【作者单位】：中国地质大学(北京)能源学院;
【基金】：中国地质大学(北京)基本科研业务费专项资金资助优秀导师基金项目(No.53200859546)~~
【分类号】：TE357.6

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