封闭油藏不同含水期的井网方案优化
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摘要
合理的井网设计对油藏开发具有重要意义。文中结合典型地质数据,建立了机理模型,对某封闭油藏不同含水期的合理开发方案进行论证。结果表明:开发初期,弹性开采和反九点开采的合理运用可延长无水采油期并减缓含水上升速度;中含水期,五点法井网含水率上升慢,采出程度比排状井网高2.9百分点;高含水期,将低潜力油井由五点井网加密为斜五点井网效果最佳;特高含水期,相对于直井,水平井更有利于开采边界剩余油,将边界附近的老井侧钻为水平井成本最低,采收率为62.92%,近似等于新钻水平井采收率;同时对水平段长度进行优化,得出合理水平段长度在230 m左右。
Reasonable well pattern design is of great significance to reservoir development. Based on the typical geological data, this paper establishes the mechanism model, and theoretically demonstrates the reasonable development scheme of a closed reservoir at each stage. The analysis shows that the reasonable use of elastic recovery and reverse nine point recovery can extend the period of anhydrous recovery and slow down the rising speed of water cut. In the middle water-cut oil production period, the water-cut of fivepoint well pattern increases slowly, and the recovery degree is 2.9 percentage points higher than that of the row well network. In the high water cut period, and the low potential oil wells should be adjusted from five-point pattern to an inclined five-point pattern. In the super high water cut period, the horizontal well is more favorable to the remaining oil at the production boundary than the vertical well.In terms of economic benefits, lateral drilling of old wells near the boundary is the lowest cost and the recovery rate is 62.92%, which is approximately equal to the recovery rate of new horizontal wells. At the same time, the length of the horizontal section is optimized, and the length of the reasonable horizontal section is around 230 m.
Reasonable well pattern design is of great significance to reservoir development. Based on the typical geological data, this paper establishes the mechanism model, and theoretically demonstrates the reasonable development scheme of a closed reservoir at each stage. The analysis shows that the reasonable use of elastic recovery and reverse nine point recovery can extend the period of anhydrous recovery and slow down the rising speed of water cut. In the middle water-cut oil production period, the water-cut of fivepoint well pattern increases slowly, and the recovery degree is 2.9 percentage points higher than that of the row well network. In the high water cut period, and the low potential oil wells should be adjusted from five-point pattern to an inclined five-point pattern. In the super high water cut period, the horizontal well is more favorable to the remaining oil at the production boundary than the vertical well.In terms of economic benefits, lateral drilling of old wells near the boundary is the lowest cost and the recovery rate is 62.92%, which is approximately equal to the recovery rate of new horizontal wells. At the same time, the length of the horizontal section is optimized, and the length of the reasonable horizontal section is around 230 m.
引文
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[12]史雪冬,岳湘安,张俊斌,等.聚驱后油藏井网调整与深部调剖三维物理模拟实验[J].断块油气田,2017,24(3):401-404.
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[15]范雪平.G油田高速高效开发方案优化研究[D].青岛:中国石油大学(华东),2012.
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[17]吕爱民,姚军,王伟,等.面积注水开发指标计算方法的改进[J].新疆石油地质,2012,33(2):189-192.
[18]陶丽,王相,姜涛.特高含水期水驱砂岩油田井网部署自动优化方法[J].断块油气田,2017,24(6):808-812.
[2]李传亮,朱苏阳.关于油藏含水上升规律的若干问题[J].岩性油气藏,2016,28(3):1-5.
[3]周鹏,王庆勇,张凤喜,等.预测水驱油田含水率的新模型及应用[J].断块油气田,2017,24(4):522-524,535.
[4]谷建伟,刘志文,于秀玲,等.基于剩余油可动潜力控制程度的井网调整研究[J].特种油气藏,2017,24(6):84-89.
[5]肖春艳,李伟,肖淑萍.边底水油藏开采机理与含水上升规律[J].断块油气田,2009,16(6):68-70.
[6]刘小鸿,缪飞飞,崔大勇,等.水驱油田理论含水上升率预测新方法及其应用[J].断块油气田,2013,20(6):736-739.
[7]樊兆琪,程林松,耿昌浩,等.低渗透油藏储层非均质性评价与井网调整新方法[J].石油钻探技术,2013,41(2):93-98.
[8]刘义坤,王亮,王福林.数值模拟技术在塔中4油田井网调整研究中的应用[J].岩性油气藏,2010,22(1):119-121,125.
[9]郑小杰,钟伟,段洪泽,等.强底水油藏注水开发可行性研究[J].断块油气田,2015,22(2):234-236,250.
[10]赵志峰.河流相砂岩油藏特高含水期井网调整技术研究[D].青岛:中国石油大学(华东),2007.
[11]刘子良,魏兆胜,陈文龙,等.裂缝性低渗透砂岩油田合理注采井网[J].石油勘探与开发,2003,30(4):85-88.
[12]史雪冬,岳湘安,张俊斌,等.聚驱后油藏井网调整与深部调剖三维物理模拟实验[J].断块油气田,2017,24(3):401-404.
[13]张烈辉,郭晶晶.油气藏数值模拟基本原理[M].北京:石油工业出版社,2014:26-38.
[14]米京博.静17块小井距加密调整方案研究[D].大庆:东北石油大学,2015.
[15]范雪平.G油田高速高效开发方案优化研究[D].青岛:中国石油大学(华东),2012.
[16]姜汉桥,姚军,姜瑞忠.油藏工程原理与方法[M].2版.东营:中国石油大学出版社,2006:33-50.
[17]吕爱民,姚军,王伟,等.面积注水开发指标计算方法的改进[J].新疆石油地质,2012,33(2):189-192.
[18]陶丽,王相,姜涛.特高含水期水驱砂岩油田井网部署自动优化方法[J].断块油气田,2017,24(6):808-812.