荆西油田陵76井区剩余油分布规律研究

Remaining Oil Distribution Rules of Wellblock Ling 76 in Jingxi Oilfield

从油藏构造特征、沉积特征和注水开发现状等方面分析入手,采用数值模拟方法研究了陵76井区剩余油分布规律。研究表明,平面上剩余油分布主要集中在断层附近、岩性尖灭区、注水非主流区、物性较差油砂体、注采井网不完善区以及面积较小的油砂体上。由于陵76区块层间、层内非均质性严重,造成油井纵向上出力不均,纵向上剩余油主要分布的油砂体未压开层多,大部分油井含水较低,是下一步挖潜的主要方向。

Starting from reservoir structural,sedimentary characteristics,the method of numerical simulation was used to study the distribution rules of remaining oil in Wellblock Ling 76.The results show that in plane,the remaining oil was concentrated in the areas of near fault zones,the area of lithological pinchout,non main-stream area of water-flooding,area with imperfect water-flooding pattern and as well as on oil sandbodies with smaller areas.Because there exists serious interlayer and intralayer heterogerinety in Wellblock Ling 76,therefore there exists uneven output and the oil sands where the remaining oil is mainly distributed is not pressurized vertically,which results in low water content in the most of oil wells,it is the main direction for next tapping the potential of remaining oil.