多层系油藏剩余油分布的精细数值模拟技术

Applying fine numerical simulation technique to remaining oil distribution in oil reservoir with multiple series of strata.

针对东辛油田营 8块沙河街组地质构造复杂 ,开发历史长 ,合采合注井多 ,作业措施频繁 ,已进入特高含水期等特点与难点 ,采取了优选主力目标层 ,精细储量复算 ,优选模型区 ,优化网格 ,三维角点地质建模 ,分层系岩石流体物性控制 ,精细动态生产数据控制和精细历史拟合等数值模拟研究技术措施 ,分析了老区断块油藏特高含水期平面、纵向水淹状况和剩余油分布规律 ,确定了影响剩余油分布的主要因素 。

Shahejie sandstones of Ying 8 block in Dongxin oilfield belong to fault block oil reservoir with multiple series of strata. Aimed at its complicated geological structure, longterm development features, many commingled producers and injectors, frequent operations and extra-high water-cut, some numerical simulation techniques were applied to the analysis of water flooded feature and remaining oil distribution in the plane and the vertical in fault block oil reservoirs of old area, and to the determination of the main factors of influence on the remaining oil distribution. It includes optimized selection of major target stratum, fine recalculation of oil reserves, optimized selection of simulation area, optimized grid, 3-D geological model establishment of corner point, stratified control of physical properties of rock and fluid, accurate control of dynamic data, fine history matching. Based on the research results, some available adjustment measures were put forward for further recovery of the remaining oil.