相控条件下剩余油的数值模拟

Numerical simulation for remaining oil under microfacies constraints

针对非均质油田的地质特点 ,分析了剩余油的分布 ;按沉积微相选用相对渗透率曲线 ,研究了各类油层的水驱规律 ,建立了相控条件下的地质模型 ,并对单井及全区的含水率、产油量进行了历史拟合 .数值模拟结果表明 :用相控方法建立的地质模型 ,能反映各个单砂层的平面分布特点及对流体平面流动的控制 ,误差为 17.3 % ;相控条件下的数值模拟分相带区域进行精细历史拟合 ,其成果能量化不同开采时期和一定阶段下的不同沉积微相动用状况和剩余油分布 ,拟合含水率符合率为 92 .60 % ,较常规拟合提高 10 .0 0 % ,模拟数值与实际数值比较接近 .

In the light of geology characteristics about heterogeneous oil field, distribution of remaining oil has been analyzed, using relative permeability curve according to sedimentary microfacies. Waterflooding rule of different pay zone has been studied, and a geological model which uses sedimentary microfacies to act binding force has been built. The reservoir numerical simulation's results show: the geological model can express area heterogeneity of every single-sand and control the area flow regime, the model with a tolerance of less than 17.3%. Constraints with sedimentary microfacies of reservoir numerical simulation can precisely match history with different microfacies, the results fixed quantity of remaining oil for different sedimentary microfacies for different production period and some stages, matching water cut suit with 92.6% and raise 10.0% than normal history matching, simulation numerical number approach to the actual numerical number.