边水油藏水平井水淹影响因素分析

Analysis of the Water Flooding Influencing Factors of Horizontal Well in the Reservoir with Edge Water

河南油田以边水油藏为主,部署的部分水平井投产后含水上升较快,在建立典型地质模型的基础上,运用油藏数值模拟方法,研究了边水油藏水平井水淹的影响因素,包括地质因素和开发因素,并运用灰色关联分析法,对各影响因素进行敏感性分析,识别了各因素对边水油藏水平井水淹的影响程度,得出其排序为:与边水距离>平面非均质性>剩余油分布>产液速度>油水黏度比>射孔段长度>水平井轨迹>垂向非均质性。

Most of the reservoirs in Henan Oilfield have edge water, and therefore the water-cut of a party of horizontal wells quickly rises after putting into production. Based on the establishment of typical geologic models, the flooded influencing factors of horizontal wells in the reservoirs with edge water are studied using reservoir numerical simulation, and the factors include geological factors and development factors. The sensitivity and the influencing degree of the influencing factors are analyzed, and it is shown that the order of their influencing degree from large to small is the distance from edge water, plane heterogeneity, residual oil distribution, liquid producing speed, oil-to-water viscosity ratio, perforation length, horizontal well trajectory, and vertical heterogeneity.