注水采油油藏流场数值模拟

Numerical Simulation of Water Injection Oil Recovery Flow Field of Oil Deposit

目前大部分油田已进入高含水开发期,注水量迅速增加,提高和改进油田地面注水系统高效平稳运行是油田注水生产过程中的重要任务之一,为此有必要对采油过程中油藏中油水移动分布规律进行研究。对注水采油进行二维数值模拟,分析了在采油过程中油藏平面范围内油水移动分布规律。研究结果表明:在模拟平面内从开采到流场稳定水在油藏中的分布形状先后经过圆形、不规则椭圆、以三口油井为顶点的不规则图形,油在油藏中的分布形状为总模拟区域的图形中减去水的分布图形即圆形、不规则椭圆、以三口井为顶点的不规则图形后所得到的图形;加压可提高油的驱赶范围但其效果随着加压次数的增加而减小;模拟范围内存在以三口油井为顶点的近似三角形的等压区,此区域在整个模拟过程稳定后保持不变。

Because of Most of the oil fields have come into the high water content exploitation period, and the water injection rate increased rapidly. So to improve and meliorate the efficiency of oil field surface water injection system has become one of the important tasks in the oil field water production process. It is necessary to study the distribution rules of oil and water＇s movement in the oil extraction process of oil deposit. Two-dimensional numerical simulation to water injection of oil extraction was maole and the regularities of distribution of water and oil was analyzed in the flat surface boundary during the process of oil extraction. This result of the study shows that at the simulation of flat surface boundary from exploitation to flow field, the distribution of the shape of water stability in the oil deposit passed through round, irregular ellipse, and topped with three oil wells like an irregular patterning. Oil distribution of the shape in the oil deposit was the range of total simulation minus water. Although stress can improve the range of oil＇s flushing out, the effect would be reduced by times of pressure strengthen. There is a constant cabin altitude state which is similar to a triangle and topped with three oil wells in simulation range, and this field keeps the same after the whole simulation process is stable.