油藏地质模型数据体粗化技术

Scaling method for full-scale reservoir geological models

在油藏描述过程中 ,由地震解释出的三维地质模型一般产生几十万至几百万个网格数据体 ,由于目前计算机水平的限制和工作效率及费用等方面的考虑 ,需要对该数据体进行合理的粗化。用严格满足渗流流动规律的调和平均方法处理相邻网络之间的渗透率 ,这样求解渗流力学方程组得到的结果与一维理论解完全相符 ;对辽河油田某一大型油藏进行粗化后进行数值模拟 ,结果表明全油藏累积产油量、累积产水量的拟合误差均比较理想。

After geological interpretation, three dimensional geological models often have millions of grid points. Restricted computation speed, simulation efficiency and cost mean that geological models can not be directly used for numerical simulation and must be scaled. The blending mean method combined with Darcy's law was used to deal with the permeabilities of adjacent nodes. A group of coupled equations for percolating flow through porous media was established and the solutions agree well with one dimensional theoretical results. Application of this method to a full scale reservoir, a three dimensional (312×124×6) numerical simulation of the Liaohe Oil Field, accurately reflects the percolating fluid characteristics.