裂缝性油藏离散裂缝网络模型与数值模拟

离散裂缝网络模型由于能更好地表征裂缝性储层的非均质性而成为研究热点。将多点地质统计学中的FILTERSIM方法引入到离散裂缝网络建模中，克服了Monte-Carlo方法的不足，并为后续的渗流数值模拟提供裂缝网络模型。基于油水两相渗流模型，推导了油水两相饱和度有限元数值解格式，结合建立的裂缝网络模型，研究了一注一采井的水驱油动态过程和含水率上升规律。研究表明，离散裂缝网络模型与均质模型相比，由于存在裂缝网络，注入水沿着裂缝网络窜进，导致采油井过早地见水。当采油井见水以后，两种模型的含水率上升规律一致。

Discrete Fracture Network Modeling and Numerical Simulation of Fractured Reservoirs

Discrete fracture network models have become the focus of much research owing to their ability to better characterize the non-homogeneity of fractured reservoirs. The FILTERSIM multi-point geostatistical method was introduced into the discrete fracture network model to overcome the deficiencies of the Monte Carlo method and to provide a fracture network model for the subsequent numerical simulation of the flow. Based on the oil-water two-phase flow model, the finite-element numerical solution of the degree of oil-water two-phase saturation was derived. Taken together with the constructed fracture network model, the dynamic process of the oil displacement by water and pattern of moisture content increase during single-well injections were studied. The study showed that compared with the homogeneous model, injection of water through the channels of the fracture network in the discrete fracture network model led to the premature emergence of water from oil wells. After the emergence of water from the oil well, the two models exhibited consistent patterns of water cut increase.