致密油储层不同储渗模式下生产特征研究

针对致密油储层通常会发育不同尺度的天然裂缝的地质特点，依据天然裂缝发育程度以及基质的物性好坏， 将致密油储层划分为孔隙型、裂缝孔隙型、孔隙裂缝型及裂缝型。开展了不同储层类型下的生产特征研究，获得了 对不同储渗模式下油井生产规律特征的认识。主要通过Eclipse 数值模拟软件，建立符合不同储渗模式特点的模型， 通过计算对比分析其特点，研究证实裂缝是单井初期高产的必要条件，而具有较好储集能力的基质则是获得较高累产 的必要条件。研究结果对致密油开发部署具有非常重要的意义。

An Analysis on Performance Characteristics of the Tight Oil Reservoir

Generally，there are natural fractures of varied sizes distributed in the tight oil reservoir. According to the size and density of fractures and the porosity and permeability of matrix，the tight oil reservoirs could be classified into 4 types：the Porous Type，the Fracture-porous type，the Porous-fracture type and the Fracture-type. This paper is mainly focused on the performance characteristics analysis of the different types. The performance curves of different types exhibit different decline trends. Applying Eclipse software into the tight oil reservoir simulation，we built 4 different models to study their performance. Based on the results analysis，the fracture permeability and matrix porosity is proved to be very key parameters to the initial production rate and the decline rate. Thus，fractures are the necessary conditions to get a high initial production rate and the matrix with considerable storage capacity is the necessary conditions to get a high cumulative production.