裂缝性低渗透油藏注水开发实验研究

Experimental Research on Water Injection Development of Fractured Low Permeability Reservoirs

摘要: 在我国石油工业的版图里，裂缝性低渗透油藏占据着举足轻重的位置。对石油部门而言，如何达成这类油藏的经济高效开发，已然成为亟待攻克的关键课题。相比于常规储层，裂缝性低渗透储层中油水两相的渗流规律呈现出更为复杂的特性，并且其开采机理也有着显著的不同。但相关研究体系不够完善，本文根据矿场岩心性质筛选契合实验要求的造缝方法进行人工造缝，制备裂缝性低渗透岩心，并对其基本物性参数进行测量，开展一维水驱实验，通过改变围压分析裂缝性低渗透储层注水开采过程中裂缝宽度对开采效果的影响，为裂缝性低渗透油藏注水开发提供参考。

Abstract: In the landscape of China’s petroleum industry, fractured low-permeability reservoirs hold a pivotal position. For the petroleum sector, achieving the economically efficient development of such reservoirs has become a critical challenge that urgently needs to be addressed. Compared to conventional reservoirs, the flow patterns of oil and water in fractured low-permeability reservoirs exhibit more complex characteristics, and the mechanisms of extraction are also significantly different. However, the research system in this area is not yet sufficiently developed. This paper, based on the properties of field cores, selects suitable fracture creation methods that meet experimental requirements to artificially create fractures, thereby preparing fractured low-permeability cores. The basic physical parameters of these cores are then measured, and one-dimensional water-flooding experiments are conducted. By altering the confining pressure, the influence of fracture width on the effectiveness of water-flooding in fractured low-permeability reservoirs is analyzed, providing a reference for the water-flooding development of such reservoirs.