文南油田高压注水基础机理研究

Study on the Fundamental Mechanism of High-Pressure Water Injection in Wennan Oil Field

文南油田属低渗透、异常高压的复杂断块油气田。对油田高压注水油层粘土膨胀，油层水敏效应，注入水中机械杂质引起的孔道堵塞，注入压力与储层热应力和地应力的变化关系，微裂缝的形成机理及扩展趋势等影响因素进行了大量室内岩心试验、数学模拟计算和矿场实验，得出了量化概念和规律性认识。

Wennan Oil Field belongs to low permeability,abnormal high pressure and complicated fault-block oil/gas field. By a lot of core tests in labratory,simulation calculation and field testing,the au thors research the influence factors of high-pressure water injection to clay swelling and water sensitivity,pore passage being pluged by mechanical admixture in injected water,the influence of injection pressure to reservoir heat stress and ground stress, the forming mechanism and extending trends of microfractures.Quantitative and regular understanding to oil field is got at last