低渗透窄薄砂体油田含水变化规律

Water cut changing regulation and estimation method research in low permeability and narrow thin sand oil field

为了更好地预测低渗透油田水驱含水变化规律,通过数值模拟、理论计算,研究了油层非均质性、原油粘度和含水阶段等地质因素对含水上升规律影响,分析了葡萄花油田开发过程中采取的调整方式、调整措施等开发因素对含水上升规律的影响,采用结构分析法和贡献值法,分析了结构调整以及打加密井、压裂、换泵、堵水、关井等生产措施对控水的作用。建立了基于油量的水驱曲线微分形式含水预测模型。结果表明,与传统公式相比,该模型更能掌握含水随时间变化的详细过程,准确预测含水变化。在高含水期开发中,可以准确预测开发指标变化趋势,对科学制定开发技术政策、指导油田合理开发有一定的参考价值。

For betterly predicting low permeate oil-field water cut changing regulation,by numerical simulation and theoretic calculation,studied and analyzed the effect on water cut escalating law,the geological factors are heterogeneity,crude oil viscosity,water cut phase etc and the exploiture factors are adjustment method and measure.By structure analysis and contribution value method,analyzed the structure adjustment and the production measures,infilling well,fracturing,changing pump,water plugging,shut-in,influence of controlling water.Established the water prediction model,which is the water-flooding curve differential formula based on oil.Compared with the traditional formula,the new can even control the water cut detailed process changing with time,more accurately predict variety of water cut.In high water cut oil field,we can accurately predict estimate development index changing trend,make scientificdevelopment technique policy,instruct oil-field reasonable development.