三元复合体系黏度场分布模拟研究

The Simulation Research of Viscosity Distribution of Alkali-surfactant-polymer(ASP)System

准确预测地层黏度分布情况,将为油田中后期的开发注入方式优化提供科学依据。开展长管岩心物理模拟试验,检测不同PV数(时间)、不同采样点(井距)采出微小液滴的黏度,滴定采出液化学剂质量浓度,得到不同时机化学剂质量浓度变化规律,给出化学剂运移速度关系,计算出色谱分离引起的黏度场分布;实际黏度与色谱分离黏度差值为油水乳化对黏度贡献,通过不同乳化程度、不同含水条件下乳化引起的黏度,模拟给出地下乳化程度分布场。

Accurate prediction of viscosity distribution would provide a scientific basis for the optimization of waterflooding at the mid-late stage of oilfield development.The long tube core physical simulation experiment was performed,including the detection and titration of viscosity and agent concentration of different PV numbers(time)at different sampling points(well spacing).The rules of chemical agent concentration variations in different times and relations of migration velocity of the chemical agent were given,and then the viscosity field distribution induced by chromatographic separation was calculated.The difference of actual viscosity and viscosity caused by chromatographic separation is the contribution of oil-water emulsification to viscosity.By using the viscosity induced by the emulsion and water-cut conditions at different levels,the simulation indicates the distribution field of underground emulsification extent.