聚合物驱数值模拟渗流参数的测定研究

PARAMETERS OF POLYMER SOLUTION FLOWN THROUGH POROUS MEDIA FOR NUMERICAL SIMULATION OF POLYMER FLOODING AND THEIR LABORATORY DETERMINATION

本文采用部分水解聚丙烯酰胺,在大庆油田厚层试验区的天然岩心上,建立了聚合物驱数值模拟渗流参数的测定方法,研究了渗透率、注入速度、温度、分子量和矿化度对渗流参数的影响,初步建立了R_K_(max)、b_p与渗透率、线性推进速度和温度的关系式,从而充实和完善了原聚合物驱模型,为厚层聚合物驱矿场试验提供了数值模拟参数。

Three parameters of polymer solution flown through porous media are needed in the numerical simulation of polymer flooding by using model VIPCHEM, These are maximal coefficient of permeability decrease, R_K_(max);changing rate of R_K, b_p; and nonaccessible volume, XIPV.The methods for determining these parameters are established on the HPAM solution flown through natural cores from the thick pay polymer flooding pilot in Daqing Oil Fields.The studies on effect of permeability, injection rate, and temperature on R_K_(max) and b_p have led to some improved approximate relationships for the two parameters. The effect of polymer molecular weight and salinity is also studied. The suggested methods have been used to provide the parameters needed in numerical simulation of above mentioned polymer flooding pilot.