一种聚合物驱数值模拟物化参数的确定方法

A Method of Determining Physicochemical Parameters of Numerical Simulation for Polymer Flooding

殷代印 李宇恒 周亚洲

YIN Daiyin，LI Yuheng，ZHOU Yazhou

聚合物溶液在油藏中的物化参数与室内实验测得的结果差别较大，将实验结果直接应用于数值模拟中随意性较大，模拟结果可靠性无法保证。针对这一问题，以大庆炼化聚合物（HPAM）为例，模拟了炮眼和近井地带的剪切作用，测定了聚合物溶液的黏度损失，应用物质平衡方法测定了聚合物驱的吸附量，并测定了聚合物驱相对渗透率曲线和残余阻力系数。通过小尺度岩心数值模拟对以上物化参数进行敏感性分析。研究结果表明：实验中测量的聚合物黏浓关系、吸附量和相对渗透率数据能够反映油藏中实际情况，实验中测量的残余阻力系数与实际情况差异较大。通过修正残余阻力系数，小尺度数值模拟拟合较好，能够应用于矿场数值模拟中。图7 表5 参12

There are many differences between physical and chemical parameters of polymer flooding in formation and laboratory experiment results. If the experiment results are applied to the numerical simulation directly，the randomness will be large and the reliability of simulation results will not be guaranteed. Aim at this problem，taking Daqing refining polymer （HPAM）as an example，the viscosity loss of polymer was determined by simulating shear action of the hole and the near well bore area，the adsorbance of polymer flooding was measured by using the material balance method，and the relative permeability curve and the residual resistance coefficient of polymer flooding after shearing was determined. Through the history matching of small scale numerical simulation，the sensitivity of the above physicochemical parameters was analyzed. The study results showed that the measured data of relationship between polymer viscosity and concentration，adsorption capacity and relative permeability could reflect the actual situation in the reservoir，however，the difference between residual resistance coefficient and the actual situation was relatively large. Though revising the residual resistance coefficient，the small scale numerical simulation was in a good coincidence，which can be applied to the numerical simulation of field polymer flooding.

10.19346/j.cnki.1000-4092.2016.04.019