弱凝胶残余阻力系数的测定及修正

Measurement and Modification of Weak Gel Residual Resistance Factor

为了确定港东油田一区六断块弱凝胶调驱数值模拟所需要的残余阻力系数,采取了物理模拟手段,首先制作不同渗透率的填砂管模型,通过物理模拟手段初步测定弱凝胶的残余阻力系数。然后建立填砂管的数值模型,通过数值模拟手段拟合试验动态,修正残余阻力系数。最后建立了弱凝胶残余阻力系数与渗透率之间的关系。研究成果为实际区块的弱凝胶调驱数值模拟提供了较为可靠的残余阻力系数。

In order to determine the weak gel treated residual resistance factor for reservoir numerical simulation of Fault Block 6 in Region 1 of Gangdong Oilfield,the combination of physical simulation and numerical simulation was employed. The weak gel residual resistance factor was measured first by means of physical simulation for water flooding and weak gel treatment through sand pack. Then the modification of the factor was achieved through history match of the physical simulation performance. The relationship between weak gel residual resistance factor and formation permeability of the target block was obtained,which could be used to calculate the residual resistance factor corresponding to any permeability. The research result provides more reliable residual resistance factors for the reservoir numerical simulation of weak gel treatment in the target block.