疏水缔合聚合物的流度控制能力研究

THE MOBILITY CONTROL CAPACITY OF HYDROPHOBIC ASSOCIATING POLYMER IN HIGH PERMEABILITY POROUS MEDIA

通过研究具有缔合能力的疏水缔合聚合物和无缔合能力的线性高分子流度控制能力,认识到:在高渗透多孔介质中,高钙、镁矿化度水质条件下,低分子量高缔合力的疏水缔合聚合物溶液的流度控制能力比高分子量无缔合能力的聚合物强;在经过机械剪切和多孔介质剪切后,低分子量高缔合力的疏水缔合聚合物建立的阻力系数与线性高分子相当,但低分子量高缔合力的疏水缔合聚合物建立的残余阻力系数较高,能够较好地实现提高高渗透油藏水驱波及体积的目的。低分子量高缔合力的聚合物溶液在高钙、镁矿化度水质条件下,较强缔合作用形成的溶液结构适合渤海油田大排量、高渗透多孔介质条件下的流度控制。为海上油田聚合物驱的发展提供理论技术支持。

The mobility control capacity research of hydrophobic associating polymer and linear polymer without associating capacity suggests that in high permeability porous media, under the condition of high calcium cation and magnesium cation concentration, the mobility control capacity of hydrophobic associating polymer with low molecular weight is better than polymer with high molecular weight and without associating capacity. After mechanical shear and porous media shear, resistance factor build by hydrophobic associating polymer with low molecular weight is almost equal to that of the linear polymer, but the residual resistance factor is higher than that of the latter, so it can be used to improve the water flooding sweeping volume of high permeability reservoir. The conclusion can be drew as follows: under the condition of high calcium cation and magnesium cation concentration, as a result of its solution structure build by associating action, polymer with low molecular weight and associating capacity is fit to the mobility control of high permeability Bohai oil field where the polymer is injected with high flow rate. It offers theoretical and technical support for polymer flooding in offshore oil field.