疏水缔合聚合物三元复合体系流度控制能力随运移的变化规律

Variation Law on the Mobility Control Ability of Hydrophobic Associated Polymer Based ASP System during Migration

赵凤兰 马云飞 王 潇 侯吉瑞 吴 凡 尚丹森

ZHAO Fenglan MAYunfei WANG Xiao HOU Jirui WU Fan SHANG Dansen

为了揭示疏水缔合聚合物三元复合体系在多孔介质长距离运移过程中流度控制能力的变化规律， 采用自主设计研制的 30 m长的物理填砂模型进行疏水缔合聚合物三元复合体系 （简称缔合 ASP三元体系） 室内驱油实验， 并与同等条件下常规三元复合体系 （常规 ASP三元体系） 的驱油效果作对比， 分析流度控制能力随运移距离的变化情况。研究结果表明， 在平均渗透率Kg=872×10-3μm2 的物理填砂模型中， 缔合 ASP三元体系在缔合状态下注入能力较差， 在长距离运移条件下对深部的流度控制能力不如常规 ASP三元体系。缔合 ASP三元体系在近井地带的表观黏度测定值较高， 但压力提高效果反而较弱， 这是由于缔合聚合物分子间所形成的空间结构在孔喉中难以保持。二类油层条件下， 注入的驱替相的黏度至少需要达到 23 mPa· s才能对小孔道中的流体产生有效波及， 本实验条件下三元段塞维持黏度该值的距离仅为注采井距的 40%左右。图 6表2参 10

In order to study the variation law on the mobility control ability of hydrophobic associated polymer（HAP）based ASP flooding during long distance migration in porous media，a physical sand-packed model of 30 meters long with the average gas permeability of 872×10-3μm2 was set up for oil displacement experiments. The mobility control ability of HAP based ASP system was analyzed as compared with conventional ASP flooding. The results showed that the HAP based ASP system had difficulty in injection and lower mobility control ability than conventional ASP system during long distance migration. The HAP based ASP system had higher measured values of viscosity and lower pressure near inlet，which indicated that the net structure formed by association could not keep in the narrow space of pore. In second type oil layers，the minimum of the viscosity of displacement agent was 23 mPa·s for the sweep of smaller pores. The effective migration distance of ASP system was around 40% of the well spacing under experiment conditions，where the viscosity was not lower than 23 mPa ·s.

10.19346./j.cnki.1000-4092.2017.03.026