摘要
采用岩心驱替实验方法研究了部分水解聚丙烯酰胺与柠檬酸铝形成的交联聚合物溶液在均质岩心和非均质岩心中的驱油效果。在气测渗透率为 1.5 μm2 的均质岩心中 ,利用交联聚合物溶液驱油 ,可以在水驱的基础上提高采收率 15 .5 % ,在聚合物驱的基础上提高采收率 4 .4个百分点 ;在渗透率变异系数为 0 .72的非均质岩心中 ,交联聚合物溶液驱油可以在水驱的基础上提高采收率 12 .7% ,在聚合物驱后再利用交联聚合物驱油 ,还能提高采收率 3.7个百分点。在非均质岩心中 ,交联聚合物溶液的驱油机理是 :该溶液先在大孔道中吸附和滞留 ,以提高流动阻力 ,然后逐步发生液流改向 ,使后续注入流体转向低渗透层 ,从而提高采收率。
The oil displacement efficiency of linked polymer solution (LPS) formulated with aluminium citrate and partially hydrolyzed polyacrylamide was tested by means of core segments. The results indicate that for the homogeneous core with a permeability of 1.5 μm\+2, LPS flooding following water flooding can increase oil recovery by 15.5 percent, and LPS flooding following polymer flooding can increase oil recovery by 4.4 percent. For the heterogeneous core with a permeability variation parameter of 0.72, LPS flooding following water flooding can increase oil recovery by 12.7 percent, and LPS flooding following polymer flooding can increase oil recovery by 3.7 percent. For the heterogeneous core, the linked polymer solution is adsorbed and detained in the pore throat of core so as to gradually increase the flow resistance in pores, and the late injected solution can flow into the low-permeability reservoir. LPS is able to increase oil recovery efficiently.
出处
《石油大学学报（自然科学版）》
CSCD
北大核心
2003年第4期113-115,共3页
Journal of the University of Petroleum,China(Edition of Natural Science)
基金
石油大学重质油加工国家重点实验室开放基金资助 (2 0 0 0 13 )
