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:孤岛油田由于长期注水开发 ,层内或层间非均质程度明显增强。聚合物溶液注入地层后遇到高渗透带或大孔道时 ,经常发生指进或窜流的现象 ,很快从油井中采出 ,使聚合物驱效果明显变差 ,并造成大量聚合物无效损失。本项目采用注入单体 +交联剂的方法 ,能够有效利用地下大量残留的聚合物溶液 ,提高地下聚合物溶液的粘度 ,堵塞出聚合物孔道 ,改变后续聚合物溶液流向 ,扩大聚合物驱的波及体积 ,提高聚合物驱的效果。
: In Gudao Oilfield, due to the long-term water injection development, the degree of in-layer or inter-layer heterogeneity is obviously enhanced. When the polymer solution is injected into the formation, it encounters the high permeation zone or the large pore channel, the phenomenon of fingering or channeling frequently occurs and the polymer solution is quickly taken out of the oil well to cause obvious deterioration of the polymer flooding effect and cause a large amount of polymer lossless effect . This project uses the method of injecting monomer + crosslinking agent, which can effectively utilize a large amount of residual polymer solution underground to increase the viscosity of the underground polymer solution, plug the polymer pores, change the flow direction of the subsequent polymer solution and expand the polymer flooding Spread volume, improve the polymer flooding effect.