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随着油田开发进入中高含水期,长期注水形成的无效循环场将严重影响注水驱油效率。为更好地挖潜剩余油,提高原油采收率,应用数值模拟方法对松辽盆地北二西东块二类油层先导试验区的剩余油和水流优势通道进行模拟,优选出深部液流转向的6注12采井组及萨Ⅱ13-16主力层系,并设计出高强缓膨颗粒、弱凝胶、强凝胶三段塞式组合开发方式。利用大庆油田北二西区块的地层水进行室内实验优化配方,对增油和降水效果进行预测。结果表明北二西东块二类油层深部液流转向设计方案是可行的。
With the development of oilfields entering the middle-high water cut stage, the ineffective circulation field formed by long-term water injection will seriously affect the water flooding efficiency. In order to better tap the residual oil and enhance the recovery rate of crude oil, numerical simulation is used to simulate the residual oil and water flow dominant channel of the second type reservoir in the North Second West-East block of Songliao Basin. 6 Note 12 well group and Sa Ⅱ 13-16 main strata, and designed high-strength slow-swelling particles, weak gel, strong gel three-segment plug combination of development. Based on the laboratory experiment of formation water in the formation of North Second West Block in Daqing Oilfield, the effect of increasing oil and precipitation was predicted. The results show that the deep second flow direction design scheme of the second type reservoir in the west of North Second West is feasible.