孤岛油田三元复合驱现场试验

孤岛油田西区已地入特高含水期（平均含水93．95），采出程度23．97％，目前开发效果较差，为进一步提高其采收率。在数值模拟和室内驱替试验的基础上，进行了三元复合驱现场试验，采取了层系调整，减少上层系对试验区的影响，保持合理地层能量和及时放大生产压差等措施，结果表明，出单一聚合物驱更好的增油效果，同时见聚率较低，高渗层得到有效封堵，吸水剖面得到改善，开发效果明显变好，取得了良好的经济效益。

Ternary Combinationdrive Test in Gudao Oilf ield

As the west part of Gudao Oilfield is at extremely high water bearing stage(average water cut is 93 9%),the recovery percent is 23 97% and the production efficiency is lower In order to further enhance the oil recovery, a ternary combination drive test is performed based on the numerical simulation and laboratory displacement test The processes of adjusting layer series, reducing the effect of upper zone on the test region, keeping rational reservoir energy and increasing the producing differential pressure in time are implemented The result shows that the effect of oil production enhancement is better than that of a single polymer flooding,at the same time the rate of polymer breakthrough is lower ,high permeability formation is plugged off effectively, injectivity profile is improved, development efficiency is obviously promoted, thus good economic efficiency is achieved