黄河南地区无能量补充井提高采收率研究

The Study to Improve the Recovery of the Reservoirs in Additional wells Without Energy Supply

复杂小断块油藏中 ,由于有些断块过小 ,油藏储量仅由单井控制 ,加之断层封闭、无边、底水或边、底水不活跃等原因 ,油藏在开发中得不到有效的能量补给 ,致使开发效果极差 ,经济效益低下。单井注水吞吐开发模式一方面利用油层的亲水性、发挥毛管力吸水排油的作用实现水驱 ,一方面补充地层能量 ,恢复地层压力 ,实现人工补充能量。通过多周期的注采开发 ,逐渐扩大水驱波及半径、提高驱油效率 ,从而提高无能量补充井的采收率。该方法在黄河南地区各油田实际运用取得了明显效果 ,加之实施简单易行 ,为黄河南地区各油田提高占比重较大的无能量补充井的采收率提出了一个良好的解决办法 。

The areas of some complicated small fault-block reservoirs are so small that reserves are only controlled by single well.Reservoirs cannot gain effective energy supply during development stage.Because faults are closed,there is not side water or bottom water,or side water and bottom water is not active,the development efficiency is very low. The injcting and picking model by single well,on one hand,supply stratum energy,resume stratum pressure;on the other hand,improve recovery by period development.The method was used in the south of Yellow River zone,and the result is wonderful.The oilfields in the south of the river have many such kinds of well that cannot gain effective energy supply,The injecting and picking model by single well can solve the problem wells.The other similar reservoirs can refer to the method.\;