有效采液-平均含水率评价油藏开发潜力

Evaluate production potential using effective mass production and average water cut

运用油藏工程方法评价油藏开发潜力发现,无功采液造成水驱开发油藏标定可采储量偏低、计算综合含水率偏高,高液量井影响综合含水率突出,而在实际生产中低液量且低含水率的井贡献很大。平均含水率与综合含水率差值越大,反映开发潜力越大。对于整体处于高含水期开发的油田,复活平均含水率概念更有意义。同样是高含水油田,由于液量、油量尤其不同含水率分级井比例差异,在实质上其开发潜力可能差别较大。无论综合含水率还是平均含水率,只能部分反映油藏开发特征,油藏评价中应进行综合评价。利用有效采液-平均含水率方法评价孤东油田开发潜力,得出了比较乐观的认识,而且得到矿场实践证实,深化了对油藏开发规律的认识。

It is found when evaluating production potential using reservoir engineering method that,reactive mass production can cause low calibrated recoverable reserve,high calculated composite water cut and conspicuous influence on composite water cut in high liquid production wells in reservoirs of water flooding.However in actual production,the wells of low mass production and low water cut had contributed a lot.The greater the difference between the average and composite water cuts is,the bigger the production potential is.For an oilfield being in high water cut stage as a whole,the concept of average water cut is rather meaningful.The production potential of oilfields with high water cut may differ greatly due to the differences in mass production,crude output,especially the proportion of wells with different water cuts.Both composite and average water cuts only partially reflect reservoir development status,comprehensive evaluation is necessary for reservoir evaluation.The production potential of Gudong Oilfield was optimistic when evaluated by the method of effective mass production and average water cut,and has been proved by field production,thus deepening the understanding on reservoir development.