稠油底水油藏不同井型开发特征分析及应用

Production characteristic analysis and application of different well patterns in heavyoil reservoir with bottom water

Q油田为地质构造平缓,辫状河沉积的稠油底水油藏,主要由水平井和定向井两种井型开采。通过对比分析两种井型开发特征,发现相对于定向井,水平井采油指数更高,无水采油期更长,含水上升更慢,累产油也更高。引入解析产能计算模型进行产能计算,分析水平井含水上升慢的机理,运用甲型水驱曲线法预测水驱储量和累产油,理论分析结果跟实际生产状况一致。水平井开采底水油藏效果更好,对稠油底水油藏的开发策略调整具有指导意义。

The Q oilfield has low structure,braided-river sediments,heavy oil and bottom water. It is developed by horizontal wells and directional wells. Comparing to the directional wells,horizontal wells have higher productivity,longer water free production,slower water cut elevation,more cumulative oil. Based on the analytical productivity model,the mechanism of water cut rising and the forecast method of water drive curve type A,it is found the theoretical analysis results are consistent with the actual production conditions. The development effect of horizontal wells is better and it is guiding significance for the adjustment strategy of heavy oil bottom water reservoir.