水平井射孔完井产能预测研究与应用

Study on productivity prediction of horizontal wells with perforation completion and its application

水平井产能预测是进行油藏工程分析和采油工艺设计的基础。针对砂岩油藏射孔完井的水平井,采用半解析法,通过建立井筒单元段上的油藏渗流压力响应模型和井筒流动压力损失模型,将油藏渗流与井筒流动进行耦合,预测射孔完井的水平井产能,经现场实例验证,预测结果与实际情况误差率为5.89%;另外,对于定产的水平井,可确定该产量下的合理生产压差,同时为砂岩油藏完井参数选择和射孔优化设计提供科学的理论依据。

Horizontal well productivity prediction is the basis for reservoir engineering analysis and oil extraction process design.The semi-analytical method is used for perforation completion of horizontal wells in sandstone reservoir,reservoir percolation is coupled with wellbore flow based on setting up a reservoir percolation stress response model and a wellbore flowing pressure loss model are established,so as to predict the productivity of horizontal wells with perforation completion.Through on-site instances verification,the error rate between prediction and actual conditions is 5.89%.Reasonable production pressure difference could be determined with regard to regulated quota of production.And it provides scientific and theoretical basis for the selection of completion parameters of sandstone reservoir and the optimal design of perforation.