基于井筒携液实验的临界携液流量预测方法

A critical liquid-carrying flow prediction method based on wellbore liquidcarrying experiment

Belfroid模型为现场应用较多的临界携液流量预测模型,针对该公式推导过程中对部分参数存在一定的假设条件从而可能影响预测结果准确性的问题,利用倾斜井筒携液实验装置对气井临界携液流量及其影响因素进行了分析,根据实验测试数据,对Belfroid模型进行了修正,并给出了适用条件。利用修正的Belfroid模型预测了东海部分气井的积液状况,预测结果得到了现场实测数据的证实,验证了修正模型的可靠性和准确性。

The Belfroid model is a well-known and commonly used liquid-carrying flow prediction model. The critical liquidcarrying flow rate and its influencing factors of gas wells were analyzed using the deviated wellbore liquid-carrying experimental device to address the problem that some parameters have certain assumptions in the process of derivation of this formula,which may affect the accuracy of the prediction results. The Belfroid model was modified and the applicable conditions were provided based on the experimental test data. The fluid accumulation in some gas wells in the East China Sea was predicted using a modified Belfroid model.The reliability and accuracy of the modified model were evaluated by field-measured data,which confirmed the prediction results.