定向井携液临界流量模型对比研究

定向井井筒结构复杂,井筒内气流携液困难。利用定向井模拟实验装置对定向井携液临界流量进行测试,将实验结果与液滴模型、Belfroid携液模型、液膜模型进行对比,对比结果表明:理论模型计算出的携液临界流量值比实验测试值大,Belfroid携液模型计算的携液临界流量值随井筒倾角变化趋势与实验测试结果一致。结合实验测试数据,对Belfroid携液模型中的携液临界流速公式系数进行修正,得到定向井携液临界流量修正模型。利用修正模型诊断的气藏定向井积液情况,其诊断结果与采取回声仪诊断液面的结果一致,证明定向井携液临界流量修正模型能较好的预测井底积液情况。

RESEARCH ON THE MODEL OF LIQUID CARRYING CRITICAL FLOW RATE OF DIRECTIONAL WELL

Structure of directional well bore is complex,It is difficult to carry liquid by gas in well bore.Liquid carrying critical flow rate of directional well is tested by using the simulation device of directional well.Experimental results are cvnpared with the droplet model,the film model and the Belfroid liquid carrying model,results show that the liquid carrying critical flow rate of theoretical model are bigger than liquid carrying critical flow rate of experimental results and the liquid carrying critical flow rate of Belfroid liquid carrying model follows the same trends as the experimental results.Revising the Belfroid liquid carrying model combined with experimental results.Using the revised liquid carrying model to diagnose fluidifying of directiond well,the diagnosis result is as the same as result by using echometer to diagnose.This provides that fluidifying of directional well can be forecast by the revised liquid carrying model.