考虑气体连续携液及液滴直径影响的气井新模型  

Gas wells model of continuous removal of liquids through a new estimation of droplet diameter

作　　者：谭晓华[1] 李晓平[1] 

机构地区：[1]西南石油大学"油气藏地质及开发工程"国家重点实验室,成都610500

出　　处：《水动力学研究与进展（A辑）》2013年第1期41-47,共7页Chinese Journal of Hydrodynamics

基　　金：国家科技重大专项(2009E-0307)资助~~

摘　　要：常用的临界携液模型是通过对井筒中的液滴进行受力分析,再加以经验修正所得到的。凭经验选择临界携液模型判断气井积液,难免出现偏差,且多位学者提出了不同的临界携液模型,其预测结果相差很大。该文通过实例计算比较,发现文献各携液模型对临界携液量的要求并不相同,从而解释了各模型计算的临界携液量相差巨大的原因。基于气流中液滴总表面能与气体紊流动能的相等关系,提出一种考虑气体携液量及其中最大液滴直径对气井临界携液流量影响的新模型,并将新模型的预测结果与四个产水气田气井的现场生产数据进行了比较,结果显示吻合度很高,以此验证了该新模型判别临界携液量的可靠性。The conventional model of critical-removal liquids is gotten by straining analysis of droplets in the wellbore and by empirical adjustment. Some scholars have introduced various models of critical-removal liquids, which are quite different from each other in predictions, the oil field chooses various model to judge the liquid-loading problem by experience, which will inevitably cause deviation. The previous model demands for different liquid removal, and thus gives the reason why critical liquid removal varies a lot from each other. Based on the equality between total surface energy of droplet and turbulent impact of gas, this thesis develops a new model which considers unloading gas flow rate. The model has been compared with field data acquired at four water production gas reservoirs in China and the well conditions can be judged correctly by this model. It also yields a good prediction for critical flow rate of continuous removal of liquids in conjunction with Li Ming＇s model.

关 键 词：液滴直径 临界流速 携液 连续携液模型 

分 类 号：TE312[石油与天然气工程—油气田开发工程]