预测倾斜气井临界携液流量新模型.

At present, most of the widely used critical liquid-carrying flow prediction models are taking vertical wells as research object, and as we do not consider the effect of deviation angle on liquid-carrying, a large deviation was caused between the predicted value of critical liquid-carrying flow and the actual situation in inclined gas wells. In order to judge whether there is a problem of fluid loading in inclined gas wells, based on the analysis of liquid-droplet force equilibrium theory, a new model for predicting the critical liquid-carrying flow of gas wells was established on the basis of considering the effect of droplet deformation and well deviation angle. According to the energy conservation equation, we deduced the functional formula between critical Weber number and droplet deformation parameters. Based on the hypothesis of ellipsoidal droplet, and considering the influence of droplet internal flow and droplet deformation, the drag coefficient of the ellipsoidal droplet is taken down by 15% of the calculation results for Shao Mingwang model. Compared with Turner model, Li Min model, Wang Zhibin model, Yang Wenming model and Belfroid model, it is found that the new model has a higher accuracy, with an increase of 14.49%~16.80% in calculation accuracy. It can correctly judge the liquid accumulation in gas wells, which is consistent with the actual situation in the field, and can effectively guide the safe and rational production of gas fields. [ABSTRACT FROM AUTHOR]