非环状流气井两相流机理模型  

Two-phase flow model for non-annular flow in gas wells

作　　者：刘通[1] 任桂蓉 赵容怀 

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,四川成都610500 [2]中国石油塔里木油田分公司技术发展处,新疆库尔勒841000

出　　处：《岩性油气藏》2013年第6期103-106,132,共5页Lithologic Reservoirs

基　　金：国家自然科学基金项目"产水气井井下节流携液机理研究"(编号:51104125)资助

摘　　要：针对目前气井两相流模型难以正确预测非环状流气井井筒压降和微观流动参数的问题,建立了非环状流气井两相流机理模型。首先基于液滴受力平衡和液膜桥接原理,提出了气井非环状流流型判别方法;其次根据非环状流中泰勒泡和液塞交替上升的流动特征,建立了单元体压降模型,封闭关系式中泰勒泡上升速度基于漂移模型得到,液塞含气率由Schmidt实验数据得到。38口非环状流气井数据评价表明,非环状流模型预测压降的相对误差仅为-1.464%。该模型能够精细描述非环状流气井多个微观参数,且计算简单。The current two-phase flow models developed for gas wells cannot be used to correctly predict the pressure losses and micro-flow-parameters for non-annular flow in gas wells. This paper established a two-phase flow model for non-annular flow in gas wells. Firstly, a non-annular flow-pattern prediction model was proposed based on the force balance of liquid droplet and the blockage of liquid film. Then a unit-cell model for pressure drop was developed according to the intermittent flow characteristics of non-annular flow. The bubble rise velocity was obtained based on drift-flux model, and the void fraction in liquid slug was obtained from the Schmidt experimental data. The evaluation data from 38 non-annular-flow gas wells show that the relative error of this model is only -1.464%. Application examples show that the model can calculate the detailed flow parameters.

关 键 词：单元体模型 泰勒泡长度 非环状流 压降 两相流 气井 

分 类 号：TE375[石油与天然气工程—油气田开发工程]