Wellbore Gas-liquid Two-phase Flow Model In Jingbian Gas Field

Jingbian gas field which locates in the middle of the Ordos Basines is an important one of West-East gas transmission project.According to the means of production of these yease,the period of stable production of the gas field has been greatly influenced because of the abnormal pressure loss in the wellbore of some wells and wellbore fluid.So it is very necessary to study the liquid flow pattern and pressure distribution in the wellbore in order to find out some reasonable methods to reduce the abnormal pressure loss and solve the problems of wellbore fluid and the rapid decline of well pressure and production.Firstly,this artice selects the calculation model and the flow pattern identification contracting model,that is suitable to water gas well two-phase flow in wellbore and wellbore flow,and make progress to these models on the basis of VB programming language.Secondly,combing the theorical mehtods and field data,this artice analyses the factors that influence the pressure loss in the wellbore and sensitivity of the factors.Thirdly,according to the gas field's actual situation,some research of the pressure loss in the wellbore of the abnormal well are made.Finally,for the wellbore fluid of water gas well,critical flow model is modified on the basis of previous studies,so the critical flow model is obtain,which is suitable to jingbian gas field,and the sensitive factors of the critical flow model are analysed on the basis of the wellbore pressure software.The production system is optimized on the basic research in all aspects.all kinds of drainage gas recovery technique about wellbore fluid well and exploitation plan for water gas well are researched.Based on the above study,wellbore pressure distribution law and state of flow provide a theoretical basis to judge and know wellbore fluid and solve problems about wellbore pressure and the rapid decline of production.