拟均匀流态下气井井筒压力分布特征

Pressure Distribution in the Gas Wellbore Under the Pseudo-Steady State Flow.

以井筒动力学为基础 ,系统地研究了拟均匀流态下气井井筒流体在关井、开井状态下 ,重力、摩擦力、动量、温度及含水对井筒压力分布的影响 ;确立了井口压力与井底压力的关系 ,研究了井筒流体密度的变化规律 ,并用建立的井口压力与井底压力的关系对长庆气田 2 0余口井的静压、流压值进行了推算 ,其值与实测结果接近。该研究成果的应用减少了测压作业次数 。

Based on the wellbore hydraulics,the pressure distribution in the wellbore under the pseudo steady state flow during shutting and opening the well has been studied in this paper.The effect factors considered in the study are gravity,friction,momentum,temperature and water content.The relationship between the well head pressure and wellbore pressure is established.The fluid density distribution in the wellbore is determined.By using our relationship,the state pressure and flow pressure values are got in more than 20 wells.The results show that our calculated data are agreed with the field test data.This study is useful in minimizing the test operation times.