存在反凝析液的凝析气井试井数学模型及其解释方法  

Mathematical model and interpretation method for the test of a condensation gas well with retrograde condensation liquid

作　　者：李笑萍[1] 程博[2] 

机构地区：[1]大庆石油学院数学系,黑龙江安达151400 [2]中国地质大学地球科学与资源学院,北京100083

出　　处：《大庆石油学院学报》2001年第4期26-28,共3页Journal of Daqing Petroleum Institute

基　　金：国家"九五"科技攻关项目 ( 97-0 5 -0 6 -0 3 -0 3)

摘　　要：根据凝析气在多孔介质中渗流时的相变特征 ,推导出凝析油 -气渗流方程 ,并引入凝析油 -气两相拟压力函数使渗流方程线性化、实用化 ;建立了井筒与地层内存在反凝析现象的凝析气井试井数学模型 ,确立了凝析气井压力恢复试井资料的解释方法 ;在实测资料的试井解释过程中 ,首先根据凝析油 -气的流体相态和凝析气田相对渗透率计算出气井压力恢复所对应的拟压力 ,再对拟压力做半对数、双对数分析 ,可计算出气藏渗透率、地层系数。According to the phase transition character in condensations flow through porous media, this paper establishes an equation of seepage flow of condensation oil\|gas. Two phase pseudopressure function of condensation oil\|gas was inducted to make linearization and practicality of seepage equations. When there is a retrograde condensation reservoir in the wellbore and formations, a mathematical model of condensation gas well test was developed. And a method was established to interpret pressure build\|up well test data of a condensation gas well. During well test interpretation of the measured data, in terms of liquid phase data of condensation oil\|gas and relative permeability information of condensation gas reservoir, pseudopressure data was calculated corresponding gas well pressure build\|up data. Permeability, formation capacity, skin factor can be calculated by semilog analysis and log\|log analysis of pseudopressure data.

关 键 词：凝析气渗流 井筒反凝析 凝析气井 试井 数学模型 解释方法 

分 类 号：TE373[石油与天然气工程—油气田开发工程]