摘要
在根据气井井口压力计算井底压力的方法中,平均温度、平均偏差系数计算方法把全井筒的温度,天然气偏差系数视为常数,从理论上来讲不够精确,而按Cullender-Smith方法计算时,是用简化梯形积分即辛卜生积分,比较繁琐。由于手算时,每次都要计算各种参数。文章从纯气柱井底压力的计算公式出发,严格地推导出一种新的表达式,并对式中积分给出精确的解析解,大大简化了计算步骤。
During calculating the bottom-hole pressure of gas well based on the wellhead pressure, the entire wellbore temperature and gas deviation factor were considered as constant, so average temperature and average variation coefficient were used as calculation parameters, but which is not precise enough in theory. While calculation with Cullender-Smith method is to use simplified trapezoidal integration, the calculation is more complicated because every parameters must be calculated. In this paper, starting from the calculation formula of pure gas column bottom-hole pressure, a new expression was strictly derived out, and the exact analytical solution was gained, which can greatly simplify the calculation procedure.
出处
《辽宁化工》
CAS
2014年第2期218-219,共2页
Liaoning Chemical Industry
关键词
气井
井底压力
垂直流动
积分变换
解析法
gas well
bottom-hole pressure
vertical gas flow
integral transform
analysis method
