闭式气举的井底压力分析

An Analysis of Bottom Hole Pressure of Closed Gas Lift System.

根据闭式气举井底瞬时压力的特点 ,提出闭式气举的井底压力偏微分方程及其边界条件和初始条件 ,经过求解 ,给出该方程无因次化后的Laplace空间和实空间上的井底压力表达式 ,得出整个气举过程的井底压力。由此 ,对井底压力历史进行拟合分析 ,可以得到地层参数 。

In accordance with bottom hole instantaneous pressure characteristics of closed gas lift system,this pater puts forward a partial differential equation, boundary conditions and initial conditions for bottom hole pressure of closed gas lift system, calculation,the bottom hole pressure expression on Laplace space and true space,after the equation becomes dimensionless,is generated to get the bottom hole pressure in the whole gas lift process. In view of this, the match and analysis to bottom.hole pressure history may get formation parameters,therefore attaining the objective of evalvation the formation.