基于可压缩流体不稳定流动理论及地层流体渗流理论，建立了气体钻井过程中井筒瞬态流动的数学模型。
Based on the theory of unsteady flow of compressible fluid and the seepage theory of formation fluid, the mathematical model of the gas transient flow in the wellbore has been established.
避免了传统时域积分方程在后期响应求解的不稳定性，提高了瞬态响应求解的效率。
The present method avoids tedious computations in conventional TDIE, the efficiency of solving the transient response is speed up greatly.
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