天然气井空井压井拟瞬态设计理论——第一次井底压力等于地层压力

Design Theory of Quasi-Transient state of Killing Wen in Empty Hole Filling with Natural Gas——The First Bottom Pressure is Equal to the Formation Pressure

本文将地层、井筒、井口考虑成一个相互制约,相互影响的连通体系。利用地层气体渗流数学模型,建立了天然气井空井压井的拟瞬态设计理论,解决空井压井的泥浆密度、排量、用量及立管压力、套压等参数的计算问题和施工控制问题。

This paper considers that formation, borehole and well head constitute a connective system restricting and influencing each other. Using the mathematical model of formation gas seepage flow, the design theory of quasi-transient state of killing well in empty holes filling with natural gas is set up, and the parameter calculations of the density pump capacity, volume of the mud and stand pipe pressure as well as casing pressure etc and the problems of operation control are resolved.