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该研究以异常压力气藏物质平衡方程的近似表达式的原理、推导和应用为基础。特别地,其近似方程可由异常压力情况下的精确物质平衡方程直接推导得到。已经证明,在压力异常的干气藏中,二项式累积产量关系式[式(2)]是精确物质平衡方程的高精度近似表达式。式(2)不仅适用于标准模型,而且也用在数据分析上[例如,用式(2)来制作一套分析图版、绘图函数、样板曲线等等]。通常考虑ω为关于Gp的线性函数的情况(假设ω是常数)——得到一个p/z关于Gp的三次方的表达式。在本次研究中,得到了以下新结论:①用于异常压力气藏物质平衡方程的二项式累积产能模型;②一组基于p/z-G2p物质平衡模型的6个绘图函数;③一组校正分析过程的4条ω-Gp动态分析曲线;④基于新p/z-Gp2物质平衡模型的pD[=(pi/zi-p/z)/pi/zi]与GpD[=Gp/G]的新特征曲线。
The study is based on the principle, derivation and application of the approximate expression of the material balance equation for abnormal gas reservoirs. In particular, its approximate equation can be derived directly from the exact mass balance equation for abnormal pressures. It has been shown that the binomial cumulative yield relationship [Equation (2)] is a high-precision approximate expression of the exact mass balance equation for dry gas reservoirs with abnormal pressure. Formula (2) applies not only to the standard model, but also to data analysis [for example, using (2) to make a set of analysis plates, plotting functions, template curves, etc.]. It is common to consider ω as a linear function of Gp (assuming that ω is a constant) - to obtain a p / z expression for the power of Gp. In this study, the following new conclusions are obtained: ① binomial cumulative productivity model for the material balance equation of abnormal pressure gas reservoirs; ② a set of 6 mapping functions based on the p / z-G2p material balance model; GpD [= Gp / G (p / zi-p / z) / pi / zi] based on the new p / z-Gp2 mass balance model. ] Of the new characteristic curve.