能量权重法计算气藏平均地层压力

Energy Weighing Method to Calculate the Average Pressure of Gas Reservoir

气藏平均地层压力是气藏动态分析中不可缺少的资料。由于生产状况和气藏本身特性决定采用关闭所有生产井后测压已经不太现实。目前,气藏平均地层压力的计算方法主要为各种加权法,这些方法只考虑了生产井供给区内的地层压力,而没有考虑气井非控制区内压力对气藏平均地层压力的影响,导致误差的产生。能量权重系数法则综合考虑生产井控制区和非控制区对气藏平均地层压力的影响,根据能量守衡原理,建立气藏平均地层压力的计算方法。

The average pressure of gas reservoir is a mandatory parameter in the dynamic analysis process. How to calculate it accurately is always concerned by gas reservoir engineers. As gas reservoir production status and their own characteristics decided to adopt measure pressure after closing all the production wells which have been unreal- istic. At present, weighing methods which are mostly used in calculation are the average pressures of gas reservoir, but they are only considering the pressure change inside the supply radius, without taking into account the non - gas well control the pressure in the region, leading to errors. Based on the energy conservation, the energy - weight -coefficient method has been established to calculate the average pressure considering both inside and outside of the supply radius of the gas reservoir.