关键词: 异常高压气藏, 物质平衡方程, 原始地质储量, 累积有效压缩系数

Abstract: Based on the material balance equation of abnormally pressured gas reservoirs, assuming abnormal pressured model parameter being a linear fuction of cumulative gas production, the authors propose a new material balance equation which contains cubic term of cumulative production. This method only requires the data of production and don't consider the formation and fluid compressibility. The parameters can be determined by multiple regression analysis through historical data of the production. Gas-in-place and cumulative effective compressibility could be determined by the new material balance equation. The new method is applicable and effective through the application and comparative analysis of examples.

Key words: abnormally pressured gas reservoirs, material balance equation, gas-in-place, cumulative effective compressibility