Abstract Production data analysis is proved to be an efficient reservoir engineering tool that can be utilized to estimate some important reservoir parameters including fluid in place and, average reservoir pressure. Among the available production data methods, flowing material balance is more popular. In spite of the development of this method for volumetric gas and, oil reservoirs over the past years, non-volumetric effect doesn't feature the equations. In this paper, modified flowing material balance equations are proposed for production data analysis of gas reservoirs subjected to finite-extended edge aquifer. The validity of the presented equations is performed using analytical solutions. For the development of analytical solutions, special simplifying assumptions are considered. To evaluate these assumptions, a comparison is performed using a commercial numerical reservoir simulator for some models with different rock and, fluid properties. Moreover, the introduced flowing material balance equation is combined with material balance equation in order to find a simple equation to calculate average reservoir pressure. Detailed steps are presented to determine gas in place of and, average reservoir pressure of this kind of reservoirs. Furthermore, for a better match between analytical and numerical outputs of gas flow rates, a correction coefficient is recommended which depends on the strength of aquifer.

中文翻译：

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边缘含水层驱动气藏生产数据分析：一种半分析方法

摘要 生产数据分析被证明是一种有效的油藏工程工具，可用于估计一些重要的油藏参数，包括流体就位和平均油藏压力。在可用的生产数据方法中，流动物料平衡更受欢迎。尽管在过去几年中开发了这种用于体积气和油藏的方法，但非体积效应不具有方程的特征。本文提出了改进的流动物质平衡方程，用于受有限扩展边缘含水层影响的气藏生产数据分析。所提出方程的有效性是使用解析解来执行的。对于分析解决方案的开发，需要考虑特殊的简化假设。为了评估这些假设，使用商业数值油藏模拟器对一些具有不同岩石和流体特性的模型进行比较。此外，将引入的流动物质平衡方程与物质平衡方程相结合，以找到一个简单的方程来计算平均储层压力。详细介绍了确定天然气替代此类储层的平均储层压力的步骤。此外，为了更好地匹配气体流速的分析输出和数值输出，建议使用一个取决于含水层强度的校正系数。将引入的流动物质平衡方程与物质平衡方程相结合，求得一个简单的计算平均储层压力的方程。详细介绍了确定天然气替代此类储层的平均储层压力的步骤。此外，为了更好地匹配气体流速的分析输出和数值输出，建议使用一个取决于含水层强度的校正系数。将引入的流动物质平衡方程与物质平衡方程相结合，求得一个简单的计算平均储层压力的方程。详细介绍了确定天然气替代此类储层的平均储层压力的步骤。此外，为了更好地匹配气体流速的分析输出和数值输出，建议使用一个取决于含水层强度的校正系数。