金坛盐穴储气库单腔库容计算及运行动态模拟

概述了金坛盐穴储气库单腔库容的计算方法,并对其最大工作气量进行了静态分析。结果表明,单个溶腔的储气能力和溶腔个数决定了盐穴储气库的储气能力,在溶腔体积一定的情况下,单个溶腔的储气库能力主要取决于溶腔的运行温度和压力。为防止热物理性能参数对储气库运行的变化,提出储气库运行可以通过建立相关数学模型进行预测。运行模拟预测发现,盐穴运行条件下最恶劣工况是注气排卤后的运行工况。通过对溶腔不同的开采状态进行模拟,分析了不同开采状态对采出气在井口的温度压力变化,可为地面设施的配套提供参数。

Calculation and Operating Simulation on the Single Cavern Storage Capacity for Jintan Cavern Gas Storage

Salt cavern is one kind of underground oil storage facility formed by leaching bedded salt or salt dorm. Total gas volume correlate with single cavern capacity and number of caverns.Single cavern storage capaci- ty is determined by maximum pressure and cavern temperature.In process of gas injection and withdraw, natural gas is compressed and swelled and exchange heat with wellbore and salt,this process obey conser- vation of mass and energy and it can be predicted by establish mathematical model.Working gas volume is determined by operation pressure.Different withdraw time results in different temperature transformation in single cavern and it influences cavern pressure which determine working gas volume.The long time gas withdraws,the more stable temperature of cavern and the more working gas can be produced.Different withdraw condition result in different well head and cavern condition,so it needs to simulate cavern operating process and analyzes well head pressure and temperature,because well head pressure and temper- ature determine ground facility capacity.This paper describes the calculation and operating simulation on the single cavern storage capacity for Jintan Cavern Gas Storage.