【摘要】 煤层气单井生产规律与常规气井差异很大,利用常规分析方法很难计算出煤层气井的动态控制储量。本文在煤层气的储集特征以及"解吸-扩散-渗流"规律基础上,利用物质平衡原理、气体状态方程、朗格缪尔解吸规律,建立了煤层气井物质平衡计算数学表达式,绘制了不同压力下解吸气与游离气的比例变化规律曲线,分析了煤层气气藏物质平衡图版与常规气藏物质平衡图版的区别。运用本文建立的方法对沁水盆地潘庄区块煤层气井进行了储量评价,结果表明煤层气井物质平衡储量计算方法准确可靠,对煤层气井的排采分析具有一定的指导意义。更多还原

【Abstract】 Coalbed gas well’s production process is very different from conventional gas well, it’s hard to calculate the single well controlled reserves by the conventional way.Material balance principle、equation of gas state and Langmuir desorption laws were engaged in this paper,based on reservoir feature and"desorb- diffuse- Seepage Flow"laws,the material balance equation of coal bed methane influent were established,with the the change law of adsorbed gas and free gas amount of different pressure marked,the difference of material balance chart between coalbed gas reservoir and conventional reservoir were analysised.Using the method of this article established to estimate the reserves of the coal bed gas well of Panzhuang block in Qinshui basin,the result prove that the material balance equation of coal bed methane influent was accurate and reliable,which has guiding significance for the analysis of coalbed gas production.更多还原