煤层气采收率预测方法评述  

The review on the predictive methodology of coalbed methane recovery efficiency

作　　者：张培河[1] 李贵红[1] 李建武[1] 

机构地区：[1]煤炭科学研究总院西安分院,陕西西安710054

出　　处：《煤田地质与勘探》2006年第5期26-30,共5页Coal Geology & Exploration

基　　金：国家重点基础研究发展规划(973计划)项目(2002CB11700)资助

摘　　要：综合评述了煤层气采收率预测方法。分别对类比法、解吸法、气含量降低估算法、等温吸附曲线法和气藏数值模拟法的原理、适用条件以及存在问题等进行了探讨,并对关键参数的确定方法进行了详细的介绍。文章指出:解吸法、气含量降低估算法和等温吸附曲线法虽然计算过程简单,但因其考虑因素少,确定的采收率可靠性差;类比法取决于研究者对研究区和类比区的研究程度以及自身的技术水平和经验;气藏数值模拟法确定的煤层气采收率比较准确,但适用的范围较窄,而且所需数据多,计算过程复杂。The predictive methodology of CBM recovery efficiency involving the geology analogy, desorption, reduced-gas content estimation, adsorption isotherm and CBM reservoir numerical simulation is reviewed in the paper. The principle, applicable condition and existent problem of each method are discussed separately, and the determination method of key parameters is introduced in detail. Though simple the computation process of desorption, reduced-gas content estimation and adsorption isotherm is, the reliability of recovery efficiency according to that is dissatisfactory because of its fewer considerable factors. The geology analogy lies on the investigative degree of researchers for studied block and analogy block and their own technique level and experiments. The CBM recovery efficiency from reservoir numerical simulation is more exact,regardless of its more narrow applicable range,its more necessary data and its more complex computation.

关 键 词：煤层气 采收率 预测方法 气藏数值模拟 

分 类 号：P618.11[天文地球—矿床学]