国外典型煤层气盆地可采资源量计算  

Calculation of abroad coalbed methane recoverable resources

作　　者：李勇[1] 汤达祯[1] 许浩[1] 王勃[2] 张彪 

机构地区：[1]煤层气国家工程中心煤储层实验室中国地质大学能源学院,北京100083 [2]中国石油勘探开发研究院廊坊分院,河北廊坊065007 [3]中煤地质工程总公司,北京100073

出　　处：《煤田地质与勘探》2014年第2期23-27,共5页Coal Geology & Exploration

基　　金：国家科技重大专项课题(2011ZX05062-01;2011ZX05028-02);国家自然科学基金项目(41272175)

摘　　要：随着国内煤层气勘探开发技术的逐渐成熟,国内油气公司开始着眼海外煤层气资源勘探开发。但由于国外煤层气盆地资料匮乏,有效评价其可采资源量是一个难题。选取国外几个典型煤层气盆地,将地质类比法引入煤层气可采资源量估算中。结合煤层气富集成藏的基本要素,依据煤层气盆地实际资料,优选了影响煤层气可采性的10个地质参数作为刻度区和预测区的相似系数,二态定性量化不同地质参数。以等温吸附法确定刻度区的采收率,结合实际采收率经验,采用蒙特卡洛组合抽样估算了可采系数的变化范围。通过对北美、俄乌哈和澳大利亚3个地区10个煤层气盆地的可采资源量计算和对比,发现澳大利亚的鲍恩盆地煤层气可采系数大,可采资源量丰富,具良好的勘探开发潜力。该方法可为国外其他煤层气盆地的可采资源量计算提供借鉴。In order to improve the precision in coalbed methane （CBM） exploration, geological analogy has been employed to evaluate CBM recoverable resources. Combining the basic parameters concerning CBM accumulation and reservoir formation and the relative statistics of CBM basins that could be acquired, the paper chooses 10 geo-logical parameters controlling CBM recoverability as index of similarity in index block and forecast blocks, further, these geological parameters were quantified through the quantitative binary status approach. The recoverable coef-ficient in index block was calculated by adsorption isothermal curves, in view of practical situation of CBM de-velopment, the variation range of the CBM recoverable coefficients in forecast blocks was calculated by method of Monte-carlo. The results of the recoverable resources calculation in 10 CBM basins in North America, Rus-sia-Ukraine-Kazakhstan and Australia, as the result of an evaluation from recoverable coefficient and geological reserves, indicated that Bowen Basin in Australia is higher in recoverable coefficient and larger in recoverable re-sources, showing good conditions for exploration and development.

关 键 词：煤层气 可采资源量 地质类比法 等温吸附 蒙特卡洛法 

分 类 号：P618.13[天文地球—矿床学]