收稿日期: 2012-06-18
修回日期: 2012-10-19
网络出版日期: 2013-02-10
基金资助
国家科技重大专项“高产水/弱含水煤储层特性排采动态预测技术”(编号：2011ZX05034-003)；“深煤层储层物性及地质因素研究”(编号：2011ZX05042-002)；“山西沁水盆地煤层气水平井开发示范工程”(编号：2011ZX05061);“鄂尔多斯盆地东缘煤层气开发示范工程”(编号：2011ZX05062);“山西晋城矿区一体化煤层气开发示范工程”(编号：2011ZX05063)联合资助
Comparison of Experimental Adsorption between Shale Gas and Coalbed Gas
Received date: 2012-06-18
Revised date: 2012-10-19
Online published: 2013-02-10
煤层气的吸附特征决定了煤层气的开采特征，对比分析煤层气和页岩气的吸附特征对页岩气的开采具有重要的指导作用。通过页岩和煤层的等温吸附实验分别分析了不同温度下煤层和页岩的吸附特征，页岩有机质含量和有机质成熟度对页岩吸附的影响，以及不同煤阶等温吸附特征。研究表明随着温度的升高,页岩和煤层对甲烷的吸附量呈下降趋势，但是温度对页岩的吸附影响比煤层对甲烷吸附的影响更加明显；随着RO值的逐渐增大，煤层的PL值逐渐减小，VL值逐渐增加，页岩的PL值和VL值都逐渐减小；随着煤有机质含量的增加，煤层的PL值逐渐增加，VL值逐渐减小。随着页岩有机质含量的增高，页岩的PL值和VL值都逐渐增大；煤层对甲烷的最大吸附量比页岩多，采用降压解吸的方式对煤层吸附特征影响较大，但是对页岩气的吸附特征影响较小。
关键词： 页岩气; 煤层气; 等温吸附; 有机质含量(TOC); 有机质成熟度(RO)
赵金，张遂安，曹立虎 . 页岩气与煤层气吸附特征对比实验研究[J]. 天然气地球科学, 2013 , 24(1) : 176 -181 . DOI: 10.11764/j.issn.1672-1926.2013.01.176
Based on coalbed methane adsorption,CBM is successfully developed.it is great effect on shale gas exploration to comparatively analysis of coal bed methane and shale gas adsorption.It is subjected to the isothermal adsorption experiment with different temperatures to describe adsorption characteristics between varioues TOC and thermal maturity shale and different rank coal.The results shows that the adsorption quantity of methane on shale and coal decrease with temperature increase,but it is more sensitive for gas shale adsorption to temperature than that for coal. PL value in coal is negatively correlated with RO and positive with organic matter content, VL value in coal is positive correlated with Ro and negative with matter content;in constrast, PL and VL of shale decrease with RO and increase with organic matter content.Methane adsorption quantity for coal is more than that for shale.It is more noticeable effect on CBM production by means of pressure step-down desorption than that on gas shale development.
Key words： Gas shale; CBM; Isothermal adsorption; TOC; RO
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