石油实验地质2016，Vol.38Issue(6)：732-741,10.DOI:10.11781/sysydz201606732
扬子地区古生界泥页岩吸附性及控制机理
Adsorption capacity and controlling mechanisms of Paleozoic shales in Yangtze region
摘要
Abstract
As a gas⁃rich shale layer, the Paleozoic in Yangtze region is a main target for shale gas exploration and development in China. Adsorption state is one of the most important occurrence modes of shale gas;hence it is very necessary to study the adsorption capacity and controlling mechanisms of shales. We collected some shale samples from Paleozoic in Yangtze area, and then carried out TOC analysis, Rock⁃Eval, XRD and water content analyses, isother⁃mal adsorption experiments, and ultra⁃high pressure isothermal adsorption experiments. The adsorption properties of shales vary during different ages and in different areas due to the combined effects of TOC content and mineral compo⁃sition. The TOC content and methane adsorption of shales do not have a positive relationship as proposed by previous researchers, because that shale samples are limited and are in the high⁃mature and over⁃mature stages. The methane adsorption isotherms of kerogens in different ages show that older kerogens have a stronger methane adsorption capacity. Removing the effects of organic matter abundance and maturity, the kerogens of typeⅢadsorb more methane than those of typeⅡ. If organic matter abundance and type are the same, the methane adsorption amount of high matu⁃rity kerogen is more than that of low maturity kerogen. Soluble organic matter can dissolve and adsorb methane, and hence improve the methane adsorption capacity of shales. The relationship between clay mineral and methane adsorp⁃tion which is normalized by TOC is not obvious, this is mainly because the samples contain water.Maturity, porosity and permeability may affect the maximum methane adsorption of shales. Compared with low pres⁃sure, the methane adsorption characteristics under high pressure have a certain continuity. There are several influencing factors, which demand deep research to reveal the influence of each single factor on shale adsorption characteristics.关键词
矿物成分及含量/等温吸附曲线/可溶有机质/吸附能力/超高压/泥页岩/古生界/扬子地区Key words
mineral composition and content/isothermal adsorption curve/soluble organic matter/adsorption capacity/ultra-high pressure/shale/Paleozoic/Yangtze region分类
天文与地球科学引用本文复制引用
徐良伟,刘洛夫,刘祖发,孟召平..扬子地区古生界泥页岩吸附性及控制机理[J].石油实验地质,2016,38(6):732-741,10.基金项目
“十二五”国家科技重大专项“页岩气勘探开发关键技术”（2011ZX05003）、国家重点基础研究发展计划（973计划）项目（2012CB214705－02）和国家科技重大专项（2011ZX05008－002－41）联合资助。 （）
