Evolution of nanoporosity in organic-rich shales during thermal maturation

被引：323
作者：
Chen, Ji [1 ,2 ]
Xiao, Xianming [1 ]
机构：
[1] Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Guangdong, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
FUEL | 2014年 / 129卷
关键词：
Gas shale; Anhydrous pyrolysis; Thermal maturation; Nanoporosity evolution; NORTHEASTERN BRITISH-COLUMBIA; TIGHT GAS-RESERVOIR; PORE STRUCTURE; SURFACE-AREA; GEOLOGICAL CONTROLS; METHANE ADSORPTION; BARNETT SHALE; SOURCE ROCKS; POROSITY; BASIN;
D O I：
10.1016/j.fuel.2014.03.058
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Artificial shale samples with equivalent vitrinite reflectance values (VRo) ranging from 0.69% to 4.19% were obtained from an anhydrous pyrolysis experiment. Microporous and mesoporous characteristics of these samples were investigated by low-pressure nitrogen and carbon dioxide adsorption techniques. The result shows that the nanoporosity (microporosity plus mesoporosity) increases with thermal maturity after the oil window stage, and this increase is attributed to the formation of porosity within organic matter and/or mineral-organic matter groundmass, rather than in the pure clay minerals. By combining the gas generation and porosity evolution of these shales, a general model for formation and development of the nanoporosity is proposed. (C) 2014 Elsevier Ltd. All rights reserved.
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页码：173 / 181
页数：9
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