A comprehensive study on the impacts of rock fabric on hydrocarbon generation and pore structure evolution of shale under semi-confined condition
文献类型：期刊论文
| 作者 | Song, Dongjun1,3; Wang, Xiaoqi2; Tuo, Jincai1; Wu, Chenjun1; Zhang, Mingfeng1; Su, Long1; He, Wei1,3 |
| 刊名 | MARINE AND PETROLEUM GEOLOGY
 |
| 出版日期 | 2021-02-01 |
| 卷号 | 124页码:16 |
| 关键词 | Rock fabrics Semi-closed pyrolysis Hydrocarbon expulsion-retention Gaseous hydrocarbons Porosity changes |
| ISSN号 | 0264-8172 |
| DOI | 10.1016/j.marpetgeo.2020.104830 |
| 英文摘要 | Semi-confined pyrolysis experiments were performed on core and powdered samples taken from type-II lacustrine mudstone to investigate the effects of sample rock fabrics on hydrocarbon generation and porosity changes when shale is subjected to pyrolysis. The generated hydrocarbons were analysed by organic geochemical methods to reflect differences in constituents and carbon isotopes. Gas (N-2 and CO2) adsorption tests were applied to solid residues to characterize the formation and development of pores after the two series of pyrolysis experiments. Simple calculations indicate that hydrocarbons prefer to expulse as intact rock fabric is destroyed. Secondary cracking gas accounted for approximately 23-30% and 28-49% of all gaseous hydrocarbons in the powdered and core samples, respectively. Side reactions, such as mineral catalytic and recombination reactions, prevailed during the semi-closed pyrolysis of powdered sample at 300-500 degrees C, causing generated C3+ hydrocarbon yields to be lower than those of the core sample. Additionally, gaseous hydrocarbons generated from the powdered sample were characterized by more positive delta C-13 and higher iso-/n-C-4,C-5 and C-1/C1-5 values. Side reactions ceased at 500-550 degrees C, and corresponding ratios tended to equalize. For the powdered samples, a higher expulsive ratio of hydrocarbons led to better pore development, the mesopore volume increased with increasing temperatures, and micropore volume decreased above 450 degrees C. Comparatively, the mesopore volume decreased above 450 degrees C for the core sample, and the micropore volume decreased above 500 degrees C. These results are helpful for revealing the genetic characteristics of shale gas and for understanding the origins of organic-hosted pores of the Cambrian Niutitang shale in southern China. The study suggests that samples with intact rock fabric should be used in future laboratory pyrolysis tests to generate results that better reflect natural conditions. |
| WOS关键词 | PYROLYSIS EXPERIMENTS INSIGHT ; PETROLEUM SOURCE ROCKS ; CHANG 7 MEMBER ; ORGANO-CLAY COMPOSITES ; DEEP BASIN GAS ; HYDROUS PYROLYSIS ; BARNETT SHALE ; ORDOS BASIN ; MISSISSIPPIAN BARNETT ; ISOTOPIC REVERSALS |
| 资助项目 | National Natural Science Foundation of China[41672127] ; National Natural Science Foundation of China[41602151] ; Natural Science Found of Gansu Province[17JR5RA293] ; National Key Research and Development Program of China[2019YFA0708701] ; National Science and Technology Major Project of China[2016ZX05046001] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000606451800002 |
| 出版者 | ELSEVIER SCI LTD |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Found of Gansu Province ; Natural Science Found of Gansu Province ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Found of Gansu Province ; Natural Science Found of Gansu Province ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Found of Gansu Province ; Natural Science Found of Gansu Province ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Found of Gansu Province ; Natural Science Found of Gansu Province ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/99998]  |
| 专题 | 地质与地球物理研究所_兰州油气中心 |
| 通讯作者 | Tuo, Jincai |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Petr Resources, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Gansu, Peoples R China 2.Res Inst Petr Explorat & Dev, Beijing 10083, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Song, Dongjun,Wang, Xiaoqi,Tuo, Jincai,et al. A comprehensive study on the impacts of rock fabric on hydrocarbon generation and pore structure evolution of shale under semi-confined condition[J]. MARINE AND PETROLEUM GEOLOGY,2021,124:16. |
| APA | Song, Dongjun.,Wang, Xiaoqi.,Tuo, Jincai.,Wu, Chenjun.,Zhang, Mingfeng.,...&He, Wei.(2021).A comprehensive study on the impacts of rock fabric on hydrocarbon generation and pore structure evolution of shale under semi-confined condition.MARINE AND PETROLEUM GEOLOGY,124,16. |
| MLA | Song, Dongjun,et al."A comprehensive study on the impacts of rock fabric on hydrocarbon generation and pore structure evolution of shale under semi-confined condition".MARINE AND PETROLEUM GEOLOGY 124(2021):16. |
入库方式： OAI收割
来源：地质与地球物理研究所
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