A pyrolysis study of kerogen and extracted bitumen from a lacustrine shale of the Shahejie Formation and implications for in-situ conversion processes
文献类型：期刊论文
| 作者 | Sun, Yu2,3; Wang, Yiwei1,4; Liu, Jingzhong2,3; Wang, Yunpeng2,3 |
| 刊名 | JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
 |
| 出版日期 | 2024-10-01 |
| 卷号 | 183页码:14 |
| 关键词 | Pyrolysis Kerogen Extracted-bitumen In-situ conversion process Heating program |
| ISSN号 | 0165-2370 |
| DOI | 10.1016/j.jaap.2024.106735 |
| 英文摘要 | The in-situ conversion process (ICP) is an important industry technology to develop oil resources in medium-low maturity shales, and laboratory-based kinetics studies are an effective method to predict yields at different temperatures and heating times for the in-situ conversion process. Previous studies on ICP focused mainly on kerogen. However, these studies seldom considered the contribution of bitumen in shale, which cracks into light hydrocarbons at high temperatures and affects the yields and compositions of hydrocarbons in ICP. In this study, gold tube pyrolysis experiments of kerogen and extracted bitumen from the Shahejie Formation shale (38.72-41.21 Ma, Eocene) were conducted at two heating rates (2 and 20 degrees C/h) and the yields and kinetic parameters of four components (C-1, C2-5, C6-14 and C15+) were obtained. Hydrocarbon yields and compositions in ICP processes are determined by applying kinetic parameters to different heating programs. For constant heating programs, the temperature determines the maximum yields in ICP. The maximum yields of methane from kerogen in ICP at constant temperatures of 300 degrees C, 350 degrees C and 400 degrees C are 24.08 ml/g, 99.57 ml/g and 166.82 ml/g, respectively. In addition, the percentage of methane from kerogen of the total methane yield gradually decreased to 55.22 %, 40.22 % and 31.26 %, respectively, which indicates that most of the methane is generated from extracted bitumen at high temperature. There is a maximum yield temperature for ICP, above which heavy hydrocarbons are cracked at high temperatures to produce non-hydrocarbons such as CO2 and inert carbon, which reduces the total hydrocarbon yield. The maximum yield temperature of the Es3(x) shale at 1 degrees C/day, 3 degrees C/day and 5 degrees C/day was 420 degrees C, 430 degrees C and 436 degrees C, respectively. The total hydrocarbon and gas-oil ratio (GOR) curves of ICP heating using first a rapid and then slow heating rate (the T5-1 program) and a heating rate of 1 degrees C/day are the highest and similar. However, when heating with the T5-1 program, it took only 0.48 years at geological conditions to reach the maximum yield temperature, saving 226 days. This study recommends the first fast and then slow heating path as the heating program for ICP. Confirming the compositions and maximum yield temperatures of ICP under different heating programs contributes to the design of engineering projects for industrial production. |
| WOS研究方向 | Chemistry ; Energy & Fuels ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001311886500001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/81104]  |
| 专题 | 有机地球化学国家重点实验室 |
| 通讯作者 | Wang, Yunpeng |
| 作者单位 | 1.SINOPEC, Petr Explorat & Prod Res Inst, Beijing 100083, Peoples R China 2.Chinese Acad Sci, State Key Lab Organ Geochem, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.State Energy Ctr Shale Oil Res & Dev, Beijing 100083, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun, Yu,Wang, Yiwei,Liu, Jingzhong,et al. A pyrolysis study of kerogen and extracted bitumen from a lacustrine shale of the Shahejie Formation and implications for in-situ conversion processes[J]. JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS,2024,183:14. |
| APA | Sun, Yu,Wang, Yiwei,Liu, Jingzhong,&Wang, Yunpeng.(2024).A pyrolysis study of kerogen and extracted bitumen from a lacustrine shale of the Shahejie Formation and implications for in-situ conversion processes.JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS,183,14. |
| MLA | Sun, Yu,et al."A pyrolysis study of kerogen and extracted bitumen from a lacustrine shale of the Shahejie Formation and implications for in-situ conversion processes".JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS 183(2024):14. |
入库方式： OAI收割
来源：广州地球化学研究所
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