Occurrence state of shale oil in saline lacustrine basins: A lithofacies perspective
文献类型：期刊论文
| 作者 | Zhang, Chenjia3; Cao, Jian3; Xiang, Baoli2; Zhou, Ni2; Li, Erting2; Wang, Yuce1,3; Liu, Jin2 |
| 刊名 | JOURNAL OF ASIAN EARTH SCIENCES
 |
| 出版日期 | 2023-10-01 |
| 卷号 | 255页码:16 |
| 关键词 | Multi-step Rock-Eval pyrolysis Free hydrocarbon Adsorbed hydrocarbon Sweet spot Source rock |
| ISSN号 | 1367-9120 |
| DOI | 10.1016/j.jseaes.2023.105799 |
| 英文摘要 | Occurrence state of shale oil in saline lacustrine basins is complex, thus restricting the availability of highefficiency shale oil exploration and exploitation. To address the complexity, we conducted a study of the middle Permian Lucaogou Formation in the Jimusar Sag, Junggar Basin, China, in a lithofacies perspective, using comprehensively multi-step Rock-Eval pyrolysis (MREP) and mineralogical, petrological, and organic geochemical methods. Results show that the low-mature to mature Lucaogou Formation in this study consists mainly of four lithofacies types, i.e., carbonate rocks, dolomitic/calcareous mudstones, silty/tuffaceous mudstones, and siltstones. The amount of free hydrocarbon (S1-1 + S1-2) and revised free hydrocarbon (S1-1 + S1-2 + S2-1) values obtained by MREP exceeds the S1 value obtained by conventional REP, which refines the evaluation of the shale oil potential. Shale oil in siltstones and carbonate rocks occurs mostly in fractures and pores in the free state, whereas the shale oil in mudstones occurs mainly in the matrix and kerogen, and on mineral surfaces in an adsorbed state. The shale oil potential of the four main lithologies is overall good, with the siltstone having the best potential (i.e., oil saturation index [OSI = S1 x 100/TOC] OSIavg = 313.22 mg HC/g TOC) and highest free hydrocarbon content ([S1-1 + S1-2]avg = 13.53 mg HC/g rock). The tuffaceous/silty mudstone has the best hydrocarbon generation potential (TOCavg = 8.01 wt%; PG = [S1 + S2]avg = 46.11 mg HC/g rock) and the highest content of adsorbed hydrocarbon (S2-1 avg = 13.78 mg HC/g rock), but the lowest shale oil potential (OSIavg = 105.78 mg HC/g TOC). The controlling factors on the free hydrocarbon content (S1-1 + S1-2) are complex but are mainly controlled by petrophysical properties. The amount of adsorbed hydrocarbon (S2-1) is controlled by the organic matter content. When a rock in the Lucaogou Formation has OSI > 100 mg HC/g TOC, the ratio of free to revised free hydrocarbon is > 50%, and the free hydrocarbon content is > 10 mg HC/g rock, the shale oil is favorable for exploration. Exploration and development of shale oil resources in saline lacustrine basins needs to consider the shale oil potential and its occurrence state and focus on sweet spots with good petrophysical properties, such as siltstones and carbonate rocks. |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001038252900001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/74499]  |
| 专题 | 有机地球化学国家重点实验室 |
| 通讯作者 | Cao, Jian |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Peoples R China 2.PetroChina Xinjiang Oilfield Co, Res Inst Expt & Testing, Xinjiang Key Lab Shale Oil Explorat & Dev, Karamay 834000, Xinjiang, Peoples R China 3.Nanjing Univ, Sch Earth Sci & Engn, State Key Lab Mineral Deposits Res, Nanjing 210023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Chenjia,Cao, Jian,Xiang, Baoli,et al. Occurrence state of shale oil in saline lacustrine basins: A lithofacies perspective[J]. JOURNAL OF ASIAN EARTH SCIENCES,2023,255:16. |
| APA | Zhang, Chenjia.,Cao, Jian.,Xiang, Baoli.,Zhou, Ni.,Li, Erting.,...&Liu, Jin.(2023).Occurrence state of shale oil in saline lacustrine basins: A lithofacies perspective.JOURNAL OF ASIAN EARTH SCIENCES,255,16. |
| MLA | Zhang, Chenjia,et al."Occurrence state of shale oil in saline lacustrine basins: A lithofacies perspective".JOURNAL OF ASIAN EARTH SCIENCES 255(2023):16. |
入库方式： OAI收割
来源：广州地球化学研究所
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