The forming mechanism and process of tight oil sand reservoirs: A case study of Chang 8 oil layers of the Upper Triassic Yanchang Formation in the western Jiyuan area of the Ordos Basin, China
文献类型：期刊论文
| 作者 | Wang, Yang1,2; Liu, Luofu1,2; Li, Shutong3; Ji, Haitao1,2; Xu, Zhengjian1,2; Luo, Zehua1,2; Xu, Tong1,2; Li, Linze1,2 |
| 刊名 | JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
 |
| 出版日期 | 2017-09-01 |
| 卷号 | 158页码:29-46 |
| ISSN号 | 0920-4105 |
| 关键词 | Tightening Process Tightening Mechanism Diagenesis Chang 8 Oil Layer Western Jiyuan Area Ordos Basin |
| DOI | 10.1016/j.petrol.2017.08.026 |
| 文献子类 | Article |
| 英文摘要 | Upper Triassic Yanchang Formation in the Ordos Basin, northwest China, comprise the typical tight oil reservoirs, which have porosity less than 10% and permeability less than 1 mD. The western Jiyuan area (WJA), at the western margin of th e Ordos Basin, has made significant progress in the tight oil exploration of the Yanchang Formation recently. Whereas the lack of recognition of tightening mechanism and process of reservoirs resulting in the misunderstanding of tight oil reservoirs prediction. This study focuses on the petrology, diagenetic processes, as well as forming mechanism and process of the Chang 8 (Ch-8) tight oil reservoirs located in the WJA. Four conclusions were reached. First, Ch-8 tight reservoirs, which are mainly composed of lithic arkose and feldspathic litharenite, experienced diagenesis, such as mechanical and chemical compaction, cementation, and dissolution. The reservoirs are at the late period of the mesogenetic A stage. Second, the tightness of the Ch-8 reservoirs is due to both sedimentary and diagenetic factors. The sedimentary environment where sand bodies are close to the provenance that has a rapidly increasing lacustrine level provides conditions for reservoir tightness. The initial porosity rapidly decreases due to compaction and cementation which produce porosity loss rates of 49.42% and 40.87%, respectively. By contrast, the effect of dissolution is limited, as it only increases porosity by 4.48%. Third, the tightening process of the Ch-8 reservoirs comprise four stages: compaction causes pores to reduce rapidly; followed by early cementation, which causes pores to reduce; dissolution, which causes pores to increase slightly; and late cementation, which causes tightness. Finally, it is likely that the Ch-8 reservoirs were already tight prior to hydrocarbon accumulation, thus demonstrating that they represent typical tight oil reservoirs. |
| WOS关键词 | LOW PERMEABILITY RESERVOIR ; SECONDARY POROSITY ; CARBONATE CEMENTS ; FLUID INCLUSIONS ; LONGDONG AREA ; SANDSTONES ; DIAGENESIS ; QUALITY ; ACCUMULATION ; COMPACTION |
| WOS研究方向 | Energy & Fuels ; Engineering |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE BV |
| WOS记录号 | WOS:000414179100003 |
| 资助机构 | National Natural Science Foundation of China(41372143) ; Research Fund for the Doctoral Program of Higher Education of China(20130007110002) ; "Light of West China" Program of the Chinese Academy of Sciences(1007RJYA013) ; National Natural Science Foundation of China(41372143) ; Research Fund for the Doctoral Program of Higher Education of China(20130007110002) ; "Light of West China" Program of the Chinese Academy of Sciences(1007RJYA013) ; National Natural Science Foundation of China(41372143) ; Research Fund for the Doctoral Program of Higher Education of China(20130007110002) ; "Light of West China" Program of the Chinese Academy of Sciences(1007RJYA013) ; National Natural Science Foundation of China(41372143) ; Research Fund for the Doctoral Program of Higher Education of China(20130007110002) ; "Light of West China" Program of the Chinese Academy of Sciences(1007RJYA013) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/62489]  |
| 专题 | 地质与地球物理研究所_兰州油气中心 |
| 通讯作者 | Liu, Luofu; Li, Shutong |
| 作者单位 | 1.China Univ Petr, State Key Lab Petr Resources & Engn, Beijing 102249, Peoples R China 2.China Univ Petr, Coll Geosci, Beijing 102249, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Gansu Prov Key Lab Petr Resources Res, Key Lab Petr Resources, Lanzhou 730000, Gansu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Yang,Liu, Luofu,Li, Shutong,et al. The forming mechanism and process of tight oil sand reservoirs: A case study of Chang 8 oil layers of the Upper Triassic Yanchang Formation in the western Jiyuan area of the Ordos Basin, China[J]. JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,2017,158:29-46. |
| APA | Wang, Yang.,Liu, Luofu.,Li, Shutong.,Ji, Haitao.,Xu, Zhengjian.,...&Li, Linze.(2017).The forming mechanism and process of tight oil sand reservoirs: A case study of Chang 8 oil layers of the Upper Triassic Yanchang Formation in the western Jiyuan area of the Ordos Basin, China.JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,158,29-46. |
| MLA | Wang, Yang,et al."The forming mechanism and process of tight oil sand reservoirs: A case study of Chang 8 oil layers of the Upper Triassic Yanchang Formation in the western Jiyuan area of the Ordos Basin, China".JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING 158(2017):29-46. |
入库方式： OAI收割
来源：地质与地球物理研究所
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