Phase fractionation controlling regional distribution of diamondoids: A case study from the Halahatang oil field, Tarim Basin, China
文献类型：期刊论文
| 作者 | Qi, Yu1,4,5; Sun, Peng3; Cai, Chunfang1,3,5; Wang, Daowei2; Peng, Yanyan1,5 |
| 刊名 | MARINE AND PETROLEUM GEOLOGY
 |
| 出版日期 | 2022-06-01 |
| 卷号 | 140页码:17 |
| 关键词 | Diamondoid Biomarker Phase fractionation Evaporative fractionation Tarim Basin |
| ISSN号 | 0264-8172 |
| DOI | 10.1016/j.marpetgeo.2022.105674 |
| 英文摘要 | Large volumes of black and volatile oils have been recently discovered from 7000 m to 8400 m below surface in the Tarim Basin. Diamondoids, compounds recalcitrant to thermal stress, have been applied to estimate the extent of oil-cracking, but uncertainties remain concerning additional influences, such as evaporative fractionation and biodegradation. To investigate controls on diamondoid abundance in oil reservoirs, we performed detailed geochemical characterizations of biomarkers and diamondoids of twenty-eight oils from the Halahatang sub-Depression in the Tabei area of the Tarim Basin. Based on the results, the oils belong to one population. Three oils in the northeastern Halahatang area show the coexistence of n-alkanes and 25-norhopanes, indicating that early-expelled oils were severely biodegraded and then mixed with later, fresh charges of oil. Multiple molecular maturity indices suggest that oil maturities increase with depth. Interestingly, 3-+ 4-methyldiamantanes, which should be enriched in highly mature oils, are found to be more abundant in less mature oils from shallower reservoirs, with exceptions of only four samples in the northeast. Published data for the eastern Lunnan area display a similar pattern that diamondoids are progressively enriched in shallower oils. The special pattern is interpreted to be the result of phase fractionation induced by a gas-dominated late charge. The late charge of gas firstly extracted diamondoids from deep-buried, highly-cracked oils through evaporative fractionation. As the vapor migrated towards the up-dip direction, decrease of pressure and temperature led to condensation of the diamondoids in the vapor. Briefly, the diamondoids were transferred to relatively shallow reservoirs through a combination of evaporative fractionation and subsequent phase separation. Alternatively, the abnormal enrichment of diamondoids in the northern part may be because of locally vertical charges of highly mature, diamondoid-rich gases through large faults. |
| WOS关键词 | PALEOZOIC MARINE PETROLEUM ; SOURCE ROCKS ; CRUDE OILS ; NW CHINA ; DEPOSITIONAL ENVIRONMENT ; AROMATIC-HYDROCARBONS ; COMPOSITIONAL CHANGES ; ORGANIC GEOCHEMISTRY ; MATURITY PARAMETERS ; GAS EXPLORATION |
| 资助项目 | National Natural Science Foundation of China[41730424] ; National Natural Science Foundation of China[41961144023] ; National Natural Science Foundation of China[42002162] ; China Postdoctoral Science Foundation[2020M670451] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000792329800001 |
| 出版者 | ELSEVIER SCI LTD |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/105909]  |
| 专题 | 地质与地球物理研究所_中国科学院新生代地质与环境重点实验室 |
| 通讯作者 | Cai, Chunfang |
| 作者单位 | 1.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 2.China Univ Geosci Beijing, Energy Resource Dept, Beijing 100083, Peoples R China 3.Yangtze Univ, Key Lab Explorat Technol Oil & Gas Resources, Minist Educ, Wuhan 430100, Peoples R China 4.Yanshan Univ, Sch Vehicle & Energy, Dept Petr Engn, Qinhuangdao 066004, Hebei, Peoples R China 5.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 |
Qi, Yu,Sun, Peng,Cai, Chunfang,et al. Phase fractionation controlling regional distribution of diamondoids: A case study from the Halahatang oil field, Tarim Basin, China [J]. MARINE AND PETROLEUM GEOLOGY,2022,140:17. |
| APA |
Qi, Yu,Sun, Peng,Cai, Chunfang,Wang, Daowei,&Peng, Yanyan.(2022). Phase fractionation controlling regional distribution of diamondoids: A case study from the Halahatang oil field, Tarim Basin, China .MARINE AND PETROLEUM GEOLOGY,140,17. |
| MLA |
Qi, Yu,et al." Phase fractionation controlling regional distribution of diamondoids: A case study from the Halahatang oil field, Tarim Basin, China ".MARINE AND PETROLEUM GEOLOGY 140(2022):17. |
入库方式： OAI收割
来源：地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。