| Statistical analysis as a tool for assisting geochemical interpretation of the Upper Triassic Yanchang Formation Ordos Basin Central China | |
Pan SQ; Horsfield B; Zou CN; Yang Z ; Gao DP(高大鹏); Pan, SQ (reprint author), Deutsch GeoForschungsZentrum GFZ Telegrafenberg, Sec 3 2, D-14473 Potsdam, Germany.; Yang, Z (reprint author), Dept Petr Geol, Xueyuan Rd 20, Beijing 100083, Peoples R China.
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| Source Publication | INTERNATIONAL JOURNAL OF COAL GEOLOGY
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| 2017-03-01 | |
| Volume | 173Pages:51-64 |
| ISSN | 0166-5162 |
| Abstract | The Yanchang Formation in the Ordos Basin is the most important petroleum play not only for conventional oil and gas accumulations but also for newly emerging shale oil and tight gas resources. The molecular characterization of the basinwide source rocks predicts three groups of generative petroleum types: Paraffinic High Wax Oil mixed base (Paraffinic-Naphthenic-Aromatic) Low Wax Oil and Gas and Condensate. Supplementary to previous work 68 samples including the crude oils source bitumens and reservoir extracts from the Yanchang petroleum play are analyzed. The distribution of two terpane classes (eight tricyclic terpanes and eight pentacyclic terpanes) are determined with subsequent simultaneous RQ-mode factor analysis for a composite data set of these samples alongside 216 published crude oils worldwide with known facies descriptions. Thermal maturity has been evaluated as a consistent distribution at first using a combined method of a maturity-related biomarker [Ts / (Ts + Tm)] and aromatic parameters (Methyldibenzothiophene Ratios) to alleviate the maturity differences effect when discussing geochemical characterization. The R-mode factor analysis consists of the first two factors that are describing 45 present of the cumulative total variance in the data set and presents a sample grouping pattern in Q-mode factor analysis which is determined by different contributions of terpane associations i.e. the tricyclic C-21 coupled with pentacyclic C-25 C-27 C-28 and Cm in the same factor space. Three terpane associations the C-28 and C-28 terpanes the C-21 and C-30 terpanes and the C-27 pentacyclic terpenes are respectively responsible for discriminating crude oil reservoir extracts and source bitumens in RQ-mode factor analysis. Molecular compositions further address more detailed interrelationships among three sample groups that crude oils and reservoir extracts are sharing close genetic relationships both in depositional environment typing and C-27-C-28-C-29 sterane distribution. Samples from source rocks vary much significantly. A mixing process which occurs after oils has been expelled from host source rocks into carrier units during accumulation. In addition the migration -contamination of C29 sterols when oils are cross through the Chang 7-2 unit along migration pathways might also explain this lack of correlation between source rocks and oil -reservoir system. (C) 2017 Elsevier B.V. All rights reserved. |
| Keyword | Upper Triassic Yanchang Formation Ordos Basin Geochemistry Molecular Composition Biomarker Simultaneous R- And Q-mode Factor Analysis |
| DOI | 10.1016/j.coal.2017.02.009 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000403120400005 |
| WOS Keyword | POLYCYCLIC AROMATIC-HYDROCARBONS ; PALEOZOIC MARINE PETROLEUM ; OIL-SOURCE CORRELATION ; SWEET AREA EVALUATION ; MULTIPLE SOURCE ROCKS ; NORTH-CENTRAL CHINA ; TYPICAL CRUDE OILS ; IN-SOURCE ROCKS ; GAS ACCUMULATION ; TARIM BASIN |
| WOS Research Area | Energy & Fuels ; Geology |
| WOS Subject | Energy & Fuels ; Geosciences, Multidisciplinary |
| Funding Organization | National Basic Research Program of China(2014CB239000) ; Chinese Major Scientific and Technological Program(2016ZX05406-006) ; China Scholarship Council (CSC)(201406010066) |
| Department | LMFS水环境流体力学(LEM) |
| Classification | 一类 |
| Ranking | 5 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/60605 |
| Collection | 流固耦合系统力学重点实验室 |
| Corresponding Author | Pan, SQ (reprint author), Deutsch GeoForschungsZentrum GFZ Telegrafenberg, Sec 3 2, D-14473 Potsdam, Germany.; Yang, Z (reprint author), Dept Petr Geol, Xueyuan Rd 20, Beijing 100083, Peoples R China. |
| Recommended Citation GB/T 7714 | Pan SQ,Horsfield B,Zou CN,et al. Statistical analysis as a tool for assisting geochemical interpretation of the Upper Triassic Yanchang Formation Ordos Basin Central China[J]. INTERNATIONAL JOURNAL OF COAL GEOLOGY,2017,173:51-64. |
| APA | Pan SQ.,Horsfield B.,Zou CN.,Yang Z.,高大鹏.,...&Yang, Z .(2017).Statistical analysis as a tool for assisting geochemical interpretation of the Upper Triassic Yanchang Formation Ordos Basin Central China.INTERNATIONAL JOURNAL OF COAL GEOLOGY,173,51-64. |
| MLA | Pan SQ,et al."Statistical analysis as a tool for assisting geochemical interpretation of the Upper Triassic Yanchang Formation Ordos Basin Central China".INTERNATIONAL JOURNAL OF COAL GEOLOGY 173(2017):51-64. |
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| JouAr-2017-065.pdf（1820KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Download | |
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