Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1306/10031817403 |
Geochemistry and possible origin of crude oils from Bashituo oil field, Tarim Basin | |
Song, Daofu1; Li, Meijun1; Shi, Shengbao1; Han, Zuozhen2; Meng, Bingkun1 | |
2019-04-01 | |
发表期刊 | AAPG BULLETIN
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ISSN | 0149-1423 |
EISSN | 1558-9153 |
出版年 | 2019 |
卷号 | 103期号:4页码:973-995 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | The entire range of hydrocarbons in Bashituo oils from Devonian and Carboniferous reservoirs were investigated to determine their origin, as well as their alteration, mixing, and maturity using gas chromatography, gas chromatography-mass spectrometry, and stable carbon isotope analysis. These geochemical studies indicate that the crude oils in the Devonian and Carboniferous reservoirs share similar C-15(+) molecular marker compositions of marine organic matter origin, whereas their light hydrocarbon compositions show distinct differences. The Carboniferous-reservoired oils are characterized by a relatively greater abundance of cycloalkanes and methylcyclohexane, which indicate a terrestrial organic matter (OM) contribution. Based on biomarker and carbon isotope analysis, Cambrian-Ordovician (epsilon-O) marine rocks are assumed to be the main source for both the Devonian- and Carboniferous-reservoired oils, whereas Carboniferous rocks with terrestrial OM input also contributed to the Carboniferous-reservoired oils. The coexistence of 25-norhopanes, evident humps from unresolved complex mixture, and intact n-alkanes in Devonian-reservoired oils indicate a mixture of early-charged biodegraded oils with late fresh oils, corresponding to at least two oil-generation episodes by the epsilon-O rocks. Light hydrocarbon indicators suggest a relatively high maturity beyond peak oil generation for the epsilon-O-sourced late fresh oil, whereas C-15(+) molecular marker parameters indicate a maturity equivalent to early peak oil generation for the epsilon-O-sourced, early-charged biodegraded oil. The maturity of the Carboniferous-sourced oil is equivalent to peak oil generation. The application of the entire range of hydrocarbons is essential when assessing a mixed or altered oil system because light hydrocarbons and biomarkers may yield different source-oil-correlations and maturities. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000464593300008 |
WOS关键词 | PALEOZOIC MARINE PETROLEUM ; LIGHT-HYDROCARBONS ; ORGANIC GEOCHEMISTRY ; CARBON-ISOTOPE ; NW CHINA ; DEPOSITIONAL ENVIRONMENT ; BIOMARKER DISTRIBUTIONS ; ROCK CORRELATIONS ; TABEI UPLIFT ; GAS |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/181868 |
专题 | 地球科学 |
作者单位 | 1.China Univ Petr, State Key Lab Petr Resources & Prospecting, Beijing, Peoples R China; 2.Shandong Univ Sci & Technol, Shandong Prov Key Lab Deposit Mineralizat & Sedim, Qingdao, Shandong, Peoples R China |
推荐引用方式 GB/T 7714 | Song, Daofu,Li, Meijun,Shi, Shengbao,et al. Geochemistry and possible origin of crude oils from Bashituo oil field, Tarim Basin[J]. AAPG BULLETIN,2019,103(4):973-995. |
APA | Song, Daofu,Li, Meijun,Shi, Shengbao,Han, Zuozhen,&Meng, Bingkun.(2019).Geochemistry and possible origin of crude oils from Bashituo oil field, Tarim Basin.AAPG BULLETIN,103(4),973-995. |
MLA | Song, Daofu,et al."Geochemistry and possible origin of crude oils from Bashituo oil field, Tarim Basin".AAPG BULLETIN 103.4(2019):973-995. |
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