柴达木盆地西部英东地区油气成藏过程

桂丽黎; 刘可禹; 柳少波; 孙维凤; 孟庆洋; 袁莉; 吴凡; 郝加庆

doi:10.3799/dqkx.2015.073

Volume 40 Issue 5

May 2015

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Article Navigation > Earth Science > 2015 > 40(5): 890-899

Gui Lili, Liu Keyu, Liu Shaobo, Sun Weifeng, Meng Qingyang, Yuan Li, Wu Fan, Hao Jiaqing, 2015. Hydrocarbon Charge History of Yingdong Oilfield, Western Qaidam Basin. Earth Science, 40(5): 890-899. doi: 10.3799/dqkx.2015.073

Citation:

Gui Lili, Liu Keyu, Liu Shaobo, Sun Weifeng, Meng Qingyang, Yuan Li, Wu Fan, Hao Jiaqing, 2015. Hydrocarbon Charge History of Yingdong Oilfield, Western Qaidam Basin. Earth Science, 40(5): 890-899. doi: 10.3799/dqkx.2015.073

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Hydrocarbon Charge History of Yingdong Oilfield, Western Qaidam Basin

doi: 10.3799/dqkx.2015.073

Gui Lili^{1, 2
,},
Liu Keyu^{1, 2, 3
,
,},
Liu Shaobo^{1, 2},
Sun Weifeng^{1, 2},
Meng Qingyang^{1, 2},
Yuan Li⁴,
Wu Fan⁵,
Hao Jiaqing¹

1.
Research Institute of Petroleum Exploration and Development, Petrochina, Beijing 100083, China
2.
Key Laboratory of Basin Structure and Petroleum Accumulation, China National Petroleum Corporation, Beijing 100083, China
3.
CSIRO Earth Science and Resource Engineering, Bentley 6102, Australia
4.
Research Institute of Petroleum Exploration and Development, Petrochina Qinghai Oilfield Company, Dunhuang 736202, China
5.
Geoscience College, Northeast Petroleum University, Daqing163318, China

Received Date: 2014-10-26
Publish Date: 2015-05-15

Abstract

Abstract

The Yingdong oilfield, western Qaidam basin, is an important petroleum exploration front in the basin. However, the distribution of oil-gas-water is complex due to the complex structures and the pervasive faulting in the reservoirs and the petroleum accumulation process is still to be probed in detail. The petroleum accumulation process in the area was investigated by using an integrated grain fluorescence, fluid inclusion and organic geochemical analyses in this study. The results show follows: (1) There were two episodes of oil charge in N₂¹-N₂², as reflected by three types of hydrocarbon inclusions, occurred in around 12 Ma and 5 Ma, respectively. (2) The current oil accumulations in the oilfield derived from upward migration of palaeo-oil reservoirs in the depth are from the same sources. (3) The QGF index which is larger than 2 and the development of yellow fluorescent hydrocarbon inclusions with low mature crude oil indicate that there existed crude oil with low maturity recharge in the early stage. Such crude oil came from the same low mature oil source and there is no high mature oil in the source. The decreasing of light component with increasing buried depth indicates that the blue fluorescent hydrocarbon inclusions and gas hydrocarbon inclusions resulted from the late tectonic activity and the fault adjusted upward migration degassing channel system. The Yingdong oilfield has great exploration potential because of the inheritance structural development and the occurrence of two episodes of hydrocarbon accumulations.
- Yingdong oilfield,
- hydrocarbon charge history,
- quantitative grain fluorescence,
- fluid inclusion,
- infrared spectroscopy,
- petroleum geology,
- Qaidam basin

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References(45)

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Hydrocarbon Charge History of Yingdong Oilfield, Western Qaidam Basin

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