Geochemical Characteristics of Bitumen "A" in Marine Carbonate Rock from the Tarim Basin

SUN Min-zhuo; LONG Guo-hui; MENG Qian-xiang; ZHENG Jian-jing; WANG Guo-cang; FANG Xuan; WANG Zuo-dong

2011 Vol. 30, No. 5

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Article navigation > Rock and Mineral Analysis > 2011 > 30(5): 623-630

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SUN Min-zhuo, LONG Guo-hui, MENG Qian-xiang, ZHENG Jian-jing, WANG Guo-cang, FANG Xuan, WANG Zuo-dong. Geochemical Characteristics of Bitumen 'A' in Marine Carbonate Rock from the Tarim Basin[J]. Rock and Mineral Analysis, 2011, 30(5): 623-630.

Citation:

SUN Min-zhuo, LONG Guo-hui, MENG Qian-xiang, ZHENG Jian-jing, WANG Guo-cang, FANG Xuan, WANG Zuo-dong. Geochemical Characteristics of Bitumen "A" in Marine Carbonate Rock from the Tarim Basin[J]. Rock and Mineral Analysis, 2011, 30(5): 623-630.

Geochemical Characteristics of Bitumen "A" in Marine Carbonate Rock from the Tarim Basin

1.
Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou 730000, China
2.
Petrolchina Qinhai Oilfield Research Institute of Exploration ＆ Development, Dunhuang 736202, China
3.
Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou 730000, China
4.
Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou 730000, China
5.
Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou 730000, China
6.
Graduate School of Chinese Academy of Sciences, Beijing 100039, China
7.
Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou 730000, China
8.
Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou 730000, China

Received Date: 18 November 2010

Revised Date: 22 February 2011

Publish Date: 28 October 2011

Abstract

Abstract

The marine carbonate rocks were crushed in to powder before taking chloroform solvent extraction by the Soxhlet apparatus. The soluble organic components were separated by column chromatography to yield saturated hydrocarbon, aromatic hydrocarbon and non-hydrocarbon after the asphaltene was precipitated by hexane. The saturated hydrocarbon and aromatic hydrocarbon were directly measured by Gas Chromatography-Mass Spectrometry (GC-MS). The non-hydrocarbon was esterified by BCl3-CH3OH mixed solution before taking measurement by GC-MS. The analysis result showed that the organic matters have undergone a high degree of evolution and the kerogen type is dominated by the aquatic organisms. The platform facies hydrocarbon-generating paleoenvironment was sulphur microorganism enriched saline deep water reducing environment. The organic matters of samples have experienced the strong process of cyclization-aromatization and demethylation, which were helpful to the generation of natural gas mainly with methane. The detectable long mid-chain ketones (C31-16-one, C33-16-one and C35-18-one) in the aromatic hydrocarbon might be the particular biomarkers about the presence of the organic acid salts.
- marine /
- carbonate /
- rock /
- saturated /
- hydrocarbon