China Petroleum Exploration ›› 2006, Vol. 11 ›› Issue (4): 37-41,4.

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Thermal Simulation Experiment on Generation of Oil-gas and H2S fromMarlite in Lower Triassic Feixianguan Formation in Northwestern Sichuan

Li Jian,Xie Zengye,Zhang Guangwu,Li Zhisheng and Wang Chunyi   

  • Online:2006-08-15 Published:2006-08-15

Abstract: In consideration of the characteristics of high-maturity and low organicmatter abundance of Feixianguan Formation carbonate rocks found in Sichuan Basin,thermal simulation experiments has carried out on marlite samples collected from the fresh outcrops of Feixianguan Formation,Lower Triassic,at Shangsi,Jiange County,Northwest Sichuan. Not only revealed the evolving process and characteristics of hydrocarbon generation but also provided important parameter for the external estimation of Feixianguan Formation marls in Sichuan Basin. According to the results, themaximum yield ratio of oil hydrocarbon was up to 142.2kg per ton and the figure of Ro (0.63%~1.2% ) is the peak of oil generation; and themaximum yield ratio of gas hydrocarbon was up to 793.9 cubic meters per ton, and the H2S has been detected by the instrument of Agilent 6890N TCD in the gases collected from the different simulation temperature. All of these indicate that themarlite source rocks are of great hydrocarbon- generating potential and H2S under suitablematurity conditions in Sichuan Basin.

Key words: marlitesource rock, thermalsimulation experiment, hydrocarbon- generating ratio;H2S;natural gas;Feixianguan formation;Sichuan Basin

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