Study on Oil-prone and Gas-prone Property of Coal-measure Source Rocks

CHENG Ke-ming; XIONG Ying; LIU Xin-yue

Relative content of oil-prone carbon (C_o) and gas-prone carbon (C_g) in kerogen are detected using solid-state ¹³C nuclear magnetic resonance spectra analysis. C_o and C_g can be used to directly distinguish whether source rocks tend to generate oil or gas during "liquid hydrocarbon window". Although the kerogen of coal-measure source rock is characteristic of predominant humic type, C_o is more than C_g among aliphatic carbon of the kerogen, so the source rocks still tend to generate oil. According to relative content of C_o and C_g from solid state ¹³C nuclear magnetic resonance spectra analysis, the paper answers why Middle-Lower Jurassic coal-measure source rock of Xinjiang Yanqi basin tend to generate oil based on the mechanisms of hydrocarbon generation.

Study on Oil-prone and Gas-prone Property of Coal-measure Source Rocks

1. Research Institute of Petroleum Exploration & Development of China, CNPC, Beijing 100083;

2. Henan Petroleum Company of Sinopec, Nanyang Henan 473000

Received Date: 2003-10-17

Publish Date: 2004-12-10

Key words:

Abstract: Relative content of oil-prone carbon (C_o) and gas-prone carbon (C_g) in kerogen are detected using solid-state ¹³C nuclear magnetic resonance spectra analysis. C_o and C_g can be used to directly distinguish whether source rocks tend to generate oil or gas during "liquid hydrocarbon window". Although the kerogen of coal-measure source rock is characteristic of predominant humic type, C_o is more than C_g among aliphatic carbon of the kerogen, so the source rocks still tend to generate oil. According to relative content of C_o and C_g from solid state ¹³C nuclear magnetic resonance spectra analysis, the paper answers why Middle-Lower Jurassic coal-measure source rock of Xinjiang Yanqi basin tend to generate oil based on the mechanisms of hydrocarbon generation.

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Reference (9)

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Study on Oil-prone and Gas-prone Property of Coal-measure Source Rocks

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