影响海相烃源岩热解生烃过程的地质条件

郑伦举; 关德范; 郭小文; 马中良

doi:10.3799/dqkx.2015.075

Volume 40 Issue 5

May 2015

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Zheng Lunju, Guan Defan, Guo Xiaowen, Ma Zhongliang, 2015. Key Geological Conditions Affecting Pyrolysis Experiments of Marine Source Rocks for Hydrocarbon Generation. Earth Science, 40(5): 909-917. doi: 10.3799/dqkx.2015.075

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Zheng Lunju, Guan Defan, Guo Xiaowen, Ma Zhongliang, 2015. Key Geological Conditions Affecting Pyrolysis Experiments of Marine Source Rocks for Hydrocarbon Generation. Earth Science, 40(5): 909-917. doi: 10.3799/dqkx.2015.075

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Key Geological Conditions Affecting Pyrolysis Experiments of Marine Source Rocks for Hydrocarbon Generation

doi: 10.3799/dqkx.2015.075

Zheng Lunju^{1, 2
,},
Guan Defan¹,
Guo Xiaowen^{3
,
,},
Ma Zhongliang^{1, 2}

1.
Key Laboratory of Petroleum Accumulation Mechanisms, SINOPEC, Wuxi 214151, China
2.
Wuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi 214151, China
3.
Key Laboratory of Tectonics and Petroleum Resources of the Ministry of Education, China University of Geosciences, Wuhan 430074, China

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

Abstract

Abstract

Hydrocarbon generation simulation experiment (pyrolysis) is important for studying petroleum generation mechanisms and quantitatively estimating hydrocarbon generation potential of source rocks. The simulation experiment results not only depend on the temperature, pressure and duration, but also on the pore fluid, source rock compaction. In this paper, marine black mudstone with low maturity from the Permian Dalong Formation (P₂d) is used for hydrocarbon generation simulations with two types of high-pressure liquid water and low-pressure water steam. The results show that the high-pressure liquid water can increase the organic matter petroleum generation potential greatly, enhancing oil generation and retarding the transformation from oil to gas, suggesting important influence of geological factors such as high-pressure liquid water, fluid pressure and pore space on the hydrocarbon generation of the source rocks. The increase of the petroleum generation potential is due to the fact that the physicochemistry reaction of the kerogen is greatly enhanced at the presence of the near-critical properties water. It is concluded that the water in the pore space of the source rocks is of the high-pressure and low-temperature liquid water in the subsurface temperature (100-200 ℃) and pressure (30-120 MPa) conditions, which has the properties of near-critical water. Therefore, the hydrocarbon generation simulation experiment (pyrolysis) with high-pressure liquid water is more close to the actual geological conditions than that of the low pressure water steam and could be used to estimate hydrocarbon generation potential of source rock more effectively.
- pyrolysis simulation experiment,
- high-pressure liquid water,
- fluid pressure,
- pore space,
- hydrocarbon generation potential,
- petroleum geology,
- hydrocarbon

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References(29)

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