原油裂解对油包裹体均一温度和捕获压力的影响及其地质意义

平宏伟; 陈红汉; RégisThiéry; 张晖; 李培军; 吴楠

doi:10.3799/dqkx.2014.056

Volume 39 Issue 5

May 2014

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Ping Hongwei, Chen Honghan, Régis Thiéry, Zhang Hui, Li Peijun, Wu Nan, 2014. Effects of Oil Cracking on Homogenization Temperature and Trapping Pressure of Oil Inclusion and Its Geological Significance. Earth Science, 39(5): 587-600. doi: 10.3799/dqkx.2014.056

Citation:

Ping Hongwei, Chen Honghan, Régis Thiéry, Zhang Hui, Li Peijun, Wu Nan, 2014. Effects of Oil Cracking on Homogenization Temperature and Trapping Pressure of Oil Inclusion and Its Geological Significance. Earth Science, 39(5): 587-600. doi: 10.3799/dqkx.2014.056

Citation:

Ping Hongwei, Chen Honghan, Régis Thiéry, Zhang Hui, Li Peijun, Wu Nan, 2014. Effects of Oil Cracking on Homogenization Temperature and Trapping Pressure of Oil Inclusion and Its Geological Significance. Earth Science, 39(5): 587-600. doi: 10.3799/dqkx.2014.056

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Effects of Oil Cracking on Homogenization Temperature and Trapping Pressure of Oil Inclusion and Its Geological Significance

doi: 10.3799/dqkx.2014.056

1.
Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education, China University of Geosciences, Wuhan 430074, China
2.
Université Blaise Pascal, Laboratoire Magmas et Volcans, BP 10448, F-63000, Clermont-Ferrand, France
3.
School of Geosciences, Yangtze University, Wuhan 430100, China

Received Date: 2013-12-21
Publish Date: 2014-05-01

Abstract

Abstract

This paper systematically elaborates the effects of oil cracking on homogenization temperature and trapping pressure of oil inclusion using crude oil crack kinetic and petroleum inclusion thermodynamics modeling. The results demonstrate that homogenization temperature shows a trend of increase and the trapping pressure shows a trend of decrease at the initial stage of oil cracking (T_R < 13%, T < 160 ℃); with the progressing of oil cracking (T_R < 24%, T < 190 ℃), homogenization temperature shows a trend of decrease and the trapping pressure shows a trend of increase, however, the homogenization temperature still exceeds the initial homogenization temperature and the trapping pressure is still below the initial trapping pressure at this stage of oil cracking. After that, the homogenization temperature continues to decrease or even turns negative values in some severe oil cracking processes; at the same time, trapping pressure continues to increase or exceed litho static pressure. In addition, oil cracking only results in normal pressure or under pressure during the initial stage of oil cracking (T_R < 13%, T < 160 ℃), while oil cracking will lead to overpressure (T_R > 40%) or even exceeding litho static pressure (T_R > 70%) during the high level of oil cracking. Therefore, deeply buried reservoirs with pressure systems from under pressure to normal pressure should be paid more attention especially when formation temperature ranges from 160 ℃ to 190 ℃, and oil cracking gas exploration should be focused on the reservoirs with overpressure or ultrahigh pressure when formation temperature is over 190 ℃.
- fluid,
- inclusion,
- homogenization temperature,
- trapping pressure,
- overpressure,
- oil cracking,
- thermodynamics,
- ,

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References(33)

References

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