盆地超压层段非幕式突破期的地热场模型数值解法

李星; 吴冲龙; 刘刚; 毛小平

Volume 26 Issue 5

Sep. 2001

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Article Navigation > Earth Science > 2001 > 26(5): 513-516

LI Xing, WU Chong-long, LIU Gang, MAO Xiao-ping, 2001. NUMERICAL SOLUTION TO GEOTHERMAL FIELD MODEL OF OVERPRESSURE STRATUM AT NON-EPISODE MODE EXPULSION STAGE OF BASIN. Earth Science, 26(5): 513-516.

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LI Xing, WU Chong-long, LIU Gang, MAO Xiao-ping, 2001. NUMERICAL SOLUTION TO GEOTHERMAL FIELD MODEL OF OVERPRESSURE STRATUM AT NON-EPISODE MODE EXPULSION STAGE OF BASIN. Earth Science, 26(5): 513-516.

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NUMERICAL SOLUTION TO GEOTHERMAL FIELD MODEL OF OVERPRESSURE STRATUM AT NON-EPISODE MODE EXPULSION STAGE OF BASIN

1.
Department of Mathematics and Physics, China University of Geosciences, Wuhan 430074, China
2.
Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, China
3.
Department of Geophysics, China University of Geosciences, Wuhan 430074, China

Received Date: 2001-01-14
Publish Date: 2001-09-25

Abstract

Abstract

The simulation of the geothermal field of overpressure stratum in a basin is a key to the research into the overpressure genesis and its effect on oil and gas generation and expulsion. However, the numerical solution to the thermal conduction equation of the overpressure stratum has not been proved very effectively. The key to this problem is determination of the speed field of the overpressure fluid. The expulsion speed of the overpressure fluid is extremely low before the episode-like expulsion of the overpressure fluid. In addition, the corresponding speed field: v =v_x i +v_z k satisfies the condition ∂_{v_x}/∂_x+∂_{v_z}/∂_z=0. In this sense, this speed field can be approximately regarded as stable incompressible source-free fluid. This condition and the corresponding boundary pressure condition are both employed to simplify the whole calculation process. Therefore, the finite element numerical solution of the geothermal field and the corresponding simulation software thus designed can be used to simulate dynamically the geothermal field of the overpressure stratum before the episode-like expulsion in the petroleum and gas basin.
- sedimentary basin,
- geothermal field,
- overpressure stratum,
- overpressure-fluid speed field,
- simulation,
- thermal conduction equation,
- numerical solution

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References(16)

References

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