DF1-1底辟区构造应力场及渗流场演化的数值模拟研究

殷秀兰; 李思田; 杨计海

Volume 28 Issue 3

May 2003

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YIN Xiu-lan, LI Si-tian, YANG Ji-hai, 2003. Digital Simulation of Structural Stress Field and Flow Field in DF1-1 Diapir. Earth Science, 28(3): 268-274.

Citation:

YIN Xiu-lan, LI Si-tian, YANG Ji-hai, 2003. Digital Simulation of Structural Stress Field and Flow Field in DF1-1 Diapir. Earth Science, 28(3): 268-274.

YIN Xiu-lan, LI Si-tian, YANG Ji-hai, 2003. Digital Simulation of Structural Stress Field and Flow Field in DF1-1 Diapir. Earth Science, 28(3): 268-274.

Citation:

YIN Xiu-lan, LI Si-tian, YANG Ji-hai, 2003. Digital Simulation of Structural Stress Field and Flow Field in DF1-1 Diapir. Earth Science, 28(3): 268-274.

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Digital Simulation of Structural Stress Field and Flow Field in DF1-1 Diapir

1.
Institute of Geomechanics, CAGS, Beijing 100081, China
2.
Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, China
3.
China Offshore Oil Nanhai West Corp., CNOOC, Zhanjiang 524057, China

Received Date: 2003-03-24
Publish Date: 2003-05-25

Abstract

Abstract

DF1-1 diapir is one of the most active areas with the overpressure fluid in Yinggehai basin. The overpressure fluids were controlled by the structural stress and migration system made up of different types of fractures and faults. In terms of the large-scale vertical and episodic fluid flows in the diaper area, the dynamics of the fluid flows is mainly attributed both to the vertical pressure difference and to the local stress fields (including thermal stress field) caused by the changes in infiltration flow field from fluid flow. The relationship between structure and fluid flow in the diaper area thus obtained in this paper is employed to simulate, together with the finite element digital method, the evolutions of both the structural stress fields and the infiltration fluid filed that are in line with the process of diapirism. The results show that the stress fields and fluid migration fields before diapirism are different from those after it. As a whole, stress fields from the tectonic stress determined the fluid migrating pattern along the fault zone in the DF1-1 diapir, that is, the fluids migrating from both sides of the diapir to its center and migrating upward from the diapir. Thermal stresses caused by the high-pressure fluid flow also controlled the local stress pattern and petroleum and gas fluid flow direction, which drove the matured hydrocarbon fluid migration upward from depression to highland. Too great a thermal stress value might have changed the stress pattern and the general trend of the petroleum and gas migration.
- DF1-1 diapir,
- structural stress field,
- migration field,
- digital simulation

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References(14)

References

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