应力、应变与构造超压关系及构造超压控制因素分析

李玉喜; 庞雄奇; 姜振学

Volume 28 Issue 2

Mar. 2003

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Article Navigation > Earth Science > 2003 > 28(2): 179-184

LI Yu-xi, PANG Xiong-qi, JIANG Zhen-xue, 2003. Relationship of Stress & Strain to Abnormal Tectonic Pressure and Main Control Aspects on Abnormal Tectonic Pressure Forming. Earth Science, 28(2): 179-184.

Citation:

LI Yu-xi, PANG Xiong-qi, JIANG Zhen-xue, 2003. Relationship of Stress & Strain to Abnormal Tectonic Pressure and Main Control Aspects on Abnormal Tectonic Pressure Forming. Earth Science, 28(2): 179-184.

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Relationship of Stress & Strain to Abnormal Tectonic Pressure and Main Control Aspects on Abnormal Tectonic Pressure Forming

1.
Strategic Research Center for Oil & Gas Resources, Ministry of Land and Resources, Beijing 100034, China
2.
Basin & Reservoir Research Center, Petroleum University, Beijing 102249, China

Received Date: 2002-06-18
Publish Date: 2003-03-25

Abstract

Abstract

Tectonic stress can cause the deformation of rocks as well as the change of fluid pressure in the pore of rocks forming anomaly tectonic fluid pressure. Through analysis of the lithomechanical experiment results of Paterson etc, the authors find that the stress has a non-linear relationship to anomaly fluid pressure, while the volume strain has a linear relationship to anomaly fluid pressure. The anomaly pressures formed by other mechanisms all have the same characters - the relative changes of pore volume and fluid volume in the pore. So the general process of anomaly pressure formed by different mechanisms: when the rocks that have been saturated by fluid, the relative reduction of the pore volume causes the expelling of fluid; and the relative enlargement of the pore volume causes the inflow of fluid. If the permeability of the surrounding rocks is large enough, there would be no obvious anomaly fluid pressure formed. In contrast, if the permeability of surrounding rocks is small, the anomaly fluid pressure will be formed. The thickness and permeability of surrounding rocks and the strain rate of the pore are the main factors for forming anomaly pressure.
- stress,
- strain,
- fluid,
- anomaly pressure

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References(14)

References

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