ANALYSIS OF INFLUENCING FACTORS FOR GROUND STRESS IN CHANNEL SANDSTONE

ZU Ke-wei; ZENG Lian-bo; LIU Xi-zhong; ZHANG Jun-hui; ZHAO Xiang-yuan; LIU Guo-ping

2014 Vol. 20, No. 2

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ZU Ke-wei, ZENG Lian-bo, LIU Xi-zhong, ZHANG Jun-hui, ZHAO Xiang-yuan, LIU Guo-ping. ANALYSIS OF INFLUENCING FACTORS FOR GROUND STRESS IN CHANNEL SANDSTONE[J]. Journal of Geomechanics, 2014, 20(2): 149-158.

Citation:

ZU Ke-wei, ZENG Lian-bo, LIU Xi-zhong, ZHANG Jun-hui, ZHAO Xiang-yuan, LIU Guo-ping. ANALYSIS OF INFLUENCING FACTORS FOR GROUND STRESS IN CHANNEL SANDSTONE[J]. Journal of Geomechanics, 2014, 20(2): 149-158.

ANALYSIS OF INFLUENCING FACTORS FOR GROUND STRESS IN CHANNEL SANDSTONE

1.
College of Earth Sciences, China University of Petroleum, Beijing 102249, China
2.
Key State Laboratory of Petroleum Resource and Prospecting at China Petroleum University, Beijing 102249, China

Received Date: 24 February 2014

Publish Date: 25 June 2014

Abstract

Abstract

With the further geological exploration, it is showed that different values and directions of in-situ stress are appeared in the adjacent sedimentary facies by a mass of production test data. By changing different boundary conditions(including the elasticity modulus and Poisson's ratio of channel and surrounding rock, the inclined angle between channel direction and the orientation of the regional principal stress and boundary stress ratio), the influence factors of the geostress in the channel sandstone are analyzed in finite element method. It is showed that the stress values and directions of the channel sandstone change seriously under the influences of different boundary conditions, compared with the in-situ stress characteristics in the surrounding rocks and region. The influence factors on the present stress of the channel sandstone are mainly the elastic modular ratio of channel to the surrounding rocks, the inclined angle between channel direction and the orientation of the regional principal stress and boundary stress ratio. The result could provide references for artificial fracturing and well network deployment in different sedimentary microfacies.
- ground stress /
- channel sandstone /
- finite element method /
- influence factors

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References

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