NUMERICAL SIMULATION OF STRUCTURAL STRESS FIELD IN THE LATE SEDIMENTARY PERIOD OF E<i>s</i><sub>4</sub> AND PREDICTION OF THE LOWER-ORDER FAULTS IN LANGGU SAG

ZHANG Dan-dan; DAI Jun-sheng; FU Xiao-long

Volume 21 Issue 1

Mar. 2015

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Article Navigation > Journal of Geomechanics > 2015 > (1): 38-46

ZHANG Dan-dan, DAI Jun-sheng, FU Xiao-long, 2015. NUMERICAL SIMULATION OF STRUCTURAL STRESS FIELD IN THE LATE SEDIMENTARY PERIOD OF Es4 AND PREDICTION OF THE LOWER-ORDER FAULTS IN LANGGU SAG. Journal of Geomechanics, (1): 38-46.

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ZHANG Dan-dan, DAI Jun-sheng, FU Xiao-long, 2015. NUMERICAL SIMULATION OF STRUCTURAL STRESS FIELD IN THE LATE SEDIMENTARY PERIOD OF Es₄ AND PREDICTION OF THE LOWER-ORDER FAULTS IN LANGGU SAG. Journal of Geomechanics, (1): 38-46.

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NUMERICAL SIMULATION OF STRUCTURAL STRESS FIELD IN THE LATE SEDIMENTARY PERIOD OF Es₄ AND PREDICTION OF THE LOWER-ORDER FAULTS IN LANGGU SAG

School of Geosciences, China University of Petroleum, Qingdao 266580, China

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Abstract

Abstract

On the basis of the research of structural background, fault activity and structural evolution, the method of numerical simulation of structural stress was applied to simulate the stress distribution in the late sedimentary period of Es₄ in Langgu sag, and the development of the lower-order faults could be predicted. The research showed that the active faults in the late sedimentary period of Es₄ were Daxing fault, Banjiehe fault and so on. Niubei slope belt and Hexiwu structural belt were uplift obviously during this period. The comprehensive analysis indicated that the direction of the minimum principal stress was SE144°-NW324°, the development of the lower-order faults were mainly influenced by the minimum principal stress and the shear stress, et al. The minimum principal stress and the difference between principal stresses (the maximum and minimum principal stress) controlled the advantage area of the fault development. The plane shear stress controlled the fault strike, and its most faults in this area were NNE-NE. The profile shear stress controlled the dip direction, in the main part of this area the profile shear stress was sinistral shear stress, which showed that the dip direction of the most faults was NW.
- Langgu Sag,
- the late sedimentary period of Es₄,
- structural stress field,
- numerical simulation,
- lower-order fault

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