A STUDY ON THE DISTRIBUTION PATTERN OF SUPRASALT FAULT BASED ON NUMERICAL SIMULATION

SONG Sui-hong; HOU Jia-gen; LIU Yu-min; CAO Si-fan; HU Chen-bin

Volume 23 Issue 3

Jun. 2017

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Article Navigation > Journal of Geomechanics > 2017 > 23(3): 429-435

SONG Sui-hong, HOU Jia-gen, LIU Yu-min, et al., 2017. A STUDY ON THE DISTRIBUTION PATTERN OF SUPRASALT FAULT BASED ON NUMERICAL SIMULATION. Journal of Geomechanics, 23 (3): 429-435.

Citation:

SONG Sui-hong, HOU Jia-gen, LIU Yu-min, et al., 2017. A STUDY ON THE DISTRIBUTION PATTERN OF SUPRASALT FAULT BASED ON NUMERICAL SIMULATION. Journal of Geomechanics, 23 (3): 429-435.

Citation:

SONG Sui-hong, HOU Jia-gen, LIU Yu-min, et al., 2017. A STUDY ON THE DISTRIBUTION PATTERN OF SUPRASALT FAULT BASED ON NUMERICAL SIMULATION. Journal of Geomechanics, 23 (3): 429-435.

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A STUDY ON THE DISTRIBUTION PATTERN OF SUPRASALT FAULT BASED ON NUMERICAL SIMULATION

SONG Sui-hong^{1, 2
,},
HOU Jia-gen^{1, 2},
LIU Yu-min^{1, 2},
CAO Si-fan^{1, 2},
HU Chen-bin^{1, 2}

1.
College of Geoscience, China University of Petroleum, Beijing 102249, China
2.
State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China

More Information

Received: 2016-11-06
Published: 2017-06-01

Abstract

Abstract

The shape and distribution patterns of upsalt faults are mainly controlled by the shape of the lower part of the salt body and its corresponding upwelling force. The quantitative research on the formation mechanism and distribution pattern of upsalt faults plays an important role in the interpretation and prediction of upsalt faults, description of the shape of the salt body as well as the migration and accumulation of oil and gas. According to the quantitative relationship between the upwelling force and the shapes of the upsalt faults, three typical types of salt structures are identified in this paper.The distribution pattern of upwelling force is estimated and numerical modeling is conducted respectively for the three types of salt bodies, based on the quantitative relationship. Accordingly, the modeling results show that (1) In the salt structure with constant upwelling force, two symmetrical fault groups with consistent depth distribution are formed parallelly. (2) In the salt structure with linearly changing upwelling force, two fault groups with reversed directions are formed, in which, the distribution of the main faults is shallow and that of the secondary faults is deep and often limited by the former. Within each fault, the fault distribution linearly deepens as the upwelling force weakens, while the shape is not changed. (3) In the salt structure with parabola upwelling force, the two main fault groups are symmetrical with reverse directions. Within each fault, from the tectonic center to the edge, the inclination of the fault becomes less steeper while the distribution deeper, and there are emergence of the secondary faults mostly controlled by the main faults.The simulation results accord with the shape and the fault distribution pattern of the natural salt bodies, which confirms the theory of quantitative relation between upwelling force and shape of fault and the correctness of the simulation results.
- salt structure,
- fault pattern,
- upwelling force,
- numerical modeling,
- the Parabolic Mohr failure envelope

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References(22)

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