Research Structure of Fault Shadow Zone by Forward Modeling

doi:10.11885/j.issn.16745086.2015.12.04.02

Abstract

Abstract: Main fault block of Lufeng A Field developed in ancient uplift background, between the south and north fault, located upthrown fault, the main fault block is in the fault shadow zone composed by the two faults, Seismic profiles in fault shadow zone show "pull up" and "sagging". So it is a great structure uncertainty. To solve this problem, need to establish a series of forward modeling, trying to restore the true structure. The paper analyzes the results which cause structure distortion in fault shadow zone is the lateral velocity difference between the upthrow and downthrow, the throw and dip is the key factor that influences the seismic reflection image in fault shadow zone. By analyzing the results of forward modeling and the drilling data, the structure distortion of the law was identified, and the ZJ_1A depth structure of Lufeng A Field was restored.

Key words: modelling, fault shadow, structure distortion, fault throw, fault dip

CLC Number:

TE132

LIU Nan, LI Xisheng, HOU Yueming, DONG Ming. Research Structure of Fault Shadow Zone by Forward Modeling[J]. 西南石油大学学报(自然科学版), 2016, 38(5): 65-74.

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URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.11885/j.issn.16745086.2015.12.04.02

http://journal15.magtechjournal.com/Jwk_xnzk/EN/Y2016/V38/I5/65

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