Genetic Types of Potential Fault Zone and Its Significance on Hydrocarbon Accumulation

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

Received date: 2013-11-07

  Revised date: 2014-08-13

  Online published: 2019-09-20

Abstract

Potential fault zone refers to the zone bearing fracture tendency with different origin and scale which is caused by regional or local stress field and basement fault activities in the covering of sedimentary.It is a kind of fault zone and has relatively strong concealment.These zones are hidden and exhibit insignificant characteristics.Therefore,they are difficult to be identified and likely to be ignored.The characteristics of the rift system in the covering of sedimentary basin have been repeatedly studied by researchers around the world.The results suggest that potential fault zone is a tectonic phenomenon commonly arising in the covering of sedimentary basins in various states.According to the formation mechanism,potential fault zones can be classified into 5 types:(1)regional tectonic stress type of potential fault zone:formed by the changes of tectonic stress field which is caused by plate,mantle plume activities|(2)basal activity type of potential fault zone:formed by basement rift system and associated activities|(3)regional uplift type of potential fault zone:formed by echelon arranged burial hills|(4)transformation type of potential fault zone:formed by the changes of local stress field|(5)burial hill twist type of potential fault zone:formed by twist between burial hills and inner weak belts.The research indicates that potential fault zone controls the distribution of reservoir sand-bodies.Small faults and medium to low-amplitude structures are combined to form potential traps like fault-noses,fault blocks etc.Burial hill along its distribution formed structure ridge which is the pointing area of long-term hydrocarbon migration.

Cite this article

ZHOU Wei-wei, WANG Wei-feng, AN Bang, HU Yu, DONG Min . Genetic Types of Potential Fault Zone and Its Significance on Hydrocarbon Accumulation[J]. Natural Gas Geoscience, 2014 , 25(11) : 1727 -1734 . DOI: 10.11764/j.issn.1672-1926.2014.11.1727

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