珠江口盆地惠州地区珠江组控砂机制及地层-岩性圈闭发育模式

doi:10.11743/ogg20120315

Abstract

Abstract:

Huizhou is an area with the highest exploration maturity in Pearl River Mouth Basin,wherein the Zhujiang Formation is the primary oil-producing layer and has the potential of finding stratigraphic-lithologic traps.Through analyses on the factors controlling sandbody distribution of the Zhujiang Formation in Huizhou area,this paper concludes that various factors including palaeogeomorphology,sequence stratigraphy,delta-dominated sedimentary facies distribution and hydrodynamics in transitional zone during basin transformation and subsequent tectonic movements all have important influences on the formation and distribution of sandstones.Sedimentary facies determines the macroscopic distribution of sandbodies,and sequence structure influences the lateral and vertical sandbody development and sandbody stacking patterns in different system tracts.Sedimentary facies and sequence structure are the two main controlling factors.Based on the study of the controlling factors and the discovered lithologic hydrocarbon reservoirs,this paper establishes development models of stratigraphic-lithologic traps of Zhujiang Formation in Huizhou area,and analyzes the favorable area and types of stratigraphic-lithologic traps.We believe that the lithologic pinchout traps around sedimentary slope-break and/or within transgressive system tracts are the best ones for hydrocarbon accumulation.

Key words: development model, sandbody-controlling factor, stratigraphic-lithologic trap, Zhujiang Formation, Huizhou area, Pearl River Mouth Basin

CLC Number:

TE122.1

Chen Weitao, Du Jiayuan, Long Gengsheng, Chen Shuhui, Li Xiaoping, Zhang Shangfeng, Zhang Changmin. Factors controlling sandbody development and models of stratigraphic-lithologic traps of Zhujiang Formation in Huizhou area,Pearl River Mouth Basin[J]. Oil & Gas Geology, 2012, 33(3): 449-458.

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Factors controlling sandbody development and models of stratigraphic-lithologic traps of Zhujiang Formation in Huizhou area,Pearl River Mouth Basin

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