Deposition Characteristics and Distribution Pattern of Sublaucustrine Fan in Qingshankou Formation,Songliao Basin

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  • 1.Sedimentary Institute of Chengdu University of Technology,Chengdu 610059,China;
    2.Daqing Oil Field Company,CNPC,Daqing 163712,China;3.Northwest Branch of Research Institute of Petroleum 
    Exploration and Development,PetroChina,Lanzhou 730020,China

Received date: 2013-04-22

  Revised date: 2013-10-29

  Online published: 2014-03-10

Abstract

blacustrine fan is an important field for oil & gas exploration within source rock.Based on core,logging,and 3D seismic data,formation condition,sedimentary characteristics,seismic responses,and distribution pattern of sublacustrine fan in west slope break zone of Songliao Basin have been studied.The results of paleotopography reconstruction show that slope break zone is well developed in Yingtai area.Furthermore,slope break zone is an important discharging place for gravity flow sediments.Syndepositional fault movement,earthquake activity,and volcanic eruption are major trigger mechanisms for the formation of gravity flow.Sublacustrine fan is mainly composed of sandy debrite,sandy slide and sandy slump,with rare turbidite.Meanwhile,sublacustrine fan has sensitive seismic response characteristics,which is characterized by lenticular external configuration with varied internal amplitude and frequency in seismic profile.Sublacustrine fan is mainly distributed in the rising stage of forth-order base level cycle in vertical and adjacent to fan delta front in plane.On the whole,sublacustrine fan is characterized by excellent hydrocarbon accumulation condition,which can be a favorable target for lithologic reservoir exploration.

Cite this article

ZHANG Qing-Shi,ZHANG Ge,CHEN Bin-Tao,WANG Ge,LIANG Su-Juan,LIU Cai-Yan . Deposition Characteristics and Distribution Pattern of Sublaucustrine Fan in Qingshankou Formation,Songliao Basin[J]. Natural Gas Geoscience, 2014 , 25(3) : 318 -325 . DOI: 10.11764/j.issn.1672-1926.2014.03.318

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