Lithologic Reservoirs ›› 2017, Vol. 29 ›› Issue (2): 10-18.doi: 10.3969/j.issn.1673-8926.2017.02.002

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Fine sedimentology of Hong 10 block in Honghaoershute Sag,Erlian Basin

ZHU Xiaomin1,2, DONG Yanlei2, ZHANG Mingjun2, PAN Rong2, LIANG Guanzhong3, ZHANG Jiuqiang3   

  1. 1. College of Geosciences, Yangtze University, Wuhan 430100, China;
    2. College of Geosciences, China University of Petroleum(Beijing), Beijing 102249, China;
    3. Geophysical Exploration Research Institute, PetroChina Huabei Oilfield Company, Renqiu 062552, Hebei, China
  • Received:2016-11-18 Revised:2017-01-20 Online:2017-03-21 Published:2017-03-21

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Abstract: In order to demonstrate the distribution of sedimentary sandbodies and guide fine hydrocarbon exploration in key areas in Honghaoershute Sag,Erlian Basin,under the guidance of the theories of sequence stratigraphy and sediemntology,based on the seismic reflection termination,lithology,sedimentary structure and well log facies,the Cretaceous A'ershan Formation was divided into one third-order sequence including lowstand systems tract(LST),transgressive systems tract(TST)and highstand systems tract(HST)in Honghaoershute Sag. The oil producing interval of HST could be divided into three parasequence sets(sand groups)and ten parasequences(sublayers),and nearshore subaqueous fan and braided delta are developed. The nearshore subaqueous fans are characterized by coarse sandy conglomerate with massive and grading beddings,scour,and interbeded with dark mudstone;while the braided deltas developed sandstone with middle-large wedge-shaped cross bedding, scour surface and discontinuous rhythm. The nearshore subaqueous fan and braided delta will prograde toward central lake or retrograde toward parent rock region following the lake level up or down. Large sandbodies are developed in sand group Ⅱ of A'ershan Formation because of sufficient source supply,therefore,sand group Ⅱ can be taken as key strata for further exploration in Hong 10 block of Honghaoershute Sag.

CLC Number: 

  • P618.13
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