Developmental pattern of depositional system of the Lower to Middle Jurassic,east wing of Shanshan arc-shape belt in Turpan-Kumul Basin

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  • 1.Northwest Branch,Research Institute of Petroleum Exploration & Development,PetroChina,Lanzhou 730020,China;
    2.Key Laboratory of Reservoir Description,China National Petroleum Corporation,Lanzhou 730020,China

Received date: 2017-03-14

  Revised date: 2018-02-13

  Online published: 2018-03-10

Abstract

For the purpose to effectively analyze the“mismatching” of the plane distribution between reservoirs and depositional systems and then determine the favorable extended exploration domains of oil-rich zone,taking the sedimentary system analysis of seismic as the beginning,based on sandstone types and plane distribution of the drills and combining the plane distribution and vertical evolution of the fault system,the developmental pattern of the depositional system of the lower to Middle Jurassic of the east wing of the Shanshan arc-shape belt,Taibei Sag of Turpan-Kumul Basin,is systemically established.The results show that the sedimentary system mainly of the underwater distributary channel from south to north is obviously guided and controlled by the downthrows of the earlier normal fault system nearly in east-west extension;There are mainly two types of sandstone in the Lower to Middle Jurassic in the east wing.One is the main trench sandstone of the underwater distributary channel in SN direction,which contained the bed-loads,relatively coarse in grain size and situated at the small throw position of the faults in EW extension.The other is the thick massive or interbedded sandstone,which mainly composed of the suspended loads,relatively fine in grain size and accommodated in the lower part attaching the downthrows in the early normal fault period.Constrained and guided by the EW extension faults,the sandstones from different branches of the underwater distributary channel of the south provenance are deposited interbedded or superimposed in the lower part attaching the EW faults.The lithologic traps,formed by the thick massive or interbedded sandstone in the north of the EW faults,are the prospecting domain for the extended exploration of the Lower to Middle Jurassic in the east wing of the Shanshan arc-shape belt.

Cite this article

Yang Zhan-long,Huang Yun-feng,Sha Xue-mei,Wu Qing-peng,Huang Xiao-peng,Hao Bin . Developmental pattern of depositional system of the Lower to Middle Jurassic,east wing of Shanshan arc-shape belt in Turpan-Kumul Basin[J]. Natural Gas Geoscience, 2018 , 29(3) : 349 -357 . DOI: 10.1176/j.issn.1672-1926.2018.02.00

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