Genesis of Delta Front Sand and Characteristics of Chang 8 StratigraphicalOil Pools in Maling-Zhenbei Area

ZHANG Qi-Chao, WANG  Duo-Yun, LI  Jian-Ting, LI  Shu-Tong, XIN  Bu-She, ZUO  Bo, LIU  Jun-Feng

doi:10.11764/j.issn.1672-1926.2011.05.807

Natural Gas Geoscience >

2011 , Vol. 22 >Issue 5: 807 - 814

DOI: https://doi.org/10.11764/j.issn.1672-1926.2011.05.807

Genesis of Delta Front Sand and Characteristics of Chang 8 StratigraphicalOil Pools in Maling-Zhenbei Area

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1.College of Resources Science and Technology,Beijing Normal University,Beijing 100875,China;
2.The Second Oil Production Plant of Changqing Oilfield Company,Qincheng 745100,China;
3.Key Laboratory of Oil and Gas Resources,Chinese Academy of Sciences,Lanzhou 730000,China

Received date: 2011-05-31

Revised date: 2011-08-02

Online published: 2011-10-10

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Abstract

The delta\|front zone of Yanchang Formation in the Maling\|Zhenbei area of Ordos basin is one of the important oil reservoir.Two different sedimentary systems in this area are the far source delta sedimentary system along the northeastern source direction and the western braided river delta sedimentary system.The microfacies of sand reservoir in the Chang 8 oil pools in the Malin-Zhenbei area are divided into mouth bars and channels.The channel microfacies can be further categorized into [JP2]three types as follows:(1) subaqueous distributary channels formed in the delta-front margin with normal depositional features;(2) subaqueous deep\|incised channels with both the sandy debris-flow and drag flow features;(3) waterways in fans with the comprehensive characteristics of sandy debris-flow,slump or turbidite.According to origin of reservoir sedimentary facies formation,the Maling-Zhenbei oil pools can be divided into three types:channel-waterways,turbidite fans and mouth bars.The genesis of sandy bodies and stratigraphical reservoirs not only improve the accuracy of reservoir prediction,but help to guide the petroleum exploration.

Key words： Delta front; Sand genesis; Ordos basin; Stratigraphical reservoir; Oil pool characteristics.

Cite this article

ZHANG Qi-Chao, WANG Duo-Yun, LI Jian-Ting, LI Shu-Tong, XIN Bu-She, ZUO Bo, LIU Jun-Feng . Genesis of Delta Front Sand and Characteristics of Chang 8 StratigraphicalOil Pools in Maling-Zhenbei Area[J]. Natural Gas Geoscience, 2011 , 22(5) : 807 -814 . DOI: 10.11764/j.issn.1672-1926.2011.05.807

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