Lithologic Reservoirs >

2008 , Vol. 20 >Issue 2: 22 - 28

DOI: https://doi.org/10.3969/j.issn.1673-8926.2008.02.004

Delta depositional system and sandbody distr ibution of the second member of Shanxi Formation in Changbei Gasfield, Ordos Basin

  • WANG Su
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  • 1. Changbei Project Department, Changqing Oilfield Company, PetroChina, Xi’an 710021, China; 2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, China

Online published: 2008-06-15

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Abstract

Changbei Gasfield is located in the northeast of Shanbei Slope in Ordos Basin. Shanxi Formation of Lower Permian is a series of clastic deposits, and it can be divided into two lithologic segments (P1s1 and P1s2) , between which the second member of Shanxi Formation (P1s2) is the principal producing formation. Based on core description, mineral analysis and well logging data, Shan 2 member is considered as marine braided river delta deposit. Delta plain subfacies developed well in Changbei Gasfield, of which the widely developed distributary channel sandbodies are favorable for the hydrocarbon accumulation. The method of sequence-lithofacies paleogeographymapping is adopted to describe the sandbody distribution characteristics of Shan 2 member, which could offer reliable reference for reservoir prediction.

Key words： duplex wave migration; vertical boundaries; imaging

Cite this article

WANG Su . Delta depositional system and sandbody distr ibution of the second member of Shanxi Formation in Changbei Gasfield, Ordos Basin[J]. Lithologic Reservoirs, 2008 , 20(2) : 22 -28 . DOI: 10.3969/j.issn.1673-8926.2008.02.004

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