Oil-source Correlation of Wa 6 Well Taizhou Formation in Gaoyou Sag,Subei Basin

WANG Yong-jian, WANG Yan-bin, GAO Sha-sha, GUO Hui, LI Xia

doi:10.11764/j.issn.1672-1926.2012.02.335

Natural Gas Geoscience >

2012 , Vol. 23 >Issue 2: 335 - 339

DOI: https://doi.org/10.11764/j.issn.1672-1926.2012.02.335

Oil-source Correlation of Wa 6 Well Taizhou Formation in Gaoyou Sag,Subei Basin

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1.Safety Engineering College North China Institute of Science and Technology, Sanhe 065201, China;
2.State Key Laboratory of Coal Resources and Mine Safety,China University of Mining and Technology, Beijing 100083, China

Received date: 2011-10-27

Revised date: 2011-11-30

Online published: 2012-04-10

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Abstract

The Tai 2 Member source rock does little contribution to the discovered oil reservoirs in the Gaoyou sag,only crude oil in the Wa 6 well has proved to be sourced from the Tai 2 Member source rock.By comparing with geochemistry of source rocks in the Tai 2 Member and crude oils in the Tai 1 Member collected from the wells of Ma 5 and Wa 6,the geochemical feature of crude oil in the Wa 6 well is similar with the Tai 2 Member,with Pr/Ph<1,Pr/nC₁₇18, inverse triangle shape of C₂₇, C₂₈ and C₂₉steranes,the lowest abundance of C₂₈-sterane is,and the highest abundance of C₂₉-sterane.Thetotal ion GC distribution of saturated hydrocarbon and GC-MS shapes of terpane and sterane in the crude oil of Ma 6 well are well correlated with the Tai 2Member source rock but obviously different from the Funing Formation source rock.Therefore,the result that the crude oil was sourced from the Tai 2 Member source rock will provides a new direction of oil and gas exploration for the Taizhou Formation in the Gaoyou sag.

Key words： Gaoyou sag; Source rocks; Oil-source correlation; Tai 2 Member; Biomarkers.

Cite this article

WANG Yong-jian, WANG Yan-bin, GAO Sha-sha, GUO Hui, LI Xia . Oil-source Correlation of Wa 6 Well Taizhou Formation in Gaoyou Sag,Subei Basin[J]. Natural Gas Geoscience, 2012 , 23(2) : 335 -339 . DOI: 10.11764/j.issn.1672-1926.2012.02.335

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