Source Recognition and Charging Analysis of Oil in the Silurian Bituminous Sandstone in the Tarim Basin:Evidences from Biomarker Compounds

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  • 1.School of Earth and Space Sciences, Peking University, Beijing 100871,China;
    2.Petrochina Research Institute of Petroleum Exploration and Development, Beijing 100083,China;
    3.College of Earth Science, China University of Petroleum(Beijing),Beijing 102249,China

Received date: 2015-02-13

  Revised date: 2015-03-13

  Online published: 2015-05-10

Abstract

Elaborate and refined geochemical research work has been conducted on the Silurian bitumen sandstone extracts from the Tazhong Uplift and Tabei Uplift.Several explicit conclusions are summarized.Chloroform bitumen (“A”) ranges from 0.477 1% to 1.410 3%, implying the bitumen sandstone is petroliferous enough for crude oil production.The extract of bitumen sandstone shows much more similarity in the triaromatic dinoflagellates sterane distribution than that in most oils from the Tahe Oilfield and the potential source rocks have been regarded as the Middle-Upper Ordovician marls.Whereas chloroform bitumen (“A”) in well TP7 has much lower and different triaromatic steroids and triaromatic dinoflagellates sterane patterns which gives evidence of Cambrian source.Organic petrology data show bitumen in the sandstone is right in “oil window”, which is consistent with the mature information provided by the biomarker fingerprints Ts/(Ts+Tm) vs 4-/1-MDBT.Two accumulation periods are recognized with the reconstruction of burial history of Well Ha9.It is proposed that the abundant oil show and movable oil flow enlighten great potential for the exploration in the Silurian bitumen sandstone.

Cite this article

HU Jian,WANG Tie-guan,CHEN Jian-ping,SU Jin,CUI Jing-wei,ZHANG Bin,WANG Xiao-mei . Source Recognition and Charging Analysis of Oil in the Silurian Bituminous Sandstone in the Tarim Basin:Evidences from Biomarker Compounds[J]. Natural Gas Geoscience, 2015 , 26(5) : 930 -941 . DOI: 10.11764/j.issn.1672-1926.2015.05.0930

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