Geochemical characteristics of natural gas and the contribution ratio of source rocksin the Yingshan Fault Depression of the Songliao Basin

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  • 1.Northeast Petroleum University,Daqing 163318,China;
    2.Exploration and Development Research Institute of Daqing Oilfield Company Ltd.,Daqing 163712,China

Received date: 2016-04-19

  Revised date: 2016-06-30

  Online published: 2019-09-06

Abstract

Based on the character of gas composition and isotope and light hydrocarbon fingerprint and source rock in Yingshan Fault Depression,gases in the Yingcheng Formation  and Shahezi Formation  are derived from a mixture of  humic and sapropellic  source rocks,and are at high-mature to over-mature thermal evolution stage.Shahezi Formation is a set of good-medium source rocks,and Yingcheng Formation  is a set of medium-good source rocks.The organic matter is dominated by type Ⅲ kerogen and followed by type Ⅰ and type Ⅱ.Jurassic is a set of good or non-poor source rocks,and the organic matter is type Ⅲ.It is at over-mature evolution stage.According to the gas geochemistry characteristic and source rock distribution feature in Yingshan Fault Depression,selecting source rock specimens in Yingcheng Formation ,Shahezi Formation  and Hushiling Formation  and according to the hydrocarbon fingerprint characteristic parameter of hydrocarbon source rocks,the calculating model uses mathematical simulation method to test the ration contribution and adjust per mouth of well of natural gas from three suits of hydrocarbon source rocks to analog computation.Results show,contribution of the Shahezi Formation  source rock is more than 50%.It is the first time to obtain natural gas ration source from and ration contribution of hydrocarbon source rocks in Yingshan Fault Depression.

Cite this article

Zhang Bo-wei, Zhang Ju-he, Fu Guang . Geochemical characteristics of natural gas and the contribution ratio of source rocksin the Yingshan Fault Depression of the Songliao Basin[J]. Natural Gas Geoscience, 2016 , 27(12) : 2185 -2192 . DOI: 10.11764/j.issn.1672-1926.2016.12.2185

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