THE GENESIS AND GEOCHEMICAL CHARACTERISTICS OF NATURAL GAS IN WELL YANG-1 IN NANPANJIANG BASIN

ZHANG Shu-pin,ZHAO Meng-jun,ZHANG Shui-chang, ZHAO Ling,LIU Pei-chu

doi:10.11764/j.issn.1672-1926.2005.06.797

Natural Gas Geoscience >

2005 , Vol. 16 >Issue 6: 797 - 803

DOI: https://doi.org/10.11764/j.issn.1672-1926.2005.06.797

THE GENESIS AND GEOCHEMICAL CHARACTERISTICS OF NATURAL GAS IN WELL YANG-1 IN NANPANJIANG BASIN

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1. School of Energy Resources, China University of Geoscience, Beijing 100083, China;2. Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 10083, China；3. Guizhou Research Department of Institute, Southern Petroleum Exploration and Development Corp., SINOPEC, Guiyang 550000,China

Received date: 2005-11-03

Revised date: 2005-11-11

Online published: 2005-12-20

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Abstract

The gases can mainly be divided into two groups being with high N₂ and high CO₂ in the gas shows of Well Yang-1. But, according to the gas analysis and the fact that all gases shows in Nanpangjiang area are with high N₂, the high N₂gas in Well Yang-1 is actual geological significant. The kind of the gas is featured with high N₂ content and heavier isotopic values, the N₂ content is from 54.92% to 73.89%, the δ¹³C₁ values are from -33.19‰ to -33.9‰.The gas in Well Yang-1, not being the cracked gas from crude oil and not being the gas derived from the measure strata of Longtan Formation of Upper Permian, is the cracked gas mainly generated from the shaly source kerogen of Middle Devonian. So the main reason why the gas has high N₂ and heavier carbon isotopic values is that the gas accumulated in the late stage when the gas was generated from high to over mature Middle Devonian source rock.

Key words： Gas component; Gas isotope; Gas genesis; Nanpangjiang basin.

Cite this article

ZHANG Shu-pin,ZHAO Meng-jun,ZHANG Shui-chang, ZHAO Ling,LIU Pei-chu . THE GENESIS AND GEOCHEMICAL CHARACTERISTICS OF NATURAL GAS IN WELL YANG-1 IN NANPANJIANG BASIN[J]. Natural Gas Geoscience, 2005 , 16(6) : 797 -803 . DOI: 10.11764/j.issn.1672-1926.2005.06.797

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