松辽盆地庆深气田天然气成因类型鉴别

杨春; 刘全有; 周庆华; 李剑; 冯子辉; 李志生

Volume 34 Issue 5

Sep. 2009

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Article Navigation > Earth Science > 2009 > 34(5): 792-798

YANG Chun, LIU Quan-you, ZHOU Qing-hua, LI Jian, FENG Zi-hui, LI Zhi-sheng, 2009. Genetic Identification of Natural Gases in Qingshen Gas Field, Songliao Basin. Earth Science, 34(5): 792-798.

Citation:

YANG Chun, LIU Quan-you, ZHOU Qing-hua, LI Jian, FENG Zi-hui, LI Zhi-sheng, 2009. Genetic Identification of Natural Gases in Qingshen Gas Field, Songliao Basin. Earth Science, 34(5): 792-798.

YANG Chun, LIU Quan-you, ZHOU Qing-hua, LI Jian, FENG Zi-hui, LI Zhi-sheng, 2009. Genetic Identification of Natural Gases in Qingshen Gas Field, Songliao Basin. Earth Science, 34(5): 792-798.

Citation:

YANG Chun, LIU Quan-you, ZHOU Qing-hua, LI Jian, FENG Zi-hui, LI Zhi-sheng, 2009. Genetic Identification of Natural Gases in Qingshen Gas Field, Songliao Basin. Earth Science, 34(5): 792-798.

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Genetic Identification of Natural Gases in Qingshen Gas Field, Songliao Basin

1.
Department of Earth Sciences, Zhejiang University, Hangzhou 310027, China
2.
Exploration and Production Research Institute, SINOPEC, Beijing 100083, China
3.
Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China
4.
Langf ang Branch, Research Institute of Petroleum Exploration and Development, PetroChina, Langfang 065007, China
5.
Daqing Oil Company, PetroChina, Daqing 163712, China

Received Date: 2009-02-20
Publish Date: 2009-09-25

Abstract

Abstract

According to measurement of carbon isotopes of gaseous alkanes thermally cracked from the hydrocarbon sources and oil under closed system pyrolysis, the results suggest that the reversal occurrence for carbon isotopes of heavy gaseous alkanses (δ¹³C₂ > δ¹³C₃ > δ¹³C₄) would be caused by single thermal dynamics, whereas the reversal trends of δ¹³C₁ and δ¹³C₂ (δ¹³C₁ > δ¹³C₂) could not be observed.The natural gases in the Qingshen gas field are characterized by the less negative δ¹³C₁ values, reversal series of carbon isotopes for gaseous alkanes and high R/Ra values (R/Ra > 1.0), indicating natural gases should have stemmed from multi-sources.Based on the correlation of R/Ra and CO₂/³He, R/Ra and CH₄/³He, the genesis of natural gases from the Qingshen gas field were identified.The hydrocarbon gases in the Qingshen gas field are a mixture of alkanes, in which the heavy gaseous alkanes were derived from the thermal decomposition of organic matters due to the high geothermal gradient, whereas mixing of inorganic methane into organic gas caused the reversal of the carbon isotopic trend of CH₄ and C₂H₆.
- Qingshen gas field,
- pyrolysis experiment,
- carbon isotope,
- inorganic gas,
- organic gas

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References(49)

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