The Changing and Origin of the Carbon Dioxide in Associated Gas of Daqing Placanticline

Abstract

Abstract: The CO₂ content in associated gas of Daqing placanticline has increased greatly since the 1990s, reaching the total amount of 2.87%(V/V) in 2003, increasing about ten times compared with that in the 1980s, and the rising trend will be maintained.By determination of the δ₁₃ C of CO₂ in associated gas shows that it is bigger than +3‰ for three samples, indicating that the origin of this CO₂ is the pyrolysis of carbonate.The reason of the increase of CO₂ content is mostly related with frequency of new-tectonic movement and the rising of heat flow from the deep earth.

Key words: Daqing placanticline, associated gas, carbon isotope, origin, metamorphism

CLC Number:

TE331.3

WANG Lian-sheng, GUO Zhan-qian, MA Zhi-hong, CHI Dong-hui, WANG Pu-jun, WANG Shu-xue. The Changing and Origin of the Carbon Dioxide in Associated Gas of Daqing Placanticline[J]. Xinjiang Petroleum Geology, 2005, 26(6): 612-613.

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The Changing and Origin of the Carbon Dioxide in Associated Gas of Daqing Placanticline

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