摘要
研究了鄂尔多斯盆地流体包裹体的CO2成因及其与油气演化的关系,应用同位素分馏方程计算了奥陶系碳酸盐岩脉流体包裹体中CO2的碳同位素值和H2O的氧同位素值。结果表明,其碳、氧同位素值分别为-1.64‰^-11.15‰和-22.12‰^-33.06‰。该包裹体的CO2以无机成因为主,其碳同位素组成形成于100℃~160℃的条件下,对应于油气演化的成熟—高成熟阶段。
The origin of carbon dioxide in fluid inclusions and the evolution of oil and gas in Ordos Basin were studied. The values of carbon isotope of carbon dioxide and oxygen isotope of water in fluid inclusions of the Ordovician carbonate veins were calculated by the isotopic fractionation equation. The values of carbon isotope of carbon dioxide and oxygen isotope of water in fluid inclusions are minus 1.64‰ to minus 11.15‰ and minus 22. 12‰ to minus 33.06‰,respectively. The leading origin of carbon dioxide in fluid inclusions is inorganic. The carbon isotope composition of carbon dioxide was generated under homogenization temperature from 100℃ to 160℃ corresponding to the mature-to-high mature oil-gas evolution stage.
出处
《石油学报》
EI
CAS
CSCD
北大核心
2007年第3期68-74,79,共8页
Acta Petrolei Sinica
基金
国家自然科学基金(No40472074)
国家重点基础研究发展规划项目(2001CB209133)资助
关键词
鄂尔多斯盆地
流体包裹体
油气演化
碳氧同位素
CO2成因
Ordos Basin
fluid inclusion
oil-gas evolution
carbon and oxygen isotope
origin of carbon dioxide
