摘要
大庆长垣伴生气中CO2的含量自20世纪90年代开始有较大幅度的增加,2003年伴生气中CO2的含量(总外输)已达2.87%,与20世纪80年代相比,CO2含量增加了约一个数量级并且还有继续升高的趋势。经过对伴生气中CO2碳同位素(δ13CCO2)的测定,3个样品的数值均大于+3‰,应属无机成因中含碳酸盐岩石的热变质成因。伴生气中CO2含量的增加可能与新构造运动频繁及地球深部热量上涌有关。
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 δ^13C 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.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2005年第6期612-613,626,共3页
Xinjiang Petroleum Geology
基金
国家自然科学基金资助项目
从松辽盆地储层火山岩和流体包裹体探讨无机成因烃类天然气的来源
成藏和资源量(40372066)资助
关键词
大庆长垣
伴生气
碳同位素
成因
变质
Daqing placanticline
associated gas
carbon isotope
origin
metamorphism
