【摘要】：為探討塔里木盆地原油類型和油源問(wèn)題,運(yùn)用色譜-同位素質(zhì)譜分析技術(shù),分析了該盆地塔中、塔北、塔東與庫(kù)車地區(qū)的典型原油輕烴單體烴碳同位素組成。結(jié)果表明,不同結(jié)構(gòu)輕烴化合物中,支鏈烷烴與環(huán)己烷系列比環(huán)戊烷系列更具明顯的成因判識(shí)意義。2-甲基環(huán)戊烷2 mC_5、3-甲基環(huán)戊烷3 mC_5、3-甲基環(huán)己烷3 mC_6、環(huán)己烷CYC6與甲基環(huán)己烷mCYC_6等化合物的δ~(13)C在煤成油最高,δ~(13)C大于-21‰;湖相油次之,δ~(13)C位于-25‰~-22‰之間;再次之為寒武系-下奧陶統(tǒng)海相原油,δ~(13)C位于-27‰~-21‰之間,最輕的為上奧陶統(tǒng)海相原油,δ~(13)C小于-28‰。其碳同位素值可以較好的判別該盆地寒武系-下奧陶統(tǒng)海相油、上奧陶統(tǒng)海相油、湖相油與煤成油。優(yōu)選的8個(gè)特征化合物碳同位素可以作為原油成因類型的劃分標(biāo)志,尤其是2-甲基環(huán)戊烷2 mC_5、3-甲基環(huán)戊烷3 mC_5、3-甲基環(huán)己烷3 mC_6、環(huán)己烷CYC6與甲基環(huán)己烷mCYC_6等化合物。特征輕烴化合物的碳同位素組成可成為不同成因原油的劃分標(biāo)志。
[Abstract]:In order to discuss the types and sources of crude oil in Tarim Basin, the hydrocarbon carbon isotopic compositions of typical light hydrocarbon monomers in Tarim Basin, Tarim Basin, Tarim Basin, Tarim Basin and Kuqa area were analyzed by means of chromatography-isotope mass spectrometry. The results show that, in the light hydrocarbon compounds with different structures, Branch-chain alkanes and cyclohexane series have more significant genetic significance than cyclopentane series. The 未 ~ (13) C of 2-methylcyclopentane 2 mC5H, 3-methylcyclopentane 3mC5C, 3-methylcyclohexane 3mC6, cyclohexane CYC6, methylcyclohexane mCYC_6 and other compounds are found in coal-derived oil. The highest 未 ~ (13) C > -21 鈥，

本文編號(hào)：2199134