收稿日期: 2009-04-06
修回日期: 2009-05-28
网络出版日期: 2009-10-10
基金资助
国家自然科学基金项目（编号：40573030）资助.
Geochemical Characteristics of Light Hydrocarbons in Tuha Basin
Received date: 2009-04-06
Revised date: 2009-05-28
Online published: 2009-10-10
梁婉如,张敏,赵红静 . 吐哈盆地原油轻烃地球化学特征[J]. 天然气地球科学, 2009 , 20(5) : 763 -767 . DOI: 10.11764/j.issn.1672-1926.2009.05.763
The compositional characteristics of light hydrocarbons, Mango parameter and maturity for 23 crude oil samples in the Tuha basin were studied systematically. The results show that the crude oils are rich in cyclanes, and the straight chain alkanes content is very low, dominated by terrestrial organic matter. The MCHI indicates that the crude oils contain Type Ⅲ kerogen. N61/N51and(N61+N51)/（P2+P3+ N2 ratios of light hydrocarbon compounds have different molecular structural type, suggesting that the crude oils belong to terrestrial oils. Compositional characteristics of C7 light hydrocarbon fractions show that the methylcyclohexane content is higher than 50%, the dimethylcyclopentane content is lower than 9%, the heptane content is lower than 40%. The data is characteristic of coal generated oils and mixed crude oils. The Heptane values and isoheptane values indicate that the crude oils are in the normal mature stage. The maximum generating temperature of the crude oils is between 91.16℃ and 102.22℃.
Key words： Tuha basin; Crude oil; Light hydrocarbon; Steady state catalysis; Geochemistry.
［1］王祥,张敏,黄光辉.典型海相油和典型煤成油轻烃组成特征及地球化学意义[J].天然气地球科学，2008，19（1）：18-22.
［2］Leythaeuser D,Schaefer R G,Cornford C,et al.Generation and migration of light hydrocarbon(C2—C7） in sedimentary basins[J].Organic Geochemistry ,1979 ,1(14):191-204.
［3］Snowdon L R.Immature oil and condensate-modification of hydrocarbon generation model for terrestrial organic matter[J].AAPG Bulletin,1982,66(6):775-788.
［4］王祥,张敏,刘玉华.塔中北斜坡原油轻烃组成及地球化学特征[J].天然气地球科学，2008，19（5）：713-717.
［5］张敏,林壬子,梅博文.油藏地球化学——塔里木盆地库车含油气系统研究[M].重庆：重庆大学出版社，1997.
［6］胡惕麟,戈葆雄,张义纲,等.源岩吸附烃和天然轻烃指纹参数的开发和应用[J].石油实验地质,1990,12(4）：378-379.
［7］朱扬明,张春明.Mango 轻烃参数在塔里木原油分类中的应用[J].地球化学，1999，28（1）：26-33.
［8］程克明,金伟明,何忠华,等.陆相原油及凝析油的轻烃单体组成特征及地质意义[J].石油勘探与开发，1987，(1):34-43.
［9］Bement W O ,Levey R A ,Mango F D.The temperature of oilgeneration as defined with C7 chemistry maturity parameter(2,4-DMP/2,3-DMP)[M]//Grimalt J O,Dor-ronsoro C.Organic Geochemistry:Development and Applications to Energy, Climate, Environment and Human History.Donostian-San Sebastian: European Association of OrganicGeochemists, 1994: 505-507.
/
| 〈 |
|
〉 |
甘公网安备 62010202000678号