石油与天然气地质 ›› 2001, Vol. 22 ›› Issue (1): 13-16.doi: 10.11743/ogg20010103

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塔里木盆地石炭系烃源岩热模拟实验研究——Ⅱ.生物标志化合物的组成和演化

段毅, 周世新   

  1. 中国科学院兰州地质研究所气体地球化学国家重点实验室, 甘肃兰州730000
  • 收稿日期:2000-03-27 出版日期:2001-03-25 发布日期:2012-01-16
  • 基金资助:

    本论文为国家自然科学基金(40072040)、中国科学院环境领域知识创新工程重要方向(KZCX2-111)和中国科学院知识工程项目联合资助.

STUDY ON THERMAL SIMULATION OF CARBONIFEROUS SOURCE ROCKS IN TARIM BASIN: Ⅱ COMPOSITION AND EVOLUTION OF BIOMARKERS

Duan Yi, Zhou Shixin   

  1. State Key Lab. of Gas Geochemistry, Lanzhou Institute of Geology, Academy of Science, Lanzhou, Gansu
  • Received:2000-03-27 Online:2001-03-25 Published:2012-01-16

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摘要：

塔里木盆地群井巴楚组(C1b)的泥岩和灰岩中,生物标志化合物可分为两大类:(1)正构烷烃和类异戊二烯烷烃类;(2)三环和五环萜类.不同的模拟温度点具有不同的生物标志化合物组合,与以往的其他模拟实验结果类似.生物标志化合物的不同组合除源于生油岩中生物标志化合物不同外,还取决于无机元素的催化作用.不同的生油岩中,生物标志化合物先质存在差异,并且在不同的热演化阶段,释放出不同强度的生物标志化合物.因此,可以根据生物标志化合物的组成特征进行油源对比.塔里木盆地石炭系生油岩生成的原油,其三环萜烷C21/C23比值一般大于1,明显区别于寒武-奥陶系生油岩生成的原油(C21/C23<1),由此判断曲1井原油可能来自石炭系泥岩生油岩.

关键词: 烃源岩, 热模拟实验, 生物标志化合物, 石炭系, 塔里木盆地

Abstract:

The biomarker compounds of the Bachu Formation mudstone and limestone collected from Qu-4 Well in Tarim Basin could be divided into two types:1.n-alkanes and isoprenoid alkanes;2.tricyclic terpane and pentacyclic terpane.Thermal simulation was made and the results suggest that,different simulation temperatures had different biomarker compound combinations.This was similar to that of the simulation made before.According to the oil-source comparison,the ratio of tricyclic terpane C21/C23 in the crude oil generated from Carboniferous source rocks is usually greater than one,this differs distinctly from that in the crude oil generated from Cambrian-Ordovician source rocks(C21/C23 <1).It is suggested that the oil drilled in Qu-1 Well may be derived from Carboniferous mudstone.

Key words: hydrocarbon source rock, thermal simulation, biomarker, Carboniferous, Tarim Basin

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