石油与天然气地质 ›› 1991, Vol. 12 ›› Issue (2): 231-239.doi: 10.11743/ogg19910215

• 论文 • 上一篇    下一篇

珠江口盆地C304-甲基甾烷的研究

裴存民, 张明辉, 沈汝浪, 张俊达, 朱滋芳   

  1. 南海地球化学分析研究公司, 广州
  • 收稿日期:1990-12-27 出版日期:1991-06-25 发布日期:2012-01-16

STUDY ON C304-METHYL STERANES OF PEARL RIVER MOUTH BASIN

Pei Cunmin, Zhang Minghui, Shen Rulang, Zhang Junda, Zhu Zifang   

  1. Nanhai Geochemical Research Company Ltd., Guangzhou
  • Received:1990-12-27 Online:1991-06-25 Published:2012-01-16

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摘要：

用热模拟实验研究了珠江口盆地某钻井中一段下第三系文昌组富含C304-甲基甾烷的泥岩生油岩,证明它是一类热稳定化合物。该段泥岩生油岩是盆内特殊沉积环境下的产物,它为盆地内原油提供了丰富的4-甲基甾烷而成为重要油源之一。对它的深入研究将有助于油源对比和远景评价。此外,当模拟温度为400和500℃时,另外一种构型的4-甲基甾烷被检出,其成因有两种可能性。

关键词: 珠江口盆地, 热模拟实验, 4—甲基甾烷, 热稳定性, 构型, 油源对比

Abstract:

Thermo-simulation was mede on mudstone source rocks of the Wenchang Formation drilled in the Pearl River Mouth Basin. The result indicates that the abundant C30 4-methyl steranes contained in the source rocks were thermally stable. Nevertheless,the source rocks were the products of special dipositional environment,andwere part of the significant oil sources in the basin since they contributed abunhant C30 4-methyl steranes to the crude oils found in the basin. Therefore, it would be much helpful for oil-source correlation and reserve assessment of the basin if a thorough investigation on the source rocks is made. In addition, after 400℃ and 500℃ heating, another configuration of C30 4-methyl steranes was identified from the extracts, of which the origin may have two probabilities.