珠江口盆地C<sub>30</sub>4-甲基甾烷的研究

裴存民; 张明辉; 沈汝浪; 张俊达; 朱滋芳

doi:10.11743/ogg19910215

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珠江口盆地C₃₀4-甲基甾烷的研究
STUDY ON C₃₀4-METHYL STERANES OF PEARL RIVER MOUTH BASIN
1991年12卷第2期页码：231-239
网络首发：1991-06-25，

纸质出版：1991
DOI： 10.11743/ogg19910215
稿件说明：

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裴存民, 张明辉, 沈汝浪, 等. 珠江口盆地C₃₀4-甲基甾烷的研究[J]. 石油与天然气地质, 1991,12(2):231-239. DOI: 10.11743/ogg19910215. DOI：

Pei Cunmin, Zhang Minghui, Shen Rulang, et al. STUDY ON C₃₀4-METHYL STERANES OF PEARL RIVER MOUTH BASIN[J]. 1991, 12(2): 231-239. DOI: 10.11743/ogg19910215. DOI：

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C

4-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。

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 C

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 C

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 C

4-methyl steranes was identified from the extracts

of which the origin may have two probabilities.