成都理工大学学报（自然科学版）2011，Vol.38Issue(2)：191-198,8.
柴达木盆地德令哈拗陷中侏罗统烃源岩有机地球化学特征
Organic geochemical characteristics of Middle Jurassic hydrocarbon source rocks in Delingha depression of Qaidam Basin
陈迎宾 1张寿庭2
作者信息
- 1. 同济大学海洋与地球科学学院,上海200092
- 2. 中国石油化工股份有限公司无锡石油地质研究所,江苏无锡,214151
- 折叠
摘要
Abstract
Middle Jurassic is the main layer system of hydrocarbon source rocks which develops widely in the Delingha depression. Field geological survey and organic geochemical analysis indicate that Middle Jurassic source rocks mainly include oil shale, mudstone, carbonaceous mudstone and coal.The oil shale is a good hydrocarbon-generating rock. Whose mass fraction of organic carbon averages 7.95％ and the type of organic matter is I and Ⅱ. Mudstone has different organic matter abundances,but over 80％ samples whose mass fraction of organic carbon is more than 1％ and over 65％ samples whose mass fraction of organic carbon is more than 1.5 ％. The type of organic matter of mudstone is Ⅱ and Ⅲ 1, and the mudstone is evaluated as poor to moderate source rocks. Carbonaceous mudstone whose mass fraction of organic carbon averages 10. 89 ％ and the type of organic matter is Ⅲ 1 and Ⅲ 2,so it belongs to poor hydrocarbon source rocks. The coal is the worst, and it belongs to a nonhydrocarbon source rock or poor hydrocarbon source rock. Most of the organic matter in the outcrop source rocks belongs to unbaked to low maturity, and a little of the organic matter belongs to maturity. It can be deduced that most of the organic matter in a peak period of oil generation and expulsion has a high maturity in the depression. The composition and the distribution of hydrocarbon compounds indicate that Middle Jurassic belongs to a fresh water deposit environment, and there develops semi-deep lake facies and deep lake facies which are good depositional settings to deploy source rocks in the Delingha depression.关键词
柴达木盆地/德令哈拗陷/中侏罗统/烃源岩Key words
Qaidam basin / Delingha depression/ Middle Jurassic / hydrocarbon source rocks分类
天文与地球科学引用本文复制引用
陈迎宾,张寿庭..柴达木盆地德令哈拗陷中侏罗统烃源岩有机地球化学特征[J].成都理工大学学报（自然科学版）,2011,38(2):191-198,8.
