柴达木盆地北缘侏罗系烃源岩沉积有机相划分及评价

彭立才; 杨慧珠; 刘兰桂; 吕宗伦; 保吉成

doi:10.11743/ogg20010221

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柴达木盆地北缘侏罗系烃源岩沉积有机相划分及评价
CLASSIFICATION AND ESTIMATION OF ORGANIC FACIES IN JURASSIC SOURCE ROCKS FROM NORTH MARGIN, CHAIDAMU BASIN
2001年22卷第2期页码：178-181
网络首发：2001-06-25，

纸质出版：2001
DOI： 10.11743/ogg20010221
稿件说明：

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彭立才, 杨慧珠, 刘兰桂, 等. 柴达木盆地北缘侏罗系烃源岩沉积有机相划分及评价[J]. 石油与天然气地质, 2001,22(2):178-181. DOI： 10.11743/ogg20010221.

彭立才, 杨慧珠, 刘兰桂, et al. CLASSIFICATION AND ESTIMATION OF ORGANIC FACIES IN JURASSIC SOURCE ROCKS FROM NORTH MARGIN, CHAIDAMU BASIN[J]. 2001, 22(2): 178-181. DOI： 10.11743/ogg20010221.

摘要

根据柴达木盆地北缘侏罗系烃源岩的有机岩石学、沉积学和有机地球化学特征将烃源岩的沉积有机相划分为4种类型

即高位泥炭沼泽有机相、森林泥炭沼泽有机相、滨浅湖有机相和半深湖-较深湖有机相.在4种沉积有机相类型中

半深湖-较深湖有机相腐泥组含量最高

有机质类型属Ⅰ

或Ⅰ

型

生烃性最好并以生油为主;滨浅湖有机相是煤系烃源岩的主体部分

腐泥组含量较低

有机质类型以Ⅱ型和Ⅲ

型为主

生烃性变化较大

泥岩生烃性中等到差

碳质泥岩大部分生烃性较差;森林泥炭沼泽有机相镜质组含量较高

有机质类型主要为Ⅲ

型

其生烃性相对较差

以生气为主;高位泥炭沼泽有机相惰质组含量高

有机质类型主要为Ⅲ

型

其生烃能力最差

以生气为主.

Abstract

The Jurassic hydrocarbon source rocks on the north margin of Qaidam Basin could be divided into highstand marsh peat organic facies

forest marsh peat organic fades

shore-shallow lake organic facies and semideep-deep lake organic facies. The first facies contains high inertinite contents

its organic matter is mainly Ⅲ

-type

its hydrocarbon-generation capacity is the lowest and gas is the main product; the second facies contains high viitrinite and Ⅲ

-type organic matter

It hydrocarbon generation capacity is relatively low with gas is the main product; the third facies is primarily coal measures with lower sapropelinite. Its organic' matter is mainly Ⅱ-and Ⅲ

-types with lower to poor hydrocarbon generation capacity; the last facies has the highest sapropelinite

the organic matter is Ⅰ

-or Ⅰ

types with the best oil generation capacity