收稿日期: 2008-09-08
修回日期: 2009-01-06
网络出版日期: 2009-02-10
基金资助
中国海洋石油总公司综合科研项目（编号：海油科字（2004）37号）资助.
Origin of Ring Preference of Light Hydrocarbons in Continental Petroleum, Pearl River Mouth Basin
Received date: 2008-09-08
Revised date: 2009-01-06
Online published: 2009-02-10
珠江口盆地淡水中深湖相烃源岩所生成原油的轻烃中三环优势（3PR）大于五环优势（5PR）和六环优势（6PR）,而其煤系烃源岩所生成原油的轻烃中三环优势（3PR）较小,五环和六环优势（5PR+6RP）较大;淡水中深湖相烃源岩中过渡金属及其配位体结构有利于速率常数k3,Ⅰ型和Ⅱ1型干酪根有利于形成三环优势（3PR）,生成的原油C7轻烃中链烷烃含量较高,而煤系烃源岩中过渡金属及其配位体结构有利于速率常数k5+k6,Ⅱ2型和Ⅲ型干酪根有利于形成五环和六环优势（5PR+6RP）,生成的原油C7轻烃中环烷烃和芳烃含量较高。
朱俊章 施和生 汪建蓉 龙祖烈 . 珠江口盆地陆相原油轻烃环优势及其成因[J]. 天然气地球科学, 2009 , 20(1) : 15 -19 . DOI: 10.11764/j.issn.1672-1926.2009.01.15
Based on the data of the 28 continental oils in Pearl River Mouth Basin, the three-ring preference (3RP) is greater than 5RP and 6RP in LHs from fresh water lacustrine facies source rocks. The three-ring preference (3RP) is less than 5RP and 6RP in LHs from coal-measures source rocks. The transition metals and their structures of the surrounding ligands in fresh water lacustrine facies source rocks are favor to k3(velocity constant).Kerogen Ⅰand Ⅱ1 are favorable to forming the 3RP, higher content of C7-isoalkanes exist in the LHs. The transition metals and their structures of the surrounding ligands in coal-measures source rock are favor to k5 and k6,kerogenⅡ2 and III are likely to form 5RP and 6RP,LHs contain high amount of C7-cycloalkanes and toluene.
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