塔里木盆地原油C<sub>5</sub>—C<sub>13</sub>轻馏分组成及其地球化学意义

李洪波, 王铁冠

doi:10.11764/j.issn.1672-1926.2014.12.2003

天然气地球科学 >

2014 , Vol. 25 >Issue 12: 2003 - 2013

DOI: https://doi.org/10.11764/j.issn.1672-1926.2014.12.2003

天然气地球化学

塔里木盆地原油C₅—C₁₃轻馏分组成及其地球化学意义

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1.长江大学油气资源与勘探技术教育部重点实验室，湖北武汉 430100；
2.长江大学地球环境与水资源学院，湖北武汉 430100；
3.中国石油大学(北京)油气资源与探测国家重点实验室，北京 102249

李洪波(1981-)，男，湖北宜昌人，副教授，博士，主要从事油气地球化学教学与研究.E-mail:lihbyu@126.com.

收稿日期: 2013-12-16

修回日期: 2014-03-12

网络出版日期: 2019-09-18

基金资助

高等学校博士学科点专项科研基金新教师类资助课题(编号：20124220120001)资助.

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Molcular Composition of the C₅—C_13;Light Hydrocarbon in the Crude Oil from Tarim Basin and Its Geochemical Significance

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1.Key Laboratory of Exploration Technologies for Oil and Gas Resources,Ministry of Education,
Yangtze University,Wuhan 430100,China；3.State Key Laboratory of Petroleum Resources and
Prospecting,China University of Petroleum,Beijing 102249,China；
2.School of Earth Environment and Water Resource,Yangtze University,Wuhan 430100,China

Received date: 2013-12-16

Revised date: 2014-03-12

Online published: 2019-09-18

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摘要

原油 C₅—C₁₃轻馏分中C₈以上组成一直是油气地球化学研究中的薄弱环节。对塔里木盆地40个海相油、湖相油与煤成油样品的C₅—C₁₃轻馏分进行了全烃气相色谱定量分析，在前人研究的基础上，结合C₇轻烃组成，对比分析了不同成因类型原油C₅—C₁₃轻馏分族组成特征。大涝坝油气田湖相油的环烷烃含量较高，雅克拉油气田海相油的支链烷烃含量较高，轮台地区和库车坳陷部分煤成油则具有较高的芳烃含量，塔东地区寒武系来源油与上述特征差异迥然，自成一体。优选出的C_7-C₉轻烃族组成参数可较好地区分大涝坝(N/I较高)、雅克拉(I/P较高)、轮台和库车(A/P较高)与塔东(最大I/P和N/P)等地区的原油。针对单体化合物建立的 C₈轻烃新指标 11DMCYC₆/(ctc124TMCYC₅+ctc123TMCYC₅ +cct124TMCYC₅)值与(m-+p-)Xyl/nC₈值可较好区分塔里木盆地海相油、湖相油与煤成油。

关键词： 塔里木盆地; C₅—C₁₃轻馏分; 轻烃; 原油; 地球化学

本文引用格式

李洪波, 王铁冠 . 塔里木盆地原油C₅—C₁₃轻馏分组成及其地球化学意义[J]. 天然气地球科学, 2014 , 25(12) : 2003 -2013 . DOI: 10.11764/j.issn.1672-1926.2014.12.2003

Abstract

The research about C₈+ in C₅—C₁₃ light hydrocarbons is very poor in oil and gas geochemistry.Based on the gas chromatography quantitatively analysis of C₅—C₁₃ light hydrocarbons of 40 marine,lacustrine and coal-formed crude oils in Tarim Basin,the group composition of C₅—C₁₃light hydrocarbons have been analyzed.Naphthenes is relatively abundant in crude oils from the Dalaoba oilfield,branched-alkanes are more enriched in crude oils from the Yakela oilfield,while aromatics in C₅—C₁₃ light hydrocarbons are more concentrated in some oil samples from the Luntai region and the Kuqa Depression.Oils derived from Cambrian source rocks are completely different from the above characteristics.A series of parameters of C_7-C₉ light hydrocarbons are preferably selected to distinguish crude oils from Dalaoba (with high N/I),Yakela (with high I/P) and Luntai Oilfields and Kuche Depression (with highest I/P and N/P),respectively.According to the compounds, 11DMCYC₆/(ctc124TMCY C₅+ctc123TMCY C₅+cct124TMCY C₅) and (m-+p-)Xyl/nC₈ new index can be applied to distinguish marine,lacustrine and coal-formed crude oils in Tarim Basin.

Key words： Tarim Basin; C₅—C₁₃light hydrocarbon fraction; Light hydrocarbon; Crude oil; Geochemistry

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