川东华蓥黄龙组沥青有机地球化学及油源对比

doi:10.11885/j.issn.1674-5086.2019.09.27.01

西南石油大学学报(自然科学版) ›› 2021, Vol. 43 ›› Issue (2): 54-64.DOI: 10.11885/j.issn.1674-5086.2019.09.27.01

川东华蓥黄龙组沥青有机地球化学及油源对比

何磊^1,2, 杨平^1,2, 谢渊^1,2, 汪正江^1,2, 刘家洪^1,2

1. 中国地质调查局成都地质调查中心, 四川成都 610081;
2. 自然资源部沉积盆地与油气资源重点实验室, 四川成都 610081

收稿日期:2019-09-27 出版日期:2021-04-10 发布日期:2021-04-23
通讯作者: 杨平,E-mail:yping@163.com
作者简介:何磊,1992年生,男,汉族,四川西充人,硕士,主要从事海外油气勘探、构造地质学、石油地质学等方面的研究。E-mail:heleissg@163.com
杨平,1981年生,男,汉族,湖北荆门人,高级工程师,主要从事层海外油气勘探、沉积学和南方海相石油地质等方面的研究。E-mail:yping@163.com
谢渊,1971年生,男,汉族,四川南部人,研究员,主要从事水文地质学、沉积地质学和石油地质等方面的研究。E-mail:chdxyuan@sina.com
汪正江,1969年生,男,汉族,安徽六安人,教授级高级工程师,主要从事沉积地质、地球化学和石油地质学等方面的研究。E-mail:wzjcf@sina.com
刘家洪,1983年生,男,汉族,四川成都人,工程师,主要从事沉积学、地球化学和石油地质学等方面的研究。E-mail:66955408@qq.com
基金资助:
中国地质调查局项目（12120114071401）

Organic Geochemical Characteristics and Oil Source Comparison of Bitumen from Huanglong Formation of Huaying in Eastern Sichuan Basin

HE Lei^1,2, YANG Ping^1,2, XIE Yuan^1,2, WANG Zhengjiang^1,2, LIU Jiahong^1,2

1. Chengdu Center of China Geological Survey, Chengdu, Sichuan 610081, China;
2. Key Laboratory for Sedimentary Basin and Oil and Gas Resouces, Ministry of Natural Resources, Chengdu, Sichuan 610081, China

Received:2019-09-27 Online:2021-04-10 Published:2021-04-23

摘要/Abstract

摘要： 华蓥溪口镇石炭系黄龙组白云岩孔洞中充填大量固体沥青，野外采集了沥青及不同烃源岩层系样品，进行了沥青有机地球化学特征研究及来源分析。结果表明，黄龙组沥青白云岩有机碳含量较高，R_o为1.45%~1.48%，碳同位素-28.90‰（PDB），饱和烃及芳烃含量较低，以非烃为主；正构烷烃主峰碳为C₂₀，Pr/Ph为0.78~0.79，三环萜烷中C₂₃ > C₂₄ > C₂₁，三环萜烷/五环萜烷为0.82~1.06，甾烷中C₂₇ > C₂₉ > C₂₈，其中，C₂₇规则甾烷占优势，表明黄龙组沥青生烃母质以低等水生生物为主，为还原环境。萜烷参数及Ts/（Tm+Ts）均表明沥青成熟度较高。DBT/P为1.48~1.88，表明母岩可能为海相泥灰岩沉积。经生物标志物及沥青同位素综合对比，认为黄龙组固体沥青来自于龙马溪组页岩，氯仿沥青“A”抽提物具有混源特点，可能为龙马溪组页岩和栖霞组泥灰岩共同贡献的结果。

关键词: 黄龙组, 沥青, 地球化学特征, 油源对比, 华蓥溪口

Abstract: The void of the dolomite of Huanglong Formation in section of Xikou town of Huaying are filled with a large amount of bitumen, in the field, samples of asphalt and source rocks of different strata were collected in the study area and adjacent areas to explore the organic geochemical characteristics and sources of bitumen.The results show that the content of organic carbon in the bitumen-bearing dolomite of Huanglong Formation is high, the value of R_o is 1.45% to 1.48%, the value of carbon isotope is -28.90‰, the content of saturated hydrocarbon and aromatic hydrocarbon are low, mainly non-hydrocarbon; the main peak carbon of paraffins is C₂₀, the value of Pr/Ph ratios from 0.78 to 0.79, the content of tricyclic terpanes C₂₃ > C₂₄ > C₂₁, the ratio of tricyclic terpanes to pentacyclic terpanes are from 0.82 to 1.06, in Sterane, the content of C₂₇ > C₂₉ > C₂₈, C₂₇ gonane is dominant, these parameters indicate that the sedimentary environment is reductive. The value of terpane parameters and Ts/(Tm+Ts) all indicate high maturity of bitumen. The value of DBT/P is from 1.48 to 1.88, indicating that the parent rock may be Marine marl deposit. According to the comprehensive comparison of biomarkers and bituminous isotopes, it is considered that the solid bitumen of Huanglong Formation comes from the earlier mature shale of Longmaxi Formation, the extraction of chloroform bitumen "A" has the characteristics of mixed source, which may contribute to the shale of Longmaxi Formation.

Key words: Huanglong Formation, bitumen, geochemical characteristics, comparison of oil and source, Xikou town in Huaying

中图分类号:

TE122

何磊, 杨平, 谢渊, 汪正江, 刘家洪. 川东华蓥黄龙组沥青有机地球化学及油源对比[J]. 西南石油大学学报(自然科学版), 2021, 43(2): 54-64.

HE Lei, YANG Ping, XIE Yuan, WANG Zhengjiang, LIU Jiahong. Organic Geochemical Characteristics and Oil Source Comparison of Bitumen from Huanglong Formation of Huaying in Eastern Sichuan Basin[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2021, 43(2): 54-64.

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川东华蓥黄龙组沥青有机地球化学及油源对比

Organic Geochemical Characteristics and Oil Source Comparison of Bitumen from Huanglong Formation of Huaying in Eastern Sichuan Basin

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