天然气地球化学

北部湾盆地福山凹陷天然气成因与来源

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  • (1.中国石油大学石油天然气成藏机理教育部重点实验室,资源与信息学院,北京 102200;
    2.中国南方石油勘探开发公司,广东 广州 510240;3.中国科学院广州地球化学研究所,广东 广州 510640)
李美俊(1972-),男,博士,讲师,从事有机地球化学和环境化学的科研与教学工作.

收稿日期: 2006-09-27

  修回日期: 2007-02-06

  网络出版日期: 2008-06-20

基金资助

国家自然科学基金项目“海南岛福山凹陷花场凝析油气田的烃类生成及其伴生非烃气体的成因”(编号:40672093)资助.

GENESIS AND SOURCE OF NATURAL GAS IN THE FUSHAN DEPRESSION, BEIBU WAN BASIN

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  • (1.Key Laboratory for Hydrocarbon Accumulation Mechanism of the Chinese Ministr y of Education, Earth Sciences and Geoinformatics School, China Petroleum University, Beijing 102249, China; 2.South Oil Exploration and Development Company of PetroChina, Guangzhou, 510640; 3.Guangzhou Institute of Geochemistry,
    Chinese Academy of\=Sciences, Guangzhou 510640, China)

Received date: 2006-09-27

  Revised date: 2007-02-06

  Online published: 2008-06-20

摘要

利用(δ13C2-δ13C3)-C2/C3(mol/mol)关系、“天然气曲线”和天然气C7-重烃三角图对海南福山凹陷天然气的成因和来源进行了研究,结果表明福山凹陷天然气主要为干酪根生烃高峰到湿气阶段的产物;天然气和该区原油同源,都来自流沙港组Ⅱ-Ⅲ型有机质;天然气没有遭受明显的次生变化,受运移效应的影响也较弱;花场地区天然气主要来自白莲次凹,而Hx4井和H3/4井的天然气可能有来自皇桐次凹的贡献。认为(δ13C2-δ13C3)-C2/C3(mol/mol)关系图和“天然气曲线”是研究天然气成因与来源的有效方法。

本文引用格式

李美俊;王铁冠;刘 菊;张梅珠;卢 鸿;马庆林;高黎惠 . 北部湾盆地福山凹陷天然气成因与来源[J]. 天然气地球科学, 2007 , 18(2) : 260 -265 . DOI: 10.11764/j.issn.1672-1926.2007.02.260

Abstract

By using (δ13C2-δ13C3) versus C2/C3(mol/mol) plot and “natural gas plot”, and the ternary diagram of C7-hydrocarbon of natural gas, this paper studies the genesis and source of the natural gas discovered in the Fushan depression, Hainan. It shows that the gaseous hydrocarbons in the Fushan depression are mainly generated by kerogen from the hydrocarbon generating peak stage to the wet gas stage. The gases and associated oils are derived from the same source kitchen of Liushagang formation, which is dominated by type Ⅱ-Ⅲ kerogens. The natural gases had not undergone significant secondary alteration and migration fractionation. The natural gas in the Huachang area is mainly derived from the Bailian subdepression (sag). The gas in HX4 and H3/4 wells, however,may be partly from the Huangtong sub/depression. The (δ13C2-δ13C3) versus C2/C3 (mol/mol) plot and “natural gas plot” are successfully applied to the study of genesis and source of natural gas in the Fushan depression.

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