珠江口盆地深水区CO2成因、分布规律与风险带预测

doi:10.7623/syxb201702001

石油学报 ›› 2017, Vol. 38 ›› Issue (2): 119-134.DOI: 10.7623/syxb201702001

• 地质勘探 • 下一篇

珠江口盆地深水区CO₂成因、分布规律与风险带预测

陈红汉¹, 米立军², 刘妍鷨¹, 韩晋阳², 孔令涛¹

1. 中国地质大学资源学院湖北武汉 430074;
2. 中海石油(中国)有限公司深圳分公司广东广州 510240

收稿日期:2016-05-10 修回日期:2016-09-06 出版日期:2017-02-25 发布日期:2017-03-08
通讯作者: 陈红汉,男,1962年9月生,1985年获武汉地质学院石油及天然气地质学专业学士学位,1995年获中国地质大学(武汉)煤及油气地质工学博士学位,现为中国地质大学(武汉)资源学院石油地质系教授、博士生导师,主要从事油气成藏过程与流体包裹体系统分析研究。Email:hhchen@cug.edu.cn
作者简介:陈红汉,男,1962年9月生,1985年获武汉地质学院石油及天然气地质学专业学士学位,1995年获中国地质大学(武汉)煤及油气地质工学博士学位,现为中国地质大学(武汉)资源学院石油地质系教授、博士生导师,主要从事油气成藏过程与流体包裹体系统分析研究。Email:hhchen@cug.edu.cn
基金资助:
国家自然科学基金项目（No.41572118）资助。

Genesis, distribution and risk belt prediction of CO₂ in deep-water area in the Pearl River Mouth Basin

Chen Honghan¹, Mi Lijun², Liu Yanhua¹, Han Jinyang², Kong Lingtao¹

1. Department of Petroleum Geology, China University of Geosciences, Hubei Wuhan 430074, China;
2. Shenzheng Branch, CNOOC(China) Limited, Guangdong Guangzhou 510240, China

Received:2016-05-10 Revised:2016-09-06 Online:2017-02-25 Published:2017-03-08

摘要/Abstract

摘要：

深水区油气勘探高成本要求尽量规避CO₂风险，其风险带的分布预测属世界性难题。在珠江口盆地CO₂和伴生稀有气体组分与同位素组成分析的基础上，查明CO₂来源（幔源岩浆脱气）和成因；在火成岩年龄和气藏⁴⁰Ar/³⁶Ar计算获得的CO₂生成年龄双重约束下，运用与CO₂包裹体同期盐水包裹体均一温度-埋藏史投影法估算了CO₂气藏的充注年龄（14.5~0.3Ma）；通过其运聚模式、分布规律分析与总结，发现了其具有新生代火成岩展布、断裂展布和砂岩输导体系展布及CO₂聚集时限与圈闭形成时空匹配关系等4个主控因素。根据揭示的这一分布规律，预测了深水区恩平组、珠海组和珠江组存在多个NNW向分布的高CO₂风险带，从而为珠江口盆地下一步油气勘探部署规避高CO₂风险带提供了依据。

关键词: CO₂成因和预测, 新生代火成岩, 稀有气体, 深水区, 珠江口盆地

Abstract:

The high cost of oil and gas exploration in deep-water area requires that the risk of CO₂ should be prevented to the greatest extent, and the distribution prediction of its risk belt is a worldwide problem. In this study, the source (degassing of mantle-derived magma) and genesis of CO₂ were identified first based on the analysis of CO₂ and associated rare gas composition and isotope composition in the Pearl River Mouth Basin. Then, under the double restraints of age of igneous rock and the CO₂ generation age obtained from the calculation of ⁴⁰Ar/³⁶Ar in gas reservoir, the injection age (14.5-0.3 Ma) of the CO₂ gas reservoir was estimated using the projection method of homogenization temperature and burial history of the saline water inclusions coeval with CO₂ inclusions. Moreover, through analysis and summary of CO₂ migration and accumulation model and distribution law, it is found that there are four main controlling factors, i.e., Cenozoic igneous rock distribution, fault distribution, sandstone transport system distribution and spatial temporal matching relation of CO₂ accumulation time limit and trap formation. Finally, according to the revealed accumulation and distribution law, it is predicted that there are several NNW-trending high CO₂ risk belts in Enping Formation, Zhuhai Formation and Zhujiang Formation in the deep-water area, providing a reference for avoiding the high CO₂ risk belts in the next deployment of oil and gas exploration in the Pearl River Mouth Basin.

Key words: CO₂ genesis and prediction, Cenozoic igneous rocks, rare gas, deep-water area, Pearl River Mouth Basin

中图分类号:

TE122.1

陈红汉, 米立军, 刘妍鷨, 韩晋阳, 孔令涛. 珠江口盆地深水区CO₂成因、分布规律与风险带预测[J]. 石油学报, 2017, 38(2): 119-134.

Chen Honghan, Mi Lijun, Liu Yanhua, Han Jinyang, Kong Lingtao. Genesis, distribution and risk belt prediction of CO₂ in deep-water area in the Pearl River Mouth Basin[J]. Acta Petrolei Sinica, 2017, 38(2): 119-134.

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珠江口盆地深水区CO₂成因、分布规律与风险带预测

Genesis, distribution and risk belt prediction of CO₂ in deep-water area in the Pearl River Mouth Basin

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