摘要
高纯度的CO2气藏不仅具有重要的资源意义,同时也有很重要的地质意义,CO2地质问题是当前地球科学的前沿和热点问题。CO2的成因可以分为无机成因和有机成因两大类,有机成因的CO2是有机质在不同的地球化学作用中形成的,无机成因的CO2是无机矿物或元素在有关化学作用中形成的。CO2成因的判别主要是根据天然气中稀有气体丰度及同位素比值等地球化学方法并结合天然气成藏地质条件来探讨。CO2与烃类气体相比,其运移和聚集规律有其相似的方面,但由于CO2固有的物理化学特征和一些特殊的形成过程,导致CO2与烃类气体的运聚成藏有所不同。本文对CO2的成因和地球化学指标、运聚成藏特征及CO2气藏勘探方法进行了较为系统的论述。
High-purity carbon dioxide(CO2) gas reservoir is not only an important resource,but also has significant geological meanings.Carbon dioxide geology is a frontier of geosciences.The origins of CO2 are divided into two categories: inorganic and organic.The CO2 of organic origin was generated from organic matters by different geochemical actions;the CO2 of inorganic origin was generated from inorganic mineral or elements by related chemical actions.The origins of CO2 are discriminated according to rare gas abundance and isotope ratio and combining with geological conditions of gas accumulation.There are some similarities in migration and accumulation comparing CO2 with hydrocarbon gas,but there also some difference because of the intrinsic physical and chemical characteristics and special genetic process of CO2.This paper systematically discusses the origin,geochemical index,migration and accumulation,and exploration method of CO2 gas reservoir.
出处
《特种油气藏》
CAS
CSCD
2007年第5期7-12,16,共7页
Special Oil & Gas Reservoirs
基金
国家自然科学基金(No.40503003)
中国石油天然气集团公司创新基金(2002F70108)
关键词
CO2气藏
成因
成藏研究
勘探方法
综述
Carbon dioxide(CO2)
origin
accumulation
exploration method
overview
