摘要
根据天然气水合物形成的特殊地质条件及分布富集规律,深入剖析了全球天然气水合物成矿成藏气体的地质地球化学特征及主要成因类型与气源构成特点。在此基础上,根据全球迄今勘查发现的天然气水合物地球化学分析统计结果及其形成的地质条件综合分析,指出全球天然气水合物成因类型主要以生物成因、生物—热解混合成因为主,热解成熟成因次之,其成矿成藏气体主要来自生物气和生物—热解成熟混合气的供给;而天然气水合物形成富集的决定性因素则取决于其是否具有充足的气源供给与特定的高压低温环境。
As a special kind of unconventional gas resources with great resource potential,gas hydrate is not only an important supplement and substitute for conventional natural fossil gas,but also a new low-carbon green and efficient energy.In order to better understand the special geological formation conditions and distribution pattern of the gas hydrate,the geological and geochemical characteristics of the global gas hydrate and their sources were studied in-depth by the authors.According to the statistical results of the geochemical compositions of natural gas hydrate explored in the world so far and their geological formation conditions,the main genetic types of gas hydrate are biogenetic and biogenetic-pyrolytic mixed,followed by matured pyrolytic gases in terms of the sources of gases.The formation of gas hydrate deposits depends on the sources for gas supply in addition to a high-pressure and low-temperature environment.
出处
《海洋地质与第四纪地质》
CAS
CSCD
北大核心
2013年第2期121-128,共8页
Marine Geology & Quaternary Geology
基金
国家自然科学基金项目(41176052)
国家重点基础研究发展规划项目(2009CB219501)
关键词
天然气水合物
成矿成藏气体来源
成因类型
分布规律
主控因素
gas hydrate
origins of reservoir-forming gases
genetic types
distribution pattern
main controlling factors
