摘要
系统论成为水合物成藏研究的趋势,水合物的勘探活动证明,海域水合物的形成不仅受到温度、压力、水深等条件的影响,其产出状态和分布规律还受到气体组分、气体来源、沉积条件、流体运移条件等的控制。以布莱克海台作为主要研究区域,运用天然气水合物油气系统的方法,通过对这一区域水合物稳定条件、气体组分和来源、有利沉积体特征和含气流体运移等方面进行分析,总结了其水合物油气系统的特征。研究结果表明,布莱克海台区域温度和压力等条件非常适合水合物的形成,丰富的生物成因气体是水合物形成的主要气体来源,强烈的等深流沉积和区域背斜构造对水合物的形成相当有利,为水合物的赋存提供了潜在的储集类型和聚集空间等有利的沉积体系,盐底辟、断层等为含气流体的运移提供了有利的通道。利用水合物油气系统,有利于指导我国南海水合物勘探研究工作,以便最终解决南海水合物在哪里富集,以及规模成藏等关键问题。
The system theory is leading the trend of hydrate reservoir studies.Hydrate exploration has proved that the formation of hydrate in seas is affected by temperature,pressure,water depth and other conditions and that the yield status and distribution of hydrate are dictated by gaseous components, sources of gas ,depo- sitional conditions and fluid migration conditions.Targeting the Blake Ridge as the main area of study,re- searchers examines the characteristics of hydrate oil and gas systems by analyzing the hydrate stabilization conditions,gas components and sources,the characteristics of favorable sedimentary bodies and the migration of gas-bearing fluids in the area,using the natural gas hydrate oil and gas system method.Research results show that the temperature and pressure conditions of the Blake Ridge are very suitable for the formation of hy- drate ,the abundant gas resources of biological origin are the main sources of gas contributing to the forma- tion of hydrate ,the strong contourite deposits and regional anticlines are very favorable to the formation of hydrate ,offering a favorable sedimentary system for the formation and storage of hydrate in terms of reservoir type and accumulation space,and that salt diapiric structures and faults provide a favorable passage for the migration of gas-bearing fluids.The use of the hydrate oil and gas system will assist in China＇s hydrate ex- ploration and research in the South China Sea and help researchers find answers to some key questions such as where hydrate accumulates in the South China Sea and where large reservoirs are located.
出处
《中外能源》
CAS
2015年第4期28-34,共7页
Sino-Global Energy
基金
中国石油天然气股份有限公司科研课题(项目编号:2014A-4806)
