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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。
System theory has become the trend of hydrate accumulation research. Hydrate exploration activity proves that the formation of hydrate in the sea area is affected not only by the conditions of temperature, pressure and water depth, but also by the gas components and gas sources , Deposition conditions, fluid migration conditions and the like. Based on the Black Sea platform as the main research area and using the method of natural gas hydrate and oil and gas system, this paper analyzes the stability conditions, gas composition and origin, favorable sedimentary characteristics and gas-bearing fluid migration in this area. The characteristics of its hydrate oil and gas system. The results show that the conditions of temperature and pressure in the Black Sea platform are very suitable for the formation of hydrates. The abundant biogenic gas is the main gas source for the hydrate formation. The intense isochronal deposition and regional anticline structure have the effect on hydrate formation Which is favorable for the occurrence of hydrate and provides favorable reservoir system such as reservoir type and accumulation space. The salt diapirs and faults provide an advantageous channel for the migration of gas-bearing fluids. Utilizing the hydrate system can help guide the exploration of the South China Sea hydrate in order to finally solve the key problems such as the enrichment of the South China Sea hydrate and the large-scale reservoir formation.