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迁移轨迹分析是沉积学与层序地层学关注的热点和前沿研究领域。与传统的分析方法相比,迁移轨迹分析方法旨在更加直观地识别沉积体系及预测砂岩储层。基于国内外研究进展,介绍了迁移轨迹基本理论和方法,并重点介绍了盆地方向的陆架边缘迁移轨迹类型(上升型、平缓型和下降型)、定量化评价指标以及在深水砂岩储层预测方面的应用。盆底扇的形成与陆架边缘迁移轨迹密切相关,大量实例研究表明大规模的盆底扇通常形成于平缓或者下降型迁移轨迹中。随着研究的深入,深水砂体发育与陆架边缘迁移轨迹的配置关系被认为受多种因素影响,应综合考虑沉积物供给、可容纳空间、古气候等因素才能准确预测有利深水砂岩储层的发育和分布。此外,还介绍了迁移轨迹分析理论的外延:(1)走向上迁移轨迹差异演化;(2)限制性沉积盆地的迁移轨迹分析理论;(3)碳酸盐岩沉积环境中迁移轨迹的应用,拟将该分析方法引入并应用到其他类型沉积盆地中。
Migration path analysis is a hot and frontier area of interest in sedimentology and sequence stratigraphy. Compared with the traditional analysis methods, the migration trajectory analysis method aims to more intuitively identify sedimentary systems and predict sandstone reservoirs. Based on the research progress at home and abroad, the basic theories and methods of migration trajectory are introduced, and the types of migration trajectories (rising, gentle and descending) along the shelf direction are mainly introduced, and the quantitative evaluation indexes and prediction of deep-water sandstone reservoirs Applications. The formation of pelvic floor fan is closely related to the migration of shelf edge. A large number of case studies show that large-scale pelvic floor fan usually forms in gentle or falling migration path. With the deepening of researches, the relationship between the development of deep-water sand body and the migration trajectory of shelf margin is considered to be influenced by many factors. Therefore, sediment supply, accommodation space, paleoclimate and other factors should be considered comprehensively in order to accurately predict the favorable deep-water sandstone reservoir Development and distribution. In addition, the extension of the theory of migration trajectory analysis is also introduced: (1) the evolution of the upward migration trajectory difference; (2) the theory of migration trajectory of the restricted sedimentary basin; (3) the application of the migration trajectory in the carbonate sedimentary environment, It is proposed to introduce this method into other types of sedimentary basins.