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在对孤岛地区上第三系馆陶组河流沉积体系空间展布及垂向演化研究的基础上 ,应用高分辨率层序地层学理论 ,分析并建立了该区馆陶组河流沉积高分辨率层序地层模型。认为孤岛地区馆陶组河流沉积层序总体上是一个完整向上变细的正旋回序列 ,且其演化是脉冲式的 ,其中馆 33、馆 35、馆 42 、馆 44 、馆 53、馆 63砂体厚度大 ,分布面积广 ,是本区最好的一类油层 ;基底沉降速率与沉积物沉积速率或供给速率的平衡关系是控制砂体空间展布的根本原因 ;馆陶组地层对应 2个长期基准面旋回 (三级 ) ,即馆上段和馆下段 4个中期基准面旋回 (四级 ) ,即下部 (馆 7、馆 8)、中下部 (馆5、馆 6)、中上部 (馆 3、馆 4)和上部 (馆 1+2 ) ;短期旋回基本上与油砂体规模的地层单元相当 ,可用于解释油砂体的叠加和迁移。图 3参 2 (刘建民摘 )
Based on the study of spatial distribution and vertical evolution of the sedimentary system of the Tertiary Guantao Formation in Gudao area, the high resolution sequence stratigraphy theory is applied to analyze and establish the high resolution Sequence stratigraphic model. It is considered that the sequence of the river sediments of Guantao Formation in Guodao area is a complete upward spiraling sequence and its evolution is pulsating. Among them, Hall 33, Hall 35, Hall 42, Hall 44, Hall 53, Hall 63 sand The body thickness is large and the distribution area is wide. It is the best type of oil layer in this area. The balance between substrate sedimentation rate and sediment deposition rate or supply rate is the root cause of sand body spatial distribution. The Guantao formation corresponds to 2 The long-term reference plane cycle (three levels), that is, the upper and lower part (Hall 5, Hall 6), middle and upper part 3, pavilion 4) and upper pavilion (pavilion 1 + 2). Short-term cycles are basically equivalent to those of oil sands, and can be used to explain the superimposition and migration of oil sands. Figure 3 reference 2 (Liu Jianmin pick)