【摘要】 金湖凹陷古近系戴南组发育重力流水道沉积。通过地震、测井、岩心和实验资料的分析,论述了重力流水道的成因、沉积特征和分布规律。重力流水道与间歇性洪水作用及其对先期未固结的三角洲沉积的冲刷、再搬运及沉积作用相关,分布于盆内顺源同沉积断层形成的断槽内,可分为主水道和侧缘两个亚相。建立了重力流水道的垂向沉积序列模式。研究表明,重力流水道是一种有利的油气储集相带。研究结果扩大了苏北盆地油气勘探领域。更多还原

【Abstract】 Gravity flow channel developed in Dainan Formation,Paleogene in Gaoyou Sag,Subei Basin.Based on the integrated analysis on the data of seismic,logging,core and laboratory rock tests,the sedimentary characteristics and distribution rules of gravity flow channel were discussed.The formation of gravity flow channel is due to the intermittent floodwater and its scouring,re-transportation,and re-deposition of sediments of delta.The gravity flow channel is developed along the fault-trough formed by syn-depositional fault in the sag,and can be divided into two subfacies: channel and lateral margin.Vertical sedimentary sequence model is established based on integrated studies.This study provides a new oil & Gas exploring realm in Subei Basin.更多还原