【摘要】 以层序地层学原理为基础,采用地震线描法,建立了焉耆盆地博湖坳陷八道湾组的层序地层格架。将其自下而上划分为SQ1,SQ2和SQ3等3个三级层序,并分析了各个层序的地层格架特征,同时建立了层序地层模式,指出了在该模式下的油气勘探方向。研究结果表明,八道湾组在层序结构上低位体系域普遍不太发育,水进体系域和高位体系域发育;沉积体系以辫状河三角洲、扇三角洲及湖泊沉积体系为主,沉积分布主要受盆地形态的控制。更多还原

【Abstract】 The principle of sequence stratigraphy and line drawing method of seismic-reflection profile are applied to establish the sequence stratigraphic framework of Jurassic Badaowan Formation in Bohu Depression of Yanqi Basin.The Badaowan Formation is divided into three third-order sequences,including SQ1,SQ2 and SQ3 from base to top,of which the stratigraphic framework characteristics are analyzed respectively.The sequence stratigraphic model is established and the direction of oil and gas exploration is indicated.The research result shows that the LST is generally not developed widely in those three sequences within the Badaowan Formation,while the TST and HST are well developed;the depositional systems are mainly braided river delta,fan delta and lacustrine deposit and their distributions are mainly controlled by the morphology of the basin.更多还原