从莺歌海盆地东方气田中深层中新统黄流组深水沉积实例出发,利用多方资料揭示了一个从强制海退早期到海侵晚期的完整自旋回,以及每个时期深水沉积旋回的特征与发育规律.结合物源及地貌环境特征,将研究区分为三块,阐述了每块的特点.黄流组一段深水沉积属于多点供源、较富砂的沉积环境,且坡陡不大,海盆较小,为受沉积自旋回及地貌环境控制的较典型的深水沉积模式.研究区内的有利储层主要为强制海退晚期到低水位域正常海退和海侵早期的堤成水道及前缘决口扇复合沉积,而之后海侵早期的下切水道对于原有较连续的浊流砂体起到了分割作用,造成了现今的砂体展布格局.

The deep-water sedimentation of Upper Miocene Huangliu Formation reveals one whole single sedimentary cycle from early forced regression to late transgression in Dongfang Gas Field, Yingehai Basin. The sedimentary characteristics and development rule are discussed on each cycle. The study area is divided into three blocks according to the sediment source and geomorphology. The Huangliu Member-1 deep-water sediments are characterized by multiple-source supply, sand-rich environment, gentle gradient slope and small-scale plain basin, which is a typical deep-water sedimentation model controlled by the sedimentary cycle and geomorphology, especially stratigraphic cyclicity. The prospective reservoirs should be the leveed channels and the frontal flood fan that formed during late forced regression to low-stand normal regression and early transgression. The later following cutting-downward channels that formed during early transgression play a role of segmenting the primary continuous turbidity-flow sand body off, which just is the present distribution pattern of sandy reservoir.