摘要
济阳坳陷沾化凹陷下第三系沙四段为盆地断陷初期的产物，以干旱半干旱古气候为特征，沉积厚度变化大，埋藏深度往往大于３５００ｍ。根据岩心及沉积构造特征对该地区进行了沉积微相分析，建立了冲积扇－扇三角洲、曲流河三角洲、较深湖沉积体系为主要代表的三种沉积模式，对沙四段上部进行了环境分析，这对工区深层油气勘探有一定的指导意义。
The upper Sha-4,in the upper tertiary of Zhanhua depression,is the initialproduct of the rift depression,and characterized of dry to semiarid climate. The thickness ofthe stratum changes greatly,and the depth is more than 3500 meters.Based on the observationof cores and sedimentary structure,the micro-sedimentary faces was analyzed.Threedepositional systems were built up.They are alluvial talus-fan delta system,meanderingriver-delta system,deep lake system. The depositional environment of earlier Sha-4 periodwas studied.The result is helpful to the deep oil and gas exploration of the research area.
出处
《石油大学学报（自然科学版）》
CSCD
1995年第5期6-10,共5页
Journal of the University of Petroleum,China(Edition of Natural Science)
关键词
沉积微相
沉积体系
沉积环境
油气勘探
Micro-sedimentary faces
Depossitional system
Delta
Fan-delta
Depositioanl environment
