摘要
车镇凹陷是一个典型的北断南超的断陷盆地。沙河街组三段-一段地层可划分为2个二级层序和4个三级层序，层序演化体现了凹陷的深陷期、稳定沉降期、断陷萎缩期和凹陷整体抬升后再次扩张期阶段。区内主要发育有近岸水下扇、扇三角洲、三角洲、湖底扇和湖泊相等相类型，可概括为北部陡坡带、洼陷带和南部缓坡带三种沉积模式，在层序内不同体系域时期，沉积体系体现出各自的发育特点和展布规律。
CheZhen Sag is a typical fault basin that was faulted in the north and onlapped in the south. The Shahejie Formation Es3- Es1 strata of the study area were divided into two secondary sequences, four third class sequences, and divided system tract further,and the evolution of sequence embodied that Chezhen Sag underwent four evolution periods of deeply fault depression、stabilize to drop、fault depression wither and extended again after lifting litre. The sag mainly developed inshore submerged fan, fan delta, delta, sublacustrine fan and lake sedimentary facies, three kinds of depositional model can be summed up, and sedimentary system has characteristic growth feature and spatiotemporal distribution in each period of systems tract.
出处
《新疆石油天然气》
CAS
2007年第1期1-4,16,共5页
Xinjiang Oil & Gas
基金
国家"十五"重大科技攻关项目(2001BA605A09)
中石化"十五"科技攻关项目(P01013)。
关键词
车镇凹陷
层序格架
沉积相
沉积模式
CheZhen Sag
Framework
Sedimentary Facies
Depositional Model
