摘要
以塔里木盆地石炭系卡拉沙依组砂泥岩段为研究对象,通过野外剖面勘测、钻井岩心观察、测井曲线解释分析,认为砂泥岩段是一个具有完整海侵至海退旋回的标准Ⅰ型层序,相当于三级海平面旋回沉积地层.砂泥岩段由低位体系域(LST)、海侵体系域(TST)与高位体系域(HST)组成.低位体系域发育冲积扇沉积体系,海侵体系域主要为扇三角洲、潮坪、泻湖、蒸发坪及局限台地组成的沉积体系,高位体系域由扇三角洲、潮坪、蒸发坪及局限台地组成的沉积体系.一个完整的海平面相对升降旋回导致盆地不同时期、不同地区沉积特征不同,各体系域沉积特征揭示了砂泥岩段沉积演化过程.
Based on a lot of outcrops investigation, cores observation and well logs analysis, Sandy mudstone member of KALASHAYI formation is divided into the standard type Ⅰ sequence with a complete transgressive-regressive cycle. It corresponds to sedimentary strata of Ⅲ-grade Sea-level cycles in Tarim basin. Sandy mudstoneof KALASHAYI formation is composed of lowstand system tract（LST）,transgrcssive system tract（TST） and highstand system tract（HST）.The lowstand system tract is made of alluvial fan deposit system.The transgressive system tract is mainly composed of fan delta, tidal flat, lagoon,evaporite flat and restricted platform .The highstand system tract is mainly composed of fan delta, tidal flat, evaporite flat and restricted plafform.A complete sea-level cycle relative movements lead to the different sediment systems and characteristics of deposition in different periods and different regions of basin.At the same time sedimentary evolution and process of Sandy mudstone is reflected.
出处
《新疆地质》
CAS
CSCD
北大核心
2009年第2期155-159,共5页
Xinjiang Geology
基金
中石化石油勘探开发研究院项目(G8804-07ZS-0012)
关键词
层序地层
沉积体系
冲积扇
扇三角洲
潮坪
砂泥岩段
Sequence stratigraphy
Deposition system
Alluvial fan
Fan delta
Tidal flat
Sandy mudstone member
Tarim Basin
