摘要
地震、测井、岩心以及微量元素资料的分析表明，塔中４井区石炭系东河砂岩段中下部发育有河口湾沉积体系，其主体由潮下潮汐沙坝、滨面、潮坪及河流沉积组成。河口河沉积体的垂向序列由一组向上变细的旋回层构成，这种旋回层是由潮下潮汐通道的迁移或摆动造成的，区域上不能进行横向对比。但是，河口湾沉积序列整体向上变细及退积的特征仍反映了河口湾形成于海浸过程中，是河流入海处河口沉溺的结果。
An analysis of seismic,logging, cores and elements data demonstrates that an estuary sedimentary system in the middle-lower parts of Carboniferous Donghe Sand member in Tazhong 4 well area,Tarim Basin is made up mainly of tidal bar,shoreface, tidal flat and fluvial deposits.Up-finer cyclothems resulting from the shift of tidal channels constitute the main part of a vertical sequence of estuary deposits. The cyclothems are not used to correlate laterally in region. Nevertheless, overall characteristics of up-finer and retrogradation show that the estuary deposits are accumulated in the process of transgression.
出处
《江汉石油学院学报》
CSCD
北大核心
1995年第4期5-11,共7页
Journal of Jianghan Petroleum Institute
基金
塔里木石油勘探开发指挥部资助
关键词
沉积
沉积特征
塔里木盆地
沉积作用
水力作用
estuary
deposition(geology)
depositional cycle
depositional feature
Carboniferous period
Tarim Basin
