摘要
在岩心观察的基础上,对塔里木盆地西南坳陷上第三系碎屑岩的粒度数据进行分析,并绘制出大量的粒度概率累积曲线和C-M图,最后系统总结出辫状河、曲流河和三角洲这三个相粒度分布特征的基本规律:从辫状河、曲流河到三角洲相,概率累积曲线上的悬浮总体逐渐减小,跳跃总体逐渐增多;C-M图上的Q-R段逐渐缩短,R-S段逐渐增长,Q点附近对应的C值也逐渐变小。
On the basis of observation of cores,the size fraction data of the Neogene clastic rock in southwest sag of the Tarim Basin was analyzed,and a large number of grain size probability cumulative curves and C-M diagrams were plotted.At last,the basic law of grain size' distribution characteristics for the three facies were summarized,including braided river、meandering river and delta facies.In the grain size probability cumulative curves,the suspension population of these facies is gradually larger,while the bouncing population is smaller one by one.In the C-M diagrams,the Q-R segments are progressively shorter,while the R-S segments are progressively longer and the corresponding C values near the Q points become smaller and smaller.
出处
《内蒙古石油化工》
CAS
2010年第15期142-144,共3页
Inner Mongolia Petrochemical Industry
关键词
塔里木盆地
粒度分布特征
概率累积曲线
C-M图
Tarim Basin
Grain Size' Distribution Characteristics
Grain Size Probability Cumulative Curves
C-M Diagrams