临邑洼陷南斜坡沙河街组三角洲沉积微相粒度概率累积曲线组合特征

利用粒度概率累积曲线组合特征能够准确地识别沉积微相，有效地解决其在划分沉积微相时的多解性问题。在大量粒度概率累积曲线分析的基础上，系统总结了临邑洼陷南斜坡沙河街组三角洲沉积不同微相的粒度概率累积曲线组台特征。该区三角洲平原水上分流河道微相为典型两段式和宽缓上拱式组合；三角洲前缘水下分流河道微相为低斜多跳一悬式和高斜两跳一悬武组合；三角洲前缘河流作用强于波浪作用的河口坝为两跳一悬式和低斜多跳一悬式组合，波浪作用强干河流作用的河口坝为高斜两跳一悬式和滚动、跳跃、悬浮式组合。

The combination characteristics of cumulative probability curves of grain size in sedimentary microfacies of delta of Shahejie Formation in south slope of linyi Subsag

The microfacies can be exactly distinguished by using the combination characteristics of the cumulative probability curves of the grain size, and the uncertainty that cumulative probability curves of grain size used for distinguishing microfacies can be effectively resolved. The combination characteristics of cumulative probability curves of grain size of different microfacies are summerized systematically in Shahejie delta in south slope of Linyi Subsag based on large quality of curve analysis. The distributary channel subfacies in delta plain are the combination of uphill arched pattern and typical bi-segment pattern. The distributary channels subfacies in delta front have the combination of low slope multi-bouncing single-suspension pattern and high slope bi-bouncing single-suspension pattern. The river mouth bars in the delta front, where fluvial action is stronger than wave action, are the combination of bi-bouncing single -suspension pattern and low slope multi-bouncing single-suspension pattern. The river mouth bars in the delta front, where wave action is stronger than fluvial action,are the combination of high slope bi-bouncing single-suspension pattern and rolling-bouncing-suspension pattern.