诸城凹陷西部莱阳群粒度分析及沉积环境研究

Grading analysis and research of sedimentary environment of Laiyang group in the west of Zhucheng depression

莱阳群以湖相细碎屑岩系沉积为主,故石油、地矿部门曾多次在诸城凹陷乃至整个胶莱坳陷开展工作。根据对山东胶东地区诸城凹陷西部莱阳群砂岩粒度特征统计,对莱阳群砂岩的分选性、偏度、峰度等进行分析,并利用C-M图解及粒度概率累积曲线识别出河湖沉积环境。归纳出了多种粒度概率累积曲线形态样式,最后确定出河流沉积、河湖三角洲沉积、湖泊沉积等沉积环境。

Laiyang group mainly lacustrine fine clastic rock series deposits, so the oil, mining sector has repeatedly in zhucheng sag and the whole work jiaolei basin. According to the laiyang group in western shandong zhucheng sag of jiaodong area sandstone grain size characteristics of the statistics, the laiyang group of the sorting characteristics of sandstone, skewness, kurtosis, etc are analyzed, and by using the C- M graphic and grain size probability cumulative curves to identify the sedimentary environment of lakes. Summarized various granularity probability cumulative curves form style, finally determine the river sedimentary, lacustrine delta and lake sedimentary environment.