沉积环境对碎屑岩自组织程度的影响  

The influence of depositional environment on the self-organization extent of detrital rocks.

作　　者：隋少强[1] 宋丽红[2] 赖生华 

机构地区：[1]成都理工学院 [2]河南油田勘探开发研究院 [3]滇黔桂勘探开发研究院

出　　处：《石油勘探与开发》2001年第4期36-37,52,共3页Petroleum Exploration and Development

摘　　要：碎屑岩粒度分布等微观特征是碎屑岩相宏观结构的缩影 ,具有自相似性 ,可以用分维数来定量地描述。随着可容空间的变化 ,沉积环境的水动力作用发生改变 ,从而决定了碎屑岩粒度分布具有不同的特征。水进体系域碎屑岩的分选系数平均值比高水位体系域的大 ,分维数却相反。随着水进体系域发展到高水位体系域 ,沉积物可容空间逐渐缩小 ,湖水能量减弱 ,碎屑岩粒度分布的自组织程度逐渐变差。不同沉积微相的碎屑岩粒度分布的自组织程度不同 ,滩坝碎屑岩与辫状河分流河道碎屑岩粒度分布自组织程度相近 ,前者仅略有增高 ,盆底扇碎屑岩粒度分布的自组织程度较差。图 3表 2参With the change of accommodation, hydrodynamism of depositional environment changes, which makes the distribution of grain size of detrital rocks have different characteristics. Such micro characteristics of sandstone conglomerates as distribution of grain size, et al., are the miniature of macro characteristics of detrital rocks, which have self resemblance and can be described quantitatively by fractal dimension. The averages of coefficient of sorting in TST are higher than that in HST and the fractal dimensions of distribution of grain sizes in TST are smaller than that in HST. With the change of that from TST to HST, the accommodation reduces gradually, the energy of lake water decreases, and the self organization extent of grain size distribution becomes subtle.

关 键 词：沉积环境 碎屑岩 自组织程度 储集层 油气地质 

分 类 号：P618.130.2[天文地球—矿床学] TE12[天文地球—地质学]