河流相砂体的沉积微相特征--以济阳坳陷埕东北坡馆陶组砂体为例

本文以济阳坳陷埕东油田北坡馆陶组河流相砂岩为例，详细阐述了河流相砂体的沉积微相研究方法，将研究区的河流相砂体划分为曲流河、网状河和辫状河三种沉积相，并进一步划分为七类主要的沉积微相。通过单井剖面和井间剖面对比分析，研究沉积微相在垂向上和平面上的变化规律，在此基础上结合地震资料的精细解释，编制了研究区内不同砂层组沉积时期沉积微相平面展布图。

Sedimentary microfacies of the fluvial sandstones:an example from the sandstones in the Guantao Formation on the northern slope of the Chengdong oilfield in the Jiyang depression, eastern China

Exemplied by the sandstones in the Guantao Formation on the northern slope of the Chengdong oilfield in the Jiyang depression, eastern China, the sedimentary microfacies of the fluvial sandstones are described in detail in the present paper. These sandstones in the fluvial facies may be group into three sedimentary facies including the meandering, anastomosed and braided stream facies, and seven sedimentary microfacies. The approaches of the vertical and horizontal changes of the sedimentary microfacies are mostly based on the data on the individual well sections and inter well sections in combination with relevant seismic data, resulting in the construction of the plans showing the distribution of the sedimentary microfacies during the deposition of different sandstone groups in the study area.