段分类 meaning in English

segment classification

Qualitative study is about qualitative and boundary analysis . the basic analysis thought and method is to study the distribution and characteristics of source rock and caprock by analyzing the classification and characteristics of the condensed sections , and to research the distribution and characteristics of reservoir by analyzing the characteristics and distribution of the sedimentary systems and system tracts
定性研究是解决“定性”和“定界”问题，基本思路和方法是从密集段分类和特征入手，研究烃源岩和盖层的分布与特征；从沉积体系、体系域特征和展布规律出发，分析储集体的分布与特征。