白云岩的分类命名:研究现状与方案初探OA

The existing classification system for carbonate rocks is primarily based on limestone,and is directly applied to dolostones with diverse textures and complex origins.As a result,this approach faces problems such as weak genetic indication,insufficient characterization of diagenetic textural alterations,lack of key mineralogical information,and inadequate applicability,all of which hinder the study of dolostone sedimentology and the fine evaluation of oil and gas reservoirs.To this end,this paper systematically reviews the current status and representative schemes of dolostone classification and nomenclature both domestically and internationally,and compares ancient and modern dolostones in terms of texture,structure and genesis.In addition,the controversies and existing shortcomings in the nomenclature of Precambrian dolostones are summarized,and a suitable classification path is explored based on rock macro-and micro-characteristics,together with artificial intelligence technology.The following results are obtained.First,the existing schemes are lack of a unified standard,exhibiting significant differences in nomenclature principles,and are mostly based on a single classification basis,without systematically taking into account the textural and compositional complexity and microbial factors.Second,a secondary texture and genesis based dolostone classification framework following the principles of"combining macro-and micro-characteristics,integrating multiple factors,and correlating with genesis"is preliminarily constructed by integrating macro-and micro-scale characteristics.It encompasses three basic lithological and genetic modification systems:crystalline,granular,and microbial.Third,it is proposed to introduce image recognition and machine learning technology to enable the quantitative extraction of rock features and thus enhance the objectivity and standardization level of classification and nomenclature.In conclusion,the research findings clarify the limitations of traditional classification schemes,and establish a preliminary classification system that is adaptive to the genetic and textural characteristics of dolostones,thereby providing theoretical support for unifying dolostone nomenclature standards,advancing the study of dolostone genesis,and facilitating its application in oil and gas exploration.