沉积相平面图编图规范研究  

Specifications to draw sedimentary-facies plans

作　　者：杨慧 YANG Hui(State Energy Key Laboratory for Carbonate Oil and Gas,Chengdu,Sichuan 610041,China;Sinopec Exploration Company,Cheng-du,Sichuan 610041,China)

机构地区：[1]国家能源碳酸盐岩油气重点实验室,四川成都610041 [2]中国石化勘探分公司,四川成都610041

出　　处：《天然气技术与经济》2024年第3期26-31,55,共7页Natural Gas Technology and Economy

基　　金：中国石油化工股份有限公司科研项目“四川盆地及周缘资源评价”(编号:P23221)。

摘　　要：为了解决沉积相平面图编图过程存在的混相跳相现象、岩性图式过于简单、相的级次划分混乱以及相的颜色充注不规范等问题,以沉积相平面图编图规范为研究对象,分析了SY/T5615-2004《石油天然气地质编图规范及图式》(以下简称《编图规范及图式》)存在的主要问题,指出了通过实践如何应用相对复杂的海相碳酸盐岩相模式、通过对岩石的系统分类建立岩性图案库、通过统计从深海盆地到古陆不同相带的颜色充注特征形成赋色原则。研究结果表明:①新修正的威尔逊(Wilson)相模式、碳酸盐岩台地相模式和碳酸盐岩缓坡相模式共3种概念性相模式是相对复杂的海相沉积相划分最重要的参考基础;②参考《编图规范及图式》岩石图式及岩石形成作用的分类方案,通过五步法建立的岩性图案可超过2200个,基本能满足目前高精度沉积相平面图编图需求,达到“岩性”即“岩相”的目的;③通过精准的岩性充填表征其薄片微相,这样便同时兼顾了微相的级次划分及代表薄片微观尺度的本意;④从深海盆地到古陆不同相带的赋色原则为往深海方向为蓝色调、向陆方向为褐色调、海陆交互相为橙色调。结论认为:①正确的相模式应用能提高沉积相平面图编图的科学性;②建立满足生产和科研需求的岩性图案库能够提高沉积相平面图编图的时效性;③精准的岩性充填有利于解决相的级次划分,尤其是微相的定义尚不统一的问题;④赋色原则能够提高沉积相平面图编图的通用性和美观性。There exist many problems in drawing sedimentary-facies plans,including confused facies or facies deficiency,too simple lithological icon style,facies division in chaos,and informal color filling.So,taking drawing specifications as ob-jectives,we analyzed the main issues in SY/T5615-2004 Drawing Specification and Pattern for Oil and Gas Geology Explo-ration(hereinafter referred to as Drawing Specification and Pattern),and pointed out how to make use of the relatively com-plex marine carbonate facies model,establish lithology pattern library through systematic rock classification,and form color-ing principles by gathering colors filling in different facies zones from deep-sea basins to ancient continents.Results show that(i)three conceptual facies patterns,including the newly revised Wilson facies pattern,the carbonate platform facies pattern and the carbonate gentle-slope facies pattern,are regarded as the most important reference basis to divide relative-ly complex marine sedimentary facies;(ii)referring to the classification scheme of both rock icon style and rock formation in Drawing Specification and Pattern,we have established over 2,200 lithology patterns through the five-step way,which may roughly meet the current demand for drawing sedimentary-facies plans with high precision and achieve the aim of"li-thology namely lithofacies";(iii)characterization on thin-section microfacies is conducted after accurate lithologic filling,which considers not only microfacies classification but micro scale in this thin section;and(iv)coloring principles are as follows:blue towards the deep-sea,brown towards the continent,and the marine-terrigenous facies in orange,respectively.In conclusion,to properly take advantage of facies patterns may improve scientific natures in drawing sedimentary-facies plans.Setting up the lithology pattern library which meets the needs of production and scientific research is conducive to this drawing timely.Accurate lithologic filling is helpful to perform facies classification,especially for

关 键 词：沉积相平面图 岩性图案 相级次划分 相带颜色 

分 类 号：P618.13[天文地球—矿床学]