摘要:
通常沉积相分析以定性为主，不同的研究者对同一岩石组合所确定的沉积相存在一定差异。本文在研究了川东地区区域沉积相的基础上．确定出本区嘉一、嘉二段的主要沉积相类型。结合野外相分析，归纳出相分析过程中最重要的四种相标志，即确定四种主因素，以此来判断沉积相。逻辑评判法是以专家系统的思想为基础，基本原理是依据多个沉积相专家提供的川东地区嘉一、嘉二段沉积相研究知识及相分析过程，在诸多相标志中选定四个主因素即岩性、结构、构造、化石，模拟专家判定沉积相的思路和过程．在给出四个主因素后，计算机通过推理程序而判断出沉积相．模糊综合评判法是以模糊数学为基础，在获得沉积相专家的经验和判别知识后．建立因素集．对选取的四个主因素赋于不同的权重．建立模湖子集，然后通过评价矩阵判定四个给定因素最该符合于哪个相．程序的使用是十分方便的，通过主菜单选择不同的评判方法，回答计算机的提问，输入不同的相标志，然后由计算机推理计算得出可能的沉积相名称及环境解释，通过对几口钻井取芯剖面的研究，计算机评判结果与人工分析结果基本吻合。沉积相工作由定性向定量化发展是一个大趋势，在沉积相研究领域中计算机将发挥愈来愈大的作用。
Abstract:
Usually,sedimentary facies is denominated by determining the nature. There are different facies analysis results to the same beds by different researchers. In the study area,the main types of sedimentary facies have been denominated. Through field fades analysising, four important facies factors have been introduced in this paper. The logic judge method is on the basis of expert system' s thought. The basic principal is utilizing sedimentary facies expert' s knowlege and analysising progress on Tc1一Tc2 of East Sichuan. Four factors, including lithology,tectonic, structure and fossil are given to computer, the computer can judge the type of facies through the judging sequence. The fuzzy comprehensive judgement method is on the basis of fuzzy mathematics. The factor set theory has been built when the computer gets the facies expert's experience and judging knowlege. Then,different weight factor must be given to four main factors.In order to build fuzzy set theory,the computer will judge the facies through comparing four given factors in judging matrix. The different judging method can be used through main menu, then answer the computer's question,imput different facies sign.at last, computer can glve the most possible facies and explains. Comparing cores analyses. the result of computer explain is close to the nature. The sedimentary facies work will be developed from determining the nature to the amount. The computer will play a more and more important role in sedimentary facies analysis.
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