论文部分内容阅读
砂岩储集层的物性是影响水驱油效率及油田开发效果的直接因素。为了研究储层物性与其沉积和成岩作用的关系,试用了综合评判的方法。该方法可以将描述性的地质因素,诸如分选、圆度、胶结类型等,用样品在不同渗透率区间的概率转换成隶属度,再通过模糊交换,得到综合评判的结果,即渗透率区间值。以214块样品计算的结果来看,用此方法可以对非数值型变量进行分类判别。由于在判别过程中综合考虑多种因素,对各个因素又赋于不同的权重,因而可以得到较好的分类效果。文中叙述了模糊集理论中有关的基本概念及综合评判法的计算步骤。
The physical properties of sandstone reservoirs are the direct factors that affect the efficiency of water flooding and the effect of oilfield development. In order to study the relationship between reservoir physical properties and its sedimentation and diagenesis, a comprehensive evaluation method was used. The method can convert the descriptive geological factors, such as sorting, roundness, cementation types, etc., into probability of membership in different permeability intervals, and then obtain the result of comprehensive evaluation through fuzzy exchange, that is, the permeability interval value. Based on the results of 214 samples, this method can be used to classify non-numerical variables. Due to various factors in the process of discrimination, different factors are assigned to different weights so that better classification results can be obtained. The article describes the basic concepts of fuzzy set theory and the comprehensive evaluation of the calculation steps.