Reservoir comprehensive evaluation based on cluster analysis and gray correlative analytical method: A case study in Chang-6<sub>1</sub> formation of Jiyuan area in Ordos Basin

Wu Yuping; Sun Wei; Wei Chi; Lyu Ke

doi:10.13809/j.cnki.cn32-1825/te.2018.01.003

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Reservoir comprehensive evaluation based on cluster analysis and gray correlative analytical method: A case study in Chang-6₁ formation of Jiyuan area in Ordos Basin
Issue 1, Pages: 12-15+23(2018)
Published：2018
DOI： 10.13809/j.cnki.cn32-1825/te.2018.01.003
稿件说明：

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[1]吴育平,孙卫,魏驰,吕可.基于聚类分析和灰色关联分析法的储层综合评价——以鄂尔多斯盆地姬塬地区长6_1储层为例[J].油气藏评价与开发,2018,8(01):12-15+23. DOI： 10.13809/j.cnki.cn32-1825/te.2018.01.003.

Wu Yuping, Sun Wei, Wei Chi, et al. Reservoir comprehensive evaluation based on cluster analysis and gray correlative analytical method: A case study in Chang-6₁ formation of Jiyuan area in Ordos Basin[J]. Petroleum Reservoir Evaluation and Development, 2018, (1): 12-15+23. DOI： 10.13809/j.cnki.cn32-1825/te.2018.01.003.

摘要

结合聚类分析和灰色关联分析法对姬塬地区长61储层进行综合评价。通过谱系聚类从众多参数中选择出相对独立的评价参数

利用灰色关联分析法求取各评价参数的权系数

进而获得该区储层评价的综合评价指标REI。根据REI值的大小

将研究区储层分为四类。结合沉积相图

发现优质储层都处于主河道中央部位

表明该区储层特征与沉积环境有密切联系。同时表明

聚类分析和灰色关联分析法的有效结合可以提供一种新的方法进行储层评价

其结果具有较高的可信度。

Abstract

In order to comprehensively evaluate the Chang-6

formation in Jiyuan area

we combined the cluster analysis with the gray correlative analytical method

selected the relative independent evaluation parameters from a number of parameters by hierarchic cluster analysis

and get the weight coefficient of every evaluation parameter by the gray correlative analytical method

and then obtained the comprehensive evaluation index REI. According to the value of REI

the reservoir is divided into four categories.And combined with the sedimentary facies

it is found that the high quality reservoir is in the central part of the main channel

indicating that

the reservoir characteristics are closely related to the sedimentary environment. It is also shown that the combination of the cluster analysis and the gray correlative analytical method provides a new way for the reservoir evaluation

and the result has higher credibility.