Reservoir Evaluation and Development ›› 2018, Vol. 8 ›› Issue (1): 12-15.

• Reservoir Geology • Previous Articles     Next Articles

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

Wu Yuping1,Sun Wei1,Wei Chi2,Lyu Ke3   

  1. 1. State Key Laboratory of Continental Dynamic, Department of Geology, Northwest University, Xi’an, Shaanxi 710069, China;
    2. Scool of Earth Science and Engineering, Xi’an Shiyou University, Xi’an, Shaanxi 710065, China;
    3. No.8 Oil Production Plant of Changqi Oilfield Branch, Xi’an, Shaanxi 710018, China;
  • Received:2017-05-09 Online:2018-02-26 Published:2018-12-05


In order to comprehensively evaluate the Chang-61 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.

Key words: cluster analysis, gray correlation, reservoir evaluation, Jiyuan area

CLC Number: 

  • TE122