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 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.
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.
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