caa a22 4500 60622565X CHVBK 20210128101149.0 cr unu---uuuuu 210128e20150101xx s 000 0 eng 10.1007/s10553-015-0559-z doi (NATIONALLICENCE)springer-10.1007/s10553-015-0559-z Practical Application of a Combination of Principal Component Analysis and Cluster Analysis to Evaluate the Parameters of Layered Heterogeneous Formations in Dagang Oil Field [Elektronische Daten] [Yi Zhang, Ying-hu Zhai, Teng-fei Sun, Zhao-hui Cao] We take five parameters describing the properties of rocks (drillability, abrasive resistance, hardness, plasticity, and compressive strength) as the initial factors used for principal component analysis. Using this method, we obtained two principal components and composite scores, which we then treated using cluster analysis. These operations allow us to make a comprehensive evaluation of all 20 strata in the Dagang oil field (China). The results show that the 20 strata can be divided into four groups, which can provide a basis for drill bit selection and drilling design in the Dagang oil field. Springer Science+Business Media New York, 2015 drillability nationallicence abrasive resistance nationallicence hardness nationallicence plasticity coefficient nationallicence compressive strength nationallicence principal component analysis nationallicence Zhang Yi China University of Petroleum, 102249, Beijing, China aut Zhai Ying-hu China University of Petroleum, 102249, Beijing, China aut Sun Teng-fei CNOOC Research Institute, 100027, Beijing, China aut Cao Zhao-hui China University of Petroleum, 102249, Beijing, China aut Chemistry and Technology of Fuels and Oils Springer US; http://www.springer-ny.com 50/6(2015-01-01), 525-532 0009-3092 50:6<525 2015 50 10553 https://doi.org/10.1007/s10553-015-0559-z text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10553-015-0559-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhang Yi China University of Petroleum, 102249, Beijing, China aut NATIONALLICENCE 700 1- Zhai Ying-hu China University of Petroleum, 102249, Beijing, China aut NATIONALLICENCE 700 1- Sun Teng-fei CNOOC Research Institute, 100027, Beijing, China aut NATIONALLICENCE 700 1- Cao Zhao-hui China University of Petroleum, 102249, Beijing, China aut NATIONALLICENCE 773 0- Chemistry and Technology of Fuels and Oils Springer US; http://www.springer-ny.com 50/6(2015-01-01), 525-532 0009-3092 50:6<525 2015 50 10553