georefid:2010-087691SEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContact2011-07-06T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=10.1190/1.1886138<gco:CharacterString>Estimation of the relative importance of different well log curves in formation characterization</gco:CharacterString>1997-01-01publicationgeorefid:2010-087691doi:10.1190/1.1886138Goncalves, Carlos A.Universidade Estadual do Norte Fluminense, Laboratorio de Engenharia e Exploracao de Petroleo, Campos dos Goytacazes, BrazilauthorSociety of Exploration Geophysicists, Tulsa, OK, United StatespublisherdocumentHardcopyIn: Anonymous, Society of Exploration Geophysicists, 67th annual meeting; technical program, expanded abstracts with authors' biographies16820-823The characterization of formation heterogeneities requires a multidisciplinary study of data acquired using a large number of numerical geophysical and geological measurements, and a rigorous evaluation of the precision and accuracy of the data. In this work, an Interactive Non-Hierarchical Cluster Analysis (INCA) is used to identify heterogeneities in complex formations and to evaluate the boundaries they generate. Examples from two Ocean Drilling Program (ODP) holes were used to show the characterization obtained with this technique. In addition to the characterization, the quality control and quality assessment of the well log data used in this work is achieved through the use of a parameter (6) to rate the importance of each log curve during the characterization. It also allows the assessment of how difficult the boundaries are distinguished from each other.completedApplied geophysicsboreholescluster analysiscoresformation evaluationgeophysical methodsLeg 130Leg 144lithofaciesMIT SeamountNorth PacificNorthwest PacificOcean Drilling ProgramODP Site 807ODP Site 878Ontong Java PlateauPacific Oceanstatistical analysiswell logswell-loggingWest Pacificurn:org.iodp:exp:130urnlargerWorkCitationcampaignurn:org.iodp:exp:144urnlargerWorkCitationcampaignurn:org.iodp:exp:130:site:807urnlargerWorkCitationstudyurn:org.iodp:exp:130urnlargerWorkCitationcampaignurn:org.iodp:exp:144:site:878urnlargerWorkCitationstudyurn:org.iodp:exp:144urnlargerWorkCitationcampaignEnglishgeoscientificInformation151.5302156.37303.362227.1908