Logfacies modeling based on neutron pulsed logs and multivariate analysis
Huaila Fonseca Ayres, Luiz Landau, José Agnelo Soares · 2009
This work concerns logfacies modeling for an onshore oil field of Recôncavo Basin, Bahia state, Brazil. Data from geophysical logs and core description of only one well was used to model 33 wells that did not have core information, but have a suite of logging curves which includes neutron pulsed logs. Logfacies modeling was performed according to discriminant statistical rules, resulting in synthetics facies for all (34) wells. In order to check the efficiency of logfacies prediction on the 33 wells for which core description was nor available, the logfacies columns were compared with a hydrocarbon saturation curve derived from pulsed neutron data. A very good match was found for all wells, suggesting the used procedure as suitable for logfacies modeling, at least for this oil field.