Apparatus and method for determining thermal neutron capture cross section of a subsurface formation from a borehole using multiple detectors

摘要

A well logging instrument including a plurality of detectors having different precisions and accuracies, the more precise detectors generally having lower accuracies. The detectors are responsive the interaction of an radiation from a suitable source on the instrument with earth formations. Outputs from the plurality of detectors are smoothed and combined to provide processed measurements with improved accuracy and precision.