Patent ID: 8234072
Filing Date: 2012-07-31
Classification: G01V

Abstract:
1. For use in conjunction with a subterranean formation traversed by a borehole, a well logging method comprising the steps of: performing across an interval of the well at least one logging operation in each of which a logging tool, having a neutron emitting source and a plurality of thermal neutron or capture gamma ray logging detectors located at different distances from the neutron emitting source, is moved through the borehole and used to generate a detector count rate and a detector count rate ratio of the count rates in two of the detectors; and utilizing the detector count rate and the detector count rate ratio obtained during the logging operation together to determine the presence of high thermal neutron capture cross section material-containing proppant in the formation and/or the borehole region; wherein said utilizing step comprises the computation of a computed detector count rate from the detector count rate ratio based on a relationship/trendline determined between the detector count rate and the detector count rate ratio in an interval of the well containing no proppant, and wherein said relationship/trendline is developed in an interval of the well where predetermined borehole and/or predetermined formation conditions are similar to those in the intervals where the determination is being made of the presence of proppant in the formation and/or the borehole region.