Bracewell LLP
Identifying weighting material sag with pulsed neutron logs
A method of identifying barite in a subterranean annulus that surrounds a wellbore, where the method includes detecting gamma rays in the wellbore that are generated from the annulus, obtaining a count rate of the detected gamma rays, comparing the count rate with reference data, and determining the presence of barite in the wellbore based on the comparison. The count rate can be a ratio of counts of detected gamma rays obtained from spaced apart receivers on a downhole tool, or a ratio of detected inelastic and capture gamma rays. The reference data is obtained by using a simulation algorithm.
Baker Hughes Incorporated
G E G E E
G01V E21B G01V E21B E21B
inventional inventional inventional inventional inventional
Sandeep Otto N. Yonghwee Feyzi David Qiong
Gade Fanini Kim Inanc Chace Zhang