Radiant energy – Geological testing or irradiation – Well testing apparatus and methods
Reexamination Certificate
2007-06-25
2008-08-05
Porta, David P. (Department: 2884)
Radiant energy
Geological testing or irradiation
Well testing apparatus and methods
C250S269800
Reexamination Certificate
active
07408150
ABSTRACT:
A method for determining thermal capture cross-sections of formations surrounding an earth borehole, including the following steps: providing a logging device that is moveable through the borehole; transmitting, from the logging device, bursts of neutrons into the formations; detecting, at the logging device, resultant gamma ray counts, and deriving a measurement spectrum from the gamma ray counts; deriving a forward model comprising a combination of model exponential components having respective model decay times and model amplitudes; deriving an error function that depends on comparison between the forward model and the measurement spectrum; and determining, by regularized inversion, optimized exponential components of the model that substantially minimize the error function; the optimized exponential components being indicative of the thermal capture cross-sections of the formations.
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Flaum Charles
Morris, Jr. Charles Franklin
DeStefanis Esq. Jody Lynn
Gaworecki Mark R
Loccisano, Esq. Vincent
McAleenan, Esq. James
Porta David P.
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