Determination of radioactive scale distribution using gamma ray

Details Determination of radioactive scale distribution using gamma ray Determination of radioactive scale distribution using gamma ray

1997-10-28

2000-03-14

Hannaher, Constantine

Radiant energy

Geological testing or irradiation

Well testing apparatus and methods

250260, G01V 506

Patent

active

06037585&

ABSTRACT:
A method for calculating the position and quantity of scale downhole, while avoiding the need to run a before log is provided. The method includes assessing the gamma ray spectra of both scale and tracers in a single logging pass. A matrix of multipliers for both borehole and formation radium is included in the data used to evaluate the gamma ray log. The radium in the formation is distinguished from radium near the borehole (scale) using the deflection of the relative distance curve and the resulting calculations of gamma ray energy attributable to scale are used to correct the measured gamma ray emissions attributed to the tracers. The method allows several tracers to be monitored with a single logging pass, even in a hole that has been previously produced and has been contaminated with radioactive scale.

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patent: 5410152 (1995-04-01), Gadeken
patent: 5578820 (1996-11-01), Gadeken et al.

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