Method for monitoring fluid movement behind casing in oil and ga

Details Method for monitoring fluid movement behind casing in oil and ga Method for monitoring fluid movement behind casing in oil and ga

1977-09-02

1979-11-06

Smith, Alfred E.

Radiant energy

Geological testing or irradiation

Well testing apparatus and methods

G01V 500

Patent

active

041737180

ABSTRACT:
Well is first logged with gamma ray detection system to provide a base log. Fluid containing salt of potassium, uranium or thorium is then injected into the well opposite the interval of interest. When the well head pressure is increased, some of the injected fluid will move into the channel which is allowing fluid to move between different zones in the formations around the well. The gamma ray detection system is then again run through the well to provide a log which is compared with the base log. The channel between zones is detected by localized drastically higher readings observed on the repeat run of the gamma ray detection logging system.

REFERENCES:
patent: 3748474 (1973-07-01), Murphy
patent: 3825752 (1974-07-01), Murphy et al.
patent: 4052613 (1977-10-01), Murphy et al.

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