Wellbore fracture tracing

Radiant energy – Geological testing or irradiation – Well testing apparatus and methods

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G01V 504

Patent

active

044396775

ABSTRACT:
A method for determining the vertical extent of a fracture in a wellbore wall wherein a fluid loss control composition is employed which contains at least at one filter cake forming material which has been radioactively tagged so that upon injection of the fluid control composition into the wellbore in the vicinity of the fracture, the filter cake is built up along the fracture and thereafter, upon running a nuclear log survey in the wellbore to determine the vertical extent of the filter cake, the vertical extent of the fracture is also thereby determined.

REFERENCES:
patent: 2358945 (1944-09-01), Teichmann
patent: 2588210 (1952-03-01), Crisman et al.
patent: 3503447 (1970-03-01), Hamby, Jr.
patent: 3940612 (1976-02-01), Sparlin et al.

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