Wells – Processes – With indicating – testing – measuring or locating
Patent
1976-07-06
1977-08-30
Novosad, Stephen J.
Wells
Processes
With indicating, testing, measuring or locating
73 88E, 166308, 33302, E21B 4700, E21B 4326
Patent
active
040448282
ABSTRACT:
This is an invention in a method for locating the azimuthal direction of fractures induced into an underground formation adjacent to a well bore. Practicing the method of the invention involves measurement of stresses created at or near ground surface by such fracture propagation, utilizing pressure sensitive devices making up stress meters which reflect those stress changes on standard pressure gauges. Such stress meters are preferably each placed at an optimum distance from a well bore and spaced therearound, and, when a fracture is induced in the formation around the well bore, preferably by hydraulic means, said stress meters measure surface stress changes as horizontal pressure changes, which pressure change measurements can then be used to mathematically determine the direction of the fracture.
REFERENCES:
patent: 3153772 (1964-10-01), Dorr
patent: 3372577 (1968-03-01), Bates et al.
patent: 3402769 (1968-09-01), Doggett et al.
patent: 3427652 (1969-02-01), Seay
patent: 3427876 (1969-02-01), Steele et al.
patent: 3586105 (1971-09-01), Johnson et al.
patent: 3739871 (1973-06-01), Bailey
patent: 3961524 (1976-06-01), Cruz
Green Sidney Joseph
Jones Arfon Harry
Swolfs Henri Samuel
Novosad Stephen J.
Russell M. Reid
Terra Tek, Inc.
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