Method of measuring fracture pressure in underground formations

Details Method of measuring fracture pressure in underground formations Method of measuring fracture pressure in underground formations

1982-09-07

1984-06-12

Suchfield, George A.

Wells

Processes

With indicating, testing, measuring or locating

73155, 166308, E21B 4706

Patent

active

044535953

ABSTRACT:
A method is disclosed for accurately measuring breakdown or fracture pressure by placing a variable volume device in immediate communication with a test interval formed in a borehole extending through an underground formation. Expansion of the variable volume device increases pressure in the test interval to the fracture pressure of the formation. The fracture pressure may be accurately measured by monitoring pressure in the test interval, expansion of the variable volume device then preferably being terminated in order to minimize the extent of fracture within the formation.

REFERENCES:
patent: 2851109 (1958-09-01), Spearow
patent: 3427652 (1969-02-01), Seay
patent: 4372380 (1983-02-01), Smith et al.
patent: 4392376 (1983-07-01), Lagus et al.
patent: 4398416 (1983-08-01), Nolte

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