Method of fracturation detection

Details Method of fracturation detection Method of fracturation detection

G - Physics

01

N

23/117, 23/45, 7

G01N 3/10 (2006.01) E21B 49/00 (2006.01) E21C 39/00 (2006.01) G01N 3/12 (2006.01) G01N 33/24 (2006.01) E21B 47/10 (2006.01)

Patent

CA 1131463

ABSTRACT A method and apparatus for detecting cracks or other separations deep inside massive rock-like structures and assessing the integrity and safety of mine roofs and the like, wherein two or more boreholes are drilled into the rock and fluid pressure is applied to one of the holes. The time for equalization of pressure between the two holes as measured by simple vacuum or pressure gauges is a function of the permeability of the rock and any fractures in the rock. If fractures are present the equalization time is an order of magnitude faster than if no fractures are present.

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