Method of determining change in subsurface structure due to...

Details Method of determining change in subsurface structure due to... Method of determining change in subsurface structure due to...

G - Physics

01

N

166/2, 73/79

G01N 33/24 (2006.01) E21B 43/26 (2006.01) E21B 47/02 (2006.01) E21B 49/00 (2006.01) G01H 9/00 (2006.01) G01V 9/00 (2006.01)

Patent

CA 1122814

ABSTRACT OF THE DISCLOSURE This invention relates to a method of determination of the change in subsurface structure of the earth resulting from the application of fluid pressure at a selected point, at a selected depth, in the earth, by measuring at least one physical paramemter of the contour of the subsurface of the earth above the point of application of fluid pressure. The method involves positioning a plurality of tiltmeters on the earth above the point of application of fluid pressure arranged in a known array, and measuring the change in angle of tilt of the earth's surface at the point of placement of each sensor while varying the pressure and flow rate of fluid into the earth at the selected point.

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