Method of determining material properties in the earth by measur

Details Method of determining material properties in the earth by measur Method of determining material properties in the earth by measur

1993-11-10

1995-05-23

Noland, Thomas P.

Measuring and testing

With fluid pressure

Dimension, shape, or size

73807, 73155, 304330, 166250, 175 58, G01N 1902

Patent

active

054171032

ABSTRACT:
This invention relates to a method of determination of the deformation of the surface or subsurface of the earth resulting from an applied pressure change at a selected point, at a selected depth, in the earth, by measuring at least one physical parameter of the deformation above the point of application of pressure change. The method involves positioning a plurality of tiltmeters on or below the surface of the earth above the point of application of pressure change arranged in a known array, and measuring the change of angle of tilt of earth's surface or subsurface at the point of placement of each sensor while varying the pressure and flow rate of fluid into or out of the earth at the selected point. This invention further teaches how the individual values of incremental tilt at selected points on or below the earth's surface can be processed to determine material properties at selected points in the earth.

REFERENCES:
patent: 3741653 (1973-06-01), Svetlinchny
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patent: 4698759 (1987-10-01), Eliason et al.
patent: 4799550 (1989-01-01), Harris et al.
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patent: 4869322 (1989-09-01), Vogt, Jr. et al.
patent: 4887670 (1989-12-01), Lord et al.
patent: 5310003 (1994-05-01), Jennings

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