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Patent
No.: US 6,625,542
Date of Patent: September 23, 2003
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Title
Determining Anisotropy in a Stratum using Scattered Vertical
and Horizontal Shear Modes |
Inventors
Bob A. Hardage and Robert J. Graebner |
Abstract
The present invention provides a system for, and method of determining
anisotrophy in a stratum using scattered horizontal shear and
vertical shear modes. The method includes transforming seismic
energy wave generated by a seismic energy source and received
by seismic receivers into radial/transverse coordinate space,
determining a seismic energy wave corridor along a radial path
between the seismic energy source and the seismic receivers,
and gathering seismic data received by the seismic receivers
within the corridor wherein the data includes horizontal and
vertical shear components. |
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Patent
No.: US 6,564,150
Date of Patent: May 13, 2003
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Title
System and Method for Orienting Seismic Energy Receivers
to Yield Discriminated Vertical Shear Waves |
Inventors
Allen L. Gilmer, Bob A. Hardage, and James L. Simmons |
Abstract
A system for, and method of, orienting seismic energy sources
and seismic energy receivers to substantially separate a compressional
wave from a vertical shear wave. The method includes reflecting
a seismic energy from a subsurface interface to produce a reflected
seismic energy wave that has a compressional energy and vertical
shear energy associated therewith. A first seismic energy receiver
is oriented such that it is aligned with an angle of emergence
of the reflected seismic energy wave to thereby maximize the
vertical shear energy received by a second seismic energy receiver.
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Patent
No.: US 6,556,921 B1
Date of Patent: April 29, 2003
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Title
Determining Vertical Fractures in a Stratum Using Scattered
Vertical and Horizontal Shear Modes |
Inventors
Bob A. Hardage and Robert J. Graebner |
Abstract
The present invention provides a system for, and method of,
determining vertical fractures in a stratum using scattered
horizontal shear and vertical shear modes. The method may include
segregating first order horizontal and vertical shear modes
of a seismic energy wave into second order horizontal and vertical
shear modes, defining a seismic energy wave corridor along a
radial path between a seismic energy source and seismic receivers,
and gathering seismic data received by the seismic receivers
within the corridor, the data including the second order horizontal
and vertical shear modes. |
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Patent
No.: US 6,498,990 B2
Date of Patent: December 24, 2002
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Title
System and Method for Orienting Seismic Energy Sources and
Receivers to Yield Discriminated Horizontal and Vertical Shear
Waves |
Inventors
Bob A. Hardage, James L. Simmons, and Allen L. Gilmer |
Abstract
A system for, and method of, orienting seismic energy sources
and seismic energy receivers to yield discriminated horizontal
and vertical shear modes. In one embodiment, the system includes:
(1) an initial matrix representing wave energy produced by a
selected seismic energy source and received by a selected seismic
energy receiver, (2) a first transforming matrix that cooperates
with the initial matrix to orient the selected seismic energy
source with respect to the selected seismic energy receiver,
and (3) a second transforming matrix that cooperates with the
initial matrix to orient the selected seismic energy receiver
with respect to the selected seismic energy source, the initial
matrix thereby transformed into a successive matrix containing
the discriminated horizontal and vertical shear modes.
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Patent
No.: 5,907,132
Date of Patent: May 25, 1999
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Title
Apparatus and Method for Illuminating 3-D Geologic Targets
With P and S Wavelengths Generated by Explosives That Generate
Directionally Controlled Force Vectors
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Inventor
Bob A. Hardage |
Abstract
Methods and apparatus for creating as shear ("S")
wave for use in oil and gas exploration, where such S-wave is
created by detonating an explosive packaging in a shot hole
in a manner that produces directionally controlled S-wave force
vectors at each source station across a 3-D survey grid. |
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