Title Extracting SV Shear Data from P-wave Marine Data

Inventors
Bob A. Hardage

Abstract
A system and method of processing seismic data obtained using a plurality of towed single-component receivers in a marine environment is described, the towed single-component receivers configured to measure compressional P waves. The method comprises retrieving seismic data from a storage device, the seismic data comprising P-P and shear mode data wherein the P-P data and shear mode data were both received at the towed single-component receivers configured to measure compressional P waves to generate the seismic data. The method further comprises processing the seismic data to extract SV-P shear mode data and generating shear mode image data based on the extracted shear mode data.

Title
Extracting SV Shear Data from P-wave Seismic Data

Inventors
Bob A. Hardage

Abstract
A system and method of processing seismic data obtained using a surface-based receiver configured to measure vertical movement of the Earth includes retrieving seismic data from a storage device, the seismic data comprising P-P and shear mode data. The P-P data and shear mode data were both received at a surface-based receiver configured to measure vertical movement of the Earth to generate the seismic data. The system and method further include processing the seismic data to extract the shear mode data and generating a shear mode image based on the extracted shear mode data.

Title System and Method for Acquisition and Processing of Elastic Wavefield Seismic Data

Inventors
Bob A. Hardage

Abstract
A system and method of acquiring and processing full elastic waveform data from a vertical-force source comprises providing seismic waves into the earth from the vertical-force source, sensing reflections of the seismic waves at multicomponent geophones placed along the surface of the earth, and processing the reflections of the seismic waves to generate full elastic waveform data.

Title
System and Method for Acquisition and Processing of Elastic Wavefield Seismic Data

Inventors
Bob A. Hardage

Abstract
A system and method of acquiring and processing full elastic waveform data from a vertical-force source comprises providing seismic waves into the earth from the vertical-force source, sensing reflections of the seismic waves at multicomponent geophones placed along the surface of the earth, and processing the reflections of the seismic waves to generate full elastic waveform data.

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.

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.

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.

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.

Title
Apparatus and Method for Illuminating 3-D Geologic Targets
With P and S Wavelengths Generated by Explosives That Generate
Directionally Controlled Force Vectors

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.

For
more information, please contact Bob Hardage.
Telephone 512-471-0300. E-mail bob.hardage@beg.utexas.edu.