DR. YOUNG IL KIM, MD
Osteopathic Medicine at Richmond Ave, Houston, TX

5781503, Jul 14, 1998

Jan 29, 1997

8/790947

Young C. Kim - Houston TX

Exxon Production Research Company - Houston TX

G01V 128, G01V 136

367 45

A method for attenuating source-generated surface wavetrains in a set of seismic data traces. According to the method, the seismic data traces are Fourier transformed with respect to time to determine the frequency components of the surface wavetrain. A phase matching operation is then performed using estimates of the wavenumbers for each of the frequency components to approximately align the surface wavetrain in the seismic data traces. Next, a spatial low-pass filter is used to remove the approximately aligned surface wavetrain. Finally, the phase matching is removed and an inverse Fourier transformation is performed to return the seismic data traces to the time domain.

6278950, Aug 21, 2001

Mar 2, 2000

9/517365

Young C. Kim - Houston TX
Arturo E. Romero - Sugar Land TX
Michael M. Deal - Houston TX

ExxonMobil Upstream Research Co. - Houston TX

G01V 128

702 17

A method for compensating for amplitude loss in a set of seismic traces, where the amplitude loss is caused by shallow attenuation anomalies. Attenuation factors are calculated from first-arrival amplitudes for long-offset seismic data traces. Those factors are calculated by numerical methods, using matrix inversion and iteration. Those factors are used to adjust upward the amplitudes of all later-arriving seismic traces. Frequency dependent attenuation is treated by dividing the seismic traces into frequency ranges using band-pass filters, then using the above-described method within each frequency range after which the adjusted amplitudes are recombined. Amplitude variations caused by inconsistencies in the data acquisition system, such as a source strength variation, are also treated by a similar approach.

H4820, Jun 7, 1988

Oct 20, 1986

6/920552

John R. Berryhill - Houston TX
Ruth Gonzalez - Houston TX
Young C. Kim - Houston TX

G01V 100

367 38

A seismic data processing method in which seismic traces (each trace containing a signal resulting from reflection of a seismic signal at a location within the earth, and each trace being associated with at least one point in a two-dimensional spatial grid (x,y)) are subjected to Fourier transformations, the coefficients of the Fourier-Transformed traces are subjected to a recursive KF migration operation, and the migrated traces are thereafter inverse-Fourier-transformed. When displayed, the processed seismic data accurately represents the position within the earth of whatever caused the reflection. The method may be employed to process stacked seismic traces, each associated with a single point (x,y) in the grid, or may be employed to process unstacked seismic traces, each associated with both a seismic source location (x. sub. s,y. sub. 5) and a different seismic receiver location (x. sub. r,y. sub. r) in the grid.

5243563, Sep 7, 1993

Oct 2, 1992

7/957971

Young C. Kim - Houston TX

Exxon Production Research Company - Houston TX

G01V 136

367 50

The mispositioning of reflectors in a velocity analysis enhanced common-offset time migrated image is corrected by carrying out inverse migration on the time image, followed by zero-offset depth migration.