Ronald C Chambers

US Patent:

6697737, Feb 24, 2004

Filed:

Sep 24, 2001

Appl. No.:

09/961505

Inventors:

Neil Jones - Richmond, GB
Andrew Ashby - Twickenham, GB
Ronald E. Chambers - Houston TX

Assignee:

WesternGeco LLC - Houston TX

International Classification:

G01V 128

US Classification:

702 2, 703 10

Abstract:

Attributes of a seismic data set that are indicative of the quality of the seismic data are displayed in a quality control (QC) hypercube. The axes of the hypercube may be the source position, the source line, the receiver position and a processing step. In a pre-migration QC cube, two of the three axes of the cube are defined by the locations of seismic data. In a migrated QC cube, two of the three axes are defined by the migrated output bin position of processed seismic data. The third axis of the cube contains information about the quality of the data. The QC attributes may be simple amplitudes, or they may be attributes derived from the amplitudes of the seismic data, such as RMS values and/or spectral values. In a migrated QC cube, the attributes may include seismic velocity, seismic fold and distribution of source-receiver azimuths.

US Patent:

54793769, Dec 26, 1995

Filed:

Aug 30, 1993

Appl. No.:

8/114558

Inventors:

Alfonso Gonzalez - Sugar Land TX
Ronald E. Chambers - Houston TX

Assignee:

Western Atlas International, Inc. - Houston TX

International Classification:

G01V 126
G01V 128

US Classification:

367 47

Abstract:

The relative amplitudes of seismic reflection data contains very useful information about the subsurface earth formations. Surface and subsurface-consistent amplitude processing identifies and corrects for the variability introduced by instrumentation and surface distortions. Dynamic amplitude decomposition, the subject of this disclosure, identifies and compensates for reflection amplitude fading due to subsurface transmission absorption media.

US Patent:

60117524, Jan 4, 2000

Filed:

Aug 3, 1998

Appl. No.:

9/128336

Inventors:

Loran D. Ambs - Fulshear TX
Ronald E. Chambers - Houston TX

Assignee:

Western Atlas International, Inc. - Houston TX

International Classification:

G01V 100

US Classification:

367 17

Abstract:

A seismic streamer position control module has been invented having a body with a first end and a second end and a bore therethrough from the first end to the second end for receiving a seismic streamer therethrough, at least one control surface, and at least one recess in which is initially disposed the at least one control surface, the at least one control surface movably connected to the body for movement from and into the at least one recess and for movement, when extended from the body, for attitude adjustment. In one aspect the seismic streamer position control module body has tapered ends.

US Patent:

60185007, Jan 25, 2000

Filed:

Feb 19, 1999

Appl. No.:

9/252833

Inventors:

Ronald E. Chambers - Houston TX

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

G01V 100

US Classification:

367 73

Abstract:

A conventional CMP gather is Radon transformed from t-x space to the. tau. -p domain. The Radon-transformed data are windowed or zoned into a plurality of data sets, each having an common independent range of selected characteristics. All except one data set are muted. The zero ordinate of the p-axis is shifted to become centered through the contents of the retained data set which is then inverse-transformed back to t-x space. The process is repeated for each of the remaining windowed data sets. The processed windowed data sets are summed.

US Patent:

51289040, Jul 7, 1992

Filed:

Oct 11, 1991

Appl. No.:

7/775112

Inventors:

Ronald E. Chambers - Houston TX

Assignee:

Western Atlas International, Inc. - Houston TX

International Classification:

G01S 380

US Classification:

367129

Abstract:

A method is disclosed for determining the separation between a seismic energy source and a seismic sensor, the location of which is known imperfectly. After the source emits a wavefield, the first-arriving impulse at the sensor is statistically processed to form a range statistic that is related to the true travel time between the source and the sensor. A set of range statistics from a plurality of source positions are filtered and converted to range loci, the intersection of which marks the location of the sensor.

US Patent:

57904723, Aug 4, 1998

Filed:

Dec 20, 1996

Appl. No.:

8/771049

Inventors:

Ricky L. Workman - Houston TX
Ronald Edward Chambers - Houston TX

Assignee:

Western Atlas International, Inc. - Houston TX

International Classification:

G01V 138

US Classification:

367 19

Abstract:

A method for controlling the position and shape of marine seismic streamer cables, whereby a plurality of real time signals from a marine seismic data acquisition system and a plurality of threshold parameters from an input device are received. The real time signals are compared to the threshold parameters to determine if the streamer cables should be repositioned. The streamer cables are repositioned when the real time signals exceed the threshold parameters.

US Patent:

59700238, Oct 19, 1999

Filed:

Feb 19, 1999

Appl. No.:

9/253617

Inventors:

Ronald E. Chambers - Houston TX
Necati Gulunay - Missouri City TX

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

G01V 136
G01V 100

US Classification:

367 63

Abstract:

Marine seismic data sets are generally under-sampled spatially because of the relatively long listening times required in deep water. It is customary to use very long spreads in the field thereby enhancing aliasing and interference from coherent noise. A seismic-signal data processing method is proposed that applies a combination of a forward parabolic Radon transform and a linear Radon transform to the data, followed by a further transform to a three-dimensional frequency domain. In this domain, a deterministic operator is applied to the data to sharpen the Radon-domain response thereof. The data are then scavenged of noise in the Radon domain and inversely transformed back into the time-space domain.

US Patent:

49929933, Feb 12, 1991

Filed:

Jun 18, 1990

Appl. No.:

7/539239

Inventors:

Ronald E. Chambers - Houston TX

Assignee:

Western Atlas International, Inc. - Houston TX

International Classification:

G01V 122
G01V 138

US Classification:

367 21

Abstract:

In a marine seismic survey, a method for measuring the acoustic properties of the water mass at each seismic station along a line of survey by recovering acoustic reflections from discrete discontinuities within the water above the water-bottom reflection. A profile of the velocity distribution within the water column is calculated from a conventional velocity analysis.