Raymond L Abma

7197399, Mar 27, 2007

Apr 18, 2005

11/108250

Kenneth H. Matson - Houston TX, US
Raymond Abma - Houston TX, US

BP Corporation North America, Inc. - Warrenville IL

G01V 1/28

702 17

According to a preferred aspect of the instant invention, there is provided herein a system and method for removing or attenuating multiples in datasets that is much more efficient than methods used heretofore. The increases in efficiency principally originate in two algorithmic advances. First, the instant inventors have improved the overall efficiency of the conventional SRME process by reordering the computations in a novel way. Second, the instant inventors have conceived and developed a faster method of computing the DMO transformation step that is often used as one component of the SMRE process, thereby increasing the efficiency of the multiple removal process even further.

8103453, Jan 24, 2012

May 13, 2009

12/464907

Raymond L. Abma - Houston TX, US

BP Corporation North America Inc. - Houston TX

G01V 1/00
G06G 7/58

702 16, 703 10, 367 73

According to a preferred aspect of the instant invention, there is provided herein a system and method for Interpolation of seismic data with a POCS (projection onto convex sets) algorithm that can produce high quality interpolation results, at a reduced computational cost. In particular, optimizing the threshold calculations, allowing for aliased data, allowing the algorithm to skip unneeded Fourier transforms, and parallelization makes the method more practical and robust. Robust interpolation of aliased data may be done by limiting the calculations of the beginning iterations to the lowest temporal and spatial frequencies included in the data, then gradually allowing higher temporal and spatial frequencies into the following iterations.

8295124, Oct 23, 2012

Aug 17, 2009

12/542433

Raymond L. Abma - Houston TX, US

BP Corporation North America Inc. - Houston TX

G01V 1/00

367 38, 367 50

This is a method of separating simultaneous sources that uses an inversion-type approach. Each source will preferably activated at a random time with respect to the others. These random delays tend to make the interference between sources incoherent while the reflections create coherent events within a series of shots. The shot separation is performed via a numerical inversion process that utilizes the sweeps for each shot, the start times of each shot, and the coherence of reflection events between nearby shots. This method will allow seismic surveys to be acquired faster and cheaper.

8559270, Oct 15, 2013

Aug 6, 2010

12/851590

Raymond Lee Abma - Houston TX, US

BP Corporation North America Inc. - Houston TX

G01V 1/00
G01V 1/37

367 38, 367 50

This is a method of separating simultaneous sources that uses an inversion-type approach. Each source will preferably activated at a random time with respect to the others. These random delays tend to make the interference between sources incoherent while the reflections create coherent events within a series of shots. The shot separation is performed via a numerical inversion process that utilizes the sweeps for each shot, the start times of each shot, and the coherence of reflection events between nearby shots. Implementation of this method will allow seismic surveys to be acquired faster and cheaper.

20060155476, Jul 13, 2006

Apr 18, 2005

11/108249

Raymond Abma - Houston TX, US

G06F 19/00

702014000

According to a preferred aspect of the instant invention, there is provided herein a system and method for improving the computational efficiency of the DMO transformation that has many uses in the seismic processing arts. More particularly, the instant inventor has conceived and invented a faster method of calculating a log-stretch DMO transformation that utilizes multiple independent time windows, each with its own starting and ending time. A particularly preferred usage of the improved DMO method is as an element of a multiple attenuation program such as SRME.

20120033525, Feb 9, 2012

Aug 2, 2011

13/196614

Raymond Lee Abma - Houston TX, US
Gerard Beaudouin - Houston TX, US

BP CORPORATION NORTH AMERICA INC. - Houston TX

G01V 1/38

367 20

This is a method of acquiring marine wide azimuth towed streamer seismic data. Preferably, a recording boat which tows a plurality of seismic streamers and at least one source may be accompanied by a plurality of source boats that each tow at least one source. The source boats may preferably activate their respective sources such that the subsurface reflections generated by each source interfere. The time separation between successive shots may preferably be a random variable related to the lowest frequency of interest in the data. Additionally, the source boats may preferably be alternatively fired from the head and tail of the recording streamers.

20120147699, Jun 14, 2012

Dec 9, 2011

13/315925

Joseph A. Dellinger - Houston TX, US
Raymond Lee Abma - Houston TX, US

BP CORPORATION NORTH AMERICA INC. - Houston TX

G01V 1/38
G01V 1/24

367 15, 367 37

There is provided a method of seismic acquisition that utilizes a bank of restricted-bandwidth swept-frequency sub-band sources as a seismic source. Each seismic source will cover a restricted sub-band of frequencies, with all the sources taken together covering the full frequency range. Adjacent frequency bands may partially overlap, but non-adjacent frequency bands should not. The sources may be divided into two or more groups, with no sources covering adjacent frequency bands being placed in the same group. The sources within a group can then be separated by bandpass filtering or by conventional simultaneous source-separation techniques. The source groups may be operated simultaneously but separated in space, and the individual sources themselves may each operate independently, on a sweep schedule customized for that particular source.

20120147701, Jun 14, 2012

Dec 9, 2011

13/315947

Allan Ross - Houston TX, US
Raymond Lee Abma - Houston TX, US

BP Corporation North America Inc. - Houston TX

G01V 1/02
G01V 1/104
G01V 1/137
G01V 1/24
G01V 1/38

367 23, 367 37

The maximum output of a seismic source array may be reduced by activating the individual seismic sources within these seismic source array in a pattern that is extended in time rather than by the presently employed conventional simultaneous activation of a large number of individual seismic sources. Methods are disclosed which take data shot with patterned sources and may use a sparse inversion method to create data with the about same image quality as that of conventional sources. In this manner the output of the maximum impulse of a seismic source array may be reduced by an amplitude factor of about 10 in the examples shown here, corresponding to a reduction of about 20 dB while maintaining virtually the same seismic image quality. The disclosed methods may be used in combination with any simultaneous sourcing technique. In addition, the disclosed methods may be used with a plurality of source arrays.