Tamas Te Nemeth

US Patent:

8301385, Oct 30, 2012

Filed:

Jun 29, 2010

Appl. No.:

12/826176

Inventors:

Chaoshun Hu - San Ramon CA, US
Yue Wang - Danville CA, US
Tamas Nemeth - San Ramon CA, US

Assignee:

Chevron U.S.A. Inc. - San Ramon CA

International Classification:

G01V 1/28

US Classification:

702 14, 702 16, 702 17, 702181, 703 2, 367 38, 367 53

Abstract:

Beamed data can be obtained from shot gather data, and debeamed data can be obtained from beamed data. Shot gather data for a geophysical volume of interest in a first domain and/or beamed data in a third domain may be received. The first domain has a component relating to seismic wave propagation time and a spatial component relating to lateral spacing. The third domain has a component relating to local plane wave arrival time at a beam center surface location and a component relating to plane wave arrival directions. Data may be transformed between the first domain and a second domain. The second domain has a frequency component and a spatial component corresponding to the spatial component of the first domain. A forward or reverse transform may be applied to transform shot gather data in the first domain to/from beamed data in the third domain.

US Patent:

8326543, Dec 4, 2012

Filed:

Nov 20, 2009

Appl. No.:

12/623225

Inventors:

Tamas Nemeth - San Ramon CA, US
Norman Ross Hill - Houston TX, US

Assignee:

Chevron U.S.A. Inc. - San Ramon CA

International Classification:

G01V 1/02

US Classification:

702 14, 702 5, 702127

Abstract:

The present invention incorporates the use of model-driven and data-driven methodologies to attenuate multiples in seismic data utilizing a prediction model which includes multiply-reflected, surface-related seismic waves. The present invention includes beam techniques that account for beam azimuth, and convolving a predicted multiples beam with a segment of a modeled pegleg beam to obtain a convolved multiples beam. The convolved multiples beam can then be deconvolved to attenuate the multiples that are present in the original input beam.

US Patent:

8566376, Oct 22, 2013

Filed:

Jul 30, 2010

Appl. No.:

12/847243

Inventors:

Tamas Nemeth - San Ramon CA, US
Oliver Pell - London, GB
Raymond Ergas - San Clemente CA, US

Assignee:

Chevron U.S.A. Inc. - San Ramon CA

International Classification:

G06F 7/00

US Classification:

708203

Abstract:

A system and method for compressing and/or decompressing data uses a field programmable gate array (FPGA). In an embodiment, the method includes receiving data at the FPGA device, filtering the received data in a first dimension using a first logic structure of the FPGA device, storing the first filtered data in a memory of the FPGA device, filtering the received data in a second dimension using a second logic structure of the FPGA device, storing the second filtered data in the memory, quantizing the filtered data using a third logic structure of the FPGA device, encoding the quantized data using a fourth logic structure of the FPGA device to compress the data, and storing the encoded compressed data in a memory of the FPGA device.

US Patent:

20080294346, Nov 27, 2008

Filed:

May 22, 2007

Appl. No.:

11/751975

Inventors:

Tamas Nemeth - San Ramon CA, US
Yue Wang - San Ramon CA, US
Fuhao Qin - Spring TX, US
N. Ross Hill - Houston TX, US

International Classification:

G01V 1/28
G06F 17/50

US Classification:

702 17, 703 2

Abstract:

The present invention incorporates the use of model-driven and data-driven methodologies to attenuate multiples in seismic data utilizing a prediction model which includes multiply-reflected, surface-related seismic waves. The present invention includes beam techniques and convolving a predicted multiples beam with a segment of a modeled pegleg beam to obtain a convolved multiples beam. The convolved multiples beam can then he deconvolved to attenuate the multiples that are present in the original input beam.

US Patent:

20100118651, May 13, 2010

Filed:

Sep 24, 2009

Appl. No.:

12/566252

Inventors:

Wei Liu - San Ramon CA, US
Tamas Nemeth - San Ramon CA, US
Raymond Ergas - San Clemente CA, US
Oliver Pell - London, GB

International Classification:

G01V 1/28

US Classification:

367 50

Abstract:

A method and system for generating images of a subsurface region of interest. In general, one embodiment of the present invention includes establishing boundary conditions utilizing seismic data and initial conditions which include excitation from source locations in an earth model. Source wavefields are then propagated forward through the earth model to a maximum time, and saved at a plurality of checkpoints sparsely in time and also corresponding boundary values of the source wavefields at each time step are saved. Source wavefields are also propagated backward through the earth model from the maximum time utilizing the plurality of checkpoints when available and the saved boundary values at each time step. Receiver wavefields are propagated backward concurrently through the earth model from the maximum time. Imaging conditions are applied at selected time steps to both the backward propagated source wavefields and receiver wavefields and those wavefields are utilized to generate images related to the subsurface region.

US Patent:

20120331191, Dec 27, 2012

Filed:

Aug 29, 2012

Appl. No.:

13/597466

Inventors:

Oliver Pell - London, GB
Tamas Nemeth - San Ramon CA, US
Raymond Ergas - San Clemente CA, US

Assignee:

Chevron U.S.A. Inc. - San Ramon CA

International Classification:

G06F 13/42

US Classification:

710 68

Abstract:

A system and method for processing seismic data on one or more co-processor devices that are operatively coupled to a host computing system via a communications channel. The compression of input data transmitted to the co-processor device and/or the size of the storage provided on the co-processor device may enhance the efficiency of the processing of the data on the peripheral device by obviating a bottleneck caused by the relatively slow transfer of data between the host computing system and the co-processor device or by the relatively slow transfer of data within the co-processor device between the co-processor information storage and the co-processor.

US Patent:

20220290559, Sep 15, 2022

Filed:

Mar 12, 2021

Appl. No.:

17/200677

Inventors:

- San Ramon CA, US
Tamas Nemeth - Palo Alto CA, US
David C. Bartel - Houston TX, US
Zhishuai Zhang - Houston TX, US
Yunhui Tan - Houston TX, US
Joseph P. Stefani - San Ramon CA, US
James P. DiSiena - Houston TX, US
Dimitri Bevc - Houston TX, US
Kelly Hughes - Houston TX, US

International Classification:

E21B 47/135
E21B 47/107
G06N 3/04
G06N 20/00
E21B 49/00

Abstract:

A method is described for predicting and preventing wellbore interactions at wells that are near the injection well. The method includes receiving fiber optics data; performing object detection by detecting object-like events in the fiber optic data; and sending instructions to a hydraulic fracturing system based on the object detection. The method is executed by a computer system.

US Patent:

20160291180, Oct 6, 2016

Filed:

Mar 30, 2016

Appl. No.:

15/084657

Inventors:

- San Ramon CA, US
Kenneth Paul BUBE - Seattle WA, US
Raymond Andrew ERGAS - San Clemente CA, US
Tamas NEMETH - Palo Alto CA, US

International Classification:

G01V 1/30
G01V 1/28

Abstract:

A method is described that includes receiving one or more seismic measurements corresponding to a plurality of source and receiver locations and providing an earth model for a geologic medium having a heterogeneous tilted symmetry axis. The earth model includes a nonzero shear velocity in the direction of the symmetry axis. The one or more seismic measurements are propagated over a plurality of time-steps in accordance with the earth model and a set of energy-conservative self-adjoint pseudoacoustic equations. The set of energy-conservative self-adjoint pseudoacoustic equations describes one or more seismic wavefields.