Imtiaz Kha Ahmed

US Patent:

20110213556, Sep 1, 2011

Filed:

Mar 1, 2011

Appl. No.:

13/038234

Inventors:

Zhou Yu - Katy TX, US
Imtiaz Ahmed - Katy TX, US

Assignee:

BP CORPORATION NORTH AMERICA INC. - Warrenville IL

International Classification:

G01V 1/28

US Classification:

702 14

Abstract:

There is provided herein a New system arid method of local attribute match filtering which operates in the local attribute domain via the use of complex wavelet transform technology. This approach is adaptable to address various noise types in seismic data and, more particularly, is well suited to reduce the noise in geophone data as long as an associated hydrophone signal is relatively noise-free.

US Patent:

20220236435, Jul 28, 2022

Filed:

Mar 10, 2020

Appl. No.:

17/441372

Inventors:

- Houston TX, US
Imtiaz Ahmed - Katy TX, US
Andrew Brenders - Houston TX, US

Assignee:

BP Corporation North America Inc. - Houston TX

International Classification:

G01V 1/30
G01V 1/28

Abstract:

A method, and system to implement the process, of selecting a plurality of sets of source and receiver locations over a survey area, modeling on a subsurface attribute model of a subterranean region each source and receiver pair of the plurality of sets of source and receiver locations to generate low frequency seismic data, performing a reverse time migration on the low frequency seismic data to reposition diving wave energy of each source and receiver pair of the plurality of sets of source and receiver locations to generate a diving wave illumination image, extracting seismic amplitudes from the diving wave illumination image at a region of interest, and computing a contribution of a respective diving wave from each source and receiver pair of the plurality of sets of source and receiver locations to diving waves passing through the region of interest.

US Patent:

20210116592, Apr 22, 2021

Filed:

Oct 7, 2020

Appl. No.:

17/064678

Inventors:

- Houston TX, US
Imtiaz Ahmed - Katy TX, US

Assignee:

BP Corporation North America Inc. - Houston TX

International Classification:

G01V 1/30
G01V 1/34
G01V 1/137
G01V 1/18
G01V 1/38

Abstract:

A method includes receiving, via a processor, input data based upon received seismic data, migrating, via the processor, the input data via a pre-stack depth migration technique to generate migrated input data, encoding, via the processor, the input data via an encoding function as a migration attribute to generate encoded input data having a migration function that is non-monotonic versus an attribute related to the input data, migrating, via the processor, the encoded input data via the pre-stack depth migration technique to generate migrated encoded input data, and generating an estimated common image gather based upon the migrated input data and the migrated encoded input data. The method also includes generating a seismic image utilizing the estimated common image gather, wherein the seismic image represents hydrocarbons in a subsurface region of the Earth or subsurface drilling hazards.