DIMITRI BEVC
Pilots at Bevilacqua Ct, Pleasanton, CA

6546339, Apr 8, 2003

Jun 8, 2001

09/877133

Dimitri Bevc - Pleasanton CA
Wei Liu - San Jose CA
Alexander M. Popovici - Portola Valley CA

3D Geo Development, Inc. - Mountain View CA

G01V 128

702 18

Migration velocity analysis is performed using Angle-Domain Common Image Gathers (ACIGs). When the correct velocity model is employed for migration, all ACIG events corresponding to a subsurface location are aligned along a horizontal line. Residual moveout can be performed on each ACIG with a suite of trial residual velocity values, according to an angle-domain residual moveout equation. A best-fit residual velocity value that leads to horizontally-aligned events upon moveout can be selected by generating a distribution of semblance (amplitude summed over a given depth) over residual velocity. Best-fit residual velocity values corresponding to selected subsurface points can be employed to update the initial velocity model using a vertical update, normal ray update, or tomographic update method.

6778909, Aug 17, 2004

Jan 21, 2003

10/348545

Alexander M. Popovici - Portola Valley CA
Sean E. Crawley - Katy TX
Dimitri Bevc - Pleasanton CA
Biondo Biondi - Stanford CA

3DGeo Development, Inc. - Santa Clara CA

G01V 128

702 17

In one embodiment, a computer-implemented common azimuth migration seismic data processing method comprises: providing a common-azimuth input data set for a geophysical data processing volume of interest; providing a velocity model for the volume; applying an offset antialiasing operator to the input data set; and performing a recursive downward-continuation of the common-azimuth input data set to a plurality of successive common-azimuth surfaces to generate an image of the volume of interest. In one embodiment, the present invention further provides for selecting a depth dependence of an offset range employed in the downward continuation; selecting a frequency-dependence of a depth step size employed in the downward continuation; selecting a frequency dependence of a cutoff depth employed in the downward continuation; and adding reciprocal traces to the data around zero offset, for reducing imaging artifacts introduced by data edge effects. Similar methods can be applied with a narrow-azimuth downward continuation operator.

6687618, Feb 3, 2004

Aug 7, 2001

09/924123

Dimitri Bevc - Pleasanton CA
Alexander M. Popovici - Portola Valley CA
Wei Liu - San Jose CA

3D Geo Development, Inc. - Santa Clara CA

G01V 128

702 14, 702 18

A seismic velocity analysis method includes tying velocity parameter values such as residual velocity values to geological horizons (reflectors) within a seismic exploration volume. Common image gathers (CIGs) such a common reflection point (CRP) gathers or angle-domain common image gathers (ACIGs) are generated for a set of CIG grid points. Computed best-fit residual velocity values are then snapped to a neighboring horizon or vertically interpolated to the horizon, to generate residual velocity values along the horizon. The residual velocity values for points along the horizon are then selectively employed in updating the velocity model for the volume of interest.

6493635, Dec 10, 2002

Nov 1, 2000

09/705039

Dimitri Bevc - Pleasanton CA
Ovidiu Feodorov - San Jose CA
Biondo Biondi - Stanford CA
Alexander M. Popovici - Portola Valley CA

3DGeo Development, Inc. - Mountain View CA

G01V 128

702 14

Geophysical data processing is remotely controlled and monitored over a wide-area network such as the Internet. A customer using a client computer builds geophysical data processing flows (concatenations of geophysical data processing modules or filters) and enters parameter values required for flow execution. The flow descriptions and associated parameter values are then transferred from the client to a geophysical data processing server, for example a parallel supercomputer. The flows (jobs) are executed on the server, typically over periods ranging from hours to weeks. Intermediate or partial results are made available to the customer for visualization before the processing of a flow is complete. The customer can then modify the flow before its complete execution. Data-entry windows are automatically generated for geophysical processing modules by parsing the source code of the modules.

6625543, Sep 23, 2003

Sep 5, 2002

10/235877

Dimitri Bevc - Pleasanton CA
Sean E. Crawley - Katy TX
Alexander M. Popovici - Portola Valley CA

3DGeo Development, Inc. - Santa Clara CA

G06F 1900

702 14, 703 5

Input seismic data are re-gridded to an arbitrary output grid by output-based azimuth moveout. An input seismic data set corresponding to an input grid is used to generate an equivalent output seismic data set corresponding to an output grid different from the input grid. Preferably, the output grid is divided into blocks, and each output grid block is assigned to one of a plurality of independent parallel processors. For each output trace corresponding to an output location, the contributions of plural input traces to the output trace are computed according to an azimuth moveout operator. The contributions are then summed into the output trace.

8429222, Apr 23, 2013

Dec 9, 2002

10/315752

Dimitri Bevc - Pleasanton CA, US
Ovidiu Feodorov - Mountain View CA, US
Biondo Biondi - Stanford CA, US
Alexander M Popovici - Portola Valley CA, US

3DGEO Inc. - Santa Clara CA

G06F 15/16

709203

Geophysical data processing is remotely controlled and monitored over a wide-area network such as the Internet. A customer using a client computer builds geophysical data processing flows (concatenations of geophysical data processing modules or filters) and enters parameter values required for flow execution. The flow descriptions and associated parameter values are then transferred from the client to a geophysical data processing server, for example a parallel supercomputer. The flows (jobs) are executed on the server, typically over periods ranging from hours to weeks. Intermediate or partial results are made available to the customer for visualization before the processing of a flow is complete. The customer can then modify the flow before its complete execution. Data-entry windows are automatically generated for geophysical processing modules by parsing the source code of the modules.

2009025, Oct 15, 2009

Apr 11, 2008

12/082474

Dimitri Bevc - Pleasanton CA, US
Moritz Matthias Fliedner - San Francisco CA, US

G01V 1/28

367 53

A method of performing migration velocity analysis may include: obtaining seismic data and an initial velocity model; determining reflection points; deriving a wavepath backprojection operator based on the initial velocity model and the reflection points by constructing wavepaths from each reflection point of the reflection points; and performing a traveltime inversion using the wavepath backprojection operator. The initial velocity model may be updated based on the traveltime inversion. Determining reflection points may be automated by calculating reflection points based on results from a depth migration algorithm performed on the initial velocity model. Selection of residual moveout values may be automated by selecting based on a dip field for each prestack gather obtained from a depth migration algorithm performed on the initial velocity model. Residual traveltimes may be calculated using the selected residual moveout values. The residual traveltimes may be used in the traveltime inversion.

7031842, Apr 18, 2006

Feb 26, 2004

10/787505

Iulian Musat - Houston TX, US
Ovidiu Feodorov - Mountain View CA, US
Dimitri Bevc - Pleasanton CA, US
Alexander M. Popovici - Katy TX, US

3DGeo Development, Inc. - Santa Clara CA

G06F 19/00, G01V 9/00

702 16

In one embodiment, a computer-implemented seismic viewing/editing collaboration method includes performing real-time collaborative cursor tracking, copaging, picking, and image manipulation in a distributed-display-processing, peer-to-peer architecture. A parameterized, minimal set of information required to update a display is transferred directly between different clients. A group state containing events generated by different clients is enforced to be synchronized on the different clients.