# US 11,079,508 B2 · System and method for marine seismic modeling

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- Number: US 11,079,508 B2
- Document ID: US11079508B2
- Status: Granted
- Kind: B2
- Application number: 16/163,806
- Filed: 2018-10-18
- Published: 2020-04-23
- Granted: 2021-08-03
- Earliest claimed: 2018-10-18
- Assignees: Chevron U.S.A. Inc.
- Applicants: Chevron U.S.A. Inc.
- Inventors: Lei Zhuo; Thor Johnsen; Kevin John Davies
- Web page: https://patentgrep.com/patent/US11079508B2

## CPC

- G01V 1/308: {Time lapse or 4D effects, e.g. production related effects to the formation (fluid flow per se E21B47/00)}
- G01V 99/00: Subject matter not provided for in other groups of this subclass
- G01V 1/302: {in 3D data cubes}
- G01V 1/305: {Travel times}
- G01V 1/3808: {Seismic data acquisition, e.g. survey design}
- G01V 2210/612: Previously recorded data, e.g. time-lapse or 4D
- G01V: GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS (means for indicating the location of accidentally buried, e.g. snow-buried, persons A63B29/02)

## Abstract

A method is described for seismic modeling implemented on a computer system including multiple computer nodes, which includes receiving, at a computer processor, a 4D speed of sound in water library and a marine seismic survey geometry; creating, via the computer processor, a full survey 3D Earth model for each seismic shot time based on the 4D speed of sound in water library to generate a set of dynamic 3D Earth models; simulating 4D seismic shots for the set of dynamic 3D Earth models by simulating multiple shots on each node to generate a set of 4D seismic shot gathers; and outputting the 4D seismic shot gathers.

## Claims

### Claim 1

A method of seismic modeling implemented on a computer system including multiple computer nodes, comprising:
a. receiving, at a computer processor, a 4D water velocity library and a marine seismic survey geometry;
b. creating, via the computer processor, a full survey 3D Earth model for each seismic shot time based on the 4D water velocity library to generate a set of dynamic 3D Earth models;
c. simulating 4D seismic shots for the set of dynamic 3D Earth models by simulating multiple shots on each computer node to generate a set of 4D seismic shot gathers; and
d. outputting the 4D seismic shot gathers.

### Claim 2 (depends on 1)

The method of claim 1 wherein the 4D water velocity library is derived from field measurements.

### Claim 3 (depends on 1)

The method of claim 1 wherein the simulating 4D seismic shots is done by forward modeling using finite difference modeling.

### Claim 4 (depends on 3)

The method of claim 3 wherein the finite difference modeling includes modifying the parallel architecture and memory allocation of a computer node to fit multiple shots on the computer node.

### Claim 5 (depends on 1)

The method of claim 1 further comprising using the 4D seismic shot gathers to evaluate improved seismic survey parameters.

### Claim 6

A computer system, comprising:
one or more processors;
memory; and
one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs including instructions that when executed by the one or more processors cause the system to:
a. receive, at a computer processor, a 4D water velocity library and a marine seismic survey geometry;
b. create, via the computer processor, a full survey 3D earth model for each seismic shot time based on the 4D water velocity library to generate a set of dynamic 3D earth models;
c. simulate 4D seismic shots for the set of dynamic 3D Earth models by simulating multiple shots on each node to generate a set of 4D seismic shot gathers; and
d. output the 4D seismic shot gathers.

### Claim 7

A non-transitory computer readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by an electronic device with one or more processors and memory, cause the device to
a. receive, at a computer processor, a 4D water velocity library and a marine seismic survey geometry;
b. create, via the computer processor, a full survey 3D Earth model for each seismic shot time based on the 4D water velocity library to generate a set of dynamic 3D Earth models;
c. simulate 4D seismic shots for the set of dynamic 3D earth models by simulating multiple shots on each node to generate a set of 4D seismic shot gathers; and
d. output the 4D seismic shot gathers.