公开(公告)号：US09995835B2

公开(公告)日：2018-06-12

申请号：US13944653

申请日：2013-07-17

Applicant: Chevron U.S.A. Inc.

Inventor： Thor Johnsen ,  Alexander Loddoch ,  Wei Liu

IPC: G06G7/48 ,  G01V1/28 ,  G06F17/50 ,  G01V99/00

CPC classification number: G01V1/282 ,  G01V1/28 ,  G01V99/005 ,  G01V2210/673 ,  G06F17/5018

Abstract: Embodiments of a method for implementing a finite difference time domain modeling with multiple APCs are disclosed herein. The disclosed methods and systems overcome the memory capacity limitation of APCs by having each APC perform multiple timesteps on a small piece of the computational domain or data volume in a APC queued manner. The cost of transferring data between host and compute accelerator can then be amortized over multiple timesteps, greatly reducing the amount of PCI bandwidth required to sustain high propagation speeds. The APC queued nature of the algorithm achieves linear scaling of PCI throughput with increasing number of APCs, allowing the algorithm to scale up to many dozens of APCs in some embodiments.

公开(公告)号：US11079508B2

公开(公告)日：2021-08-03

申请号：US16163806

申请日：2018-10-18

Applicant: Chevron U.S.A. Inc.

Inventor： Lei Zhuo ,  Thor Johnsen ,  Kevin John Davies

IPC: G01V1/30 ,  G01V1/38

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.