公开(公告)号：US20170176616A1

公开(公告)日：2017-06-22

申请号：US14975997

申请日：2015-12-21

Applicant: CHEVRON U.S.A. INC.

Inventor： Yonghe Sun ,  Guojian Shan ,  Yue Wang ,  Craig Alan Barker

IPC: G01V1/30 ,  G01V1/36

CPC classification number: G01V1/306 ,  G01V1/362 ,  G01V2210/51 ,  G01V2210/514

Abstract: A method is described for seismic imaging of the subsurface using dip-guided optimized stacking. The method computes weighting functions for a plurality of single-shot migrated images, unstacked seismic images, or partially stacked seismic images based on a slant stack performed using an input dip dataset; applying the plurality of weighting functions to the plurality of single-shot migrated images, unstacked seismic images, or partially stacked seismic images, or a plurality of dip-filtered images to create a plurality of weighted images; and summing the plurality of weighted images into a stacked seismic image. The method may be executed by a computer system.

公开(公告)号：US20240192390A1

公开(公告)日：2024-06-13

申请号：US18062989

申请日：2022-12-07

Applicant: Chevron U.S.A. Inc.

Inventor： Guojian Shan ,  Jingru Chen ,  Leonard Lin Zhang

IPC: G01V1/30 ,  G01V1/28

CPC classification number: G01V1/303 ,  G01V1/282

Abstract: A method is described for determining subsurface earth properties using a full waveform inversion that solves the problem of cycle skipping. The method uses cross-correlation, time shifting, and decorrelation as part of the full waveform inversion to find the data residual that is inverted to calculate the model residual. The method is executed by a computer system.

公开(公告)号：US20240118441A1

公开(公告)日：2024-04-11

申请号：US17938657

申请日：2022-10-06

Applicant: Chevron U.S.A. Inc.

Inventor： Guojian Shan

IPC: G01V1/34

CPC classification number: G01V1/345 ,  G01V2210/74

Abstract: A method is described for seismic imaging including receiving a full waveform inversion (FWI) image of a subsurface volume of interest including complex geology; transforming the FWI image to the Fourier domain to generate a Fourier domain image; performing a multi-dimensional low-cut filter of the Fourier domain image to generate a low-cut filter image; phase rotating by 90 degrees the low-cut filter image to generate a phase-rotated image; performing an inverse Fourier transform on the phase-rotated image to generate a transformed image; and displaying the transformed image on a graphical display. The method is executed by a computer system.

公开(公告)号：US11360230B2

公开(公告)日：2022-06-14

申请号：US16705013

申请日：2019-12-05

Applicant: Chevron U.S.A. Inc.

Inventor： Siwei Li ,  Guojian Shan ,  Yue Wang

IPC: G01V1/36 ,  G01V1/28 ,  G01V1/30 ,  G06F17/16

Abstract: A method is described for seismic inversion including receiving a processed seismic image and an enhanced seismic image representative of a subsurface volume of interest; forward modeling the processed seismic image and the enhanced seismic image to generate a first modeled dataset and a second modeled dataset; differencing the first modeled dataset and the second modeled dataset to create a residual dataset; filtering the first modeled dataset to generate an approximation of illumination; preconditioning the residual dataset with the approximation of illumination to generate an adjoint source; back projecting the adjoint source to determine a model update; and applying the model update to an earth model of the subsurface volume of interest.

公开(公告)号：US11320556B2

公开(公告)日：2022-05-03

申请号：US16548582

申请日：2019-08-22

Applicant: Chevron U.S.A. Inc.

Inventor： Guojian Shan ,  Yue Wang ,  Siwei Li

IPC: G01V1/34 ,  G01V1/28 ,  G01V1/30 ,  G01V1/36

Abstract: A method is described for seismic imaging including generating extended image gathers by extended reverse time migration of a seismic dataset using an earth model; processing the extended image gathers to generate processed image gathers; performing extended modeling based on the processed image gathers to generate a modeled seismic dataset; enhancing the processed image gathers to generate an enhanced image; performing extended modeling based on the enhanced image gathers to generate a modeled enhanced dataset; differencing the modeled enhanced dataset and the modeled seismic dataset to determine a data residual; inverting the data residual to generate a model residual; updating the earth model based on the model residual to create an updated earth model; performing seismic imaging of the seismic dataset using the updated earth model to create an improved seismic image. The method may be executed by a computer system.

公开(公告)号：US20210173109A1

公开(公告)日：2021-06-10

申请号：US16705013

申请日：2019-12-05

Applicant: Chevron U.S.A. Inc.

Inventor： Siwei Li ,  Guojian Shan ,  Yue Wang

IPC: G01V1/36 ,  G01V1/28 ,  G01V1/30 ,  G06F17/16

Abstract: A method is described for seismic inversion including receiving a processed seismic image and an enhanced seismic image representative of a subsurface volume of interest; forward modeling the processed seismic image and the enhanced seismic image to generate a first modeled dataset and a second modeled dataset; differencing the first modeled dataset and the second modeled dataset to create a residual dataset; filtering the first modeled dataset to generate an approximation of illumination; preconditioning the residual dataset with the approximation of illumination to generate an adjoint source; back projecting the adjoint source to determine a model update; and applying the model update to an earth model of the subsurface volume of interest. The method may be executed by a computer system.