公开(公告)号：US11262469B2

公开(公告)日：2022-03-01

申请号：US16529870

申请日：2019-08-02

Applicant: Chevron U.S.A. Inc.

Inventor： Prasenjit Roy ,  Anandaroop Ray ,  Reynaldo Cardona ,  David C. Bartel ,  Jacob G. Tesfaye

IPC: G01V1/30 ,  G01V1/34

Abstract: A method is described for seismic amplitude analysis including receiving a seismic dataset representative of a subsurface volume of interest wherein the seismic dataset includes an angle or angle stack dimension; select a plurality of sets of sub-cubes in the seismic dataset wherein each set of sub-cubes includes a plurality of the angles or the angle stacks; compute standard score statistics for each of the plurality of sub-cubes; identify amplitude variation with angle (AVA) anomalies based on the standard score statistics for each of the set of sub-cubes; classify the AVA anomalies to generate classified AVA anomalies; and displaying, on a user interface, the classified AVA anomalies as a graphical display. The method is executed by a computer system.

公开(公告)号：US11275193B2

公开(公告)日：2022-03-15

申请号：US16227944

申请日：2018-12-20

Applicant: Chevron U.S.A. Inc.

Inventor： Anandaroop Ray ,  Michael Greene ,  Mason Edwards ,  Reynaldo Cardona

IPC: G01V1/48 ,  G01V13/00 ,  G01V1/30 ,  G01V1/28

Abstract: Methods and systems for calibrating depth in a well to seismic data in a subsurface volume of interest are disclosed. Exemplary implementations may: obtain well data corresponding to the well in the subsurface volume of interest; convert the well data to converted well data; obtain a seismic trace and a corresponding wavelet; generate a transform model; apply the transform model to the converted well data to transform the converted well data into transformed well data; apply the corresponding wavelet to the transformed well data to generate a modified signal; generate a correspondence between the modified signal and the seismic trace; repeat one or more steps to select a given modified signal; and calibrate the well data to the seismic trace.

公开(公告)号：US20190302294A1

公开(公告)日：2019-10-03

申请号：US15943513

申请日：2018-04-02

Applicant: Chevron U.S.A. Inc.

Inventor： Anandaroop Ray ,  Prasenjit Roy ,  Jim Magill ,  David Bartel ,  Reynaldo Cardona ,  Kabilan Krishnamurthy

IPC: G01V1/30 ,  G01V1/34

Abstract: Systems and methods for refining estimated effects of parameters on amplitudes are disclosed. Exemplary implementations may: (a) obtain ranges of parameter values for individual parameters within a subsurface region of interest; (b) generate a first model of the subsurface region of interest; (c) calculate a synthetic seismogram from the first model to determine corresponding amplitudes; (d) store results of applying the synthetic seismogram; (e) repeat steps (b)-(d) for multiple additional models; (f) obtain a subsurface distribution; (g) apply the subsurface distribution to the multiple models and the corresponding amplitudes; (h) generate a representation; and (i) display the representation.

公开(公告)号：US10670755B2

公开(公告)日：2020-06-02

申请号：US15943513

申请日：2018-04-02

Applicant: Chevron U.S.A. Inc.

Inventor： Anandaroop Ray ,  Prasenjit Roy ,  James Magill ,  David Bartel ,  Reynaldo Cardona ,  Kabilan Krishnamurthy

IPC: G01V1/30 ,  G01V1/34

Abstract: Systems and methods for refining estimated effects of parameters on amplitudes are disclosed. Exemplary implementations may: (a) obtain ranges of parameter values for individual parameters within a subsurface region of interest; (b) generate a first model of the subsurface region of interest; (c) calculate a synthetic seismogram from the first model to determine corresponding amplitudes; (d) store results of applying the synthetic seismogram; (e) repeat steps (b)-(d) for multiple additional models; (f) obtain a subsurface distribution; (g) apply the subsurface distribution to the multiple models and the corresponding amplitudes; (h) generate a representation; and (i) display the representation.

公开(公告)号：US20190011583A1

公开(公告)日：2019-01-10

申请号：US16027599

申请日：2018-07-05

Applicant: Chevron U.S.A. Inc.

Inventor： Anandaroop Ray ,  Sam T. Kaplan ,  John Kenneth Washbourne ,  Uwe K. Albertin

IPC: G01V1/30

Abstract: A method is described for full waveform inversion using a tree-based Bayesian approach which automatically selects the model complexity, thereby reducing the computational cost. The method may be executed by a computer system.