公开(公告)号：US20190129048A1

公开(公告)日：2019-05-02

申请号：US15928130

申请日：2018-03-22

Applicant: CHEVRON U.S.A. INC.

Inventor： James R. MAGILL ,  David C. BARTEL

IPC: G01V1/28 ,  G01V1/30

CPC classification number: G01V1/282 ,  G01V1/30 ,  G01V1/306 ,  G01V1/307 ,  G01V1/308 ,  G01V2210/612 ,  G01V2210/614 ,  G01V2210/62 ,  G01V2210/63 ,  G01V2210/632 ,  G01V2210/665

Abstract: A computer-implemented method is described for a manner of geologic analysis using time-lapse seismic data. The method includes steps of receiving a first seismic attribute volume inverted from a seismic dataset recorded at a first time, a second digital seismic attribute volume inverted from a seismic dataset recorded at a second time, and a range of geological and geophysical parameters possible in the subsurface volume of interest; identifying a layer and area of interest; computing an attribute difference volume from the seismic attribute volumes; performing probabilistic attribute analysis of at least two of the first digital seismic attribute volume, the second digital seismic attribute volume, and the attribute difference volume using the range of geological and geophysical parameters; estimating time-lapse reservoir properties based on the probabilistic attribute analysis; and outputting visual information depicting the time-lapse reservoir properties via a user interface.

公开(公告)号：US20200041677A1

公开(公告)日：2020-02-06

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：US20190129049A1

公开(公告)日：2019-05-02

申请号：US15794058

申请日：2017-10-26

Applicant: CHEVRON U.S.A. INC.

Inventor： James R. MAGILL ,  David C. BARTEL

IPC: G01V1/28

CPC classification number: G01V1/288 ,  G01V1/282 ,  G01V1/30 ,  G01V1/307 ,  G01V1/308 ,  G01V2210/1234 ,  G01V2210/65 ,  G01V2210/66

Abstract: A method is described for a manner of geologic analysis using time-lapse seismic data. The method includes steps to produce improved amplitude versus angle (AVA) information that may be used for analysis of geologic features of interest including estimation of pore fluid content and changes in the pore fluid content. The method assesses the probability of hydrocarbons in a subterranean reservoir based on seismic amplitude variations along offsets or angles for portions of a seismic horizon. The method may be executed by a computer system.