Multi-vintage energy mapping

Patent metadata

Field	Value
Publication number	US-10605939-B2
Application number	US-201515521331-A
Country	US
Kind code	B2
Filing date	Oct 26, 2015
Priority date	Oct 27, 2014
Publication date	Mar 31, 2020
Grant date	Mar 31, 2020

Abstract

Multi-vintage energy mapping selects a first seismic survey data and a second seismic survey dataset from a plurality of seismic survey datasets. The first seismic survey dataset includes a set of first energies associated with a first seismic survey geometry, and the second seismic survey dataset includes a set of second energies associated with a second seismic survey geometry. The first set of energies are mapped from the first seismic survey geometry to the second seismic survey geometry, and the second set of energies are mapped from the second seismic survey geometry to the first seismic survey geometry. An updated first seismic dataset and an updated second seismic dataset are generated such that only energies from the first and second seismic datasets associated with changes in a subsurface are preserved in the updated first and second seismic datasets.

First claim

What is claimed is:

1. A method for multi-vintage energy mapping to observe evolution of a subsurface, the method comprising:
selecting a first seismic survey dataset and a second seismic survey dataset from a plurality of seismic survey datasets acquired over the subsurface, the first seismic survey dataset comprising a set of first energies associated with a first seismic survey geometry and the second seismic survey dataset comprising a set of second energies associated with a second seismic survey geometry;
mapping the first set of energies from the first seismic survey geometry to the second seismic survey geometry;
mapping the second set of energies from the second seismic geometry to the first seismic survey geometry; and
generating an updated first seismic survey dataset by extracting a first common part of the second set of energies and the first set of energies mapped at the second seismic survey geometry, and an updated second seismic survey dataset by extracting a second common part of the second set of energies mapped at the first seismic survey geometry so that energies associated with changes in the subsurface occurring between acquiring the first dataset and acquiring the second dataset are preserved in the updated first and second seismic survey datasets to enable observing evolution of the subsurface.

2. The method of claim 1 , wherein:
the first seismic survey dataset and the second seismic survey dataset were obtained at different times; and
physical locations at which energies in the first set of energies and the second set of energies were obtained vary.

3. The method of claim 1 , wherein:
the first seismic survey dataset and the second seismic survey dataset pertain to a pair among a plurality of pairs of first and second seismic survey datasets selected from the plurality of seismic survey datasets, each first seismic survey dataset in each pair comprising the set of first energies associated with the first seismic survey geometry and each second seismic survey dataset in the pair comprising the set of second energies associated with the second seismic survey geometry;
mapping the first set of energies comprises mapping the first set of energies from each first seismic survey geometry in a given pair to the second seismic survey geometry of that given pair;
mapping the second set of energies comprises mapping the second set of energies from each second seismic survey geometry in a given pair to the first seismic survey geometry of that given pair; and
generating the updated first seismic survey dataset and the updated second seismic survey dataset comprises generating the updated first seismic survey dataset and the updated second seismic survey dataset for each pair.

4. The method of claim 1 , wherein:
the first set of energies comprises a plurality of first seismic traces; and
the second set of energies comprises a plurality of second seismic traces.

5. The method of claim 4 , wherein:
mapping the first set of energies comprises interpolating the plurality of first seismic traces from the first seismic survey geometry to the second seismic survey geometry; and
mapping the second set of energies comprises interpolating the plurality of second seismic traces from the second seismic survey geometry to the first seismic survey geometry.

6. The method of claim 1 , wherein the method further comprises:
mapping the first set of energies from the second seismic survey geometry to a secondary first seismic survey grid; and
mapping the second set of energies from the first seismic survey geometry to a secondary second seismic survey grid.

7. The method of claim 6 , wherein the secondary first seismic survey grid and the secondary second seismic survey grid comprise an identical grid.

8. The method of claim 1 , wherein:
mapping the first set of energies from the first seismic survey geometry to the second seismic survey geometry further comprises mapping the first set of energies from the first seismic survey geometry to a primary first seismic survey grid; and
mapping the second set of energies from the second seismic survey geometry to the first seismic survey geometry further comprises mapping the second set of energies from the second seismic survey geometry to a primary second seismic survey grid.

9. The method of claim 8 , wherein the primary first seismic survey grid and the primary second seismic survey grid comprise an identical grid.

10. The method of claim 8 , wherein:
mapping the first set of energies from the first seismic survey geometry to the second seismic survey geometry further comprises mapping the first set of energies from the primary first seismic survey grid to the second seismic survey geometry; and
mapping the second set of energies from the second seismic survey geometry to the first seismic survey geometry further comprises mapping the second set of energies from the primary second seismic survey grid to the first seismic survey geometry.

11. A non-transitory computer-readable medium containing computer-executable code that when read by a computer causes the computer to perform a method for multi-vintage energy mapping to observe evolution of a subsurface, the method comprising:
selecting a first seismic survey dataset and a second seismic survey dataset from a plurality of seismic survey datasets acquired over the subsurface, the first seismic survey dataset comprising a set of first energies associated with a first seismic survey geometry and the second seismic survey dataset comprising a set of second energies associated with a second seismic survey geometry;
mapping the first set of energies from the first seismic survey geometry to the second seismic survey geometry;
mapping the second set of energies from the second seismic geometry to the first seismic survey geometry; and
generating an updated first seismic survey dataset by extracting a first common part of the second set of energies and the first set of energies mapped at the second seismic survey geometry, and an updated second seismic survey dataset by extracting a second common part of the second set of energies mapped at the first seismic survey geometry so that energies associated with changes in the subsurface occurring between acquiring the first dataset and acquiring the second dataset are preserved in the updated first and second seismic survey datasets to enable observing evolution of the subsurface.

12. The non-transitory computer-readable medium of claim 11 , wherein:
the first seismic survey and the second seismic survey were obtained at different times; and
physical locations at which energies in the first set of energies and the second set of energies were obtained vary.

13. The non-transitory computer-readable medium of claim 11 , wherein:
the first seismic survey dataset and the second seismic survey dataset pertain to a pair among a plurality of pairs of first and second seismic survey datasets selected from the plurality of seismic survey datasets, each first seismic survey dataset of each pair comprising the set of first energies associated with the first seismic survey geometry and each second seismic survey dataset of the pair comprising the set of second energies associated with the second seismic survey geometry;
mapping the first set of energies comprises mapping the first set of energies from each first seismic survey geometry in a given pair to the second seismic survey geometry of that given pair;
mapping the second set of energies comprises mapping the second set of energies from each second seismic survey geometry in a given pair to the first seismic survey geometry of that given pair; and

Assignees

• Cgg Services Sas

Inventors

• Hoeber Henning
• Khalil Adel

Classifications

• G01V1/308 Primary

  Time lapse or 4D effects, e.g. production related effects to the formation (fluid flow per se E21B47/00) · CPC title

• G01V2210/612

  Previously recorded data, e.g. time-lapse or 4D · CPC title

• G01V2210/61

  Analysis by combining or comparing a seismic data set with other data · CPC title