Seismic image enhancement

Patent metadata

Field	Value
Publication number	US-9217802-B2
Application number	US-201213435845-A
Country	US
Kind code	B2
Filing date	Mar 30, 2012
Priority date	Apr 5, 2011
Publication date	Dec 22, 2015
Grant date	Dec 22, 2015

Abstract

A method can include accessing seismic data; providing a wave function that defines, at least in part, a correlation window length; generating local autocorrelation functions for the seismic data using the correlation window length; performing cross-correlations between the wave function and each of the local autocorrelation functions to provide local cross-correlation coefficient values; determining second derivatives of the local cross-correlation coefficient values to provide local second derivative values; and rendering the local second derivative values to a display. Various other apparatuses, systems, methods, etc., are also disclosed.

First claim

The invention claimed is:

1. A method comprising:
accessing seismic data; and
enhancing the seismic data for identification of at least one horizon of a geologic environment by
providing a wave function that defines, at least in part, a correlation window length;
generating local autocorrelation functions for the seismic data using the correlation window length;
performing cross-correlations between the wave function and each of the local autocorrelation functions to provide local cross-correlation coefficient values;
determining second derivatives of the local cross-correlation coefficient values to provide local second derivative values; and
rendering the local second derivative values to a display.

2. The method of claim 1 wherein the accessing seismic data comprises accessing seismic data as amplitude versus time or depth and a spatial dimension.

3. The method of claim 1 wherein the rendering the local second derivative values to a display comprises rendering the local second derivative values versus time or depth and a spatial dimension.

4. The method of claim 1 further comprising identifying at least one horizon based on the rendering of the local second derivative values to the display.

5. The method of claim 1 wherein the providing a wave function comprises providing a cosine function for a single frequency.

6. The method of claim 5 further comprising repeating the method wherein the providing a cosine function for a single frequency comprises, for each repetition of the method, providing a cosine function for a different single frequency.

7. The method of claim 1 further comprising rendering a graphical user interface to the display wherein the graphical user interface comprises a graphical control for input of a frequency for the wave function.

8. The method of claim 1 further comprising rendering a graphical user interface to the display wherein the graphical user interface comprises a graphical control for selection of an attribute that effectuates at least the performing cross-correlations.

9. The method of claim 1 further comprising rendering a graphical user interface to the display wherein the graphical user interface comprises a graphical control for selection of an attribute that effectuates at least the performing cross-correlations and the determining second derivatives.

10. One or more non-transitory computer-readable media comprising computer-executable instructions to instruct a computing system to:
access seismic data from a storage device and, to enhance the seismic data for identification of at least one horizon of a geologic environment,
receive at least one parameter to define a wave function that determines, at least in part, a correlation window length;
generate local autocorrelation functions for the seismic data using the correlation window length;
perform cross-correlations between the wave function and each of the local autocorrelation functions to provide local cross-correlation coefficient values;
determine second derivatives of the local cross-correlation coefficient values to provide local second derivative values; and
store the local second derivative values to a storage device.

11. The one or more non-transitory computer-readable media of claim 10 further comprising computer-executable instructions to instruct a computer system to render a graphical user interface to a display for display of a selectable attribute to instruct the computer system to execute the instructions to perform cross-correlations and to execute the instructions to determine second derivatives.

12. The one or more non-transitory computer-readable media of claim 10 wherein the computer-executable instructions to instruct a computer system to receive at least one parameter comprises instructions to receive a frequency for the wave function.

13. The one or more non-transitory computer-readable media of claim 10 further comprising computer-executable instructions to instruct a computer system to render the local second derivative values to a display.

14. The one or more non-transitory computer-readable media of claim 13 wherein the computer-executable instructions to instruct a computer system to render the local second derivative values to a display comprise computer-executable instructions to render the second derivative values to the display using a color scheme.

15. A system comprising:
one or more processors;
memory;
a network interface;
a display interface; and
processor-executable instructions stored in the memory to
receive seismic data via the network interface and, to enhance the seismic data for identification of at least one horizon of a geologic environment,
generate local autocorrelation functions for the seismic data using a correlation window length,
perform cross-correlations between a wave function and each of the local autocorrelation functions to provide local cross-correlation coefficient values,
determine second derivatives of the local cross-correlation coefficient values to provide local second derivative values, and
transmit signals via the display interface to render the local second derivative values to a display.

16. The system of claim 15 wherein the wave function comprises a cosine function.

17. The system of claim 15 wherein the wave function comprises a wave function characterized by a single frequency.

18. The system of claim 15 wherein the seismic data comprises seismic data as amplitude versus time or depth and a spatial dimension.

19. The system of claim 15 wherein the signals to render the local second derivative values to a display comprises signals to render the local second derivative values versus time or depth and a spatial dimension.

20. The system of claim 15 further comprising processor-executable instructions stored in the memory to pick a horizon responsive to receipt of an input command during rendering of the local second derivative values to a display.

Assignees

• Muhl Saul Antonio Trujillo
• Schlumberger Technology Corp

Inventors

• Muhl Saul Antonio Trujillo

Classifications

• G01V1/325 Primary

  Transforming one representation into another · CPC title

• G01V1/366

  by correlation of seismic signals · CPC title

• G01V1/307

  for determining seismic attributes, e.g. amplitude, instantaneous phase or frequency, reflection strength or polarity · CPC title