Seismic acquisition system and technique

Patent metadata

Field	Value
Publication number	US-9304216-B2
Application number	US-36644909-A
Country	US
Kind code	B2
Filing date	Feb 5, 2009
Priority date	Feb 5, 2009
Publication date	Apr 5, 2016
Grant date	Apr 5, 2016

Abstract

An apparatus includes an array of seismic sensor units that are adapted to acquire measurements in connection with a land surface-based seismic survey. Each seismic sensor unit includes a particle motion sensor and a rotation sensor.

First claim

What is claimed is:

1. A method comprising:
receiving particle motion data acquired in measurements by particle motion sensors of a particle motion sensor array and rotation rate data acquired in measurements by rotation rate sensors of a rotation rate sensor array;
characterizing a wavefield based at least in part on the particle motion data;
characterizing a gradient of the wavefield based at least in part on the rotation rate data; and
processing the particle motion and rotation rate data in a processor-based machine based at least in part on the characterization of the wavefield and the characterization of the gradient of the wavefield to construct a subsurface image.

2. The method of claim 1 , wherein the processing comprises:
attenuating at least one of a ground roll and an airwave.

3. The method of claim 1 , wherein the processing comprises interpolating the wavefield at positions other than positions at which the particle motion and rotation rate data were acquired.

4. The method of claim 1 , wherein the processing comprises applying an anti-aliasing filter.

5. The method of claim 1 , wherein the processing comprises separating compression and shear wavefields.

6. A system comprising:
an interface to receive particle motion data acquired in measurements by particle motion sensors of a particle motion sensor array and rotation rate data acquired in measurements by rotation rate sensors of a rotation rate sensor array; and
a processor to:
characterize a wavefield based at least in part on in part on the particle motion data;
characterize a gradient of the wavefield based at least in part on the rotation rate data; and
process the particle motion data and the rotation rate data to determine a subsurface image based at least in part on the characterization of the wavefield and the characterization of the gradient of the wavefield.

7. The system of claim 6 , wherein the processor attenuates at least one of a ground roll and an airwave.

8. The system of claim 7 , wherein the processor interpolates the wavefield at positions other than positions at which the particle motion and rotation rate data where sampled.

9. The system of claim 7 , wherein the processor applies an anti-aliasing filter.

10. The system of claim 6 , wherein the processor uses the particle motion and rotation rate data to separate compression and shear wavefields.

Assignees

• Muijzert Everhard Johan
• Westerngeco Llc

Inventors

• Muijzert Everhard Johan

Classifications

• G01V1/34

  Displaying seismic recordings {or visualisation of seismic data or attributes} · CPC title

• G01V1/20 Primary

  Arrangements of receiving elements, e.g. geophone pattern · CPC title

• G01V1/301

  for determining seismic cross-sections or geostructures · CPC title

• G01V2210/57

  Trace interpolation or extrapolation, e.g. for virtual receiver; Anti-aliasing for missing receivers · CPC title

• G01V1/36

  Effecting static or dynamic corrections on records, e.g. correcting spread; Correlating seismic signals; Eliminating effects of unwanted energy · CPC title