Plural-depth buried seismic sensors acquisition system and method
AssigneeCgg Services SAS
InventorsJulien Cotton, Eric Forgues
Life of this patent
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Abstract
A system for collecting seismic data includes plural seismic sensors. The seismic sensors are buried underground. In one application, a first set of seismic sensors are buried at a first depth and a second set of seismic sensors are buried at a second depth. In another application, the sensors alternate along a line, one sensor from the first set and a next sensor from a second set. In still another application, the sensors are randomly distributed below the ground.
Claims8
A seismic data acquisition system for recording seismic waves related to a subsurface to be surveyed, the system comprising:
- plural seismic sensors forming plural lines of sensors when viewed from above ground, the plural seismic sensors located at corresponding depths underground, wherein the depths of individual seismic sensors within each one of the plural lines of sensors are randomly distributed between a minimum depth dmin and a maximum depth dmax,
- wherein the plural seismic sensors are buried underground beneath a weathering layer, and
- the plural seismic sensors are monitoring the subsurface for determining changes in the subsurface.
A method for recording seismic waves related to a subsurface to be surveyed, the method comprising:
- burying plural seismic sensors in a plural lines of sensors when viewed from above ground, the plural seismic sensors located at corresponding depths underground, wherein the depths of individual seismic sensors within each one of the plural lines of sensors are randomly distributed between a minimum depth dmin and a maximum depth dmax, wherein the plural seismic sensors are buried underground beneath a weathering layer;
- recording with the plural seismic sensors seismic waves generated by seismic sources;
- and
- processing the recorded seismic waves to remove a ghost and to generate a final image of the subsurface.
Dependencies are inferred from the claim text.