Acquisition of ultra-long offset seismic data for full waveform inversion during seismic land acquisition
AssigneeWesternGeco L.L.C.
InventorsNicolae Moldoveanu, Maurice Nessim
Life of this patent
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Abstract
A long offset land seismic survey spread includes a plurality of sensors within an area thereby defining a sensor receiver patch, a plurality of long offset sensor receivers outside of the receiver patch thereby surrounding the receiver patch and defining a sensor long offset area that is fee from sensor receivers that also defines a distance separating an external border of the sensor receiver patch and the long offset sensor receivers being a minimum offset distance that is a long offset distance.
Claims20
A method of performing a land seismic survey, comprising:
- placing a plurality of seismic sensor receivers around a perimeter of an area, thereby establishing a seismic sensor receiver patch;
- defining a plurality of seismic source points outside the perimeter, thereby establishing a seismic source patch surrounding the seismic sensor receiver patch;
- and
- placing a plurality of long offset seismic sensors (LONs) outside of the seismic sensor receiver patch and the seismic source patch at a required long offset distance.
A long offset land seismic survey spread, comprising:
- a number of seismic sensor receivers disposed around a perimeter of an area thereby defining a seismic sensor receiver patch;
- a number of seismic sources outside the perimeter thereby surrounding the seismic sensor receiver patch and defining a seismic source patch;
- and
- a number of long offset seismic sensors (LONs) outside of the seismic source patch thereby surrounding the seismic sensor receiver patch and the seismic source patch and defining a long offset sensor area, wherein an area between the long offset sensor area and the seismic sensor receiver patch is free from seismic sensor receivers and defines a long offset distance.
A long offset land seismic survey spread, comprising:
- a number of seismic sensors within an area thereby defining a sensor receiver patch;
- a number of seismic sources within an area thereby defining a source patch;
- and
- a number of long offset seismic sensors (LONs) outside of the source patch thereby surrounding the sensor receiver patch and the source patch and defining a long offset sensor area, wherein an area between the long offset sensor area and the sensor receiver patch is free from seismic sensors and also that defines a long offset distance, wherein the long offset distance is at least 10 kilometers, with no seismic sensor receivers from the sensor receiver patch or one or more of the number of long offset seismic sensors being in the area traversed by and defining the long offset distance.
Dependencies are inferred from the claim text.