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US 10,591,622 B2Granted
Reconfigurable seismic sensor cable
AssigneePGS Geophysical AS
InventorsRobertus Franciscus Hegge, Roald G. van Borselen
Life of this patent
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Abstract
Embodiments relate to a sensor cable that may be reconfigurable to have various combinations of seismic sensors. An apparatus may comprise a sensor cable and seismic sensors distributed throughout a volume of the sensor cable and along all three axes of the sensor cable, wherein the seismic sensors are assigned to sampling groups that are reconfigurable and not hardwired.
Claims25
A system, comprising:
- a sensor cable;
- seismic sensors distributed throughout a volume of the sensor cable and along all three axes of the sensor cable, wherein the seismic sensors are spaced regularly or irregularly on two or more sensor strips, wherein the seismic sensors are assigned to sampling groups that are reconfigurable and not hardwired, wherein the seismic sensors are distributed throughout the volume of the sensor cable, wherein the two or more sensor strips are arranged along the sensor cable in helical patterns;
- and
- a computer system configured to:
- determine directional derivatives in all three axes of the sensor cable using contributions from two or more of the seismic sensors that are not located in line with a direction of the directional derivatives, wherein the two or more of the seismic sensors are distributed in the sensor cable at different x-, y-, and/or z-positions, wherein the directional derivatives are determined from finite difference calculations by using weights based on projected distances along and perpendicular to a particular direction;
- reconfigure the sampling groups;
- and
- if one of the seismic sensors fails, then reweight the contributions of adjacent seismic sensors to compensate for the failure.
5 more elements
An apparatus, comprising:
- a sensor cable;
- seismic sensors distributed throughout a volume of the sensor cable and at different positions along all three axes of the sensor cable, wherein at least one of the seismic sensors is a film-based sensor, wherein the film-based sensor comprises a film, the film comprising a viscoelastic polymer and a piezoelectric ceramic, wherein at least one of the seismic sensors further comprises an upper conductive layer and a lower conductive layer, the upper conductive layer and the lower conductive layer being on opposing sides of the film, and wherein the at least one of the seismic sensors further comprises a protective coating disposed on the upper conductive layer, and wherein the film, the upper conductive layer, and the lower conductive layer are coated on a protective sheet;
- and
- two or more sensor strips comprising more than one of the seismic sensors disposed on a flexible substrate of the two or more sensor strips, wherein the seismic sensors are spaced regularly or irregularly on the two or more sensor strips, wherein the two or more sensor strips are wrapped around or weaved throughout at least a portion of the sensor cable in a helical pattern.
1 more element
A method comprising:
- obtaining geophysical data;
- processing the geophysical data to generate a geophysical data product, wherein the geophysical data is obtained using seismic sensors distributed throughout a volume of a sensor cable and along all three axes of the sensor cable, wherein the seismic sensors are assigned to sampling groups that are reconfigurable and not hardwired, wherein the seismic sensors are spaced regularly or irregularly on two or more sensor strips and the two or more sensor strips are wrapped around or weaved throughout at least a portion of the sensor cable in a helical pattern;
- determining directional derivatives, with a computer system, in all three axes of the sensor cable using contributions from two or more of the two or more seismic sensors that are not located in line with a direction of the directional derivatives, wherein the two or more of the seismic sensors are distributed in the sensor cable at different x-, y, and/or z-positions, wherein the directional derivatives are determined from finite difference calculations by using weights based on projected distances along and perpendicular to a particular direction;
- reconfiguring the sampling groups;
- and
- if one of the seismic sensors fail, then reweighting the contributions of adjacent seismic sensors to compensate for the failure.
3 more elements
A method comprising:
- actuating one or more seismic sources in a body of water in conjunction with a marine seismic survey;
- and
- detecting acoustic energy originating from the one or more seismic sources using seismic sensors distributed throughout a volume of a sensor cable and at different positions along all three axes of the sensor cable, wherein the seismic sensors are spaced regularly or irregularly on two or more sensor strips, wherein at least one of the seismic sensors is a film-based sensor, wherein the film-based sensor comprises a film, the film comprising a viscoelastic polymer and a piezoelectric ceramic, wherein more than one of the film-based sensor is disposed on the two or more sensor strips, the two or more sensor strips comprising a flexible substrate on which the more than one of the film-based sensor is disposed, wherein the two or more sensor strips are wrapped around or weaved in a helical pattern throughout at least a portion the sensor cable.
Dependencies are inferred from the claim text.