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US 9,594,174 B2Granted
Computing rotation data using a gradient of translational data
AssigneeWesternGeco L.L.C.
InventorsNicolas Goujon, Pascal Edme, Artem Kashubin, Everhard Johan Muijzert
Life of this patent
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Abstract
Translational data in a first direction is measured by particle motion sensors contained in an elongated housing of a sensor device provided at an earth surface. The particle motion sensors are spaced apart along a second, different direction along a longitudinal axis of the elongated housing. Rotation data around a third direction is computed based at least in part on computing a gradient of the translational data with respect to the second direction.
Claims35
A method of seismic surveying, comprising:
- actuating a seismic source to transmit impulses into an earth subsurface;
- receiving, by a seismic sensor system, translational data in a first direction measured by particle motion sensors contained in an elongated housing of a seismic sensor device provided at a ground surface, wherein at least one of the particle motion sensors is proximate the ground surface, the particle motion sensors spaced apart along a second, different direction along a longitudinal axis of the elongated housing, and receiving translational data in a third direction measured by additional particle motion sensors in the elongated housing, the translational data in the first and third directions corresponding at least partially to the impulses;
- and
- recording the translational data in the first direction and the translational data in the third direction, wherein for the translational data in the first direction and the translational data in the third direction that are measured by the particle motion sensors where at least one of the particle motion sensors is proximate the ground surface, a relationship applies where a rotation data around the third direction is based on a gradient of the translational data in the first direction with respect to the second direction, and a rotation data around the first direction is based on a gradient of the translational data in the third direction with respect to the second direction.
1 more element
An article comprising at least one non-transitory machine-readable storage medium storing instructions that upon execution cause a system to:
- receive translational data in a first direction measured by particle motion sensors contained in an elongated housing of a sensor device provided at a ground surface, wherein at least one of the particle motion sensors is proximate the ground surface, the particle motion sensors spaced apart along a second, different direction along a longitudinal axis of the elongated housing;
- and
- compute rotation data around a third direction that is approximated as a gradient of the translational data with respect to the second direction.
A method of seismic surveying, comprising:
- placing a seismic sensor device at a ground surface, wherein the seismic sensor device comprises an elongated housing, wherein a first seismic sensor is contained inside the elongated housing and is connected with the elongated housing, and a second seismic sensor is contained inside the elongated housing and is connected with the elongated housing, the first and second seismic sensors comprising particle motion sensors, wherein at least one of the first and second seismic sensors is proximate the ground surface, the first seismic sensor and the second seismic sensor being separated from one another by a distance along the elongated body, the first seismic sensor detecting three-axis translational movement, and the second seismic sensor detecting at least two-axis translational movement, the first and second seismic sensors having one axis that is co-axial with one another;
- receiving a first direction translational data;
- and
- receiving a second direction translational data,
- wherein for the first direction translational data and the second direction translational data that are measured by the particle motion sensors where at least one of the particle motion sensors is proximate the ground surface, a relationship applies where a rotation data around the second direction is based on a gradient of the first direction translational data with respect to a longitudinal axis of the elongated housing, and where a rotation data around the first direction is based on a gradient of the second direction translational data with respect to the longitudinal axis.
2 more elements
A method of processing seismic data that is obtained by placing a seismic sensor system at least partially into a ground surface, the seismic sensor system including a processor, the method comprising:
- receiving, by the seismic sensor system, translational data in a first direction measured by particle motion sensors contained in an elongated housing of a sensor device provided at the ground surface, wherein at least one of the particle motion sensors is proximate the ground surface, the particle motion sensors spaced apart along a second, different direction along a longitudinal axis of the elongated housing, and receiving translational data in a third direction measured by additional particle motion sensors in the elongated housing, the translational data in the first and second directions corresponding at least partially to impulses produced by actuation of a seismic source and transmitted into an earth subsurface;
- recording the translational data in the first direction and the translational data in the third direction;
- and
- calculating rotation data around the third direction that is approximated as a gradient of the translational data in the first direction with respect to the second direction.
1 more element
Dependencies are inferred from the claim text.