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US 2017/0146673 A1Published application
Computing Rotation Data Using A Gradient of Translational Data
AssigneeWesternGeco L.L.C.
InventorsNicolas Goujon, Pascal Guillaume 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.
Claims14
A seismic sensor device comprising:
- an elongated housing having a longitudinal axis and one end that is adapted to be input into an earth to form a connection between the earth and the elongated housing so that seismic signals transmitted though the earth, including ground roll, will be transmitted to the elongated housing;
- and
- particle motion sensors within the elongated housing, a first of the particle motion sensors to measure translational data along three orthogonal axes and a second of the particle motion sensors to measure translational data along at least two orthogonal axes, the particle motion sensors configured so that the particle motion sensors are co-axial along one of the three axes and spaced apart from one another along the co-axial axis.
A method of manufacturing a seismic sensor, comprising:
- providing a first seismic sensor and a second seismic sensor inside an elongated tubular housing, the first seismic sensor and the second seismic sensor being made up of multi-axis particle motion sensing devices,
- sealing the housing so as to protect the particle motion sensors, and
- providing a communication connection to the particle motion sensors to communicate signals detected by the particle motion sensors.
Dependencies are inferred from the claim text.