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US 10,928,528 B2Granted
Computing rotation data using a gradient of translational data
AssigneeWesternGeco L.L.C.
InventorsNicolas Goujon, Pascal Guillaume Edme, Artem Kashubin, Everhard Johan Muijzert
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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.
Claims19
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 through the earth, including a ground roll, will be transmitted to the elongated housing, wherein the one end of the elongated housing comprises a V shape and wherein one or more wedges are positioned in between the elongated housing and the earth;
- and
- a plurality of sets of particle motion sensors within the elongated housing, wherein the one or more wedges are configured to enhance a coupling of the plurality of the sets of particle motion sensors with the earth, and wherein the plurality of sets of particle motion sensors comprises:
- a first set of particle motion sensors configured to measure a first translational dataset along three orthogonal axes;
- and
- a second set of particle motion sensors configured to measure a second translational dataset along at least two of the three orthogonal axes, wherein a first particle motion sensor of the first set of particle motion sensors and a second particle motion sensor of the second set of particle motion sensors are co-axially located along one of the three orthogonal axes, and wherein the first particle motion sensor and the second particle motion sensor are spaced apart from one another along the one of the three orthogonal axes by a distance in a direction that extends longitudinally along the elongated housing, and
- wherein a processor is configured to:
- receive the first translational dataset along the three orthogonal axes from the first set of particle motion sensors;
- receive the second translational dataset along the at least two of the three orthogonal axes from the second set of particle motion sensors;
- calculate a gradient of translational data received by the plurality of sets of particle motions sensors based on the first translational dataset, the second translational dataset, and the distance;
- and
- calculate rotational data based at least in part on the gradient of translational data.
9 more elements
A method, comprising:
- providing a first set of seismic sensors and a second set of seismic sensors inside an elongated housing, the first set of seismic sensors and the second set of seismic sensors being made up of multi-axis particle motion sensors configured to measure translational data along at least two of three orthogonal axes, wherein a first sensor of the first set of seismic sensors and a second sensor of the second set of seismic sensors are co-axially located along one of the three orthogonal axes, and wherein the first sensor and the second sensor are spaced apart from one another by a distance along the one of the three orthogonal axes in a direction that extends longitudinally along the elongated housing, wherein a first end of the elongated housing comprises a V shape and wherein one or more wedges are positioned in between the elongated housing and an earth, wherein the one or more wedges are configured to enhance couplings of the first set of seismic sensors and the second set of seismic sensors with the earth, and wherein a processor is configured to:
- receive a first translational dataset along the three orthogonal axes from the first set of seismic sensors;
- receive a second translational dataset along the at least two of the three orthogonal axes from the second set of seismic sensors;
- calculate a gradient of translational data based on the first translational dataset, the second translational dataset, and the distance;
- and
- calculate rotational data based at least in part on the gradient of translational data;
- sealing the elongated housing so as to protect the multi-axis particle motion sensors, and
- providing a communication connection to the multi-axis particle motion sensors to communicate signals detected by the multi-axis particle motion sensors.
5 more elements
Dependencies are inferred from the claim text.