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US 9,664,807 B2Granted
Seismic sensor
AssigneeION Geophysical Corporation
InventorsAndre W. Olivier, Matthew Greco, Ronald Barry
Life of this patent
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Abstract
A seismic sensor cable system is provided. The seismic sensor cable system may include a cable, a first sensor configured to measure motion of the cable, wherein measurement of motion by the first sensor substantially excludes particle motion associated with seismic waves, and a second sensor configured to measure particle motion associated with the seismic waves.
Claims25
A seismic sensor cable system, comprising:
- a cable;
- a first sensor configured to measure motion of the cable, wherein the first sensor is coupled to one or more stress members of the cable and decoupled from a skin of the cable to avoid acoustic energy from seismic waves being transferred thereto, wherein measurement of the motion of the cable by the first sensor substantially excludes particle motion associated with the seismic waves;
- and
- a second sensor coupled to the skin of the cable and configured to measure the particle motion associated with the seismic waves, wherein the particle motion is transferred to the second sensor via the skin of the cable, moving in phase thereto.
1 more element
A method for collecting seismic data, comprising:
- determining a first measurement with a first seismic sensor, wherein the first seismic sensor is coupled to one or more stress members of a seismic cable and configured to measure motion of a platform of a seismic sensor system, wherein the first seismic sensor is decoupled from a skin of the cable to avoid acoustic energy from seismic waves being transferred thereto and measurement of the motion of the platform by the first seismic sensor substantially excludes particle motion associated with the seismic waves;
- determining a second measurement from a second seismic sensor coupled to a skin of the seismic cable in a section having a length selected to ensure acoustic mobility, wherein the second seismic sensor moves in phase with the particle motion associated with the seismic waves, and is configured to measure the particle motion thereby;
- and
- combining the first measurement and second measurement to generate a noise-attenuated seismic data signal with attenuated response to the motion of the platform.
1 more element
An ocean bottom seismic sensor system, comprising:
- a noise sensor configured to measure motion;
- a housing configured to substantially insulate the noise sensor from seismic waves from a seismic source, wherein measurement of motion by the noise sensor substantially excludes particle motion associated with the seismic waves;
- a particle motion sensor configured to measure particle motion associated with the seismic waves, wherein the particle motion sensor is coupled to an acoustically mobile suspension system configured to resonate below a predefined lowest frequency of interest of the seismic waves;
- a hydrophone disposed in a housing made of acoustically transparent material;
- and
- a rigid connector joining the housing of the noise sensor and the housing of the hydrophone, wherein the rigid connector is configured to ensure a length of the suspension system.
3 more elements
Dependencies are inferred from the claim text.