Marine seismic streamer with increased skin stiffness
View Patent ↗An apparatus includes a streamer having one or more seismic data acquisition devices enclosed within a skin. The skin has a modulus of elasticity of at least 30 MPa to attenuate a flow noise.
1. An apparatus, comprising:
a streamer having seismic data acquisition devices enclosed within a skin, the skin having a modulus of elasticity of at least 30 MPa;
the seismic data acquisition devices comprising a multi-component seismic sensor, the seismic data acquisition devices being supported within a filler material that is supported within and in contact with an inside surface of the skin, wherein the modulus of elasticity of the skin is selected according to the type of filler material to reduce turbulent noise within the streamer.
2. The apparatus of claim 1 , wherein the skin has a modulus of elasticity of between 50-60 MPa.
3. The apparatus of claim 1 , wherein the filler material is a gel-like material.
4. The apparatus of claim 1 , wherein the seismic data acquisition devices include a hydrophone for measuring pressure and three orthogonally-aligned accelerometers to measure three corresponding orthogonal components of particle velocity and/or acceleration.
5. The apparatus of claim 4 , wherein the multi-component sensors are housed within a liquid-filled pocket defined within the filler material.
6. The apparatus of claim 1 , wherein the skin includes one or more longitudinally extending ribs defined thereon.
7. The apparatus of claim 6 , wherein the ribs are defined along an interior surface of the skin.
8. The apparatus of claim 6 , wherein the ribs are defined along an exterior surface of the skin.
9. The apparatus of claim 6 , wherein the ribs are defined along an exterior and interior surface of the skin.
10. The apparatus of claim 9 , wherein the ribs formed along the exterior surface are smaller relative to the ribs formed along the interior surface.
11. The apparatus of claim 9 , wherein the ribs formed along the exterior surface are denser relative to the ribs formed along the interior surface.
12. A seismic spread, comprising:
a streamer for use in seismic data acquisition, the streamer comprising:
a skin having a modulus of elasticity of at least 30 MPa;
a gel filler material supported within the skin;
one or more seismic data acquisition devices enclosed with the gel filler material, the one or more seismic data acquisition devices comprising a multi-component seismic sensor, the modulus of elasticity of the skin being selected according to the type of gel filler material to reduce turbulent noise within the streamer; and
a vessel for towing the streamer.
13. The seismic spread of claim 12 , wherein the modulus of elasticity of the skin varies from an exterior surface of the skin to an interior surface of the skin.
14. The seismic spread of claim 13 , wherein the modulus of elasticity of the skin varies from an exterior surface of the skin to an interior surface of the skin.
15. an apparatus, comprising:
a streamer having one or more seismic data acquisition devices enclosed within a skin, the skin having a modulus of elasticity of at least 30 MPa;
a filler material supported within the skin during use of the streamer; and
the skin having longitudinally extending ribs on an inner surface of the skin, wherein the skin and the ribs of the skin are together an uninterrupted material in a radial direction, the ribs being arranged to facilitate flexing of the skin under pressure in a manner which also dampens pressure waves produced during stretching of the streamer.
16. The apparatus of claim 15 , wherein the acquisition devices are multi-component seismic sensors.
17. The apparatus of claim 16 , wherein the multi-component seismic sensors comprise three orthogonally-aligned accelerometers to measure three corresponding orthogonal components of particle velocity and/or acceleration near the seismic sensor.