Compressive sensing marine streamer system
Embodiments included herein are directed towards a marine seismic streamer. The seismic streamer may include an outer skin formed in longitudinally extending tubular shape, an inner surface of the outer skin defining an internal volume containing a gel substance. The seismic streamer may also include a plurality of micro-electro-mechanical (“MEMS”) sensors and plurality of hydrophones associated with the outer skin, wherein in the plurality of MEMS sensors are spaced non-uniformly in the seismic streamer along an axial direction of the streamer, such that not more than 100 MEMS sensors are located in the seismic streamer over a continuous 100 meter axial length of seismic streamer. The seismic streamer may further include an electronics system extending axially through an inside portion of the outer skin and a strength member core extending axially through an inside portion of the outer skin.
1 . A marine seismic streamer comprising a plurality of particle motion sensors and a plurality of hydrophones:
wherein a first subset of the particle motion sensors is uniformly spaced along the streamer at a spacing that satisfies the Nyquist interval for seismic signals, and
wherein the remaining particle motion sensors in a second subset are non-uniformly spaced along the streamer so that the average spacing of the particle motion sensors in the first and second subsets is above the Nyquist interval for a specific noise mode present on the streamer, so that the particle motion sensors support compressive sensing of the noise mode, wherein the specific noise mode has a phase velocity slower than the phase velocities of other noise modes present on the streamer.
2 . The marine seismic streamer of claim 1 where the noise mode is a transverse noise mode.
3 . The marine seismic streamer of claim 1 where the noise mode is a longitudinal noise mode.
4 . The marine seismic streamer of claim 1 where the noise mode is a torsional noise mode.
5 . The marine seismic streamer of claim 1 where the streamer is a gel-filled streamer.
6 . The marine seismic streamer of claim 1 where the streamer is a solid streamer.
7 . The marine seismic streamer of claim 1 where the plurality of hydrophones is collocated with the first subset of particle motion sensors.
8 . The marine seismic streamer of claim 1 where the particle motion sensors are accelerometers.
9 . The marine seismic streamer of claim 8 where the accelerometers are MEMS accelerometers.
10 . A method for performing a marine seismic survey comprising: towing a marine seismic streamer having a plurality of particle motion sensors and a plurality of hydrophones,
wherein a first subset of the particle motion sensors is uniformly spaced along the streamer at a spacing that satisfies the Nyquist interval for seismic signals, and
wherein the remaining particle motion sensors in a second subset are non-uniformly spaced along the streamer so that the average spacing of the particle motion sensors in the first and second subsets is above the Nyquist interval for a specific noise mode present on the streamer, so that the particle motion sensors support compressive sensing of the noise mode; and
using the plurality of particle motion sensors and the plurality of hydrophones to acquire seismic data including signal and noise, wherein the specific noise mode has a phase velocity slower than the phase velocities of other noise modes present on the streamer.
11 . The method of claim 10 where the noise mode is a transverse noise mode.
12 . The method of claim 10 where the noise mode is a longitudinal noise mode.
13 . The method of claim 10 where the noise mode is a torsional noise mode.
14 . The method of claim 10 where the streamer is a gel-filled streamer.
15 . The method of claim 10 where the streamer is a solid streamer.
16 . The method of claim 10 where the plurality of hydrophones is collocated with the first subset of particle motion sensors.
17 . The method of claim 10 where the particle motion sensors are accelerometers.
18 . The method of claim 17 where the accelerometers are MEMS accelerometers.