Ocean bottom seismic sensing system
First Claim
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1. An array of ocean bottom seismic sensor stations, comprising:
- at least one array connection module;
a plurality of array cables extending from the array connection module, each array cable including a series of array cable modules and a multi-fiber lead cable, each array cable module including a series of seismic sensor stations suitable for deployment at or below the ocean bottom floor and connected by multi-fiber lead cables, each station housing a plurality of optical sensors, all stations within the same array cable module sharing a common sensor fiber; and
for each array cable module, a module connection node to couple a different one or more fibers of the lead cable to a sensor fiber used to interrogate a series of corresponding seismic sensor stations.
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Abstract
Seismic sensor systems and sensor station topologies, as well as corresponding cable and sensor station components, manufacturing and deployment techniques are provided. For some embodiments, networks of optical ocean bottom seismic (OBS) stations are provided, in which sensor stations are efficiently deployed in a modular fashion as series of array cable modules deployed along a multi-fiber cable.
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Citations
29 Claims
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1. An array of ocean bottom seismic sensor stations, comprising:
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at least one array connection module; a plurality of array cables extending from the array connection module, each array cable including a series of array cable modules and a multi-fiber lead cable, each array cable module including a series of seismic sensor stations suitable for deployment at or below the ocean bottom floor and connected by multi-fiber lead cables, each station housing a plurality of optical sensors, all stations within the same array cable module sharing a common sensor fiber; and for each array cable module, a module connection node to couple a different one or more fibers of the lead cable to a sensor fiber used to interrogate a series of corresponding seismic sensor stations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A sensing system, comprising:
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at least one array connection module; a plurality of array cables extending from the array connection module, each array cable including a series of array cable modules and a multi-fiber lead cable, each array cable module including one or more series of sensor stations connected by multi-fiber lead cables, each station housing a plurality of optical sensors sharing a common wavelength, the common wavelength being different for each station in a same series, all stations within the same array cable module sharing a common sensor fiber; and for each array cable module, a module connection node to couple a different one or more fibers of the lead cable to a sensor fiber used to interrogate a series of corresponding seismic sensor stations; and instrumentation coupled to the series of sensor stations and configured to interrogate sensors housed in each station using time division multiplexing (TDM) and to interrogate sensors housed in different sensor stations in each series using wavelength division multiplexing (WDM). - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. An array of seismic sensor stations, comprising:
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at least one array connection module; a plurality of array cables extending from the array connection module, each array cable including a series of array cable modules and a multi-fiber lead cable, each array cable module including a series of seismic sensor stations connected by multi-fiber lead cables, each station housing a plurality of optical sensors, all stations within the same array cable module sharing a common sensor fiber; and for each array cable module, a module connection node to couple a different one or more of fibers of the lead cable to a sensor fiber used to interrogate a series of corresponding seismic sensor stations. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29)
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Specification