Results 241 to 250 of about 49,317 (287)
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The Journal of the Acoustical Society of America, 1986
A hydrophone streamer that includes several arrays of optical fiber pressure sensors. Each array consists of at least three sensors symmetrically disposed around the inside of the streamer skin to form a vertically-disposed array. Each sensor modulates a coherent light beam in accordance with the instantaneous ambient water pressure. The output signals
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A hydrophone streamer that includes several arrays of optical fiber pressure sensors. Each array consists of at least three sensors symmetrically disposed around the inside of the streamer skin to form a vertically-disposed array. Each sensor modulates a coherent light beam in accordance with the instantaneous ambient water pressure. The output signals
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A fiber optic Bragg grating seismic sensor
SPIE Proceedings, 2007Here we present a fiber optic seismic waves sensor based on in-fiber Bragg gratings. Fiber Bragg Grating sensors have been demonstrated to have very high sensitivity to dynamical strain in the sub-micro-strain range and very extended dynamical response from static to very high frequency. The seismic sensing system is based on the integration of three
A. Laudati +10 more
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On the use of a seismic sensor as a seismic source
GEOPHYSICS, 2013We investigated the use of seismic sensors as small seismic sources. A voltage signal is applied to a geophone that forces the mass within the geophone to move. The movement of the mass generates a seismic wavefield that was recorded with an array of geophones operating in the conventional sense.
D.F. Halliday +3 more
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Experience in seismic signal recording using broadband electrochemical seismic sensors
Seismic Instruments, 2010Development and application of broadband seismic sensors, namely velocimeters of electrochemical type (chemotrons), are considered. The principle of operation and design of modern electrochemical (molecular-electronic) converters of seismic signals for linear and rotary motions are described.
D. G. Levchenko +5 more
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Permanent Downhole Seismic Sensors in Flowing Wells
65th EAGE Conference & Exhibition, 2003It is generally accepted that the 'Oilfield of the Future' will incorporate distributed permanent downhole seismic sensors in flowing wells. However the effectiveness of these sensors will be limited by the extent to which seismic signals can be discriminated, or de-coupled, from flow induced acoustic noise originating within the production tubing.
Jaques, P. +4 more
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Imaging Micro–Seismicity Using Surface Sensors
69th EAGE Conference and Exhibition incorporating SPE EUROPEC 2007, 2007A039 Imaging Micro–Seismicity Using Surface Sensors K. Chambers* (University of Bristol) J.M. Kendall (University of Bristol) O. Barkved (BP) S. Brandsbreg-Dahl (BP) & G.A. Jones (University of Bristol) SUMMARY We outline an imaging procedure for micro-seismic events recorded on seismic arrays.
K. Chambers +4 more
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Sensor technology for microhole seismic applications
SEG Technical Program Expanded Abstracts 1995, 1995Los Alamos engineering, laboratory and field studies are exploring the integration of drilling and instrumentation requirements for the most economic means for deployment of borehole seismic sensors. The minimum hole-diameter requirement for the installation of borehole seismic sensors and associated electronics, is compatible with holes of greatly ...
J. N. Albright, D. S. Dreesen
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Imaging Seismic Tomography in Sensor Network
2013 IEEE International Conference on Distributed Computing in Sensor Systems, 2013Tomography imaging, applied to seismology, requires a new, decentralized approach if high resolution calculations are to be performed in a sensor network configuration. The real-time data retrieval from a network of large-amount wireless seismic nodes to a central server is virtually impossible due to the sheer data amount and resource limitations.
Lei Shi +6 more
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A MEMS based electrochemical seismic sensor
2013 Transducers & Eurosensors XXVII: The 17th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS & EUROSENSORS XXVII), 2013This paper presents a micro-electro-mechanical system (MEMS) based electrochemical seismic sensor where insulating spacers and sensing electrodes were contained in a plexiglass tube filled with an ion-rich electrolyte solution. Sensing electrodes and insulation spacers were fabricated based on MEMS processes and assembled by adhesive bonding in a layer-
T. Deng +5 more
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A 5C Land Seismic Gradient Sensor
81st EAGE Conference and Exhibition 2019, 2019Summary We developed, built, and field tested a five-component land seismic sensor whose data facilitates attenuation of spatially aliased ground roll. The sensor records the three components of particle motion and the two vertical gradients of the horizontal wavefields that, at the free surface, are equal to the horizontal gradients of the vertical ...
E. Muijzert +4 more
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