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Keywords: wavelength
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Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 2015
Paper Number: OTC-25778-MS
... the results of the different cases measured and analyzed. Optical Fiber Bragg Grating Sensors Over the last few years, Fiber Bragg Gratings (FBGs) have been used extensively in the telecommuni- cation industry for dense wavelength division de-multiplexing, dispersion compensation, laser stabiliza...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2013
Paper Number: OTC-23947-MS
..., high-resolution spectrometers that are capable of covering the 0.2 um to >10um wavelength range. Their small size ASPIC spectrometers will also impact the size of the DFA tool and may lead to novel deployment strategies. Photonic Sensor Systems A generic photonic sensor system can be divided into three...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 30–May 3, 2012
Paper Number: OTC-23342-MS
... celerity intrinsic wave period kinematic reduction factor wave length surface elevation sname logarithmic profile wavelength wave component platform design assessment upstream oil & gas subsea system wind speed elevation OTC 0H23342 Environmental Actions in the New ISO for the Site...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2011
Paper Number: OTC-21695-MS
... illustrated in Figure 1. Excitation light is directed to a sample at a wavelength, EX. The aromatic molecules in the sample absorb the excitation light and jump from their normal energy level (E0, ground state) to an excited energy state, E2. The excited molecules then lose some of their absorbed energy by a...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 5–8, 2008
Paper Number: OTC-19678-MS
... fibres, whilst minimising the size and complexity of the array and associated platform-mounted opto-electronic interrogation systems. A comparative study of alternative optical system architectures is presented, and a preferred approach based on the combination of time and wavelength division...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 2006
Paper Number: OTC-18121-MS
... oil & gas optical fiber wavelength i-conn connection system fbg assembly application Copyright 2006, Offshore Technology Conference This paper was prepared for presentation at the 2006 Offshore Technology Conference held in Houston, Texas, U.S.A., 1 4 May 2006. This paper was selected for...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 2006
Paper Number: OTC-18140-MS
... surface at periodic intervals. As the light pulses strike imperfections in the fiber, some light is scattered and reflected back towards the source (Rayleigh scattering), and some light excites the molecules at the imperfection. These excited molecules scatter light at wavelengths above and below the...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 2006
Paper Number: OTC-17929-MS
... illuminating wavefield otc 17929 wavelength wavefield subseafloor depth upstream oil & gas resolution horizontal array seafloor sensor geology detailed imaging reservoir characterization offshore technology conference p-sv data multicomponent seismic data seafloor seismic...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2005
Paper Number: OTC-17376-MS
... flow assurance offshore technology conference paraffin deposition hydrate deposition wavelength detection sensor production logging real time system upstream oil & gas fiber optic sensor production control valve heat flux pipeline production monitoring insulation...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 3–6, 2004
Paper Number: OTC-16423-MS
... type, the temperature resolution falls off. Bragg Grating (Ref 5,6). A Bragg Grating Sensor (see Figure 5) operates by reflecting a specific wavelength of light from a section of optical fiber that has been encoded with an optical grating. The pitch of the grating defines the reflected wavelength, as...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 30–May 3, 2001
Paper Number: OTC-13201-MS
... diameter in the order of 1 mm. A small groove is made in the armour wire, and the packaged sensors are placed in the groove. armour wire strain level riser tensile armour wire sensor groove fibre bragg upstream oil & gas sensor tube end fitting strain sensor wavelength optical...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 1998
Paper Number: OTC-8884-MS
... wavelength current sensor otc 8884 fbg resolution application offshore technology conference vibration sensor subsea system condition monitoring frequency interferometer upstream oil & gas subsea production equipment sensor bragg information jackson sensor network fibre...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 1998
Paper Number: OTC-8842-MS
... sensor transducer optical fiber production monitoring reservoir surveillance upstream oil & gas wavelength optical reservoir instrumentation system OTe 8842 Optical Reservoir Instrumentation System Alan D. Kersey, James R. Dunphy and Arthur D. Hay CiDRA Corporation, 15 Sterling Drive...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 5–8, 1997
Paper Number: OTC-8326-MS
... phase velocity of the Scholte wave, VSc is found from: Vsc =1(3:0) d (I) where I is frequency, ¢ is the phase difference at that frequency, and d is the spacing between receivers. The resulting phase velocities are plotted against wavelength (or frequency) to create a dispersion curve as il1ustrated Fig...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 1996
Paper Number: OTC-7956-MS
... cross-plot of apparent seismic wavelength at each trace in real and model data shows a similar response. The model shows a rapid increase in apparent wavelength when the lower FM 131 reservoir is 25 meters thick. This closely matches the real data response, where a sharp increase in apparent wavelength...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 1995
Paper Number: OTC-7818-MS
... around the pipe, z = zI x = xIL, ~ = ~ TW&* and L is the wavelength of the ocean wave. After rearranging, solutions of maximum amplitude can be written as a finction of these groups: where T. is the resonant frequency of a pipe con- sidered to be infinitely long calculated from where /( ) 2/3 3g2T S...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 3–6, 1993
Paper Number: OTC-7112-MS
.... In general, the solution is dependent on the ratio of wavelength to water depth; however, in this paper we confine ourselves to deepwater conditions where the results are unaffected by this ratio. The first-mode solution to the wave equation is an Airy-type gravity-driven wave which travels along...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 1992
Paper Number: OTC-6852-MS
... upstream oil & gas normalized velocity water depth equation interface shear wave velocity compression wave velocity seafloor wave velocity gas hydrate minimum-energy acoustic wave wavelength propagate scholte wave surface wave velocity reservoir characterization dispersion...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 1991
Paper Number: OTC-6535-MS
... presented. ABSTRACT Analytical and experimental studies of the Spectral-Analysis- of-Surface-Wave (SASW) technique for offshore geotechnical investigations are presented. Effects of water depth, wavelength and gravity on soil-water interface waves are examined; appropriate wavelengths for SASW testing are...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 7–10, 1990
Paper Number: OTC-6234-MS
... velocity with wavelength (or frequency). Dispersion arises because surface waves of different wavelengths sample different depths in a material profile as illustrated in Fig. 1. As wavelength increases, particle motion extends to greater depths in the profile. The velocities of surface waves are...

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