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Keywords: hydrophone
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Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 2009
Paper Number: OTC-20250-MS
... Ac ce le ra tio n G 's Series1 Figure 2 Sparker Borehole Simulator The sparker was suspended at different heights above the bottom of the hole in two feet of fresh tap water. The purpose of the testing was to demonstrate that the sparker energy was in agreement with both (a) a calibrated hydrophone...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 5–8, 2008
Paper Number: OTC-19391-MS
... and hydrophones, fiber Bragg grating (FBG) based sensor network and an electro-optic interrogation and read-out system for the sensors. The sensors, fiber network, in-sea components and the topside instrumentation system have been subjected to significant qualification programs. The results of analysis...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 5–8, 2008
Paper Number: OTC-19445-MS
... reservoir characterization deployment sensor otc 19445 cable conventional geophone upstream oil & gas sensor station hydrophone permanent reservoir offshore technology conference optical sensor petroleum geo-services optoelectronic system seabed cable frequency response brett bunn...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 30–May 3, 2007
Paper Number: OTC-18992-MS
... gathers are natural for OBS. These provide better illumination and are suitable for 3D Wave Equation Migration (WEM). Better illumination and WEM enable improved imaging of complex structures under complex overburden such as salt. The P waves are recorded on both the hydrophone and the geophones...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 5–8, 2003
Paper Number: OTC-15076-MS
... is based on pressure compensated flexural discs; this results in no change in the sensitivity or frequency response of the hydrophone from the sea surface to 6000 m depth. The second instrument is a broad bandwidth, high output, deep-water acoustic source, which can be used at ocean depths to 6000 m...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 5–8, 2003
Paper Number: OTC-15390-MS
... Abstract There is interest in using vertical arrays of hydrophones to monitor near-sea-floor gas hydrates over extended periods of time. The technology is being developed to use nets of such arrays to track ships and use the sounds from them to image shallow geologic features. It is expected...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2002
Paper Number: OTC-14110-MS
... Traditional marine seismic acquisition, using streamers of hydrophones, only records the pressure field at the receivers. Ocean bottom seismic acquisition, on the other hand, typically uses four component sensors in order to record the full wavefield at the receivers. While this provides moreinformation about...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2002
Paper Number: OTC-14112-MS
... wavefields during processing of 3D converted-wave (PS-wave) surveys, particularly for the horizontal components. Since hydrophones are perfectly coupled to the fluid medium, their response is an optimal reference of true compressional-wave (P-wave) reflectivity. Operators can be designed from common-receiver...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 2000
Paper Number: OTC-11982-MS
..., fivepairs of cables were laid giving a seabed footprint of 36 sq.km. The cablesystem uses array's of hydrophones with 3 orthogonal velocity sensors. In processing, the hydrophone and vertical velocity sensor are summed togive an improved result. The horizontal velocity components are rotated intoradial...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 2000
Paper Number: OTC-11931-MS
... systems because of advantages of power, performance and reliability over conventional electronics. Results from a field test of a fiber optic seismic borehole receiver prototype demonstrate that a multi-level, fiber optic hydrophone system can improve the economics of Vertical Seismic Profiling (VSP...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 3–6, 1999
Paper Number: OTC-10986-MS
... with vertical hydrophone cables proved successful, but were ruled impractical (A practical and efficient employment of the vertical hydrophone cable has since emerged). It was obvious that at least two measurements were required - geophones and hydrophones were chosen as a practical method. Thus the industry...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 1998
Paper Number: OTC-8820-MS
... to different datasets for separated migration did not result much difference in the final image. The general results have been showing that vertical cable technique is an excellent tool to obtain depth image of complex geologic structures. The power of stacking migrated images of different hydrophones...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 5–8, 1997
Paper Number: OTC-8314-MS
... Conference held In component (3C geophone + hydrophone) techniques are being Houston. Texas, 5-8 May 1997. developed and tested with very encouraging results. This paper was selected for presentation by the OTC Program Committee following review of information contained in an abstract submitted by the author...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 5–8, 1997
Paper Number: OTC-8315-MS
.... The post-stack migration places heavy emphsis on the zero range coverage and suffers proportionately when it is missing. Vertical Cable Acquisition Lets see what happens when reflected seismic waves are recorded by a set of vertical hydrophone cables deployed in an area over an exploration prospect. In Fig...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 5–8, 1997
Paper Number: OTC-8316-MS
... Coupling The second of the most often asked questions about the Dual-Sensor OBC method is "What is the quality of the geophone coupling with the method The Dual-Sensor unit contains both a hydrophone and a gimbaled geophone. Its mass is about 2.4 Kg, about 14 times that of a land geophone...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 1995
Paper Number: OTC-7655-MS
... from the primary input in some fashion. An ANC is based on the premise that the secondary input, when convolved with some digital filter. otc 7655 noise cancellation interference hydrophone frequency equation geophone trace shot record geophysical application upstream oil & gas...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 1991
Paper Number: OTC-6559-MS
... with an uneven seabed. One hydrophone is positioned directly beneath each of the sixteen acoustic sources. A hydrophone positioning system rotates four addi tional. hydrophones, located on an extended beam, about a central sleeve bearing. The acoustic data is transmitted through a hydrophone networking system...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 1989
Paper Number: OTC-6024-MS
... survey direct arrival vibration downhole energy source hydrophone upstream oil &amp; gas vsp drill-bit vsp data instrumentation drill bit vsp survey receiver tomex survey pilot signal geophone drilling energy source vsp data aTC 6024 MWD VSP and Checl<shot Surveys Using the Drill Bit...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 1989
Paper Number: OTC-5947-MS
... otc 5947 transmission application subsea system satellite well battery pack autonomous subsea control system platform limitation control pod autonomous control system subsea production equipment upstream oil &amp; gas valve accumulator electronics hydrophone control system...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 1988
Paper Number: OTC-5866-MS
...OTC 5866 A Unique High-Resolution Seismic Reflection System Using an Electromagnetic Source and a Surface Reflection Canceling Hydrophone by R.E. Sylwester, Williamson & Assocs. Inc., and C.R.B. Lister, U. of Washington Copyright 1988 Offshore Technology Conference This paper was presented...

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