4C光纤地震勘探仪器

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Wavelet Comparison of Fibre Optics and MEMS
Hydrophone trace from MEMS station
Inline trace from MEMS station
Hydrophone trace from FO station
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Optoplan 4C System Field Tests
System test in shallow water (50m) in Trondheimsfjorden – January 2006 System test in deep water (300m) at Tjeldbergodden - November 2006 These field tests have verified the excellent performance of the optical seismic sensors and shown that the 4C ocean bottom cable is extremely robust, with exceptional vector fidelity. The fibre optic 4C OBC system will be jointly commercialised by Wavefield Inseis and Optoplan. First commercial full-scale installation is anticipated in 2008.
MEMS Station Hodogram
Horizontal plane hodogram
Fibre Optic Station Hodogram
Horizontal plane hodogram
Vertical-Horizontal plane hodogram
Vertical-Horizontal plane hodogram
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Optoplan History
1985 Optoplan AS spins off from the fiber optic technology group at the Technical University in Trondheim. 1993 Optoplan AS installs first ever fibre optic pressure/temperature gauge in a producing land well – followed in 1996 by first installation in a subsea well. 1998 Optoplan AS enters into agreement with CiDRA in Connecticut, USA to develop optical sensors based on the Fibre Bragg Grating (FBG) Technology for the oil and gas industry. CiDRA acquires 40 % of Optoplan. 2001 Weatherford acquires CiDRA Optical Sensing Systems including the 40 % ownership in Optoplan. Remaining 60 % of Optoplan was acquired in November 2002. 2004 Development project initiated in May with Statoil to develop Ocean Bottom Seismic Cables based on fibre optic technology. Field tests were conducted in 2005 and 2006. 2006 Wavefield Inseis acquire 35% of Optoplan in December and Optoplan enters into agreement with Wavefield Inseis to commercialise the fibre optic ocean bottom cable for permanent 4C4D.
Wavefield InSeis offers the equipment, experience and flexibility to deliver a complete permanent 4C4D project from the initial feasibility stage right through to 4D data delivery.
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Optical Seismic Sensors
The OBC application of the optical sensing technology has so far been developed with co-operation between Statoil and the Weatherford subsidiary Optoplan AS.
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OBC Fibre Optic Seismic Sensor Station
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Complete Permanent 4D Provider
•Feasibility •Pre-project planning and design •FEED study •Equipment provision •Project M百度文库nagement •Installation •4D acquisition and processing
Inline trace from FO station
Equal or better results then the best electrical system on the marked
Crossline trace from MEMS station Vertical trace from MEMS station
Crossline trace from FO station
Vertical trace from FO station
Resampled Fibre Optic data to 1 ms (MEMS data acquired at 1 ms)
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Hodogram Comparison of Optical and MEMS
Similar hodogram response between MEMS and Fibre Optic Station Vector fidelity is excellent for both systems (good hodogram linearity) Ground station coupling is excellent for the buried Fibre Optic and MEMS Cables
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Fibre Optic Permanent 4C4D
The next generation permanent 4C4D system is here! The new Wavefield Inseis OBC system uses optical sensing technology and has been designed to be permanently installed on the sea floor.