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OBI-40 Ver.2.0
ABI-40
Brochure (PDF)
Optical
Televiewer Borehole Probe
Applications:
The purpose of the optical imaging tool is to provide detailed, oriented, structural information when the
acoustic cannot be operated (air or clean water filled boreholes).
The OBI-40 generates a continuous oriented 360° image of the borehole wall unwrapped using an optical imaging system.
(downhole CCD camera which views a reflection of the borehole wall in a conic mirror). The tool includes a full orientation device consisting of a precision 3 axis magnetometer and 3 accelerometers thus allowing for both accurate borehole deviation data to be obtained during the same logging run, and for accurate and precise orientation of the image.
The optical televiewer is fully downhole
digital and can be run on any standard winches (mono, 4 conductors, 7
conductors). It is directly compatible with our acquisition system using
acquisition and processing software (MGX II and
WellCAD). Resolution is
user definable (up to 0.375mm Vertical resolution and 720 pixels
Azimuthal resolution)
Logging conditions
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Hole diameter:
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45 mm to 300 mm maximum
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Logging mode:
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depth or time sampled
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Log parameters:
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360° RGB optical image, Borehole azimuth and dip
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Technical specifications
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Tool max OD:
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40mm
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Tool length:
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1.7 m
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Weight:
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7 Kgs (15.4 lbs)
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Pressure rating:
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maximum 200 bars
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Temperature rating:
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50°C
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Optical subsystem:
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downhole A/D conversion
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Image digitizing:
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24 bit RGB value / 16 bits 4.2.2 video
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Azimuthal resolution:
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user definable 90/180/360 or 720 pixels /360°
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Vertical resolution:
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user definable. Est. @ 0.375 mm with MGX winch
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Colour Resolution:
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24 bit RGB value
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White Balance:
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automatic or user adjustable
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Aperture & Shutter:
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automatic or user adjustable
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Special Functions:
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User configurable real time digital edge
enhancing
User configurable ultra low light condition
mode
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Sensor type:
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Downhole DSP based digital CCD camera
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Orientation:
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Real time orientation of image on North or highside using a 3 axis magnetometer and 3 accelerometers
(APS 544 sensor). Accuracy depends on borehole configuration and latitude (inclination accuracy +/- 0.5 degree, azimuth accuracy
+/-1.0 degree)
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Max Logging Speed:
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1.5 m/min
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Surface acquisition system
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Systems :
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MGX II Logger with peripheral modem
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Data communications:
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Digital format asynchronous binary transmission fully compatible with
MGX II and
MSLog.
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Processing Software using WellCAD image module
WellCAD for Win32 is designed to work with many types of log data. WellCAD image module is an add on
option and allows image log display and processing like
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Unfolded image : zoom, aspect ratio, scrolling, brightness, contrast
(RGB), filtering.
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Images logs reorientation and filtering
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3D image logs or cores ( step and rotate)
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Cross section log
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Fracture picking on image log
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Structure log (projection or tadpole)
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Polar and Rose logs (stereograms, wulff/schmidts)
Ordering Information
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Description
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Order Number
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| OBI-40 Version 2 |
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530-OBI40-2-2001 |
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