Recent advances in borehole imaging based on the circumferential borehole imaging log (CBIL)

Conference · Sat Sep 01 04:00:00 EDT 1990 · AAPG Bulletin (American Association of Petroleum Geologists); (USA)

OSTI ID:6130468

Fertl, W H ^[1]

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1. Atlas Wireline Services, Houston, TX (USA)

The recently introduced Circumferential Borehole Imaging Log (CBIL) is recorded by an acoustic borehole imaging device that utilizes a rotating pulse-echo transducer to scan and provide an image of the entire (360{degree}) circumference of the borehole wall. A transducer rotates at the rate of six times per second and acquires 250 measurement per revolution. Two key parameters are being measured: the amplitude of the reflected acoustic wave (which corresponds to variations in the rock properties) and the acoustic travel time (which is indicative of the distance from the transducer to the wellbore wall). The CBIL provides a complete, detailed 360{degree} borehole image in fresh, salt, and oilbased drilling fluids. Applications are manyfold and include: detection and orientation of fractures, vugs, and borehole breakouts (washouts); orientation and correlation of whole cores; sand/shale ratios in thin-bedded intervals; recognition of depositional features (e.g., highly laminated and/or crossbedded intervals); borehole geometry via high-resolution acoustic caliper data; generation of borehole cross sections and synthetic cores, bed orientation, etc. Field examples illustrate these various applications in detailed reservoir description.

• OSTI ID: 6130468
• Report Number(s): CONF-9010204--
• Conference Information: Journal Name: AAPG Bulletin (American Association of Petroleum Geologists); (USA) Journal Volume: 74:9
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
58 GEOSCIENCES
580000 -- Geosciences
BOREHOLES
CAVITIES
CROSS SECTIONS
EXPLORATION
GEOLOGIC DEPOSITS
GEOMETRY
MATHEMATICS
MINERAL RESOURCES
PETROLEUM DEPOSITS
RESERVOIR ROCK
RESOURCES
ROCKS
SANDSTONES
SEDIMENTARY ROCKS
SHALES
WELL LOGGING