CBIL – Circumferential Borehole Imaging Log

The Circumferential Borehole Imaging Log (CBIL) is an ultrasonic acoustic device designed to produce detailed images of the wellbore wall (or casing).

The CBIL pulse-echo transducer emits a high-frequency acoustic pulse and measures the amplitude and the time of flight of the reflected wave. The amplitude of the reflected wave is affected by variations in the borehole surface. The travel time is indicative of the distance from the transducer to the wellbore wall. The acoustic transducer is mounted on a rotating section, allowing the CBIL to scan the full 360° of the wellbore, producing two images or maps.

Applications

• Orientation and depth matching of cores obtained while drilling

• Faults and unconformities

• Fractures, vugs, and washouts

• Location and evaluation of internal casing corrosion, mechanical wear, defects, and Perforations

Features & Benefits

• Full-borehole 360° coverage

• High-resolution acoustic images

• Accurate borehole geometry for geomechanics

• Performs well in unconsolidated and high-porosity formations

Specification