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Cement, Casing & Tubing Evaluation
Acoustic Cement Bond Log (CBL)
Segmented Bond Tool (SBT)
Acoustic-Amplitudelog (AAL)
 
 
Acoustic Cement Bond Log (CBL)

The Acoustic Cement Bond Log is a valuable source of data pertaining to the effectiveness of the cement sheath surrounding the casing. These data are obtained by evaluating the effect of the casing, the cement sheath, and the formation on an acoustic wave emanating from the Cement   Bond Log instrument. The Amplitude Curve of the reflected acoustic wave is maximum in unsupported casing and minimum in those sections in which the cement is well bonded to the casing and the formation.

Part of the log presentation is a recording of the reflected acoustic wave form either as a half-wave or full-wave (Signature) or a "peak and valley-width" bar chart (Variable Density). These wave forms are used to identify the wave path and confirm the interpretation of the Amplitude Curve. When complete bonding is indicated, the through-the-formation wave is identifiable and can be used much like the open hole acoustic log.

     Applications

  • Determine effectiveness of cement bond in casing formation annulus
  • Locate areas for investigation with Tracer Surveys and Sonan Log for determining channeling in annulus cement
  • Determine annulus cement strength
  • Detect presence of microannulus

    Specifications

  • Series:
    1417 XA
  • Diameter:
    in. ( mm )      3.38 ( 85.7 )
  • MAX. Press:
    psi (MPa)     20,000 (137.9)
  • MAX. TEMP.:
    °F (°C)      450 ( 232 )

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