Advantages and Limitations

Advantages

  1. Nonintrusive.
  2. Rapid
  3. Inexpensive
  4. Can show chronological history.
  5. Can compliment other testing measurements.
  6. Appropriate for calibrating fracture models.

Current Limitations

  1. Are frictional effects in the tubulars adequately handled?
  2. Coupled with two dimensional fracturing model?
  3. May be susceptible to changes in fracture compliance due to cake.
  4. Some doubt about selection of the average fracture width?
  5. Some concern about the effects of near wellbore tortuosity and height?
  6. Some anecdotal inferences as to insensitivity to fracture height?
  7. Some possibility for interpretative confusion due to out-of-gauge but unfractured wellbores?
  8. Bias towards uppermost fractures or washouts?
  9. Anecdotal references to excessive attenuation if the fracture is too long?

 

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