Validation of Cased-Hole Acoustic Tools

摘要

In some implementations, a method for validating an acoustic bond-log tool includes having a test fixture including a wellbore casing emulating tubing. An outer tubing emulates a well formation and forms a perimeter of an annulus surrounding the wellbore casing emulating tubing. The wellbore casing tubing is configured with a stepped outer surface emulating different wellbore casing sidewall thicknesses. A dividing structure is coupled in the axial direction to the outer surface of the wellbore casing emulating tubing and to the inner surface of the outer tubing to radially subdivide the annulus into a plurality of hermetically sealable sample sections. Each sample section contains a sample of a material having a known acoustic impedance. The acoustic bond-log tool is validated by comparing a bond-log tool measurement of the acoustic impedance of each sample in a particular sample section to the known acoustic impedance of the sample.

主权项

1. A method for validating an acoustic bond-log tool, comprising:
having a test fixture, comprising:
a wellbore casing emulating tubing with a bond-log tool receiving bore;an outer tubing forming a perimeter of an annulus surrounding the wellbore casing emulating tubing and emulating a well formation; anda dividing structure coupled in the axial direction to the outer surface of the wellbore casing emulating tubing and to the inner surface of the outer tubing to radially subdivide the annulus into a plurality of sample sections, each sample section containing a sample of a material having a known acoustic impedance; and validating the acoustic bond-log tool by comparing a bond-log tool measurement of the acoustic impedance of each sample in a particular sample section to the known acoustic impedance of the sample.