Incremental time lapse detection of corrosion in well casings

A pipe characterization system comprising:

• multiple nested conductive pipes;
• a pipe characterization tool disposed in the multiple nested conductive pipes and configured to:
• obtain first measurements of the multiple nested conductive pipes at a first time subsequent to placement of at least one of the multiple nested conductive pipes in a wellbore;
• and
• obtain second measurements of the multiple nested conductive pipes at a second time subsequent to the first time;
• and
• processing circuitry to:
• calculate a thickness change of the multiple nested conductive pipes between the first time and the second time;
• predict a future thickness of the multiple nested conductive pipes at a time subsequent to the second time, based on the thickness change;
• and
• generate a well treatment decision based on the future thickness.

A machine-readable storage device having instructions stored thereon, which, when executed by a machine, cause the machine to perform operations, the operations comprising:

• making a first set of log measurements, at a first time, using a pipe characterization tool disposed in multiple nested conductive pipes in a wellbore;
• determining total thickness of the multiple nested conductive pipes at the first time;
• and
• making a second set of log measurements, at a second time, using the pipe characterization tool disposed in the multiple nested conductive pipes.