Multistage processing and inversion of corrosion detection tools

A method comprising:

• disposing a corrosion detection tool in a plurality of concentric pipes, wherein the corrosion detection tool comprises a transmitter and a plurality of receivers;
• stacking a number of log points in a buffer;
• running a first inversion, wherein the first inversion comprises a first subset of calibrated measurements that are used to compute a first estimate of properties of each of the concentric pipes;
• identifying one or more of the concentric pipes with an estimated thickness change from a nominal thickness to provide identified concentric pipes;
• selecting an innermost pipe from the identified concentric pipes with a thickness change for computing an impulse response for deconvolution;
• applying the deconvolution to a second subset of measurements;
• and
• running a second inversion, wherein the second inversion comprises at least one property of the plurality of concentric pipes, wherein the at least one property of the plurality of concentric pipes is constrained with a constraint.

A system comprising:

• a corrosion detection tool, wherein the corrosion detection tool compromises a transmitter and a plurality of receivers;
• and
• an information handling system operable to:
• measure a signal to provide a measured response;
• calibrate a log by matching a nominal value of the measured response to a synthetic response;
• and
• run a first inversion, wherein the first inversion comprises a first subset of calibrated measurements that are used to compute a first estimate of properties of one or more pipes;
• select an innermost concentric pipe from the one or more pipes for computing an impulse response for deconvolution for improving vertical resolution of the measured response;
• apply deconvolution to a second subset of the calibrated measurements to provide calibrated and deconvolved measurements;
• and
• run a second inversion on the second subset of calibrated and deconvolved measurements, wherein the second inversion comprises at least one property of the plurality of concentric pipes.