Multi-barrier wellbore integrity inspection system with eccentricity correction

A downhole inspection system, comprising:

• a neutron imaging device operable to generate data for detecting potential wellbore anomalies, wherein the neutron imaging device comprises:
• a neutron generator operable to emit neutrons;
• and
• a neutron detector fixed relative to the neutron generation unit and operable to detect backscattered neutrons from a surrounding environment;
• an electromagnetic imaging device operable to generate data for detecting wellbore eccentricity, wherein the electromagnetic imaging device comprises:
• at least one transmitter for generating electromagnetic pulse;
• and
• at least one receiver for detecting returning electromagnetic pulse,
• wherein correlation of the neutron imaging data with the electromagnetic imaging data provides additional data regarding the potential wellbore anomalies.

A method of inspecting a wellbore, comprising:

• positioning a neutron imaging device in a wellbore having a casing comprising one or more layers;
• emitting neutrons into a portion of a wellbore environment;
• detecting backscattered neutrons from the portion of the wellbore environment;
• generating neutron data for the portion of the wellbore, based at least in part on the detected backscattered neutrons;
• positioning an electromagnetic pulse imaging device in the portion of the wellbore;
• generating electromagnetic pulses towards the portion of the wellbore;
• detecting returning electromagnetic pulses generated from eddy currents induced in the casing at the portion of the wellbore;
• generating electromagnetic data for the portion of the wellbore based at least in part on the detected returning electromagnetic pulses;
• determining if casing eccentricity is present in the portion of the wellbore based on the electromagnetic data;
• and
• correlating the neutron data and the electromagnetic data to determine if a wellbore anomaly is present, wherein the potential wellbore anomaly is structural and not due to casing eccentricity.