A conventional bond log measures how much acoustic energy the casing loses to what is behind it, averaged around the circumference. That makes it good at detecting whether cement is present and well bonded overall, and poor at finding a narrow channel, because a well-bonded three quarters of the circumference can mask a quarter that is open.

Ultrasonic tools address that by measuring around the circumference and distinguishing solid, liquid and gas by acoustic impedance. They can map channels and gas pockets, but they are sensitive to mud properties, casing condition and lightweight cements whose impedance is close to that of mud. Using both tools together, with their limitations understood, gives the most reliable answer.

Micro-annulus is the most common interpretation dispute. A thin gap between casing and cement, caused by pressure or temperature changes after setting, degrades the bond log response without necessarily being a flow path. Running a pass under pressure and comparing responses is the standard way to distinguish it from a genuine channel, and it is often skipped.

By the end of this training, participants will be able to:

• Explain acoustic bond logging principles and the measurements made.
• Interpret amplitude, travel time and variable density displays.
• Explain ultrasonic tool principles, impedance measurement and azimuthal coverage.
• Interpret ultrasonic cement maps and discriminate solid, liquid and gas.
• Apply flexural wave and third interface measurements.
• Apply log quality control, including centralisation and free pipe normalisation.
• Identify micro-annulus and design pressure pass programmes.
• Interpret logs in lightweight cement, foamed cement and difficult casing conditions.
• Integrate log results with pressure tests, temperature surveys and well history.
• Make remedial decisions based on evaluation results.

The course is instructor-led and interpretation-based. Participants work through a large set of real cement evaluation logs, including conventional, ultrasonic and combined runs, forming interpretations and recommending actions. Cases include logs that led to unnecessary remedial work and logs where real channels were missed. Participants are encouraged to bring their own logs for discussion.

Organisations sending participants to this training will:

• Make correct decisions about whether cement jobs achieved isolation.
• Avoid unnecessary remedial cementing driven by misread logs.
• Identify genuine isolation failures before they become integrity problems.
• Improve the specification and quality of logging runs.
• Support abandonment and integrity requirements with reliable evaluation.

Participants will:

• Understand what each cement evaluation tool measures.
• Be able to interpret conventional and ultrasonic logs.
• Be able to identify micro-annulus and distinguish it from channels.
• Be able to assess log quality and reject unusable data.
• Be able to make and defend remedial recommendations.

• Drilling and well engineers
• Well integrity engineers
• Petrophysicists and log analysts
• Completion and intervention engineers
• Cementing service company staff
• Technical authorities reviewing well integrity

Upon successful completion of this training course, delegates will be awarded an official Certificate of Completion issued by the Petroleum Engineers Association (PEA), an ISO 9001:2015 certified training organization. The certificate carries 10 Credits and formally records the total learning hours completed.

Each certificate is signed by the Course Facilitator and the CEO of the Petroleum Engineers Association, and serves as verifiable proof of professional training that delegates can present to employers and professional bodies worldwide.