Production logging looks simple and is not. A spinner measures apparent velocity, which must be corrected for tool speed, deviation, fluid slippage and wellbore geometry before it becomes a rate. Holdup sensors measure the fraction of each phase at the sensor position, which in a deviated well can be very different from the average across the pipe because gas rides the high side and water the low side. Interpreting these measurements requires understanding what the tool actually responds to.

Job design is where most log quality is decided. Multiple passes at different speeds, in both directions, with stationary readings at key depths, allow spinner calibration and give the redundancy needed to distinguish real features from noise. A log run in a single pass at one speed can rarely be interpreted with confidence, and no amount of processing recovers what was not acquired.

The value comes from acting on the result. A log that shows the bottom half of an interval producing all the water tells the engineer exactly what to shut off. A log that shows a thief zone taking injection tells the reservoir engineer why sweep is poor. A temperature anomaly behind a packer identifies a leak that pressure testing did not find. This course covers the acquisition and interpretation needed to reach conclusions that can be acted on.

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

• Describe production logging sensors and the physical quantities they measure.
• Explain spinner response, calibration and correction for tool speed and deviation.
• Interpret fluid density, capacitance and resistance holdup measurements.
• Apply array tools in deviated and horizontal wells.
• Plan production logging jobs, including conveyance, passes and stations.
• Apply quality control to acquired logs.
• Calculate velocity, holdup and phase rates and construct flow profiles.
• Interpret multiphase flow profiles and identify water and gas entry points.
• Identify crossflow, thief zones, channelling and mechanical leaks.
• Interpret injection well logs and integrate production logs with other data.

Organisations sending participants to this training will:

• Identify which zones produce, and where water and gas enter.
• Target water shut-off, stimulation and recompletion work accurately.
• Diagnose leaks and crossflow that other methods miss.
• Improve injection distribution and sweep.
• Improve the quality of logging jobs commissioned from service companies.

Participants will:

Understand what each production logging sensor measures.

Be able to plan a production logging job that can be interpreted.

Be able to quality control and interpret production logs.

Be able to construct flow profiles and identify entry points.

Be able to integrate log results with well tests and surveillance data.

• Production engineers
• Reservoir engineers
• Well surveillance and intervention engineers
• Petrophysicists and log analysts
• Completion engineers
• Operations engineers involved in well diagnostics

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.