Cased Hole Logging & Formation Evaluation
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Program Professional Framework
Cased Hole Logging & Formation Evaluation
Program Overview
Once a well is cased, logging remains the main way to track saturation changes, locate bypassed oil, verify cement and monitor casing condition. This course covers cased hole measurements and their interpretation: pulsed neutron capture (sigma) and carbon/oxygen logging for saturation monitoring, cased hole neutron and gamma ray, cement bond and ultrasonic evaluation, corrosion logging with multi-finger calipers and electromagnetic tools, and an introduction to production logging. Participants integrate cased hole results with open hole data to evaluate formations behind pipe and support workover and surveillance decisions in mature waterflooded fields.
Learning Outcomes
- ✓Select appropriate cased hole tools for saturation monitoring, cement evaluation or casing inspection objectives.
- ✓Interpret pulsed neutron sigma logs to estimate water saturation behind casing.
- ✓Apply carbon/oxygen logging to evaluate saturation where formation water salinity is low or unknown.
- ✓Evaluate cement bond quality from CBL/VDL and ultrasonic data.
- ✓Assess casing wall loss and deformation using multi-finger caliper and electromagnetic logs.
- ✓Combine time-lapse cased hole and open hole data to identify bypassed hydrocarbons and recommend actions.
Target Audience
- Petrophysicists and log analysts
- Reservoir and production engineers
- Well integrity engineers
- Operations geologists and surveillance engineers
Detailed Program Modules
01Cased Hole Environment and Objectives
- Effects of casing, cement and borehole fluids on measurements
- Surveillance objectives in mature fields
- Planning a cased hole logging programme
02Nuclear Measurements Behind Casing
- Gamma ray and spectral gamma ray
- Cased hole neutron porosity
- Depth control and correlation with open hole logs
03Saturation Monitoring
- Pulsed neutron capture and sigma interpretation
- Carbon/oxygen logging
- Time-lapse saturation analysis
04Cement Evaluation
- CBL/VDL principles and interpretation
- Ultrasonic imaging tools
- Microannulus and channel identification
05Casing Inspection and Corrosion Logging
- Multi-finger caliper surveys
- Electromagnetic thickness tools
- Integrity reporting and remaining strength
06Integrated Evaluation and Decisions
- Combining cased hole and open hole data
- Identifying bypassed pay and water sources
- Introduction to production logging for surveillance
Training Methodology
Applied Project & Assessment
Applied Project
Participants interpret a provided cased hole dataset from a waterflooded Gulf reservoir, including sigma, cement and caliper logs, and present a well evaluation with saturation changes, integrity findings and a recommended workover or surveillance action.
Assessment
Short diagnostic at the start, practical tasks linked to each learning outcome, and evaluation of the applied project against published criteria.