Geosciences
Well Logging and Log Interpretation
A programme in the principles and interpretation of conventional geophysical well logs, applied to the evaluation of groundwater aquifers: caliper and cement bond logs, gamma ray and spontaneous potential, neutron, density and sonic, resistivity, and qualitative analysis with charts and cross-plots, using logs from wells in Saudi Arabia.
Overview
About the programme
Duration
5 days
Training hours
25 hours
Delivery
Training hall · Virtual · At your premises
Language
Arabic or English
Objectives
Training outcomes
- Understand the measurement principles of conventional tools, the borehole environment, and the effect of drilling fluid and invasion on readings.
- Assess log quality, identify acquisition problems and apply the necessary corrections.
- Determine lithology and shale volume from gamma ray and spontaneous potential logs.
- Estimate porosity from density, neutron and sonic logs, and formation water salinity and water saturation from resistivity logs.
- Use cross-plots and charts in interpretation, and correlate wells.
Content
What the programme covers
Day 1: borehole environment, caliper and cement logs
- Purposes and equipment of well logging, and logging in open and cased holes.
- The borehole environment: drilling fluid, invasion and mudcake.
- The caliper log: measurement principle, tool types and applications.
- The cement bond log (CBL): principle and interpretation.
- Exercises on logs from wells in Saudi Arabia.
Day 2: gamma ray and spontaneous potential
- Principle of the gamma ray log, its calibration and response in different formations.
- The spectral gamma ray log: potassium, uranium and thorium.
- Principle of the spontaneous potential (SP) log and its response in sand-shale sequences.
- Estimating shale volume and identifying permeable beds, with exercises.
Day 3: porosity logs
- The density log: principle, tools and calibration.
- The neutron log: principle, tools and scales.
- The sonic log and transit time.
- Estimating lithology and porosity by combining logs, with exercises.
Day 4: resistivity logs
- Basic theory and the resistivity of rocks and fluids.
- Types of resistivity tools and their depths of investigation.
- Formation factor and Archie’s law, and estimating formation water salinity (TDS) and water saturation.
- Exercises on water well logs.
Day 5: qualitative analysis and correlation
- Cross-plot techniques, and temperature and fluid resistivity corrections.
- Lithology, shale volume, porosity and water saturation charts.
- Well correlation and building an aquifer cross-section.
- Final exercise on the logs of a complete well, followed by the assessment.
Who it is for
Target audience
Geologists, geophysicists and hydrogeologists, and the engineers and technical assistants who supervise well logging or interpret logs in the water, mining and energy sectors.
Method
Delivery method
Lectures and daily exercises on real logs from water wells in Saudi Arabia, using spreadsheets and charts. The organisation may bring its own well logs for analysis in the exercises. Delivered in Arabic or English.
Questions
FAQ
Is the programme limited to groundwater wells?
The examples come from groundwater wells; the same principles apply to mining and energy wells, and part of the exercises can be directed towards the organisation’s sector.
Does the programme need specialised log interpretation software?
No. Exercises are done with spreadsheets and charts; specialised interpretation software can be shown if the organisation has it.
Is there a certificate?
Every participant who attends the programme and passes the assessment receives a certificate of completion from Technology Experts Training Center, licensed by the Technical and Vocational Training Corporation.
A programme tailored to your organisation
The duration and topics of the programme are adjusted to the organisation's needs, and it is delivered at its site, in a training hall arranged by the Center, or virtually.