This course provides participants with an understanding of basic concepts and methodology for well log acquisition and interpretation of subsurface environment.
Duration: 5 days
Upon completion of the course, participants are expected to be able:
- To understand wireline and mud log acquisition techniques
- To understand the fundamentals of log measurements, applications and log quality control
- Carry out basic log interpretation in order to determine reservoir intervals and fluid content
BASIC INTERPRETATION CONCEPTS (1 DAY)
Reservoirs and seals.
Definition of main reservoir petrophysical and fluid properties (lithology, porosity, saturation and volume of shale).
Fundamental equations for log interpretations in clean formations (Archie’s equation).
Measurement environment (drilling, borehole and invasion process).
MEASUREMENTS AND APPLICATIONS (2 DAYS)
Mud logging and coring operations.
Wireline logging operations.
Well log essentials: header, calibrations, parameters, scales etc.
Logging tool principle, limitation, application and quality control.
Caliper, gamma ray and spontaneous potential.
Determination of volume of shale (Vshale).
Fluid type determination: resistivity (induction and lateralog) and microresistivity measurements.
Porosity and lithology measurements: density, neutron and acoustic/ sonic logging.
BASIC LOG INTERPRETATION (2 DAYS)
Wireline log interpretation in clean formations.
- Identification of different types of lithology (shales and sandstones).
- Cross-plot techniques with density and neutron logs.
- Fluid contacts identification.
- Effects of hydrocarbons on logs.
- Lithology and porosity determination.
- Determination of water resistivity (SP, Ratio and Rwa method).
- Determination of fluid saturations.
- Estimation of porosity.
- Quick look interpretation and hands-on exercises.