The course is an introduction to the principles and qualitative applications of conventional well logs. The course shows how combinations of logs can be used to interpret mineralogy, lithology, facies, depositional environments, and major geological events such as flood surfaces or unconformities. The ultimate goal is to use well logging assemblies to establish robust correlation schemes that can be used to guide well positioning and geological modeling.The course uses a combination of lectures and stand-alone exercises based on real-world datasets. The course is based on tools and recordings of lithological and petrophysical parameters and allows, in a second time, to approach the combinations of measurements and the relationships with the burying of the rock with the depth. A series of practical exercises allows the interpretation of the well and then beyond the correlations between wells to address the sequential aspect up to the seismic calibration. The field development aspect is also part of the course. Depending on the time available, special cases of well studies with complex lithology can be studied. The course starts and ends with a quiz that makes it possible to locate the exact level of the participants but also at the end of the session the progress made.Learning Outcomes
Participants will learn to:
1. Differentiate the functions, physical principles and limitations of logging tools used in a standard logging suite and their applications for geological interpretation.
2. Demonstrate the differences between logs acquired using wireline conveyance and logs acquired whilst drilling.
3. Use well logs to determine lithologies and interpret facies, stratigraphic and structural features.
4. Determine shale volume, porosity and water saturation from well logs.
5. Correlate between wells using well logs, integrating other available down-hole data.
6. Analyze well logs and cores, together with other available data, to produce a coherent geological evaluation.
7. Employ dipmeter and borehole imaging tools and analyze their interpretation patterns to indicate structural and stratigraphic features.
8. DST interpretation