Borehole Geophysical Logging

Abstract

The course will introduce students to modern borehole logging techniques with the emphasis on geotechnical rather than oil and gas well reservoir engineering. Although the principles of operation of the various sondes will be covered, the primary focus will be on application. Surface-to-borehole and borehole-to-borehole seismic methods for rock mass characterisation will also be covered

Objective

The course will introduce students to modern borehole logging techniques with the emphasis on geotechnical rather than oil and gas well reservoir engineering. Although the principles of operation of the various sondes will be covered, the primary focus will be on application. For a given problem in a given environment, the students should be able to design a logging program that will furnish the requisite information. They will also be able to extract information on rock mass/reservoir properties by combining curves from a suite of logs. The students will also learn about surface-to-borehole and borehole-to-borehole seismic methods for rock mass characterisation. This will include VSP and tomography.

Content

Week 1: Introduction/Rock mass or reservoir properties we would like to measure/ Borehole geometry logs/ Caliper / Acoustic televiewer Week 2: Electrical logs & fracture imaging logs (optical televiewer, acoustic televiewer, microresistivity). Week 3: Radioactive logs/ Borehole ravity logs/ Seismic logs Week 4: Seismic and radar Cross-hole methods 1 Week 5: Seismic and radar Cross-hole methods 2/ Combining geophysical logs Week 6: Field trip (entire day) Week 7: Post-field data analysis

Resources