Feb 21, 2011

NGWA Offers Course on Borehole Geophysical Logging

Introductory-level course will cover all aspects of logs

The National Ground Water Assn. is offering the course “Borehole Geophysical Logging for Water Resources/Water Supply Applications” April 11 to 13 in San Jose, Calif.

The objective of this course is to provide a basic framework and criteria for the use of borehole geophysics (wireline logs) in the design or rehabilitation/abandonment of resource/water supply wells.

The course will cover:

• Introduction to borehole geophysics;
• Overview of main types and main uses of geophysical logs;
• Function, operation, uses and limitations of the various logs;
• Use of logs for identifying transmissive or water-producing zones in boreholes or wells;
• Use of logs for identifying fractures;
• Evaluating occurrence and distribution of aquifers and aquitards from logs;
• Evaluating relative water yields and planning well systems from logs;
• Use of logs for water quality (salinity) evaluation;
• Well construction evaluation from logs;
• Use of logs for well workovers, rehabilitation and abandonment;
• Basic log quality considerations and validation of logs;
• Log products to expect from vendors; and
• Overall project benefits from using logs.

This is an introductory-level course, and a background in borehole geophysics is not necessary. Participants should, however, have a general understanding of geology, hydrogeology and drilling operations. It is best suited to geologists and well site geologists, hydrogeologists, drillers, borehole geophysical service company operators, project managers and regulators.

The instructor is John Sciacca, geosciences director with Shaw Environmental & Infrastructure Inc. A California-registered geologist, he has more than 22 years professional experience.