ASTM D6726-15 PDF Download

The ASTM D6726-15 standard provides a comprehensive guide for the proper collection and application of induction logs in geotechnical explorations. This guide should be used in conjunction with Guide D5753.

The standard aims to improve the selection of induction logging methods and equipment, enhance the quality and reliability of induction logs, and increase the usefulness of the data obtained for subsequent display and interpretation. It specifically applies to commonly used induction logging methods for geotechnical applications and excludes minerals or petroleum applications.

The guide defines an induction log as a record of formation electrical conductivity or resistivity with depth, measured using the induction method in a borehole. These logs are treated quantitatively and should be interpreted with other logs and data whenever possible. They are commonly used to delineate lithology, evaluate formation water quality and effective porosity, and correlate stratigraphy between boreholes.

The standard focuses on induction measurements that are at a frequency of less than 50 KHz, are non-directional, and average formation properties around the circumference of the borehole. It provides an overview of induction logging procedures, including general procedures, specific documentation, calibration and standardization, and log quality and interpretation.

It is important to note that this guide offers an organized collection of information and options, but does not recommend a specific course of action. It should not be used as the sole criterion for induction logging and does not replace education, experience, and professional judgment. The procedures outlined in the guide should be adapted to meet the needs of different applications, and flexibility and innovation should not be suppressed.