ASTM D6726-15
(Guide)Standard Guide for Conducting Borehole Geophysical Logging—Electromagnetic Induction (Withdrawn 2024)
Standard Guide for Conducting Borehole Geophysical Logging—Electromagnetic Induction (Withdrawn 2024)
SIGNIFICANCE AND USE
5.1 An appropriately developed, documented, and executed guide is essential for the proper collection and application of induction logs. This guide is to be used in conjunction with Guide D5753.
5.2 The benefits of its use include improving: selection of induction logging methods and equipment; induction log quality and reliability; and usefulness of the induction log data for subsequent display and interpretation.
5.3 This guide applies to commonly used induction logging methods for geotechnical applications.
SCOPE
1.1 This guide is focused on the general procedures necessary to conduct electromagnetic-induction, induction, electromagnetic-conductivity, or electromagnetic-resistivity logging (hereafter referred as induction logging) of boreholes, wells, access tubes, caissons, or shafts (hereafter referred as boreholes) as commonly applied to geologic, engineering, groundwater and environmental (hereafter referred as geotechnical) explorations. Induction logging for minerals or petroleum applications is excluded.
1.2 This guide defines an induction log as a record of formation electrical conductivity or resistivity with depth as measured by the induction method in a borehole.
1.2.1 Induction logs are treated quantitatively and should be interpreted with other logs and data whenever possible.
1.2.2 Induction logs are commonly used to: (1) delineate lithology; (2) evaluate formation water quality and effective porosity, and (3) correlate stratigraphy between boreholes.
1.3 This guide is restricted to 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; which are the most common induction measurement devices used in geotechnical applications.
1.4 This guide provides an overview of induction logging including (1) general procedures; (2) specific documentation; (3 ) calibration and standardization; and (4) log quality and interpretation.
1.5 To obtain additional information on induction logs see References section in this guide.
1.6 This guide offers an organized collection of information or a series of options and does not recommend a specific course of action. This guide should not be used as a sole criterion for induction logging and does not replace education, experience, and professional judgment. Induction logging procedures should be adapted to meet the needs of a range of applications and stated in general terms so that flexibility or innovation are not suppressed. Not all aspects of this guide may be applicable in all circumstances. This ASTM standard is not intended to represent or replace the standard of care by which the adequacy of a given professional service must be judged without consideration of a project's many unique aspects. The word standard in the title of this document means that the document has been approved through the ASTM consensus process.
1.7 Units—The values stated in either inch-pound units or SI units [given in brackets] are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be use independently of the other. Combining values from the two systems may result in non-conformance with the standard. Add, if appropriate, “Reporting of test results in units other than SI shall not be regarded as nonconformance with this standard.”
1.8 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory requirements prior to use.
WITHDRAWN RATIONALE
This guide is focused on the general procedures necessary to conduct electromagnetic-induction, induction, electromagnetic-conductivity, or electromagnetic-resistivity logging (hereafter referred as induction logging) ...
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D6726 − 15
Standard Guide for
Conducting Borehole Geophysical Logging—
1
Electromagnetic Induction
This standard is issued under the fixed designation D6726; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* should be adapted to meet the needs of a range of applications
and stated in general terms so that flexibility or innovation are
1.1 This guide is focused on the general procedures neces-
not suppressed. Not all aspects of this guide may be applicable
sary to conduct electromagnetic-induction, induction,
in all circumstances. This ASTM standard is not intended to
electromagnetic-conductivity, or electromagnetic-resistivity
representorreplacethestandardofcarebywhichtheadequacy
logging (hereafter referred as induction logging) of boreholes,
of a given professional service must be judged without
wells, access tubes, caissons, or shafts (hereafter referred as
consideration of a project’s many unique aspects. The word
boreholes) as commonly applied to geologic, engineering,
standard in the title of this document means that the document
groundwater and environmental (hereafter referred as geotech-
has been approved through the ASTM consensus process.
nical) explorations. Induction logging for minerals or petro-
leum applications is excluded. 1.7 Units—The values stated in either inch-pound units or
SI units [given in brackets] are to be regarded separately as
1.2 This guide defines an induction log as a record of
standard. The values stated in each system may not be exact
formation electrical conductivity or resistivity with depth as
equivalents; therefore, each system shall be use independently
measured by the induction method in a borehole.
of the other. Combining values from the two systems may
1.2.1 Induction logs are treated quantitatively and should be
result in non-conformance with the standard. Add, if
interpreted with other logs and data whenever possible.
appropriate, “Reporting of test results in units other than SI
1.2.2 Induction logs are commonly used to: (1) delineate
shall not be regarded as nonconformance with this standard.”
lithology; (2) evaluate formation water quality and effective
1.8 This standard does not purport to address all of the
porosity, and (3) correlate stratigraphy between boreholes.
safety concerns, if any, associated with its use. It is the
1.3 This guide is restricted to induction measurements that
responsibility of the user of this standard to establish appro-
areatafrequencyoflessthan50KHz;arenon-directional;and
priate safety and health practices and determine the applica-
average formation properties around the circumference of the
bility of regulatory requirements prior to use.
borehole; which are the most common induction measurement
devices used in geotechnical applications.
2. Referenced Documents
1.4 This guide provides an overview of induction logging
2
2.1 ASTM Standards:
including (1) general procedures; (2) specific documentation;
D653 Terminology Relating to Soil, Rock, and Contained
(3 ) calibration and standardization; and (4) log quality and
Fluids
interpretation.
D5088 Practice for Decontamination of Field Equipment
1.5 To obtain additional information on induction logs see
Used at Waste Sites
References section in this guide.
D5608 Practices for Decontamination of Field Equipment
Used at Low Level Radioactive Waste Sites
1.6 This guide offers an organized collection of information
D5753 Guide for Planning and Conducting Borehole Geo-
oraseriesofoptionsanddoesnotrecommendaspecificcourse
physical Logging
of action. This guide should not be used as a sole criterion for
induction logging and does not replace education, experience,
3. Terminology
and professional judgment. Induction logging procedures
3.1 Definitions:
1
This guide is under the jurisdiction ofASTM Committee D18 on Soil and Rock
and is the direct responsibility of Subcommittee D18.01 on Surface and Subsurface
2
Characterization. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Dec. 1, 2015. Published January 2016. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 2001. Last previous edition approved in 2007 as D6727 – 01(2007). Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/D6726-15. the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright ©
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D6726 − 01 (Reapproved 2007) D6726 − 15
Standard Guide for
Conducting Borehole Geophysical Logging—
1
Electromagnetic Induction
This standard is issued under the fixed designation D6726; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope Scope*
1.1 This guide is focused on the general procedures necessary to conduct electromagnetic-induction, induction,
electromagnetic-conductivity, or electromagnetic-resistivity logging (hereafter referred as induction logging) of boreholes, wells,
access tubes, caissons, or shafts (hereafter referred as boreholes) as commonly applied to geologic, engineering, groundwater and
environmental (hereafter referred as geotechnical) investigations.explorations. Induction logging for minerals or petroleum
applications is excluded.
1.2 This guide defines an induction log as a record of formation electrical conductivity or resistivity with depth as measured
by the induction method in a borehole.
1.2.1 Induction logs are treated quantitatively and should be interpreted with other logs and data whenever possible.
1.2.2 Induction logs are commonly used to: (1) delineate lithology; (2) evaluate formation water quality and effective porosity,
and (3) correlate stratigraphy between boreholes.
1.3 This guide is restricted to 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; which are the most common induction measurement
devices used in geotechnical applications.
1.4 This guide provides an overview of induction logging including (1) general procedures; (2) specific documentation; (3 )
calibration and standardization; and (4) log quality and interpretation.
1.5 To obtain additional information on induction logs see References section in this guide.
1.6 This guide is to be used in conjunction with Standard Guide D5753.
1.6 This guide offers an organized collection of information or a series of options and does not recommend a specific course
of action. This guide should not be used as a sole criterion for induction logging and does not replace education, experience, and
professional judgement.judgment. Induction logging procedures should be adapted to meet the needs of a range of applications and
stated in general terms so that flexibility or innovation are not suppressed. Not all aspects of this guide may be applicable in all
circumstances. This ASTM standard is not intended to represent or replace the standard of care by which the adequacy of a given
professional service must be judged without consideration of a project’s many unique aspects. The word standard in the title of
this document means that the document has been approved through the ASTM consensus process.
1.7 Units—The geotechnical industry uses English or SI units. The induction log is typically recorded in millisiemens per meter
(mS/m) or millimhos per meter (mmhos/m).values stated in either inch-pound units or SI units [given in brackets] are to be
regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be
use independently of the other. Combining values from the two systems may result in non-conformance with the standard. Add,
if appropriate, “Reporting of test results in units other than SI shall not be regarded as nonconformance with this standard.”
1.8 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
requirements prior to use.
1
This guide is under the jurisdiction of ASTM Committee D18 on Soil and Rock and is the direct responsibility of Subcommittee D18.01 on Surface and Subsurface
Characterization.
Current edition approved July 1, 2007Dec. 1, 2015. Published August 2007January 2016. Originally approved in 2001. Last previous edition approved in 20012007 as
D6727 – 01.D6727 – 01(2007). DOI: 10.1520/D6726-01R07.10.1520/D6726-15.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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