ASTM_D_6726_-_01_2007.pdf

Designation:D672601(Reapproved 2007)Standard Guide forConducting Borehole Geophysical LoggingElectromagnetic Induction1This standard is issued under the fixed designation D6726;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This guide is focused on the general procedures neces-sarytoconductelectromagnetic-induction,induction,electromagnetic-conductivity,or electromagnetic-resistivitylogging(hereafter referred as induction logging)of boreholes,wells,access tubes,caissons,or shafts(hereafter referred asboreholes)as commonly applied to geologic,engineering,groundwater and environmental(hereafter referred as geotech-nical)investigations.Induction logging for minerals or petro-leum applications is excluded.1.2 This guide defines an induction log as a record offormation electrical conductivity or resistivity with depth asmeasured by the induction method in a borehole.1.2.1 Induction logs are treated quantitatively and should beinterpreted with other logs and data whenever possible.1.2.2 Induction logs are commonly used to:(1)delineatelithology;(2)evaluate formation water quality and effectiveporosity,and(3)correlate stratigraphy between boreholes.1.3 This guide is restricted to induction measurements thatare at a frequency of less than 50 KHz;are non-directional;andaverage formation properties around the circumference of theborehole;which are the most common induction measurementdevices used in geotechnical applications.1.4 This guide provides an overview of induction loggingincluding(1)general procedures;(2)specific documentation;(3)calibration and standardization;and(4)log quality andinterpretation.1.5 To obtain additional information on induction logs seeReferences section in this guide.1.6 This guide is to be used in conjunction with StandardGuide D5753.1.7 This guide offers an organized collection of informationor a series of options and does not recommend a specific courseof action.This guide should not be used as a sole criterion forinduction logging and does not replace education,experience,and professional judgement.Induction logging proceduresshould be adapted to meet the needs of a range of applicationsand stated in general terms so that flexibility or innovation arenot suppressed.Not all aspects of this guide may be applicablein all circumstances.This ASTM standard is not intended torepresent or replace the standard of care by which the adequacyof a given professional service must be judged withoutconsideration of a projects many unique aspects.The wordstandard in the title of this document means that the documenthas been approved through the ASTM consensus process.1.8 The geotechnical industry uses English or SI units.Theinduction log is typically recorded in millisiemens per meter(mS/m)or millimhos per meter(mmhos/m).1.9 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory requirements prior to use.2.Referenced Documents2.1 ASTM Standards:2D420 Guide to Site Characterization for Engineering Designand Construction Purposes(Withdrawn 2011)3D653 Terminology Relating to Soil,Rock,and ContainedFluidsD5088 Practice for Decontamination of Field EquipmentUsed at Waste SitesD5608 Practices for Decontamination of Field EquipmentUsed at Low Level Radioactive Waste SitesD5730 Guide for Site Characterization for EnvironmentalPurposes With Emphasis on Soil,Rock,the Vadose Zoneand Groundwater(Withdrawn 2013)3D5753 Guide for Planning and Conducting Borehole Geo-physical Logging1This guide is under the jurisdiction ofASTM Committee D18 on Soil and Rockand is the direct responsibility of Subcommittee D18.01 on Surface and SubsurfaceCharacterization.Current edition approved July 1,2007.Published August 2007.Originallyapproved in 2001.Last previous edition approved in 2001 as D6727 01.DOI:10.1520/D6726-01R07.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 D6167 Guide for Conducting Borehole Geophysical Log-ging:Mechanical CaliperD6235 Practice for Expedited Site Characterization of Va-dose Zone and Groundwater Contamination at HazardousWaste Contaminated SitesD6274 Guide for Conducting Borehole Geophysical Log-ging-GammaD6429 Guide for Selecting Surface Geophysical MethodsD6431 Guide for Using the