Standard Test Method for Permeability of Rocks by Flowing Air

SIGNIFICANCE AND USE
5.1 This test method is designed to measure the permeability to air of a small sample of rock. By extrapolation, this test method also determines an equivalent of the liquid permeability. This parameter is used to calculate the flow through rock of fluids subjected to a pressure differential. Note 1—The quality of the result produced by this standard is dependent on the competence of the personnel performing it, and the suitability of the equipment and facilities used. Agencies that meet the criteria of Practice D3740 are generally considered capable of competent and objective testing. Users of this standard are cautioned that compliance with Practice D3740 does not in itself assure reliable results. Reliable results depends on many factors; Practice D3740 provides a means of evaluating some of those factors.
SCOPE
1.1 This test method covers the determination of the coefficient of specific permeability for the flow of air through rocks. The method establishes representative values of the coefficient of permeability of rocks or well-indurated soils.  
1.2 This test method is limited to permeability values greater than 9.869 × 10-18 m2 (0.01 millidarcy), and is limited to rocks free of oil or unctuous matter.  
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard.  
1.4 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D6026.  
1.4.1 The procedures used to specify how data are collected/recorded or calculated, in this standard are regarded as the industry standard. In addition, they are representative of the significant digits that generally should be retained. The procedures used do not consider material variation, purpose for obtaining the data, special purpose studies, or any considerations for the user’s objectives; and it is common practice to increase or reduce significant digits of reported data to be commensurate with these considerations. It is beyond the scope of this standard to consider significant digits used in analytical methods for engineering design.  
1.5 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 limitations prior to use.

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31-Oct-2013
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D4525 − 13
StandardTest Method for
1
Permeability of Rocks by Flowing Air
This standard is issued under the fixed designation D4525; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* D653Terminology Relating to Soil, Rock, and Contained
Fluids
1.1 This test method covers the determination of the coef-
D3740Practice for Minimum Requirements for Agencies
ficient of specific permeability for the flow of air through
Engaged in Testing and/or Inspection of Soil and Rock as
rocks. The method establishes representative values of the
Used in Engineering Design and Construction
coefficient of permeability of rocks or well-indurated soils.
D6026Practice for Using Significant Digits in Geotechnical
1.2 This test method is limited to permeability values
Data
2
greater than 9.869 × 10-18 m (0.01 millidarcy), and is limited
3
2.2 American Petroleum Institute Standard:
to rocks free of oil or unctuous matter.
RP-40Recommended Practice for Core Analysis Procedure
1.3 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are mathematical
3. Terminology
conversions to inch-pound units that are provided for informa-
3.1 Definitions—For definitions of common technical terms
tion only and are not considered standard.
in this standard, refer to Terminology D653.
1.4 All observed and calculated values shall conform to the
guidelines for significant digits and rounding established in
4. Summary of Test Method
Practice D6026.
4.1 The permeability of a rock sample is measured by
1.4.1 Theproceduresusedtospecifyhowdataarecollected/
flowing dry air through the specimen and measuring the
recorded or calculated, in this standard are regarded as the
absolute pressure, the flow rate, and absolute pressure differ-
industry standard. In addition, they are representative of the
entialoftheair.Threeormoretestsareperformedonasample
significant digits that generally should be retained. The proce-
at different mean air pressure values. The permeability values
dures used do not consider material variation, purpose for
are plotted as a function of the reciprocal mean absolute
obtaining the data, special purpose studies, or any consider-
pressure; those points lying on a straight line are extrapolated
ations for the user’s objectives; and it is common practice to
increase or reduce significant digits of reported data to be to a value corresponding to an infinite mean air pressure to
obtain an equivalent permeability value for liquids.
commensuratewiththeseconsiderations.Itisbeyondthescope
of this standard to consider significant digits used in analytical
methods for engineering design. 5. Significance and Use
1.5 This standard does not purport to address all of the
5.1 This test method is designed to measure the permeabil-
safety concerns, if any, associated with its use. It is the
ity to air of a small sample of rock. By extrapolation, this test
responsibility of the user of this standard to establish appro-
method also determines an equivalent of the liquid permeabil-
priate safety and health practices and determine the applica-
ity.Thisparameterisusedtocalculatetheflowthroughrockof
bility of regulatory limitations prior to use.
fluids subjected to a pressure differential.
2. Referenced Documents NOTE 1—The quality of the result produced by this standard is
dependent on the competence of the personnel performing it, and the
2
2.1 ASTM Standards:
suitability of the equipment and facilities used. Agencies that meet the
criteria of Practice D3740 are generally considered capable of competent
andobjectivetesting.Usersofthisstandardarecautionedthatcompliance
1
ThistestmethodisunderthejurisdictionofASTMCommitteeD18onSoiland
with Practice D3740 does not in itself assure reliable results. Reliable
Rock and is the direct responsibility of Subcommittee D18.12 on Rock Mechanics.
results depends on many factors; Practice D3740 provides a means of
Current edition approved Nov. 1, 2013. Published December 2013. Originally
evaluating some of those factors.
approved in 1985. Last previous edition approved in 2008 as D4525 – 08. DOI:
10.1520/D4525-13.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contactASTM Customer Service at service@astm.org. ForAnnual Book ofASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available from American Petroleum Institute (API), 1220 L. St., NW,
the ASTM website. Washington, DC 20005-4070, http://www.api.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr
...

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: D4525 − 08 D4525 − 13
Standard Test Method for
1
Permeability of Rocks by Flowing Air
This standard is issued under the fixed designation D4525; 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*
1.1 This test method covers the determination of the coefficient of specific permeability for the flow of air through rocks. The
proceduremethod establishes representative values of the coefficient of permeability of rocks or well-indurated soils.
2
1.2 This test method is limited to permeability values greater than 0.9869 pm9.869 × 10-18 m (1.0 picodarcy),(0.01 millidarcy),
and is limited to rocks free of oil or unctuous matter.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are mathematical
conversions to inch-pound units that are provided for information only and are not considered standard.
1.4 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice
D6026.
1.4.1 The procedures used to specify how data are collected/recorded or calculated, in this standard are regarded as the industry
standard. In addition, they are representative of the significant digits that generally should be retained. The procedures used do not
consider material variation, purpose for obtaining the data, special purpose studies, or any considerations for the user’s objectives;
and it is common practice to increase or reduce significant digits of reported data to be commensurate with these considerations.
It is beyond the scope of this standard to consider significant digits used in analytical methods for engineering design.
1.5 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
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
D653 Terminology Relating to Soil, Rock, and Contained Fluids
D3740 Practice for Minimum Requirements for Agencies Engaged in Testing and/or Inspection of Soil and Rock as Used in
Engineering Design and Construction
D6026 Practice for Using Significant Digits in Geotechnical Data
3
2.2 American Petroleum Institute Standard:
RP-40 Recommended Practice for Core Analysis Procedure
3. Terminology
3.1 Definitions—For terminology used definitions of common technical terms in this test method, standard, refer to Terminology
D653.
4. Summary of Test Method
4.1 The permeability of a rock sample is measured by flowing dry air through the specimen and measuring the absolute pressure,
the flow rate, and absolute pressure differential of the air. Three or more tests are performed on a sample at different mean air
pressure values. The permeability values are plotted as a function of the reciprocal mean absolute pressure; those points lying on
a straight line are extrapolated to a value corresponding to an infinite mean air pressure to obtain an equivalent permeability value
for liquids.
1
This test method is under the jurisdiction of ASTM Committee D18 on Soil and Rock and is the direct responsibility of Subcommittee D18.12 on Rock Mechanics.
Current edition approved July 1, 2008Nov. 1, 2013. Published July 2008December 2013. Originally approved in 1985. Last previous edition approved in 20042008 as
D4525 – 04.D4525 – 08. DOI: 10.1520/D4525-08.10.1520/D4525-13.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from American Petroleum Institute (API), 1220 L. St., NW, Washington, DC 20005-4070, http://www.api.org.
*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
1

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D4525 − 13
5. Significance and Use
5.1 This test method is designed to measure the permeability to air of a small sample of rock. By extrapolation, this test method
also determines an equivalent of the liquid permeability. This parameter is used
...

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