ASTM D8037/D8037M-16
(Practice)Standard Practice for Direct Push Hydraulic Logging for Profiling Variations of Permeability in Soils
Standard Practice for Direct Push Hydraulic Logging for Profiling Variations of Permeability in Soils
SIGNIFICANCE AND USE
5.1 The injection logging system provides a rapid and efficient way to ascertain the pressure required to inject water into unconsolidated formations at the given flow rate in real time (Fig. 1) (1-4, 7).5 The measured injection pressure and flow rate are then used to assess variations in formation permeability versus depth and infer changes in formation lithology and understand the local hydrostratigraphy (1-4, 8-16). Log interpretation should be confirmed with targeted soil coring adjacent to selected log locations or running logs adjacent to one or more previously logged borings. Practice D3740 was developed for agencies engaged in the testing and/or inspection of soils and rock. As such, it is not totally applicable to agencies performing this practice. However, users of this practice should recognize that the framework of Practice D3740 is appropriate for evaluating the quality of an agency performing this practice. Currently there is no known qualifying national authority that inspects agencies that perform this practice.
SCOPE
1.1 This practice describes a method for rapid delineation of variations in formation permeability in the subsurface using an injection logging tool. Clean water is injected from a port on the side of the probe as it is advanced at approximately 2cm/s into virgin soils. Logging with the injection tool is typically performed with direct push equipment, however other drilling machines may be modified to run the logs by direct push methods (for example, addition of a suitable hammer and/or hydraulic ram systems). Injection logs exceeding 100 ft [30m] depth have been obtained. Direct push methods are not intended to penetrate consolidated rock and may encounter refusal in very dense formations or when cobbles or boulders are encountered in the subsurface. However, injection logging has been performed in some semi-consolidated or soft formations.
1.2 This standard practice describes how to obtain a real time vertical log of injection pressure and flow rate with depth. The data obtained is indicative of the variations of permeability in the subsurface and is typically used to infer formation lithology. The person(s) responsible for review, interpretation and application of the injection logging data should be familiar with the logging technique as well as the soils, geology and hydrogeology of the area under investigation.
1.3 The injection logging system may be operated with a built in electrical conductivity sensor to provide additional real time information on stratigraphy and is essential for targeting test zones. Other sensors, such as fluorescence detectors (Practice D6187), a membrane interface probe (Practice D7352) or a cone penetration tool (Test Method D5778) may be used in conjunction with injection logging to provide additional information. The use of the injection logging tool in concert with an electrical conductivity array or cone penetration tool is highly recommended (although not mandatory) to further define hydrostratigraphic conditions, such as migration pathways, low permeability zones (for example, aquitards) and to guide confirmation sampling. The EC log and injection pressure log may be compared in some settings to identify the presence of ionic contaminants or ionic injectates used for remediation.
1.4 The injection logging system does not provide quantitative permeability or hydraulic conductivity information. However, injection pressure and flow data may be used to provide a qualitative indication of formation permeability. Semi-quantitative values of permeability may be obtained by correlation of injection logging data with other methods (1-4).2 Also, a log of estimated hydraulic conductivity (5) may be calculated for the saturated zone using an empirical model included in some versions of the log viewing software. The data allows for estimates of hydraulic conductivity (K) at the inch-scale using the corrected injection pressure ...
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Standards Content (Sample)
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:D8037/D8037M −16
Standard Practice for
Direct Push Hydraulic Logging for Profiling Variations of
1
Permeability in Soils
This standard is issued under the fixed designation D8037/D8037M; 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 to guide confirmation sampling. The EC log and injection
pressure log may be compared in some settings to identify the
1.1 Thispracticedescribesamethodforrapiddelineationof
presence of ionic contaminants or ionic injectates used for
variations in formation permeability in the subsurface using an
remediation.
injection logging tool. Clean water is injected from a port on
the side of the probe as it is advanced at approximately 2cm/s 1.4 The injection logging system does not provide quanti-
into virgin soils. Logging with the injection tool is typically tative permeability or hydraulic conductivity information.
performed with direct push equipment, however other drilling However, injection pressure and flow data may be used to
machines may be modified to run the logs by direct push provide a qualitative indication of formation permeability.
methods (for example, addition of a suitable hammer and/or Semi-quantitative values of permeability may be obtained by
2
hydraulic ram systems). Injection logs exceeding 100 ft [30m] correlation of injection logging data with other methods (1-4).
depth have been obtained. Direct push methods are not Also, a log of estimated hydraulic conductivity (5) may be
intended to penetrate consolidated rock and may encounter calculated for the saturated zone using an empirical model
refusal in very dense formations or when cobbles or boulders included in some versions of the log viewing software. The
are encountered in the subsurface. However, injection logging data allows for estimates of hydraulic conductivity (K) at the
has been performed in some semi-consolidated or soft forma- inch-scale using the corrected injection pressure and flow rate.
tions.
1.5 This tool is to be used as a logging tool for the rapid
1.2 This standard practice describes how to obtain a real delineation of variations in permeability, lithology and hy-
time vertical log of injection pressure and flow rate with depth. drostratigraphy in unconsolidated formations. Direct push soil
Thedataobtainedisindicativeofthevariationsofpermeability sampling (Guide D6282) and slug testing (Practice D7242)by
in the subsurface and is typically used to infer formation means of groundwater sampling devices (Guide D6001)or
lithology. The person(s) responsible for review, interpretation direct push monitoring wells (Guide D6724 and Practice
and application of the injection logging data should be familiar D6725) may be used to validate injection log interpretation,
with the logging technique as well as the soils, geology and permeability and hydraulic conductivity estimates. Other aqui-
hydrogeology of the area under investigation. fer tests (Guide D4043) in larger wells can also be used to
obtain additional information about permeability and hydraulic
1.3 The injection logging system may be operated with a
conductivity. However, correlation of results from long
built in electrical conductivity sensor to provide additional real
screenedwellswiththefinedetailofthehydraulicinjectionlog
time information on stratigraphy and is essential for targeting
data may be difficult at best due to the effect of scale in
test zones. Other sensors, such as fluorescence detectors
measurements of transmissivity (6).
(Practice D6187), a membrane interface probe (Practice
D7352) or a cone penetration tool (Test Method D5778) may 1.6 All observed and calculated values shall conform to the
be used in conjunction with injection logging to provide guidelines for significant digits and rounding established in
additional information. The use of the injection logging tool in Practice D6026, unless superseded by this standard.
concert with an electrical conductivity array or cone penetra-
1.7 The values stated in either inch-pound units or SI units
tion tool is highly recommended (although not mandatory) to
[presented in brackets] are to be regarded separately as
further define hydrostratigraphic conditions, such as migration
standard. The values stated in each system may not be exact
pathways, low permeability zones (for example, aquitards) and
equivalents;therefore,eachsystemshallbeusedindependently
of the other. Combining values from the two systems m
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