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ASTM D4630-19
Standard Test Method for Determining Transmissivity and Storage Coefficient of Low-Permeability Rocks by In Situ Measurements Using the Constant Head Injection Test
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NORM herausgegeben am 1.2.2019
Informationen über die Norm:
Bezeichnung normen: ASTM D4630-19
Ausgabedatum normen: 1.2.2019
SKU: NS-936793
Zahl der Seiten: 8
Gewicht ca.: 24 g (0.05 Pfund)
Land: Amerikanische technische Norm
Kategorie: Technische Normen ASTM
Kategorie - ähnliche Normen:
Die Annotation des Normtextes ASTM D4630-19 :
Keywords:
borehole, constant head testing, faultzones, field testing, flow, flow and flow rate, in situ, permeability, pressure testing, rock, saturation, storativity, transmissivity, viscosity, water, water saturation,, ICS Number Code 07.060 (Geology. Meteorology. Hydrology)
Ergänzende Informationen
| Significance and Use |
|
5.1 Test Method—The constant pressure injection test method is used to determine the transmissivity and storativity of low-permeability formations surrounding packed-off intervals. Advantages of the method are: (5.2 Analysis—The transient water flow rate data obtained using the suggested test method are evaluated by the curve-matching technique described by Jacob and Lohman (1)4 and extended to analysis of single fractures by Doe et al. Note 2: 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/sampling/inspection/etc. Users of this standard are cautioned that compliance with Practice D3740 does not in itself assure reliable results. Reliable results depend on many factors; Practice D3740 provides a means of evaluating some of those factors. Note 3: The function of wells in any unconfined setting in a
fractured terrain might make the determination of k problematic
because the wells might only intersect tributary or subsidiary
channels or conduits. The problems determining the k of a channel
or conduit notwithstanding, the partial penetration of tributary
channels may make determination of a meaningful number difficult.
If plots of k in carbonates and other fractured settings are made
and compared, they may show no indication that there are conduits
or channels present, except when with the lowest probability one
maybe intersected by a borehole and can be verified, such problems
are described by Worthington 1.1 This test method covers a field
procedure for determining the transmissivity and storativity of
geological formations having permeabilities lower than
10−3 μm2 (1 millidarcy) using constant head
injection.
1.2 The transmissivity and storativity values determined by this test method provide a good approximation of the capacity of the zone of interest to transmit water, if the test intervals are representative of the entire zone and the surrounding rock is fully water-saturated. 1.3 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. Reporting of test results in units other than SI shall not be regarded as nonconformance with this standard. Note 1: 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 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. |
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