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Wednesday, February 12, 2020 | History

2 edition of Two-well tracer test in fractured crystalline rock found in the catalog.

Two-well tracer test in fractured crystalline rock

D. S. Webster

Two-well tracer test in fractured crystalline rock

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  • 13 Currently reading

Published by U.S. G.P.O. in Washington, D.C .
Written in English

    Subjects:
  • Radioactive tracers in hydrogeology.,
  • Tritium.

  • Edition Notes

    Bibliography: p. 22.

    Statementby D.S. Webster, J.F. Proctor and I.W. Marine ; work done in cooperation with the U.S. Atomic Energy Commission.
    SeriesGeological Survey water-supply paper -- 1544-I, General ground-water techniques
    ContributionsMarine, I. Wendell 1927-, Proctor, J. F., U.S. Atomic Energy Commission., Geological Survey (U.S.)
    The Physical Object
    Paginationiv, 22 p. :
    Number of Pages22
    ID Numbers
    Open LibraryOL22968777M

    Anionic tracers travel with the water but cationic tracer undergo chemical exchange with cations on the surface of the rock. AGU, 84 46Fall Meet. Geothermics, 23 273— Fluid conductivity logging was performed in seven wells, and straddle-packer injection tests were conducted in all nine wells. This eliminates the need to perform a separate pumping test. Fact Sheet2 p.

    Responses with reduced magnitude also occurred in the upper open hole interval above the test section. This result generally points out the shortcomings of using the convection-dispersion equation to model transport in highly heterogeneous fracture rock. Anionic tracers travel with the water but cationic tracer undergo chemical exchange with cations on the surface of the rock. Of particular importance are the following five parameters; the source configuration, the thermal conduction in the matrix, the velocity of fluid in the fracture, the aperture of the fracture, and the thermal dispersion in the fracture. Rock discoloration around individual fractures could be seen, and therefore helped locate fractures that might be hydrologically altered. Clays and ferric oxides associated with hydraulically altered fractures exhibit high electrical conductivities compared to the parent rock.

    Despite the similarities, differences in the amount of weathering, the structural style and the amount of organic carbon present meant that the contaminant fate and transport at each site is completely different. Spernyak, Magnetic resonance imaging of dense and light non-aqueous phase liquid in a rock fracture, Paper No. These ranges were further constrained when the DFN models were calibrated to tracer breakthrough data using postprocessors to numerically include the effects of dispersion and matrix diffusion. Additionally, the hydraulic properties estimated from typical field methods generally reflect near borehole conditions, which may or may not be representative of dominant flow pathways in the larger aquifer system. A discrete-fracture model could be fitted best to the observed breakthrough curves.


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Two-well tracer test in fractured crystalline rock by D. S. Webster Download PDF Ebook

Shapiro, Effect of cell physicochemical characteristics and motility on bacterial transport in groundwater, J. Selected Publications Shapiro, A. Extensive groundwater monitoring and sampling of the monitor well arrays was completed to establish vertical and horizontal gradients between the two aquifers and groundwater flow direction across the landfills.

Becker, J. Matrix domain discharge was evaluated indirectly by measurement of the increase in canal discharge along segments with no significant individual inflow features Hokr et al.

It provides a means to identify and quantify the transmissivities of onlythe relatively few fractures orfracture zones which are in fact conductive.

Isotopic Tracers for Obtaining Hydrologic Parameters

Regions of resistivity less than ohm-m are associated with hydraulically conductive fractures. A schematic Two-well tracer test in fractured crystalline rock book the new data acquisition system is shown in Figure 4. Two subhorizontal fracture zones comprised of the westwardly dipping, subhorizontal altered fractures and pegmatites were delineated based on similarities in fracture geophysical properties in adjacent boreholes.

The degree of separation is indicative of the surface area exposed to the tracer. Figure 5c shows the downward logs forwell SE IAEA, Vienna, — This made the interpretation of some portions of some logs difficult.

Observation of drill cuttings, drilling rate, and flow out of the borehole during drilling may be used to infer lithology and the location of transmissive fractures, for example. By integrating the well package with dfnWorks, multiple conceptual models were developed to simulate flow and transport in subsurface fractured rocks downgradient from the BULLION test.

All ninewellswere profiled with a thermal-pulse flowmeter. As described subsequently, the relevance of this parameter is very questionable. Location of Raymond Field Site The conceptual model of the site subsurface is based on the integration of all work conducted at the site. Benchmark models configuration The conceptual model is based on the general situation in Figs.

The integration of various geophysical logs is an essential component in any characterization effort.Two-well tracer test in fractured crystalline rock: U.S. Geological Survey Water Supply Paper ,24 p. Hydrology of buried crystalline rock at the Savannah River Plant near Aiken, South. Evaluation of inert tracers in a bedrock fracture using ground penetrating radar and thermal sensors Inert tracer tests in two well-pairs suggested identical fluid volumes.

R.M. PotterEnergy extraction from fractured geothermal reservoirs in low-permeability crystalline rock. J. Geophys. Res., 86 (NB8) (), pp. Google Cited by: 7. Two tracer experiments were conducted in a horizontally fractured shale to demonstrate the application of the new analytical models.

Experiments were conducted with observation wells of finite volume and using a new sampling packer which eliminates the volume of the observation well.Two-well tracer pdf in fractured crystalline rock. U.S. Geol. Survey Water Supply PaperWashington D.C. Google Scholar White, K.E. () Dispersion in surface galisend.com by: 3.Two tracer experiments were conducted in a horizontally fractured shale to demonstrate the application of the new analytical models.

Allen M Shapiro, Ph.D.

Experiments were conducted with observation wells of finite volume and using a new sampling packer which eliminates the volume of the observation well.Becker, M.W.

and A. M. Shapiro, Interpreting breakthrough tailing and ebook diffusion from different forced-gradient tracer test configurations in fractured crystalline bedrock, Extended Abstract in Conference Proceedings for Fractured Rock Meeting, Toronto, Canada, March