Two-well tracer test in fractured crystalline rock

  • 22 Pages
  • 4.31 MB
  • English
U.S. Government Printing Office , Washington, DC
Statementby D.S. Webster, J.F. Proctor, and I.W. Marine.
SeriesU.S. Geological Survey water-supply paper -- 1544-I, General ground-water techniques
ContributionsProctor, J.F., Marine, I.W., Geological Survey (U.S.)
The Physical Object
Paginationiv, 22 p. :
ID Numbers
Open LibraryOL20574507M

TWO-WELL TRACER TEST IN FRACTURED CRYSTALLINE ROCK By D. WEBSTER,1 J. PROCTOR,* and I. MARINE ABSTRACT A pulse injection of tritium ( curies) was made to flow from an injection well to a discharge well through fractures in crystalline rock buried beneathCited by: Get this from a library.

Two-well tracer test in fractured crystalline rock. [D S Webster; I Wendell Marine; J F Proctor; U.S. Atomic Energy Commission.; Geological Survey (U.S.); United States. Department of the Interior.]. Two-well tracer test in fractured crystalline rock Water Supply Paper I By: D.S.

Webster, J.F. Proctor, and I.W. Marine. Get this from a library. Two-well tracer test in fractured crystalline rock.

[D S Webster; I Wendell Marine; J F Proctor; U.S. Atomic Energy Commission.; Geological Survey (U.S.),]. Heterogeneous advection induced by fluid flow channeling was found to be the main solute transport process under forced-gradient tracer experiments in fractured crystal- line rocks in New.

becker and shapiro: tracer transport in fractured crystalline rock to be a reasonable approximation of the diffusion rate ex- pected for bromide, which has a diffusion rate in water near. These findings are used to develop a methodology to characterize rock matrix block size distribution in fractured aquifers and to estimate dispersivity based on a tracer test, which will improve our decisions concerning the remediation of contaminated by: 7.

Characterization of a hydraulically induced crystalline-rock fracture Article in Hydrological Processes · March with Reads How we measure 'reads'.

Some recent, converging flow, tracer tests at the Äspö Hard rock laboratory in Sweden using non-sorbing as well as sorbing tracers in fractured crystalline rocks were analysed. The hydraulic and transport properties of the fracture networks were interpreted from hydraulic tests Author: Ivars Neretnieks.

The popular notion that hydraulic and tracer tests are methods to ''measure" hydraulic and tracer properties is somewhat misleading. In reality, the analysis of a hydraulic or tracer test is a modeling exercise consisting of two steps.

The first step is to choose a model to represent flow and transport in the rock mass. Request PDF | An Unsteady State Tracer Method for Characterizing Fractures in Bedrock Wells | Evaluating contaminants impacting wells in fractured crystalline rock requires knowledge of the.

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.

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. Geophys.

Res., 86 (NB8) (), pp. Google Cited by: 7. A unique infiltration tracer experiment was performed whereby a fluorescent dye was applied to the land surface in an agricultural field, near Perth, Ontario, Canada, to simulate the transport of solutes to two pumped monitoring wells drilled into the granitic gneiss by: Two-well tracer test in fractured crystalline rock.

U.S. Geol. Survey Water Supply PaperWashington D.C. Google Scholar White, K.E. () Dispersion in surface by: 3.

In this chapter we examine heat transfer during forced water circulation through fractured crystalline rock using a fully 3-D finite-element model.

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We propose an alternative to strongly simplified single or multiple parallel fracture models or porous media equivalents on the one hand, and to structurally complex stochastic fracture network Author: Olaf Kolditz.

Use of hydraulic tests at different scales to characterize fracture network properties in the weathered‐fractured layer of a hard rock aquifer, Water Resources Research, 40, 11, ()., Analysis of flow dimension from a pumping test in a karst aquifer, Carbonates and Evaporites, /s, ().Cited by: The findings and recommendations are not necessarily limited to fractured crystalline rock formations; many apply to fractured subsurface formations in general.

Experimental Field Site Studies were conducted at the Raymond Field Site, which is operated by the E. Lawrence Berkeley National Laboratory and the U.S.

Geological Survey. Comprehensive geological dataset for a fractured crystalline rock volume at the Grimsel Test Site Tracer based characterization of the connected fracture volume in the DUG Lab at the Grimsel Test Site Contribution to a book, Poster () High-resolution cross-borehole thermal tracer testing in granite: preliminary field results.

Characterizing Hydraulic Properties and Ground-Water Chemistry in Fractured-Rock Aquifers: A User's Manual for the Multifunction Bedrock-Aquifer Transportable Testing Tool (BAT3). Geological Survey (U.S.) Open-File Reportix, p. Conduct research on fluid flow and solute transport in fractured rocks, hydraulic and tracer testing, computer simulation and visualization, groundwater resources in bedrock terrain, poroelasticity analysis of fluid-stress interaction and subsurface deformation, induced seismicity from fluid injection.

Use of open wells to conduct aquifer tests in fractured crystalline rock aquifers is potentially problematic, because open wells can hydraulically connect highly permeable fracture zones at different depths within the rock. Because of this effect, it is questionable whether estimates of the hydraulic properties of the rock obtained from analysis of an open-well aquifer test in fractured.

The usual conceptual model of flow and solute transport through fractured rock with low matrix permeability involves solute advection and dispersion through a fracture network coupled with diffusion and sorption into the surrounding rock matrix.

Description Two-well tracer test in fractured crystalline rock PDF

Unlike two-well tracer tests, results of SWIW tests are ideally independent of advective. Nov 15,  · [1] Investigations of solute transport in fractured rock aquifers often rely on tracer test data acquired at a limited number of observation points.

Such data do not, by themselves, allow detailed assessments of the spreading of the injected tracer plume. To better understand the transport behavior in a granitic aquifer, we combine tracer test data with single‐hole ground‐penetrating radar Cited by: Tracer tests in fractured rocks with a new fluorescent dye NaSO 3 NaOH NaSO 3 NaSO 3 NaSO3 NaSO 3 NaSO3 NaSO3 Fig.

1 Chemical structure of (a) pyranine and (b) the new fluorescent tracer pyrene- 1,3,6,8-tetra sulphonic acid (PTS). The field tests. Becker, M.W. and A. Shapiro, Interpreting breakthrough tailing and matrix diffusion from different forced-gradient tracer test configurations in fractured crystalline bedrock, Extended Abstract in Conference Proceedings for Fractured Rock Meeting, Toronto, Canada, March fractured crystalline rock with low matrix permeability, such as surface surveys, well logging, hydrologic tests, and tracer tests.

Hydrologic tests can involve one or multiple A typical two-well (TW) tracer test known as a convergent radial test involves injection of a pulse of tracer at a small flow rate into one well, while a nearby well Cited by: 3.

select article Interpretation of Some In-Situ Tracer Experiments in Fractured Crystalline Rock at Äspö Hard Rock Laboratory Book chapter Full text access Interpretation of Some In-Situ Tracer Experiments in Fractured Crystalline Rock at Äspö Hard Rock Laboratory Analysis of the Hydraulic Interaction Between Clay Buffer and Host Rock.

Tracer transport in fractured crystalline rock: Evidence of nondiffusive breakthrough tailing Matthew W. Becker Department of Geology, State University of New York at Buffalo Allen M.

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Shapiro U.S. Geological Survey, Reston, Virginia Abstract. Extended tailing of tracer breakthrough is often observed in pulse injection tracer tests conducted in.

The experiment attempted to define: the radius of influence of a pressure pulse-test in fractured rock and the correlation between pressure-pulse tests and steady-state flow tests performed in five boreholes drilled in fractured granite.

Twenty-five test intervals, 2 to 3 m in length, were isolated in the boreholes, using air-inflated packers. Sep 19,  · The paper is intended to define a benchmark problem related to groundwater flow and natural tracer transport using observations of discharge and isotopic tracers in fractured, crystalline rock.

Three numerical simulators: Flowd, OpenGeoSys, and PFLOTRAN are by: 3.Because the continuum approach is relatively simple and straightforward to implement, it has been commonly used in modeling flow and transport in unsaturated fractured rock.

However, the usefulness of this approach can be questioned in terms of its adequacy for representing fingering flow and transport in unsaturated fractured rock.The objective of this study was to demonstrate and evaluate new experimental methods for quantifying the potential for actinide transport in deep fractured crystalline rock formations.

We selected a fractured granodiorite at the Grimsel Test Site (GTS) in Switzerland as a model system because field experiments have already been conducted with Cited by: 4.