Butler Slug Test Solution for Confined Aquifers

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Butler (1998)

Butler Slug Test Solution for Confined Aquifers

Description

A mathematical solution by Butler (1998) is useful for determining the hydraulic conductivity of confined aquifers. The solution accounts for inertial effects in the well and oscillatory response. Analysis involves matching a type curve to water-level displacement data collected during a slug test.

AQTESOLV for Windows provides visual and automatic methods for matching the Butler solution to slug test data. This easy-to-use and intuitive software promotes rapid and accurate determination of aquifer properties.

Assumptions

The following assumptions apply to the use of the Butler solution:

	aquifer has infinite areal extent
	aquifer is homogeneous and of uniform thickness
	aquifer potentiometric surface is initially horizontal
	pumping well is partially penetrating
	a volume of water, V, is injected or discharged from the well instantaneously
	aquifer is confined
	flow is steady

Solution Options

AQTESOLV for Windows provides the following options for the Butler solution:

	partially penetrating wells
	correction for gravel pack porosity
	correction for frictional well loss
	hydraulic conductivity anisotropy

References

Butler, J.J., Jr., 1998. The Design, Performance, and Analysis of Slug Tests, Lewis Publishers, Boca Raton, 252p.

Butler, J.J., Jr., 2002. A simple correction for slug tests in small-diameter wells, Ground Water, vol. 40, no. 3, pp. 303-307.

Zlotnik, V.A. and V.L. McGuire, 1998. Multi-level slug tests in highly permeable formations: 1. Modifications of the Springer-Gelhar (SG) model, Jour. of Hydrol., no. 204, pp. 271-282.