--> Abstract: Application of the Formation MicroScanner in the Environmental Field, by J. A. Fischer, J. J. Fischer, and R. J. Bullwinkel; #90954 (1995).

Datapages, Inc.Print this page

Abstract: Application of the Formation MicroScanner in the Environmental Field

J. A. Fischer, J. J. Fischer, R. J. Bullwinkel

No matter how appropriate our contaminant transport analytical model may be or how suitable the treatment selected, the answers to developing an appropriate remediation strategy depends upon how well one can define the physical parameters of the aquifer or aquifers in question. The subsurface conditions below waste sites underlain by consolidated formations, particularly those near old continental margins or major fault zones, may be virtually impossible to evaluate with conventional geotechnical techniques and tools.

For the example described in this paper, the authors have combined conventional technology with a suite of oil field geophysical logs, to provide a more complete look at the subsurface. The sites in question are underlain by the Passaic Formation, a reddish-brown, thin- to massively- bedded, sedimentary deposit found throughout the Juro-Triassic-aged Newark Basin. The Passaic is fractured and faulted to varying degrees, and often, bedding planes are open. It is a major source of potable water in New Jersey. As it underlies a large area of the State, the formation also supports a number of waste sites.

The Formation MicroScanner was of significant use in determining orientation of bedding planes and fractures as well as identifying permeable strata, fracture apertures and relative transmissivities. In addition the Formation MicroScanner data allowed for the postulation of faults between widely spaced boreholes. Excellent comparison of the results were made with multi-well pump tests and continuous core obtained by a triple-tube, split core barrel. The results of the Formation MicroScanner interpretation yielded a much improved understanding of the subsurface.

AAPG Search and Discovery Article #90954©1995 AAPG Eastern Section, Schenectady, New York