Investigation of well redevelopment techniques for the MWD Well Field, Savannah River Site, South Carolina

Conference · Tue Mar 01 00:00:00 EST 1994 · Geological Society of America, Abstracts with Programs; (United States)

OSTI ID:6930757

Kroening, D E; Snipes, D S; Falta, R W; Benson, S M ^[1]; Janssen, J ^[2]

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1. Clemson Univ., SC (United States). Dept. of Earth Sciences
2. Westinghouse Savannah River Co., Aiken, SC (United States)

Clemson University, in cooperation with the Savannah River Site (SRS) is investigating well treatment techniques at the Mixed Waste Disposal (MWD) Well Field at SRS. This well field consists of fifteen wells screened in three aquifers with a downward trending head gradient. Based on aquifer performance tests of the MWD wells, it has been determined that many of the wells exhibit low well efficiencies and high skin factors, indicative of damaged wells. Bacterial investigations show that the biological activity in these wells is low, probably due to a high pH environment. Evaluation of the Calcite Saturation Index for each well indicates that nearly all of the MWD wells have the potential for precipitating calcite and calcite deposits have been observed on downhole equipment. The calcite deposits may occur due to the dissolution of the grout mixtures by waters infiltrating down the well annulus driven by the downward head gradient with subsequent precipitation of calcite in the higher pH sand pack. Well rehabilitation techniques currently under investigation include acidification, hydraulic fracturing and traditional physical methods. In addition to treating the wells at MWD, the authors plan to perform aquifer performance tests and evaluate post-treatment skin factors. Further research into the long term effects of well treatment will be conducted, focusing on long term chemical changes brought about by the treatments.

• OSTI ID: 6930757
• Report Number(s): CONF-9404221-; CODEN: GAAPBC
• Journal Information: Geological Society of America, Abstracts with Programs; (United States), Vol. 26:4; Conference: 43. annual meeting of the Southeastern Section of the Geological Society of America, Blacksburg, VA (United States), 7-8 Apr 1994; ISSN 0016-7592
• Country of Publication: United States
• Language: English

Related Subjects

12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
54 ENVIRONMENTAL SCIENCES
22 GENERAL STUDIES OF NUCLEAR REACTORS
DISPOSAL WELLS
FORMATION DAMAGE
WELL SERVICING
SAVANNAH RIVER PLANT
WASTE DISPOSAL
SITE CHARACTERIZATION
SOUTH CAROLINA
DEVELOPED COUNTRIES
MANAGEMENT
NATIONAL ORGANIZATIONS
NORTH AMERICA
US AEC
US DOE
US ERDA
US ORGANIZATIONS
USA
WASTE MANAGEMENT
WELLS
052002* - Nuclear Fuels- Waste Disposal & Storage
540250 - Environment
Terrestrial- Site Resource & Use Studies- (1990-)
220501 - Nuclear Reactor Technology- Environmental Aspects- Siting