Using the High-Resolution Magnetic Method to Locate Abandoned Brine Wells in Hutchinson, Kansas
Jianghai Xia

Abstract
The City of Hutchinson designed seven sites with a total area of 512,000 ft2 to search for abandoned brine wells after the City researched literature of the salt mining history in Hutchinson area. A high-resolution magnetic survey was conducted on these seven sites in May 2002. Twenty-three anomalies were verified by excavation with a backhoe, of which are five were identified as brine wells, four as suspected brine wells, one probable water well, and one probable gas pipe. A monopole anomaly with more than 12,000 nT in amplitude is a basic criterion to identify a well with a metal case. A monopole anomaly with several thousand nanoteslas in amplitude is a basic criterion to identify a 2.5-inch well. The high-resolution magnetic method was successful in locating the abandoned brine wells.


Introduction
On January 17, 2001, a natural gas explosion and fire destroyed two downtown Hutchinson businesses. The next day another explosion occurred at a mobile home park three miles away. Two residents died of injuries from the explosion, which forced the evacuation of hundreds of people as gas geysers began erupting in the area. The geysers spewed a mixture of natural gas and saltwater. The pathways to the land surface at both the explosion sites and the geysers were abandoned brine wells used for solution mining of salt (http://www.kgs.ukans.edu/Hydro/Hutch/Background/index.html, Allison, 2001).
To find these abandoned brine wells is a part of the Hutchinson Response Project. Some known wells in the mobile home park had steel cased pipes. The length of vertical steel pipe normally is 400 – 700 ft. The maximum magnetic signal caused by this pipe can be higher than 15,000 nT on the top of the normal geomagnetic field in Hutchinson, Kansas (Appendix A). This huge anomaly shows promise in locating brine wells in the City noise environment.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Full Paper KGS-2002-46.PDF 4.51MB

Related Text

"Using the Electromagnetic Method to Locate Abandoned Brine Wells in Hutchinson, Kansas"
SEGEEP 2002 Presentation

"Using the Electromagnetic Method to Locate Abandoned Brine Wells in Hutchinson, Kansas"
KGS-2001-17 Abstract

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