High frequency electromagnetic burn monitoring for underground coal gasification

Conference · Wed Jun 17 04:00:00 EDT 1981

OSTI ID:5471701

Deadrick, F J; Hill, R W; Laine, E F

This paper describes the use of high frequency electromagnetic waves to monitor an in-situ coal gasification burn process, and presents some recent results obtained with the method. Both the technique, called HFEM (high frequency electromagnetic) probing, the HFEM hardware used are described, and some of the data obtained from the LLNL Hoe Creek No. 3 underground coal gasification experiment conducted near Gillette, Wyoming are presented. HFEM was found to be very useful for monitoring the burn activity found in underground coal gasification. The technique, being a remote sensing method which does not require direct physical contact, does not suffer from burnout problems as found with thermocouples, and can continue to function even as the burn progresses on through the region of interest. While HFEM does not replace more conventional instrumentation such as thermocouples, the method does serve to provide data which is unobtainable by other means, and in so doing it complements the other data to help form a picture of what cannot be seen underground.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5471701
• Report Number(s): UCRL-85401; CONF-810607-14; ON: DE82011056
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
COAL GASIFICATION
ELECTRICAL SURVEYS
ELECTROMAGNETIC RADIATION
ELECTROMAGNETIC SURVEYS
FEDERAL REGION VIII
GASIFICATION
GEOPHYSICAL SURVEYS
IN-SITU GASIFICATION
IN-SITU PROCESSING
MONITORING
NORTH AMERICA
PROCESSING
RADIATIONS
SURVEYS
THERMOCHEMICAL PROCESSES
USA
WYOMING