Results from using the CSAMT technique to monitor the Tono UCG experiment

Journal Article · Tue Jan 01 04:00:00 EST 1985 · In Situ; (United States)

OSTI ID:6411734

Bartel, L C; Davidson, G S; Jacobson, R D; Uhl, J E

The controlled source audio-frequency magnetotelluric (CSAMT) surface electromagnetic geophysical technique was used to monitor the Tono project partial seam CRIP UCG (controlled retracting injection point underground gasification) test conducted on the WIDCO mine property near Centralia, Washington. The results of the monitoring show a changing resistivity pattern with time indicative of a changing process. The process boundary determined using the CSAMT technique agrees very well with the process boundary determined from the limited thermal data coupled with the mass balance calculations and post-test coring. The CSAMT measured resistivities respond to the movement of water during dewatering. The dewatering boundary appears to be influenced by geologic barriers such as faults and fractures and the dewatering boundary appears to determine the ultimate process boundary.

• Research Organization: Sandia National Laboratories, Albuquerque, New Mexico
• OSTI ID: 6411734
• Journal Information: In Situ; (United States), Journal Name: In Situ; (United States) Vol. 9:3; ISSN ISOMD
• Country of Publication: United States
• Language: English

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