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Title: Electromagnetic wave method for mapping subterranean earth formations

Abstract

The present invention is directed to a method for remotely mapping subterranean coal beds prior to and during in situ gasification operations. This method is achieved by emplacing highly directional electromagnetic wave transmitters and receivers in bore holes penetrating the coal beds and then mapping the anomalies surrounding each bore hole by selectively rotating and vertically displacing the directional transmitter in a transmitting mode within the bore hole, and thereafter, initiating the gasification of the coal at bore holes separate from those containing the transmitters and receivers and then utilizing the latter for monitoring the burn front as it progresses toward the transmitters and receivers.

Inventors:
 [1];  [1];  [1]
  1. Morgantown, WV
Issue Date:
Research Org.:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
OSTI Identifier:
862913
Patent Number(s):
4045724
Assignee:
United States of America as represented by United States Energy (Washington, DC)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01V - GEOPHYSICS
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
electromagnetic; wave; method; mapping; subterranean; earth; formations; directed; remotely; coal; beds; prior; situ; gasification; operations; achieved; emplacing; highly; directional; transmitters; receivers; bore; holes; penetrating; anomalies; surrounding; selectively; rotating; vertically; displacing; transmitter; transmitting; mode; thereafter; initiating; separate; containing; utilizing; latter; monitoring; burn; front; progresses; bore holes; gasification operation; magnetic wave; situ gasification; coal bed; earth formations; earth formation; subterranean earth; electromagnetic wave; selectively rotating; burn front; subterranean coal; coal beds; gasification operations; wave method; holes penetrating; situ gas; mapping subterranean; /324/

Citation Formats

Shuck, Lowell Z, Fasching, George E, and Balanis, Constantine A. Electromagnetic wave method for mapping subterranean earth formations. United States: N. p., 1977. Web.
Shuck, Lowell Z, Fasching, George E, & Balanis, Constantine A. Electromagnetic wave method for mapping subterranean earth formations. United States.
Shuck, Lowell Z, Fasching, George E, and Balanis, Constantine A. Sat . "Electromagnetic wave method for mapping subterranean earth formations". United States. https://www.osti.gov/servlets/purl/862913.
@article{osti_862913,
title = {Electromagnetic wave method for mapping subterranean earth formations},
author = {Shuck, Lowell Z and Fasching, George E and Balanis, Constantine A},
abstractNote = {The present invention is directed to a method for remotely mapping subterranean coal beds prior to and during in situ gasification operations. This method is achieved by emplacing highly directional electromagnetic wave transmitters and receivers in bore holes penetrating the coal beds and then mapping the anomalies surrounding each bore hole by selectively rotating and vertically displacing the directional transmitter in a transmitting mode within the bore hole, and thereafter, initiating the gasification of the coal at bore holes separate from those containing the transmitters and receivers and then utilizing the latter for monitoring the burn front as it progresses toward the transmitters and receivers.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1977},
month = {1}
}

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