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Title: Detection of a target in a rock formation using the radar fracture mapping tool

Abstract

A method to locate fractures adjacent to, but not intersecting, an uncased wellbore would be a great aid to the geothermal industry. A prototype downhole radar probe was recently completed with the aim of locating fractures near a single wellbore. This probe, operating in the pulse mode with a bandwidth of 30 to 300 MHz, contains two identical directional antennas. As with any prototype instrumentation, extensive field work is required to completely understand the characteristics of the system. A first step in that understanding is to operate the instrument under known or controlled conditions. In this paper, some tests of the radar probe in a travertine quarry using a known target are reported. In the tests, the target is clearly detected from a borehole located 14 ft away. 12 refs., 5 figs., 1 tab.

Authors:
; ; ;
Publication Date:
Research Org.:
Sandia National Labs., Albuquerque, NM (USA)
OSTI Identifier:
6969969
Report Number(s):
SAND-88-1582C; CONF-881045-1
ON: DE88012394
DOE Contract Number:  
AC04-76DP00789
Resource Type:
Conference
Resource Relation:
Conference: Annual meeting of the Geothermal Resources Council, San Diego, CA, USA, 9 Oct 1988; Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
15 GEOTHERMAL ENERGY; 42 ENGINEERING; 58 GEOSCIENCES; GEOLOGIC FRACTURES; MAPPING; RADAR; PERFORMANCE TESTING; ANTENNAS; BOREHOLES; ELECTRIC CONDUCTIVITY; EXPERIMENTAL DATA; FLUID FLOW; GEOTHERMAL ENERGY; GEOTHERMAL EXPLORATION; CAVITIES; DATA; ELECTRICAL EQUIPMENT; ELECTRICAL PROPERTIES; ENERGY; ENERGY SOURCES; EQUIPMENT; EXPLORATION; GEOLOGIC STRUCTURES; INFORMATION; MEASURING INSTRUMENTS; NUMERICAL DATA; PHYSICAL PROPERTIES; RANGE FINDERS; RENEWABLE ENERGY SOURCES; TESTING; Geothermal Legacy

Citation Formats

Duda, L E, Uhl, J E, Gabaldon, J, and Chang, Hsi-Tien. Detection of a target in a rock formation using the radar fracture mapping tool. United States: N. p., 1988. Web.
Duda, L E, Uhl, J E, Gabaldon, J, & Chang, Hsi-Tien. Detection of a target in a rock formation using the radar fracture mapping tool. United States.
Duda, L E, Uhl, J E, Gabaldon, J, and Chang, Hsi-Tien. Fri . "Detection of a target in a rock formation using the radar fracture mapping tool". United States. https://www.osti.gov/servlets/purl/6969969.
@article{osti_6969969,
title = {Detection of a target in a rock formation using the radar fracture mapping tool},
author = {Duda, L E and Uhl, J E and Gabaldon, J and Chang, Hsi-Tien},
abstractNote = {A method to locate fractures adjacent to, but not intersecting, an uncased wellbore would be a great aid to the geothermal industry. A prototype downhole radar probe was recently completed with the aim of locating fractures near a single wellbore. This probe, operating in the pulse mode with a bandwidth of 30 to 300 MHz, contains two identical directional antennas. As with any prototype instrumentation, extensive field work is required to completely understand the characteristics of the system. A first step in that understanding is to operate the instrument under known or controlled conditions. In this paper, some tests of the radar probe in a travertine quarry using a known target are reported. In the tests, the target is clearly detected from a borehole located 14 ft away. 12 refs., 5 figs., 1 tab.},
doi = {},
url = {https://www.osti.gov/biblio/6969969}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {1}
}

Conference:
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