Detection of a Target in a Rock Formation Using the Radar Fracture Mapping Tool
- Key words
- Exploration; Research Agencies; Geophysical Surveys; Sandia; Radar Fracture Mapping
- Conference
- Geothermal Resources Council Transactions
- Year
- 1988
- Session
- Geophysical surveys; Fractures; Downhole radar
- Language
- English
Abstract
A method to located fractures adjacent to but not intersecting a wellbore would be a great aid to the geothermal industry. A prototype downhole radar probe was recently compiled with the aim of locating fractures near a single wellbore. This probe, operating in the pulse mode with a bandwidth of 30 to 3000 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 steep 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.
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