Borehole radar interferometry revisited

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Abstract

Single-hole, multi-offset borehole-radar reflection (SHMOR) is an effective technique for fracture detection. However, commercial radar system limitations hinder the acquisition of multi-offset reflection data in a single borehole. Transforming cross-hole transmission mode radar data to virtual single-hole, multi-offset reflection data using a wave interferometric virtual source (WIVS) approach has been proposed but not fully demonstrated. In this study, we compare WIVS-derived virtual single-hole, multi-offset reflection data to real SHMOR radar reflection profiles using cross-hole and single-hole radar data acquired in two boreholes located at the University of Connecticut (Storrs, CT USA). The field data results are similar to full-waveform numerical simulations developed for a two-borehole model. The reflection from the adjacent borehole is clearly imaged by both the real and WIVS-derived virtual reflection profiles. Reflector travel-time changes induced by deviation of the two boreholes from the vertical can also be observed on the real and virtual reflection profiles. The results of this study demonstrate the potential of the WIVS approach to improve bedrock fracture imaging for hydrogeological and petroleum reservoir development applications.

Additional publication details

Publication type Conference Paper
Publication Subtype Conference Paper
Title Borehole radar interferometry revisited
DOI 10.1109/ICGPR.2014.6970491
Year Published 2014
Language English
Publisher IEEE
Contributing office(s) OGW Branch of Geophysics, Toxic Substances Hydrology Program
Larger Work Type Book
Larger Work Subtype Conference publication
Larger Work Title Proceedings of the 15th International Conference on Ground Penetrating Radar