The TISA 3D prototype is a geophysical technique for high-resolution 3D mapping of borehole surroundings. It’s a breakthrough technology with very high accuracy as it allows, for the first time, radar survey at great depths and in difficult circumstances. Applied in a single borehole, the TISA 3D combines all the advantages of ground penetrating radar tools in one:
The TISA 3D emits radar waves into the subsurface by means of a transmitter antenna, situated in the borehole. When a wave meets a contrast in material parameters (an object or geological boundary), part of it is reflected and received by the receiver antenna, situated in the same borehole. A continuous 3D image of the subsurface is obtained by rotating the antenna system and moving the TISA 3D vertically in the borehole.
T&A is responsible for the design, engineering, operating and processing software and testing. Subcontractors TNO-FEL (Physical Electronic Laboratory) and NLR (Dutch National Aerospace Laboratory) developed and built the mechanical and electronic components of the downhole tool.
T&A Survey hasdone researchinto the existing 3D Borehole Radar technology and has formulated a great number of improvements. Based on the outcome of this research, T&A decided to build a new 3D Borehole Radar. The design of the measuring-equipment is carried out in-house. The building is done partly in-house and is partly outsourced.
The first components are being manufactured. The antenna module has been completed and tested in realistic curcumstances, using boreholes at locations which are suitable for radar measurements. Based on the results of these measurments we are working on the details of the radar electronics design (transmitter and receiver), which will subsequently be manufactured.