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Validation and Calibration of the SPWD-wireline Prototype for High-resolution Directional Seismic Imaging in Deep Borehole
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 3rd EAGE Workshop on Borehole Geophysics, Apr 2015, cp-447-00029
- ISBN: 978-94-6282-144-6
Abstract
The project SPWD - Seismic Prediction While Drilling intends the development of a borehole prototype which combines seismic sources and receivers in one device to improve the seismic resolution and exploration depth by the application of a phased array technique for its magnetostrictive actuator sources. Within SPWD a wireline prototype has been designed, manufactured and tested. In May and September 2013 the pressure-tightness and the hydraulic system for coupling of the SPWD-prototype were proofed successfully at the KTB Deep Crustal Lab in Windischeschenbach (Germany) up to a depth of 2100 m. In 2014 3D-seismic measurements to calibrate the prototype have been carried out in the GFZ-Underground-Lab in Freiberg. The measurements applying different wavefield amplification directions show clearly dipping reflective structures depending on the amplified direction.