Experimente zur seismischen Nutzung des Bohrgeraeusches an der Kontinentalen Tiefbohrung der Bundesrepublik Deutschland (KTB)

BITSEIS experiments conducted at the Ruhr-Universitaet Bochum are designed in connection with the KTB (continental deep drilling) program to use ultra-deep (7.000-9.000 m) rotary drill-bit noise in the crystalline as a source for seismic profiling. Methods of measurement and analysis of drill bit vibration data are discussed. Vibrations induced by the bit in a direct way could not be unambiguously identified. Seismic events were only observed during impact-shear experiments. For improved signal-noise relations an advanced data processing is proposed in connection with measurements at high frequencies and reduced depth of drilling. (WEN)SIGLEAvailable from TIB Hannover: RN 2688(43) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman