More reliable shear-wave data from VSPs using the CIPHER technique

Autor:	H.A.K. Edelman, T. Gut, E. Luschen, W. Sollner
Rok vydání:	1994
Předmět:	Regional geology Shear waves Seismic anisotropy Geophysics Shear (geology) Engineering geology Geophone Economic geology Igneous petrology Seismology Geology
Zdroj:	First Break. 12
ISSN:	1365-2397 0263-5046
DOI:	10.3997/1365-2397.1994009
Popis:	It has long been recognized that fracture systems in rocks can significantly influence the flow of fluids in the subsurface. The observation of seismic shear waves, recorded with three-component multilevel geophones in boreholes, provides information on seismic anisotropy, which may be caused primarily by preferred orientations of microcracks (Crampin 1986). However, as a complementary tool to standard P-wave vertical seismic profiles (VSPs) (Hardage 1985; CasselI 1984), shearwave VSPs with horizontal vibrators require additional survey time and processing costs.
Databáze:	OpenAIRE
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