Permeability and alteration within the Soultz granite inferred from geophysical and flow log analysis.
作者： Judith Sausse , Mostafa Fourar , Albert Genter
DOI: 10.1016/J.GEOTHERMICS.2006.07.003
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摘要: The 1993 stimulation tests carried out in well GPK1 at Soultz, Alsace, France, showed that of the thousands fractures cross-cutting granite, only a limited number natural contributed to fluid flow. A comparison between petrophysical properties rock and interpretation hydraulic test results is proposed as means determining distribution permeable fractures. Gamma-ray spectral logs other geophysical (caliper, bulk density, P-wave slowness, photoelectric factor) revealed some petrographical variations within Soultz massive altered/fractured zones act preferential pathways for flow indicated by logs. Fluid losses during circulation have been estimated on basis statistical analysis gamma-ray readings, potassium thorium contents.
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