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Estimate of the Aperture of Watersaturated Fractures by Nuclear Magnetic Resonance Logging
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Near Surface 2004 - 10th EAGE European Meeting of Environmental and Engineering Geophysics, Sep 2004, cp-10-00072
Abstract
P008 ESTIMATE OF THE APERTURE OF WATER- SATURATED FRACTURES BY NUCLEAR MAGNETIC RESONANCE LOGGING Abstract 1 Nuclear magnetic resonance (NMR) well logging is a technique to measure the transport properties of fluid-saturated porous strata by analyzing the proton NMR signals from the hydrogen-bearing fluid molecules. We applied the technique to a borehole in an andesite lava formation (Akita Japan) to estimate the aperture of fractures embedded in the lava. A fracture (depth 61.2 m) responsible for the total loss of circulation during the drilling was scanned by a Schlumberger NMR sonde to obtain the bulk-fluid porosity of the fracture filled