Abstract
Hydraulic fracture stress measurements have been performed through perforations at depths from 1310 to 2470 m at the U.S. Department of Energy's Multiwell Experiment site. The results of over 60 stress tests conducted through perforations have shown that small-volume hydraulic fractures generally provide an accurate, reproducible measurement of the minimum in situ stress. However, unusual behaviour can occur in some tests and techniques to evaluate the behaviour are suggested. Stress results show that the stress distribution is dependent on lithology at this site; mudstones, shales and other non-reservoir rocks generally have a near-lithostatic stress, while sandstones have a considerable lower minimum stress value.
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More From: International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts
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