1986
DOI: 10.1190/1.1439199
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Estimating the internal structure of reservoirs with shear‐wave VSPs

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Cited by 65 publications
(46 citation statements)
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“…The breakthrough in studies of anisotropy in the Earth came when theoretical studies [1,[13][14][15][16] demonstrated that stress-aligned shear-wave splitting was the most diagnostic phenomenon for recognising anisotropy in cracked rocks, and such stress-aligned shear-wave splitting was commonly observed in the Earth [2,3,17,18]. Shear-wave splitting, analogous to the birefringence of light in crystals, occurs when shear waves enter a system of aligned cracks.…”
Section: Background Of Seismic Anisotropy In Geosciencementioning
confidence: 99%
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“…The breakthrough in studies of anisotropy in the Earth came when theoretical studies [1,[13][14][15][16] demonstrated that stress-aligned shear-wave splitting was the most diagnostic phenomenon for recognising anisotropy in cracked rocks, and such stress-aligned shear-wave splitting was commonly observed in the Earth [2,3,17,18]. Shear-wave splitting, analogous to the birefringence of light in crystals, occurs when shear waves enter a system of aligned cracks.…”
Section: Background Of Seismic Anisotropy In Geosciencementioning
confidence: 99%
“…This minimum is observed in the Earth (Fig. 4) with almost identical parameters in a vast range of sedimentary, igneous, and metamorphic rocks of different porosity, geology, and tectonic history [17][18][19][20][21]. APE is tightly constrained with no free parameters yet appears to approximately match a range of some 15-20 different phenomena and millions of individual observations [5,6,35].…”
Section: Major Advances: Critical Systems and Ape-modellingmentioning
confidence: 99%
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“…Since shear-wave splitting in industrial seismic exploration reflection and VSP surveys was first recognized (Crampin, 1985;Crampin et al, 1986a;Alford, 1986), shear-wave splitting in sedimentary rocks has usually been assumed to be caused by stressaligned cracks and low aspect-ratio pores, although the dimensions of the cracks is in question. Mueller (1991) and many reports from the Reservoir Characterization Project, Colorado School of Mines (reviewed by Davis, 1995) suggest that pronounced shear-wave splitting is caused by large aligned-cracks.…”
Section: Introductionmentioning
confidence: 99%
“…The effects of fracturing on seismic wave propagation have been widely studied (O'Connell and Budiansky, 1974Crampin, et al, 1986, Schoenberg and Sayers, 1995, Pyrak-Nolte, et al, 1990) with one of the more significant effects being shear-wave splitting (also called shear-wave birefringence). Nine-component VSP'S (3 component sources and 3 component receivers) provide an excellent method of measuring shear-wave splitting , Daley, et al, 1988, Daley and McEvilly, 1990, Winterstein and Meadows, 1991.…”
Section: Introductionmentioning
confidence: 99%