?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=http%3A%2F%2Fmiis.maths.ox.ac.uk%2Fmiis%2F183%2F&rft.title=Seismic+Attenuation+Problem&rft.creator=Nigam%2C+Nilima&rft.subject=Energy+and+utilities&rft.description=Seismic+imaging%2C+a+technique+in+which+the+reflections+of+a+source+seismic+wave+are+recorded+as+it+passes+through+the+earth%2C+is+a+major+tool+for+geophysical+exploration.+Seismic+imaging+can+be+used+to+reconstruct+a+profile+of+the+material+properties+of+the+earth+below+the+surface%2C+and+is+thus+widely+used+for+locating+hydrocarbons.%0A%0AThe+problem+presented+by+Husky+Energy+concerns+seismic+attenuation%3A+the+loss+of+energy+as+a+seismic+wave+propagates+through+the+earth.+As+an+exploration+tool%2C+attenuation+effects+have+only+recently+attracted+attention.+These+effects+can+prove+useful+in+two+ways%3A+as+a+means+of+correcting+seismic+data+to+enhance+resolution+of+standard+imaging+techniques%2C+and+as+a+direct+hydrocarbon+indicator.+Theoretically%2C+a+subsurface+reservoir+full+of+hydrocarbons+will+tend+to+be+acoustically+softer+than+a+porous+rock+filled+only+with+water%3B+Kumar+et+al+show+that+attenuation+is+highest+in+a+partially+fluid-saturated+rock.%0A%0AMany+physical+processes+can+lead+to+the+attenuation+of+a+seismic+trace.+In+the+present+work%2C+we+ignore+attenuation+effects+such+as+spherical+divergence+or+scattering%2C+and+concentrate+on+intrinsic+attenuation+effects+exclusively.+The+latter+are+caused+by+friction%2C+particularly+in+porous+rocks+between+fluid+and+solid+particles.%0A%0AThe+goal+of+the+workshop+was+to+find+a+means+of+computing+seismic+attenuation+from+relatively+short+windows+of+seismic+imaging+data%2C+and+particularly+be+able+to+identify+regions+of+anomalous+attenuation.&rft.date=2004&rft.type=Study+Group+Report&rft.type=NonPeerReviewed&rft.format=application%2Fpdf&rft.language=en&rft.identifier=http%3A%2F%2Fmiis.maths.ox.ac.uk%2Fmiis%2F183%2F1%2Fhusky_energy.pdf&rft.identifier=++Nigam%2C+Nilima++(2004)+Seismic+Attenuation+Problem.++%5BStudy+Group+Report%5D+++++