{"title":"Diffraction Amplitude for Fractures Imaging & Hydrocarbon Prediction","authors":"Y. Bashir, D. Ghosh, C. Sum","doi":"10.9790/0990-0503015059","DOIUrl":null,"url":null,"abstract":"Seismic diffractions are often considered as noise and have been suppressed during processing intentionally or implicitly. Diffraction hyperbola actually have the information of discontinuity such as fault, fracture, Karst and edge of salt flanks, which always contain valuable information for geological interpretation and reservoir modeling. These diffractions play an important role to illuminate the small scale events which are crucial for structural traps such as fractured reservoir. Another important part of diffraction is to improve the amplitude recovery at the certain point through diffraction summation. These diffracted waves have been recognized as physically reliable carriers of high and even super-resolution structural information. This research work illustrates the different behavior of diffraction hyperbola comparing with different velocities and depths. Phase change in amplitude in 180 0 from +ive to –ive and the decay in amplitudes directly proportional to the angle of incident. Synthetic data set is used for the analysis of amplitude preservation through diffraction imaging. Outcome of the research demonstrate the consideration of diffraction imaging for discontinuities, complex structure and small scale reservoir imaging, which subsidize a good impact to search the hydrocarbon potential reserves. Another aspect is cover that describes the importance of migration aperture selection for integration of the diffractions on the basis of frequency of the data, as high frequency will produce less diffraction response then low frequency. Last but not least, the diffraction imaging improves the spatial resolution of individual faults and fracture below the resolution of reflections.","PeriodicalId":111900,"journal":{"name":"IOSR Journal of Applied Geology and Geophysics","volume":"15 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IOSR Journal of Applied Geology and Geophysics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.9790/0990-0503015059","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 3
Abstract
Seismic diffractions are often considered as noise and have been suppressed during processing intentionally or implicitly. Diffraction hyperbola actually have the information of discontinuity such as fault, fracture, Karst and edge of salt flanks, which always contain valuable information for geological interpretation and reservoir modeling. These diffractions play an important role to illuminate the small scale events which are crucial for structural traps such as fractured reservoir. Another important part of diffraction is to improve the amplitude recovery at the certain point through diffraction summation. These diffracted waves have been recognized as physically reliable carriers of high and even super-resolution structural information. This research work illustrates the different behavior of diffraction hyperbola comparing with different velocities and depths. Phase change in amplitude in 180 0 from +ive to –ive and the decay in amplitudes directly proportional to the angle of incident. Synthetic data set is used for the analysis of amplitude preservation through diffraction imaging. Outcome of the research demonstrate the consideration of diffraction imaging for discontinuities, complex structure and small scale reservoir imaging, which subsidize a good impact to search the hydrocarbon potential reserves. Another aspect is cover that describes the importance of migration aperture selection for integration of the diffractions on the basis of frequency of the data, as high frequency will produce less diffraction response then low frequency. Last but not least, the diffraction imaging improves the spatial resolution of individual faults and fracture below the resolution of reflections.