MIGRATION FROM TOPOGRAPHY: IMPROVING THE NEAR-SURFACE IMAGE SAMUEL
MIGRATION FROM TOPOGRAPHY: IMPROVING THE NEAR-SURFACE IMAGE SAMUEL
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发表时间：
2004
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通讯作者：
H. Gray;K. Marfurt
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作者：
H. Gray;K. Marfurt
I” ln”“ntainO”S meas, such ai tile foothills of tile Canadian Rwkira. careful processing of near~surface seismic dam is essential. for withour an accurate interpretation of the near surface. a reliable map of the deeper reflectors ii unlikely. Although statics corrections are the primary focus Of BLtrnti”” fur near-surface imaging in muuniiii”O”S alEi\, “thel factors can atso affect tile quality of the imagr near the earth’s surface. In this paper, we investigate the effec& of niigretion amplitudes on imaging quality. We use a synthetic seismic *ata se, Lhat rnmkli the geology of nartixastrm British Columbia to test the application of Kirchhoff depth migration directly tbm an ivqular surface. we show that the near~sutiacs image obtained using emigration wrights referenced to the recording surface is significanrly belter lhan une obtained using migration wrights referenced 1” a t,at datum above the surface. In addition, prestack migra. Lion velocity analysis. used to eslimatr vrlwitieb for accurate imaging. is more inlrrpretable when the migrarion wrights arc referenced to the reconling surf.ice.
