Wave-equation time migration |
vel,zodata
Figure 1. Simple synthetic model (a) Velocity model. (b) Zero-offset data. |
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vmigwin,kpstmtime
Figure 2. (a) Time migration velocity, and (b) Image obtained by Kirchhoff time migration. |
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vdix,wetm1
Figure 3. (a) Dix velocity, and (b) Image obtained by wave-equation time migration using RTM in image-ray coordinates. All events are correctly focused in image-ray coordinates but appear in a distorted coordinate frame. |
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acoord,anamapd,zomig
Figure 4. (a) Image rays (curves of constant ) and wavefronts (curves of constant ). (b) Image obtained using wave-equation time migration after conversion to Cartesian coordinates, and (c) Image obtained using depth migration using RTM in Cartesian coordinates. |
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Wave-equation time migration |