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Migration Resolution

Migration Resolution. Fresnel Zone. T/2. L.  z. 2. L. z. ZO Migration Smear Reflections along Fat Circles. . . r s. + T. r s. o. 1-way time. r. x. s. . 2. 2. (x- x ) + y. =. d( x , ). s. r s. 2 c. s. ZO Migration

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Migration Resolution

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  1. Migration Resolution

  2. Fresnel Zone T/2 L  z 2 L z

  3. ZO Migration Smear Reflections along Fat Circles   rs + T rs o 1-way time r x s  2 2 (x-x ) + y = d(x , ) s rs 2c s

  4. ZO Migration Smear Reflections along Fat Circles  rs & Sum  1-way time x d(x , ) s

  5. ZO Migration Smear Reflections along Circles  rs & Sum  1-way time r d(x , ) s

  6. ZO Migration Resolution Intersection of Fresnel Zones Intersection of Fresnel Zones Vertical Res. = Near-Offset Traces

  7. ZO Migration Resolution Intersection of Fresnel Zones Intersection of Fresnel Zones Horiz. Res. = Far-Offset Traces

  8. Why is Pt. Scatterer Response of Migration a Blurred Version of Point? Lr d = Lr but Migration: Migration Section = Blured Imageof r Migrated Section Data T m = L d

  9. 0 km 3 km 0 km 7 km

  10. T -1 T m = (L L) L d x T • ZO Migration: m = L d Smear reflections along fat circles ..  d(x, ) m(x’) = xx’ T • m = (L L) r A(x,x’) Conclusions LSM: • Far-Offset Traces = Better Hor. Res. • Near-Offset Traces = Better Vert. Res.

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