Earth Sciences 2220A/B Study Guide - Quiz Guide: Strike And Dip, Inverse Trigonometric Functions
2 Apr 2019
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Calculate the following: the apparent dip angle ( t) of the reflection before migration. The apparent dip angle is calculated by taking the arctangent of the slope of the reflection, m, calculated by taking the rise/run. The rise in this case is simply the change in the apparent depth along the reflection segment, by converting from time to depth using the velocity of the medium. Apparent dip angle ( t) = tan-1 (slope of unmigrated data) Rise = 1. 592 0. 696 = 0. 896. Run = 2500 v = m / s. T = 51. 4o: the dip angle of the reflection after migration. Rise = 1. 592 0. 896 = 0. 696. Dip angle = tan-1 (slope of migrated data at velocity = 3500 m/s) Dip angle = tan-1 ((0. 696 x 3500) / 2240) Dip angle = 47. 4o: check the results of (b) using the migrator"s equation: Left hand side does not equal to right hand side.
