Table
T17. A comparison of VSP check-shot data with depth
estimates derived from physical properties and logging
measurements.
VSP
depth
(mbsf)VSP
TWT
(ms)VSP
TWT
(ms bsf)Predicted
depth
(m)Error
(m)
490.10
2119.7
561.9
485.83
4.17
505.00
2135.5
577.7
502.38
2.72
532.10
2157.8
600.0
524.57
7.53
552.20
2181.7
623.9
547.17
5.03
Note: VSP two-way traveltime (TWT) is converted to two-way traveltime below seafloor (bsf) in column three for comparison to depth measurements made relative to the seafloor.