Home Work # 2 (02%)

Seismic
Resolution
In the attached seismic section, the
KFUPM1 formation overlies the KFUPM2 formation. The tops of both formations
give rise to positive reflection coefficients. The central lobe of the
zerophase pulse on this data shows up as a white reflection coefficient. At the
well location, the top of the KFUPM1 appears just below 2.65 seconds and the
top of the KFUPM2 appears just below 2.80 seconds.
Note:
KFUPM1 & KFUPM2 are not real names because of security.
1.
Estimate the time thickness of the KFUPM1 formation at the well.
How big is the possible error in your answer?
2.
What is the thickness in feet of the KFUPM1? The interval velocity is 11,500 ft/sec.
3.
What is the minimum thickness in feet
of an individual bed within the KFUPM1 that can be accurately resolved?
4.
If there were patch reefs scattered throughout this region on the KFUPM2
shelf margin, how far apart laterally would two of them have to be in order to
be able to resolve them seismically?
5.
What would be the impact on the lateral resolution if you were to migrate
this section?
The twoway traveltime and the associated average ve1ocity are:
0.7, 0.8, 0.9, 1.1, 1.3, 1.5, 1.7, 1.9, 2.1, 2.3, 2.5, 2.7, 2.85 sec
&
6.70, 6.75, 6.85, 7.2, 7.35, 7.6, 7.95, 8.35, 8.75, 9.10, 9.35, 9.60, 9.80
kft/sec.
Respectively.
GOOD LUCK