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3D , , (DC) . 3D Petrel.
Petrel . Models Petrel Explorer.
1. Make Velocity Model ( Geophysics) Process Diagram, .
2. , , . 5 , .
3. Intervals Velocity Model :
a. Create new Velocity Model convert from TWT (time) to Z (Depth).
b. Mean Sea Level Datum.
c. Petrel Explorer Input Seabed time surface Velocity Data. Seabed surface Bottom, Surface.
d. Horizon 3D time grid. (Base Cretaceous) - Bottom. Multiple drop , , .
4. Correction, (Well Tops). , .
5. Well Tops Input tab , , ( ).
: Well tops folder Spreadsheet. , Correction Used in Depth Conversion Spreadsheet!
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6. Model (V=V0), Datum Seabed. 1480 m/s. Linvel (V=V0+K*Z) .
7. , V0 . Velocity Data Input. .
8. , . :
a) Base Cretaceous: 0.4
b) Top Tarbert: - 0.22
c) Top Ness: -0.23
d) Top Etive: -0.11
9. Output. - Well Report. Time and velocity logs Residual points at well tops (Final velocity model).
10. Advanced Well velocity Clip Vo (Min. 1150 Max. 5500). , 1000 (Use radius) Clip K Ignore values outside limits.
11. Apply. Models Models First Petrel Explorer. (Global well logs), Well Tops, Attributes.
3D
.. , , 3D .
1. , 3D ( ) .
2. Depth Convert 3D Grid (Structural modelling) Process diagram ( Make Horizons).
3. Velocity Model 1 (, ).
4. Use existing pillar geometry faulted non-faulted pillars.
5. OK.
6. 3D Gullfaks (Skeleton) [DC] . , Change time/depth settings for the window (Tool bar) TVD.
e) , 3D .
f) Output tab Velocity Model process. original, corrected final , , (well tops correction) .