Petrel Initial Data Tobe Loaded
Uploaded by
Hossein TashaPetrel Initial Data Tobe Loaded
Uploaded by
Hossein TashaInitial data.
Tobe loaded
• Seismic Volume
– Seismic Horizons (TWT)
• CARACAS (imported and used to make the velocity model) without editing)
• HUSTON
• KOBE
• PARIS
• SALT
– Seismic 2D survey
• Seismic Velocities (3D Volume)
• Well folder
– Well heads (well location)
– Well deviation (Flourite Well has a different file structure, be carefull)
– Well log (GR, DT, etc.) Some GR with anormal low values, multiply by 10 or 16.5 and check.
– Checkshoot (for each well)
• Well Tops folder (TWTpicked and DEPTH (ftUS))
– CARACAS
– DALLAS
– HUSTON (will be top of model)
– HUSTON BASE
– KOBE (will be Bottom of model)
– SALT
Velocity model. Main steps.
• Make surface for each imported horizon CARACAS, HUSTON,
KOBE, PARIS AND SALT. No seismic reinterpretation is neccesary.
– How to create a surface: Surface/edit processes pane.
• Generate Velocity model from sufaces (TWT) and Well tops.
– Velocity model from geophysics procceses directory
• With generated velocity model convert 3D volume to Depth
Domain.
Following next steps…
Make a Surface
In procceses Pane. Click twice in
Make/edit surface
2. Add using the blue arrow
1. Select horizon
Make a Surface: INPUT DATA
If result Surface is in blank
and name box unchecked.
Petrel will write the same name for
resulting surface
If we had an area of interest to make
a boundary surface, use it (polygon
data).
In this case (to mak evelocity model),
don´t use.
Make a Surface:GEOMETRY TAB
1. Select the seismic data
1. Click in get all set.. . To append the geometry information.
Make a Surface:POST AND PREPROCESSING TABS
ACTIVATE ACTIVATE
SELECT
ACTIVATE
Make a Surface:Well adjustment tab
Other tabs use
by default
settings
Make a Surface:Resulted surface
New surface appears into the input pane. Remember that we are working in Time domain yet.
Create rest of them….
Velocity model
Append as many rows as surfaces
Choose Well Tops Correction
Choose surface option and add the twt surface Select Avg Cube option
Velocity model
First of all.
Go to Well Folder and click (right button) and select
Settings.
First of all.
Velocity model
Go to Well Folder and click (right button) and select
Settings.
1 select tops and check box
2 go up
Velocity model
activate
Velocity model
Affter click Aply or Ok a report will be generate.
This process run, will take several minutes.
Velocity model
New velocity model
will be create in the
model pane.
Time-Depth convert
Go to seismic volume and click rigth button
and select Domain convert by active velocity
model.
Use this way to seismic surfaces-horizons
conversion. In those cases the depth domain
will be storaged in the attributes of
surfaces….
Velocity model
Open a 3D window in TVD Domain and check the converted surfaces.
Working with depth data
From now. We can work with seismic volume in Depth Domain directly.
Remarks: in order to get the maximum workflow ,no QC has been carried out.
In the zip file, two depth surfaces and boundary polygons can be found.
Huston surfaces and Kobe surfaces.
NEXT STEP: DEFINE MODEL GEOMETRY.
In processes pane. Click twice on
Geometry definition process.
From 3D
volume in
depth
Cell size of
model
From now. The results of all this processes will appear
in the model pane.
select fault from interpretation folder.
Previously converted to depth domain
Add rows for each fault
STEP 2. Activate
geological rules. In order
to make zones.
add tops
STEP 1
add surface from input pane.Previously
converted to depth domain
Add rows for each surface
STEP 3
Select conformable to KOBE surface
In order to improve the accurate
change to 20 layers
Structural grids results can be viewed in Models pane
NEXT PHASE. UPSCALE PROPERTIES
Petrophysical properpties from log to model.
Seismic attributes from seismic to model.