Lec13-14
-
Upload
xiao-zhang -
Category
Documents
-
view
24 -
download
0
Transcript of Lec13-14
Tom Wilson, Department of Geology and Geography
Objectives for the Day
• Some more on grid operations• Intro to Petrel• Setting up a project
• Importing well data• Basic view manipultation• Importing formation tops• Make-edit surface• Edit map display color
F39 Well Log Derived Depth
Map comparison: subtract one map from another
Contours > Isomap Grid Operations
Uses grid parameters derived from the key grid
Examine the difference between well log derived depths and those derived from seismic using stratigraphic and well log picks for depth conversion
Negative – a negative is positive if absolute value of 2nd term is greater.
Deeper well log depth subsea
Deeper seismic depth subsea
Computing gradient or derivative maps
1st derivative of the F39 surface in the dip direction: highest positives and lowest negatives mark curve inflection points
Bring up Petrel
Select License Package
Kudos to Valerie Smith for for preparing the data set
and the handout.
Basic Petrel project window layout
Inputs Models Results Templates
Processes Cases Workflows Windows
Basic
project
tree
Starting a new projectProject > Project Settings
Under Units and Coordinates > Select Field for your units system
And you thought you were through with the Stratton dataset
We’re back to square 1. We have to import data and build a database.
Go to Insert > New Well Folder
Your input tree should now include a wells drop down list.
RC > Import on Selection
The ascii import file has a simple structure. Note that the column titles are listed following the BEGIN HEADER line
Familiar well numbers from
StrattonUndefined value
KB & TD
View Petrel Import File Structure
Petrel reads the header list and should follow the format of your input ascii file
Display window manipulation basics
Ctrl + shift > mouse up-down, left right to zoom in and out
Ctrl or shift > mouse up-down, left right to move the entire view up or down
Change vertical scale
Drop down the wells in the list and RC > Well Manager to see Petrel’s version of the well input file
You can QC to cross check posted values with your import data set
Remember that our Stratton data set also came with pre-picked formation tops. Those can also be imported.
RC>
MD Type Surface
Check the well tops drop-down check box.
Ctrl +shift > then move mouse to zoom in
Ctrl (or shift) + mouse movement up and down to position the window vertically
RC>
RC > Settings > Color as Horizon and change fonts
Plain vanilla to color highlights
Processes > Utilities > Make Edit Surface
& more
Utilities > Make/Edit Surface > structure contour map
Not yet?
Make/edit surface selections & activate the map in your input tree
Fine tune the color mapping
You should have map similar to the one below. Adjust the vertical exaggeration to see structural features in 3D relief.
Under the style tab > Adjust contour labels & explore other function tabs
• Before leaving today do the short Petrel exercise