course 7: utilities and integration. digitize log program
TRANSCRIPT
Course 7: utilities and integration
Digitize log program
Define curve type
Wavelet Editor amplitude freq and phase can be edited separately save reference points wihcu
Change spectrum to observe influence on wavelet
Selecting the required omponend icon allows you to do the editing
Batch Manager schedule and run processes later
Fill Patterns create your own patterns
Previous the pattern you develop
Rebuild work area list: creates a new work area .lst file usually created auto when well is imported
Project mode control: probably will not use since no standalone keys
Log M Integration
Switch to project mode: DC Utilities > Project Mode Control (from the drop down list) > Launch
Yes to switch
Wells transferred from discovery to logM
Click on the file menu in the logM well editor
Select buld transfer collowed by > from Discovery to logM workspace
Transfer from disc to logM
File > Bulk transfer > fr0m Log M Workspace
Trnasferred into discovery workspace and associated with UWI and API logs velocity etc can be transferred back to Discovery
You can send wells from logM well editor or model builder >
Click on well spots
On cross section window select well-to well
Click on wells then click in blan area to initiate the model builder
Change to projected mode
Use to immediately generate 2d trace models in the model builder
Top of the madison group with many wells note producing wells in highs and lows
Need stratigraphic modeling
Madison and Torquay horizons picked in seisvision are displayed in the logM Well editor
Note the mismatch using logm time alignment, stretch squeeze we can do much better
Synthetic is giving a much stronger peak in the Bakken
Wavelet phase and freq must match that in the data. We will use the wavelet extraction shaping filter to obtain a much better match
Use fluid substitution model
Original synthetic
Note the presence of slight peak in the synthetic with oil as the pore fluid
Next we will examine the influence of water versions of the sonic and density with the extracted wavelet. Note that this peak disappears.
Now wel will attempt to quant results with 2D strat modeling
water oil water
We will thicken the oil sand. Launch the middle well in the logm well editor We will use the multicurve stretch squeeze function to thicken the Bakken sand by about 5 meters
We can now conclude that both oil (rather than water in the zone) and thickening of the oil zone produce increased amplitude
Save back to cross section > auto updated > now out of sync> RMB on traces > regenerate traces
Use view model in seisvision we can have the trace model show up in a second vertical trace window
We can use the create correlation polygon option from the pop-up menu to overlay the thickened Bakken sand on other various locations on our seismic to attempt to discover other prospective drilling locations
Notice the southwest to northeast thickening of the Madison to Torquay interval > open arbitrary line
Shows the peak of the Bakken sand over it’s extend across the field >2D models > high am best oil targets