course 7: utilities and integration. digitize log program
TRANSCRIPT
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Course 7: utilities and integration
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Digitize log program
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Define curve type
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Wavelet Editor amplitude freq and phase can be edited separately save reference points wihcu
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Change spectrum to observe influence on wavelet
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Selecting the required omponend icon allows you to do the editing
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Batch Manager schedule and run processes later
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Fill Patterns create your own patterns
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Previous the pattern you develop
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Rebuild work area list: creates a new work area .lst file usually created auto when well is imported
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Project mode control: probably will not use since no standalone keys
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Log M Integration
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Switch to project mode: DC Utilities > Project Mode Control (from the drop down list) > Launch
Yes to switch
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Wells transferred from discovery to logM
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Click on the file menu in the logM well editor
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Select buld transfer collowed by > from Discovery to logM workspace
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Transfer from disc to logM
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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
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You can send wells from logM well editor or model builder >
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Click on well spots
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On cross section window select well-to well
Click on wells then click in blan area to initiate the model builder
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Change to projected mode
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Use to immediately generate 2d trace models in the model builder
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Top of the madison group with many wells note producing wells in highs and lows
Need stratigraphic modeling
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Madison and Torquay horizons picked in seisvision are displayed in the logM Well editor
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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
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Use fluid substitution model
Original synthetic
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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.
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Now wel will attempt to quant results with 2D strat modeling
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water oil water
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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
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We can now conclude that both oil (rather than water in the zone) and thickening of the oil zone produce increased amplitude
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Save back to cross section > auto updated > now out of sync> RMB on traces > regenerate traces
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Use view model in seisvision we can have the trace model show up in a second vertical trace window
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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
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Notice the southwest to northeast thickening of the Madison to Torquay interval > open arbitrary line
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Shows the peak of the Bakken sand over it’s extend across the field >2D models > high am best oil targets
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