Petrel官方地震解释培训M4_Well_Ties_Synthetics

Despiked
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Log estimation – Make density from sonic
1. Right click on the well where an estimated log should be generated
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2. Click on Use existing, select Global Well Log from the list
Execute
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Acoustic impedance and Reflection coefficient series
1. In the Seismogram tab, click on Create synthetic seismogram
2. Select Density to use
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Opens settings page for the object Create a new object Opens the spreadsheet for the object
Well selection
1. Select a single well or the Wells folder to work with from the drop down menu
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Synthetic seismogram
1. Click on the Synthetic seismogram pull down menu to view its content
2. Reflection coefficients and wavelet is input when Apply or OK is clicked
Make well section
1. Select New well
section window
from the Window
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menu
2. Expand the Wells folder and select the appropriate wells
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3. Expand the Global well logs folder and select the available logs to use
1. Create new object for Wavelet.
Open Settings for it
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2. Select Synthetic type of seismogram 3. Select which Synthetic wavelet to use
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Ricker
4. Set parameters dependent on the selected Synthetic
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Wavelet shape
Phase Amplitude
Ormsby Klauder Butterworth
Extracted wavelet
1. Select Extracted type of seismogram
2. From Input pane, select seismic data and Well. Drop both ino the dialog box using the drop in arrows
4. Click on Execute to generate the global time log
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5. Click on Shared
checkshots, select
and drop in a
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source well from the Well filter of a
checkshots item.
3. Set Action #1 to Density from Sonic 4. Select Input Log 5. Apply default parameters
Sonic
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Est.density
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Process diagram
1. Double click on the Synthetics process under Stratigraphic modeling
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2. Move the mouse over each of the different icons to see hints on how to use them
3. Select wells to work with and a well section to display any results in
Sonic Log
T.D.R.
Time
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Dept h
Well time/depth relation
1. Well TDR is defined by generating global time log(s)
2. Open Settings for Global time.
3. Rearrange the priority list using the blue up/down arrows. Mark (green tick) objects to select from
4. Select density and sonic log onput
5. From the Acoustic impedance pull down menu, select the newly created log
3. Click on create new object icon to generate an Acoustic impedance log. Settings opens for selection
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2. Change Action #1 to Despike 3. Use default parameters 4. Run and view the result in well section 5. Undo and adjust parameters if not
satisfied
Sonic
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Load checkshots
1. Fit input parameters (A) to file (B) 2. Connect to welltrace 3. Correct data (if needed) 4. OK (one file) or OK For All (two or
3. a) Select which extraction method to use, Radial or Orbital (3D) b) Set number of traces to use along seismic line (2D)
4. Set appropiate parameters for method chosen.
3. a) Set Neighborhood extent for 3D seismic b) If 2D lines are used, set number of traces
4. Select Taper window type
5. Alternative type of seismogram is loaded from file
6. Import the file in the Input pane and open it in the dialog box
7. Set Time unit
Bartlett Cosine Hamming Hanning Papoulis
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3b
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Phase
Amplitud e
Wavelet shape 5 6
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Signal: • S=R*Wavelet
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*
=
Well seismic extraction
1. In the Well seismic tab, check the Create well seismic box
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2. From the input pane, click on the seismic data object and drop it in using the drop in arrow
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Synthetic seismogram settings
1. After generation of the synthetic seismogram, open Settings from the Shynthetics process dialog box
2. Bad logs must be edited Estimate logs if missing Splice log intervals Manual editing
GR Sonic Density Caliper CS
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Log editing
GR Sonic
1. From Global well logs Right click on DT and select Calculator
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Log input and QC
1. Input data to Synthetics; Logs: Sonic [s/ft] Density [gr/cm3] Check shots (CS): Check Shot Survey (or) VSP Additional logs (optional): GR [API] Caliper [Hole diameter] Any other
1. Right click on Wells folder and use Import (on selection)…
2. Select file(s) to import
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3. Make sure Files of type is correct
4. Access the files by clicking Open
more files if in same format) 1 A
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5. Right click on checkshots to open the spreadsheet 6. Change depth from MD to TVD. Compare TVD and
TWT with input file(s) and other time/depth information
4. Color fill logs by using the Create/edit curve fill tool
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Process overview
1. Select wells 2. Sonic correction 3. Time/Depth lookup 4. AI log and RC series 5. Generate Wavelet 6. Synthetic Seismogram 7. Correlate Seismic
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2. Make expression Sonic_despiked=DT
3. Use sonic as template
4. Sample MD from log and select DT as input
5. Click Enter
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Log editing - Despgs Right click on Sonic_despiked and select Log editor
6. Click on the Create new object icon for Reflection Coefficients. Select AI log for input and use the new log as input for RC
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Synthetic wavelet
2. Working with one well only deactivates the Wells tab selection
3. Clicking None in the Wells tab, activates the separate well selection list
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Load checkshots
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Sonic correction
1. Do the Sonic correction based on original sonic and check shots
2. Use the generated corrected sonic as input in the process
Check Shot Survey