6. EXERCISING SEDPAK

6.01 Exercising the SEDPAK EXEC Menu - Open, Pause, Resume, and Load and Restart
6.02 Exercising the SEDPAK EXEC Menu - Zoom
6.03 Exercising the SEDPAK EXEC Menu - Plotting Controls
6.04 Exercising the SEDPAK EXEC Menu - Display Controls surface lines
6.05 Exercising the SEDPAK EXEC Menu - Display Modes
6.06 Exercising the SEDPAK EXEC Menu - View Controls
6.07 Exercising the SEDPAK EDIT Menu - 0pening a File to Edit
6.08 Comments
6.09 Constants
6.10 Setup
6.11 Understanding Shore Error
6.12 Basin Surface and Deus ex Machina Surfaces
6.13 Sea Level
6.14 Subsidence, Faulting, and Salt Tectonics
6.15 Clastic Supply
6.16 Depositional Distance
6.17 Depositional Parameters
6.18 Winnowing
6.19 Carbonate Rates
6.20 Hardgrounds
6.21 Lagoonal Damping
6.22 Wave Damping
6.23 Pelagic Deposition
6.24 Carbonate Parameters
6.25 Building Carbonate Geometry: Aggradation, Backstepping, and Progradation
6.26 Overburden
6.27 Time Boundaries
6.28 Pseudo Well
6.29 Out of Plane
6.30 Two Sided Basin Simulation
6.31 Maturation Modeling - Thermal Gradient and Surface Temperature
6.32 Exercising the SEDPAK FACIES Menu

This chapter describes a set of exercises designed to demonstrate how to use the parameters discussed in the first five chapters of this manual. The exercises change the parameters from selected data (.db) files interactively demonstrating the features and power of SEDPAK . The set of data (.db) files used for these exercises are included with this release of the SEDPAK software.

The exercises are divided into those that use the SEDPAK EXEC (see Sections 6.1- 6.6), SEDPAK EDIT (see Section 6.30), and SEDPAK FACIES (see Sections 6.31):

EXEC menu exercises:

€ Opening a file, Pause, Load and Restart, Resume (6.01) and Zoom (6.02)

€ Plotting Controls (6.03)

€ Display Controls (6.04)

€ Display Modes (6.05)

€ View controls (Sea Level Highlight, Well Position, Facies Definition, and Maturation Model) (6.06)

EDIT menu exercises:

€ Opening a file to edit (6.07)

€ Comments (6.08), Constants (6.09), and Setup parameters (6.10)

€ Understanding Shore Error (6.11)

€ Basin Surface and Deus ex Machina Surfaces (6.12)

€ Sea Level (6.13)

€ Subsidence, Faulting, and Salt Tectonics (6.14)

€ Clastic Supply and how it can vary with time (6.15)

€ Depositional Distance and how it can vary with time (6.16)

€ Depositional Parameters which cause bypassing of clastics and carbonates (6.17)

€ Winnowing of shale in the shallow water (6.18)

€ Carbonate Rates changed as a function of time (6.19)

€ Hardgrounds produced after large eustatic fluctuations (6.20)

€ Lagoonal Damping and how it alters carbonate production rates (6.21)

€ Wave Damping functions which alter carbonate production rates (6.22)

€ Pelagic Deposition varied as a function of time (6.23)

€ Carbonate Parameters which can be varied to affect deposition and erosion (6.24)

€ Building Carbonate Geometry: Aggradation, Backstepping, and Progradation (6.25)

€ Overburden which can be varied to affect compaction (6.26)

€ Time Boundaries which delimit sequences (6.27)

€ Pseudo Well (6.28)

€ Out of Plane (6.29)

€ Two Sided Basin Simulation (6.30)

€ Maturation modeling (6.31)

FACIES menu exercises:

€ Exercising the SEDPAK Facies menu (6.32)

In order to initiate the program, first type "sedpak" and the SEDPAK LAUNCH menu is activated. From the LAUNCH menu initiate the SEDPAK EXEC, SEDPAK EDIT and SEDPAK FACIES menus. Start with the SEDPAK EXEC menu and then move to the SEDPAK EDIT and the SEDPAK Facies Editor menus. If the files used with the SEDPAK EDIT and the SEDPAK Facies Editor menus are to be modified, it is important to remember to save the exercise files with new file names using Save As.... This procedure to save files is described in Section 2.03.

NB: If running the program becomes a problem, don't take hours to try to solve the problem but instead contact the USC SEDPAK group and they will help you.

6.01 Exercising the SEDPAK EXEC Menu - Open, Pause, Resume, and Load and Restart

To become familiar with the SEDPAK EXEC menu, turn to Chapter 4 of the manual. Read Section 4.01, then load VailClast.db.

Opening a File (Section 2.06)

• Purpose: To open a file.

• €Exercise:
  • Click and pull down on File.
  • Select Open.
  • Select the desired data (.db) file (e.g. Demo_VailClast.db).

  
  The label at the top of the SEDPAK EXEC panel indicates the file that has been selected, namely VailClast.db.

Pause

• € Purpose: To pause the running program.
  
• € Exercise: Click on Pause.

Resume (Section 4.01)

• € Purpose: To continue the simulation after the pause.
  
• € Exercise: Click on Resume.

Load and Restart (Section 4.01)

• Purpose: To load and run the latest simulation again.
  
• € Exercise: Click on Load and Restart.

Save and Save As... (Section 4.01)

• € Purpose: To save the file that has been edited. Save As... is used if a duplicate of the file with different name is needed.
  
• € Exercise: Click on Save or Save As... and change the name of the file.
  
  

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6.02 Exercising the SEDPAK EXEC Menu - Zoom

• Purpose: To enlarge a portion of the simulation display (see Section 4.01).
• There are two ways to define the area to be zoomed.
  • Draw a frame around area to be zoomed.
  • Type in the coordinates to define the area to be zoomed.
    
    
• € Exercise:
  • Load Ex_TwoSided.db.
  • Click on Pause.
  • Click on Zoom.
  • Zoom dialog activated.

Zoom - Draw frame around area

• € Exercise:
  • Click on the simulation window.
  • Still holding the mouse button, drag the pointer and a light blue rectangular square will enclose the area to be zoomed.
  • Release the mouse button.

  The area in the frame is zoomed .

Zoom - Type coordinates

• € Exercise:
  • On Zoom dialog window, click on Enter Coordinates.
  • Type in the position of the Left, Right, Top, and Bottom boundaries for the desired zoom section.
  • Click OK.

  The simulation window is zoomed.

Multiple zoom

• Exercise:
  • Multiple zooms of the SEDPAK output are activated if the steps listed above are repeated.

Unzoom

• Exercise: To return to previous zoom
  • Click Unzoom on the Zoom dialog.

Previously zoomed image is displayed.

Unzoom All

• Exercise: To return to the full basin view
  • Click on Unzoom All .

Entire unzoomed basin cross section is displayed.

Inset View

• This option splits the simulation window in two. (Figure 6.2.1)
• € Exercise:
  • Load Ex_Twosided.db.
  • Click Zoom.
  • Define area to be zoomed.
  • Turn on Inset View on the zoom dialog.

The top window encompasses the whole display which includes the zoomed area outlined by the rectangle.

The bottom window has the zoomed image.

Synchronize

• This option is applicable when both the Display Modes (Top and Bottom) are on. By turning on the Synchronize button, the zoomed area for Top and Bottom windows will be the same.
• Exercise:
  • Load a file.
  • In Display Mode (SEDPAK EXEC menu) select:
    • Top: Basin-Lithologic Ratio
    • Bottom: Basin-Sequence
  • Click Zoom.
  • Turn Synchronize on.
  • Define area to be zoomed in Top window.

The area zoomed in the Bottom window will automatically match the area zoomed in the Top window.

Deactivate zoom

• € Exercise:
  • Click on Cancel in the zoom control window.

Note how if Chronostratigraphic had been selected in the Bottom window Synchronize remains greyed out and inactive because it has different dimensions, as do the well plots (Time-Depth-Elevation, Geohistory, etc.)

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6.03 Exercising the SEDPAK EXEC Menu - Plotting Controls

• Purpose: Control the frequency that the simulation output is displayed (see Section 4.02).
• € Exercise:
  • Load a file.
  • Click on Pause.
  • Click on Plot every time step.
  • Click on Load and Restart.

  The simulation will plot every time step.
  
  

  • Click on Pause.
  • Click on Plot Sequence Boundaries.
  • Click Load and Restart.

  The simulation will only plot at times defined in Time Boundaries (see SEDPAK EDIT section 3.18).
  
  

  • Click Plot every nth time step.
  • Type 2 in the active window and click Apply.
  • Load and Restart.

  The simulation will plot every 2 time steps.

Note: The program will run faster by choosing a larger number for the Plot every nth time step function, also if n is set to the number of time step of the simulation, only if final plot is output.

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6.04 Exercising the SEDPAK EXEC Menu - Display Controls surface lines

€ Purpose: To display certain intervals of time lines. This option can be used when the time lines are too close to each other (see Section 4.03).

• € Exercise:

-Load Ex_Bahamas.db.
Make sure the Surface Lines is "1" on the Display Controls.
-Now change Surface Lines to "5".
-Click Apply.
-Click on Load and Restart.
-Only every 5th time line will be displayed.

If n is set to number of time steps in simulation, no time lines are shown except initial and final basin surfaces.

6.05 Exercising the SEDPAK EXEC Menu - Display Modes

€ Purpose: To display two different modes in the simulation window (see Section 4.04 and Figure 6.5.1).

• € Exercise:

-Load Demo_VailClast.db.
-Click on Pause.
-Go to Display Mode.
-Display:
Top window to Basin-Lithologic Ratio
Bottom window to Chronostratigraphic

Note: To only display one window in the simulation window, choose None in the bottom window.

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6.06 Exercising the SEDPAK EXEC Menu - View Controls

€ Purpose: To establish how simulation output can be modified with View options (see Section 4.05).

• € Exercise:

-Load Demo_VailClast.db.
-Click on View.
-Turn on and off the options.

The first 7 options and XWD are not discussed here but are explained in Section 4.05.

NB:Well Cross Section:

Well Cross Section displays the locations of wells defined in the Pseudowell option of the EDIT menu (see Section 3.20).

Sea Level Highlight:

• € Purpose: To highlight the portion of the basin related to a chosen sea level event but using the Sea Level Highlight dialog or by dragging the mouse pointer on the sea level curve (see Section 4.05).
  

• € Exercise: Use Sea Level Highlight dialog to define the sequence deposited at a sea level event.

-Load Ex_SeqStrat00.db.
-Click and pulldown View from the EXEC menu.
-Click Sea Level Highlight.
-Type "-14.0" and "-13.20" in Enter First Position and Enter Second Position respectively.
-Click on Apply.
-In which sea level event was this sequence deposited?

• € Exercise: To define which sequence was deposited during a particular sea level event by dragging the mouse over the sea level curve.
  -Place the pointer on the sea level curve.
  -Drag over the second low stand on the sea level curve.
  What systems tracts does this sea level event represent?

Select Well Position...:

• € Purpose: To show how the location of the well is used to model Burial and Thermal History can be changed (see Section 4.05).

• € Exercise:

-Load Ex_SeqStrat000db.
-In Display Modes, choose Burial-Sequence mode.
-Click View and chose well position.
-Enter well distance "200" and click OK.
-Run the simulation.
-Now change the well distance to "350" and run the simulation.
What does the effect of burial have on the burial history of these rocks?

Select Facies Definition File...:

• € Purpose: To show how facies displays of simulation can be changed by selecting different *.facies files (see Chapter 5)

• € Exercise:

-Load X_GippslandBasin.db.
-In Display Modes, choose Basin-Facies.
-Click and pulldown View.
-Select Facies Definition File.
-Load Fac_AvePorLow.facies.
How does porosity vary?
-Now load Fac_Krumb_Sloss.db .facies.
Which section has the most hydrocarbon potential.

Select Maturation Model...

• € Purpose: To choose TTI and/or Kinetic models for Maturation modeling (see Sections 3.21-3.23 and 4.04).

• € Exercise:

-Load Ex_matur1.db.
-In Display Modes, choose Burial-Maturity for both Top and Bottom view.
-Click on View.
-Select Maturation Model.
-Choose TTI for Top Display Model and Kinetic for Bottom Display Model.
-Click Apply.
Explain the effects just produced (Waples 1984).

Chapter 6, Section 07

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