Landmark Graphics Corporation Mapping and VolumetricsDetermining Sensitivity

Overview

Sensitivity computes and generates a summation report that shows theeffects of various cutoff values on the following variables when youinput the initial cutoff value, final cutoff value, and incremental stepsfor sensitivity:

Net Pay Cumulative Net Pay Cumulative Net Pay Hydrocarbon Pore Volume Thickness Average Porosity Average Water Saturation Average Porosity for Reservoir RockR2003.12.1 Determining Sensitivity: Overview 43

Reports and Utilities LandmarkSensitivity Report

You can use the Sensitivity report to vary the cutoff percentage and toshow the effect of the cutoffs by depth or by unit.

Window Layout

To access Sensitivity, select Interpret Sensitivity from thePetroWorks Command Menu.

The Sensitivity window appears.

The Sensitivity window contains the following fields and parameters:

Main menu contains the File, View, Tools, and Help menus.

Input Curves panel enables you to specify curves for porosity,volume of shale, and water saturation; to indicate minimum,maximum, and incremental cutoff percentages; and to specify theunits of measurement for the report.

Units panel contains a list of the units defined within the selectedwell(s).

Generate Sensitivity Report button generates the report.

Main menu

Input Curvespanel

Zones panel

GenerateSensitivityReportbutton

Status area

DepthUnitsbutton44 Shared Utilities: Determining Sensitivity R2003.12.1

Landmark Graphics Corporation Mapping and Volumetrics Status Area contains information about the status of a report asyou build it and as it is generated.

File Menu

The File menu enables you to select one or more wells and to exit theSensitivity window.

View Menu

The View Menu contains the Clear Status Area and Curve Details(Single Well Only) options.

Tools Menu

The Tools Menu contains the Curve Focus option, which is an easy wayto apply curve names to parameter fields. The Curve Focus windowcontains a list of curves from the selected wells. If you position thecursor in a parameter field and then select a curve from Curve Focus,the curve appears in the field.

Generating a Sensitivity Report

Use the following steps to generate a Sensitivity report:

1. Choose File Select Wells.

The Select Wells dialog box appears. If you had specified a currentwell, it is highlighted.R2003.12.1 Determining Sensitivity: Sensitivity Report 45

Reports and Utilities Landmark.

Select one or more wells and click on OK.

2. Now, complete the Input Curve parameters.

Click in the Porosity field to anchor the cursor in it.

Specify the curve by either typing the curve name or byselecting Tools Curve Focus and selecting a curve from thelist.

To view curve details (name, service company, run, pass, andversion) for a single well, select ViewCurve Details (SingleWell Only) from the Sensitivity main menu.46 Shared Utilities: Determining Sensitivity R2003.12.1

Landmark Graphics Corporation Mapping and Volumetrics Type cutoff percentages for the Porosity curve into theMinimum, Maximum, and Increment fields.The initial cutoff value must be the smallest, and the final cutoffvalue must be the largest.

3. Click in the Shale Volume field and type a curve name or useCurve Focus to select a curve.

4. Type cutoff percentages for the Shale Volume curve into theMinimum, Maximum, and Increment fields.

5. Click in the Water Saturation field and type a curve name or useCurve Focus to select a curve.

6. Type cutoff percentages for the Water Saturation curve into theMinimum, Maximum, and Increment fields.

7. Complete the Report parameters.

Specify the depth type for the report by clicking on the DepthUnits toggle button and selecting Feet or Meters.

Select one or more units from the Units list. The list containsonly those units defined for the selected wells and chosen inaccordance with a source priority list for the current interpreter.See the Prioritizing Data chapter of this module.

8. To generate a report, click on the Generate Sensitivity Reportbutton or select File Generate in the Sensitivity window.

If the Report Viewer is open, Sensitivity displays the report init.R2003.12.1 Determining Sensitivity: Sensitivity Report 47

Reports and Utilities Landmark If the Report Viewer is not open, Sensitivity opens it anddisplays the report in it.

The following examples illustrate the completed Sensitivityparameters and the resulting report.

1. To save and/or print the report, see Viewing Reports with Report Vieweron page 6 in the PetroWorks/LogEdit Visualization Utilities manual.48 Shared Utilities: Determining Sensitivity R2003.12.1

Landmark Graphics Corporation Mapping and VolumetricsCommunicating Between Landmark Applications

You can communicate between applications via the PointingDispatcher. The OpenWorks (PD) (Pointing Dispatcher) allows you toimport wells from other Landmark applications into Summation. Youcan send and receive wells, as long as the PD frame is listening.

Press Ctrl-l to activate/deactivate the PD utility. When the PD border isgreen, PD is listening for other well data. When the border is red, PD isdeactivated for this application.

Iconified windows can receive information.

You can PD information to a window that is iconified as long as the border on theicon is green. If the iconified window is a StratUtil application and the border is red,you can use the key combination Ctrl+l (lowercase letter L) or click on theiconified window and select PD Listen from the menu that appears to turn theborder green and to enable listening capability.R2003.12.1 Determining Sensitivity: Sensitivity Report 49

Determining SensitivityOverviewSensitivity ReportWindow LayoutFile MenuView MenuTools MenuGenerating a Sensitivity ReportCommunicating Between Landmark Applications