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Typewell worksheet

The typewell worksheet is used to view well-level production on a group of wells and calculate average performance. This can be used to create a forecast for wells with limited or no historical production based on a relevant group.

Note: This worksheet works with your IHS Harmony Forecast™ license.

You can add the following typewell worksheet types:

gas typewell
oil typewell
water typewell
BOE typewell
condensate typewell

Note: Only the traditional decline analysis is available for each of the above fluid types.

Plot toolbar

You can toggle different rates by clicking these icons on the toolbar above the plot:

Select a Best Fit range using the options listed — see best fit.
Show / Hide Average rate — by default, the average rate is shown. Click this icon to show / hide the average rate on the plot. The arithmetic average of all selected wells is determined in each period.
Show / Hide Wells — by default, all wells are shown.
P90 / P50 / P10 rates — by default, all these rates are hidden. Click the P90, P50, or P10 icons to show / hide these various rates on the plot.
Show / Hide Number of Producing Wells — you can display the number of producing wells in each period.
Append historical production with selected forecast — you can use an individual well's historical production and forecasts to create a typewell forecast.
Color Management — select from these options:
- All Grey — displays all wells in a grey color.
- All Unique — displays each well in a unique color.
- Color by Attribute — opens a submenu where you can select a specific attribute. All wells with the same attribute appear in the same color.
Settings — select which rate calculations you want to display on the plot: All Rates or Producing Rates Only.
Plot drop-down list — select your plot type from the drop-down list: log y, coordinate, log-log, or log x.

For a description of common icons, see plot toolbars.

Best fit

There are several tools that you can use to create a "best fit" using the point-selection method. Selecting any of these options opens the Set Axis Ranges dialog box where you can define the portion of data to be used for the best fit.

Plot Selection tab

The Plot Selection tab lists the options for your plot.

X-axis:

Normalized Time — This option plots well data as cumulative time from 'time zero' (0 on the x-axis) rather than as dates. Time periods are displayed in increments of months or days. If the increments are mixed within the group, the lowest-resolution time period is used to ensure consistency. When the average line is calculated, each producing well's rate is averaged at each period.
Normalized Flowing Time — This option is similar to normalized time, but all shut-in, missing, or blank periods are removed from each well's production history.
Cumulative Production — Production volume is displayed based on volume produced per time period. (The period size is the one the data is imported in.) When creating the average well, all wells are aggregated to the lowest resolution period, and the average production volume and rate are determined for each period.
Resolution — Toggle between Daily and Monthly.

Y-axis:

Rate — This option displays the rates for each well in the group and uses these rates to create the average well's rate.

Rate per Attribute — Well rates are normalized (that is, divided) by the value of the selected attribute. If the attribute is blank, the well's production history is not displayed.

Rate Type — Toggle between Operated Rate and Calendar Rate.
Cumulative Production — Production volume is displayed based on volume produced per time period. (The period size is the one the data is imported in.) When creating the average well, all wells are aggregated to the lowest resolution period, and the average production volume and rate are determined for each period.
Note that if you select this for your y-axis, the typewell becomes read-only.

Wells tab

Use the Wells tab to synchronize well settings between typewell worksheets via the toolbar. In addition, you can change the start period of a well by entering a value in the Start Date Offset boxes, or by clicking the blue left- or right-facing arrows next to the boxes.

The number in the box corresponds to the time period in which production data starts for the well. (On a time plot, this is either months or days. On a cumulative plot, this is production volume produced in that time period. Therefore, a well with larger production volume moves more than a well with less production volume.)

Anything to the left of time zero (0 on the y-axis) is not used for the calculated lines or the decline forecast.

Hovering over a well temporarily displays a thicker line for the associated dataset on the plot.

A selection can be made within the Wells tab, or on the plot. Selections are maintained between the Wells tab and the plot. A selected dataset is displayed with a thicker line to indicate that it is selected.

Wells can be selected in the Wells tab using standard selection behavior (including using the Ctrl and Shift keys). For more information, see selecting entities.

Clicking a dataset clears the existing selection, and then selects the new dataset. Pressing the Ctrl key while selecting a dataset adds / removes the dataset from the existing selection.

Toolbar

This tab has the following icons on its toolbar:

Check all / uncheck all — selects or deselects all of the wells displayed on the plot
Apply Selections from another Typewell Worksheet — gets selections (selects the same wells) and spinner values (offset values that translate the rate history for a well) from another typewell worksheet in the same custom group.
Set Start Date Offsets to Zero — sets all well offsets to zero.
Set Start Date Offsets to Peak Rate — sets all well offsets to the well's peak rate – time zero for the well becomes the peak rate instead of the first period.
Set Start Date Offsets to Specified Value — opens the Shift Spinner Value dialog box where you can set your well offsets (positive values only). This moves the plot to the right (0 corresponds to the beginning of production data. You can also use the blue left- or right-facing arrows on the Wells tab.

Context menu

Right-clicking wells on this tab lists these options:

Duplicate Selected into Shared Custom Group — copies the selected wells into a new or existing shared custom group.
Duplicate Selected into Private Custom Group — copies the selected wells into a new or existing private custom group.
Move Selected into Shared Custom Group — moves the selected wells into a shared custom group. . Only available if the active group is a Custom Group.
Move Selected into Private Custom Group — moves the selected wells into a private custom group. Only available if the active group is a Custom Group.

Analysis Manager tab

The Analysis Manager tab has an Analysis Manager pane and an Analysis Parameters pane. The Analysis Manager only shows typewell analyses, unlike other worksheets, which show all analyses while disabling ones that cannot be displayed on the plot.

Decline and multi-segment decline analyses displayed on the typewell worksheet have their forecast start dates matched to the start date of the first segment, and the forecast always starts at t / Q = 0.

IHS Harmony Enterprise™ 2017.2 | Last revised: July 10, 2017