A volumetric polygon that covers some
or all of a pool or the estimated drainage area around a single well.
Select a map layer based on the target map layers you created and then define a volumetric area by drawing a polygon within which to estimate technical reserves. To define a realistic drainage shape for a specific well, see Related Topics below.
AccuX uses the following four components to calculate technical reserves for an area:
A volumetric polygon that covers some
or all of a pool or the estimated drainage area around a single well.
The target layer where the pool is
located.
Reservoir properties for the selected
well(s) or the average within a volumetric polygon: Net Pay Thickness
(NPT), effective porosity (Phi), and saturation (Sw, So, or Sg).
Engineering settings such as the average
lifetime of GOR, the RF-recovery factor, and the formation volume factor
for Bo or Bg.
Reserves can be calculated using the following two-phase hydrocarbon systems:
Oil and solution gas
Gas and condensate
To estimate technical reserves
for areas
1. After
clicking new poly (
) in the left toolbar and creating a polygon around the area
for which to calculate technical reserves, hover your cursor over the
polygon until it appears highlighted then double-click it.
The GeoPolyForm Properties
dialog box appears.
2. Ensure a name appears in the mandatory Primary Name box and that implied closure is selected, then set any additional desired display properties and click OK.
3. Hover your cursor over the polygon until it appears highlighted then right-click the polygon and from the shortcut menu, select reserves and either oil and solution gas or gas and condensate.
If the cross section includes more
than one target zone, the Select Target
dialog box appears. Select the target zone for which to calculate reserves
and click OK.
Progress bars appear while AccuX performs the three-step calculation.
The Computing Reserves
dialog appears.
4. Review or type recovery factors based on the Average Characteristics of Rock Types.
Notes:
Net pay area is based on the
polygon and target zones you set.
Default GOR is 100. To review
the average GOR information for each pool in the project, using Explorer Tree View in the left
pane (View > Left
View Mode > Explorer Tree View), select
the UniPools folder and,
if desired, use this average GOR value in your reserves calculation.
5. From the category drop-down box, select a category and then click calculate.
The results of the reserves calculation appear in the lower portion of the Computing Reserves dialog box.
6. To register this reserve calculation click register and then click OK.
7. To review registered
calculations, in the left pane display the Explorer
Tree View (View
> Left View Mode > Explorer Tree View) and in the
Reserves folder, select
Imperial or Metric.
You can export this spreadsheet to Microsoft Excel.
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