Click to see subtopics:The volumetrics analysis is used to estimate the original hydrocarbon fluid volume in a reservoir. This analysis requires knowledge of reservoir rock properties, as well as fluid saturations and properties. A volumetric analysis can be conducted at any point in the production history, but it is most often used early in the life of the reservoir. For more information, see volumetrics theory.
| Note: | This analysis works with your Harmony Forecast™ license. |
Toolbars
For information on the primary toolbar (and context menu), see the Analysis Manager.
The secondary toolbar is located in the analysis tab and includes the following important icon:
-
Defaults — copies parameters from the Properties editor.
For information on common icons, see plot toolbars.
Parameters
Enter (or edit) the parameters in the worksheet. As values are calculated, the summary values in the Analysis Manager are also populated.
- Reservoir Properties — these parameters are pre-populated from the Properties editor. However, you can amend parameters to see how variation in reservoir properties affects results. To re-populate all of the parameters from the Properties editor, click the Defaults icon ().
To re-populate a specific parameter from the Properties editor, click the Defaults and Limits button (
) to the right of the parameter. - Oil / Gas Properties — these parameters are pre-populated from the Properties editor, but you can change some of them. Volumetric calculations use the properties specified in the volumetric analyses.
- Formation Volume Factor — you can enter a formation volume factor (Bgi or Boi), or click the checkbox to let Harmony Enterprise automatically calculate this value.
- Adsorption (intended for shale gas) — you can enter adsorption values to calculate OGIPA. (The default values are those set in the Adsorption section of the Properties editor.)
- Volume Parameters — Since reservoir area, rock volume, pore volume, and hydrocarbon pore volume are all linked to each other, OFIP can be calculated based on any of these inputs. Click the option
for the parameter you want to enter.
You can also set Dimensions (reservoir length xe and reservoir width ye). In this case, the reservoir area is calculated based on given dimensions, and this area is used to calculate the remaining volume parameters.
Or, you can calculate OFIP based on the RF and EUR, by clicking the EUR option. - In a gas analysis, a surface loss parameter (SL) is available. When SL is entered, the Sales EUR parameter is calculated (if EURg exists).
| Note: | The gas volume analysis has different parameters depending on whether the well is a dry / wet gas well, or a liquid-rich gas well. In the case of a liquid-rich gas well, a volumetric analysis calculates and displays OGIPd (original dry gas-in-place), as well as OGIPr (original recombined gas-in-place). Additionally, OCIP (original condensate-in place) is calculated. When displaying volumetric analysis results in the Results Viewer, gas summary parameters (OGIP, EURg, GpNet, RRg, and RFg) are displayed in terms of dry gas, not in terms of recombined gas. For more information on calculations for liquid-rich gas wells, see volumetrics theory. |