How to import completion event data in Petrel
How to import completion event data in Petrel
Make sure you have wells imported. (See Import wells in Petrel). Remember that completion event data can only be imported for well trajectories already imported into Petrel.
- Make a text file for the production data with *.ev extension according to Well event file format.
- Expand the Wells folder in the Petrel Input pane.
- Right-click on the Global completions folder and select Import (on selection)...
- In the import file dialog window that appears, select the *.ev file.
- Once the file is selected, click on Open and you will have access to the Import event data dialog window.
Note: to add casing go to Import settings in Import event data dialog window and click on Add casing to all wells with events
Well event file format
| Event name in File | Completion name in Petrel |
| Perforation | Perforation |
| Barefoot | Perforation |
| Acidize | Stimulation |
| Stimulate | Stimulation |
| Frac | Stimulation |
| Rework | Perforation |
| Plug | Plug |
| Squeeze | Squeeze |
| Welltest | Well test |
| Hydr-frac | Hydraulic fracture |
Perforation, barefoot and rework
Perforation, barefoot and rework events are converted to Perforation events on import into Petrel. The WELLNAME keyword is followed by the well that the subsequent event belongs to. The first column of data is the date at which the events were performed. The following information is the event type, the top depth, the base depth, the Wellbore diameter and the Skin.
-- This is a comment line UNITS FIELD WELLNAME WELL-1 --DATE EVENTMD1 MD2 Diameter Skin 01/01/2004 perforation 4000 4020 .5 0 01/12/2002 barefoot 3500 .4 -2 01/01/2005 rework 3600 3900 .380.5
Acidize, stimulate, and frac
These all have the same effect. They modify the damaged skin used in the connection factor calculation over a specified measured depth. The WELLNAME keyword is followed by the well that the subsequent event belongs to. The first column of data is the date at which the events were performed. The next information is the event type, top and bottom depth and Skin.
-- This is a comment line UNITS FIELD WELLNAME WELL-2 --DATE EVENT MD1 MD2 Skin 01/01/2004 acidize 4000 4020 0 01/12/2002 stimulate 3500 3700 -2 01/01/2005 frac 3600 3900 10
Plug and squeeze (cement squeeze)
These both act to close connections, with squeeze closing them over a specified range and plug closing all connections below a given measured depth. The plug has only one data item following the plug name, namely top depth. All connections below the plug will be sealed off. The squeeze has two items following the squeeze name namely top and bottom measured depth.
-- This is a comment line UNITS FIELD WELLNAME WELL-2 --DATE EVENT MD1 MD2 01/01/2004 squeeze 4000 4020 01/12/2002 plug 3500
Welltest
This keyword specifies the Kh product over the entire well. Following the Welltest name is the Kh value. This will create a well test completion of type 'Perm.*Length and Skin' whose depth range is the entire well. The target Kh is taken from the event file and no skin value is used.
-- This is a comment line UNITS FIELD WELLNAME WELL-2 --DATE EVENT Kh 01/01/2004 welltest 14000There are two different methods of specifying the event file. Petrel reads both. The first introduces the WELLNAME before the dates and subsequent events.
Hydraulic fracture
To create a hydraulic fracture you need to specify in addition to the date and the event name the followings:
- The center of the fracture in measured depth (MD).
- The top of the fracture in true vertical depth sub sea level (TvdSS).
- The bottom of the fracture in TvdSS.
- The length of the fracture.
- The orientation of the fracture.
- The permeability of the fracture.
- The width of the fracture.
-- This is a comment line UNITS METRIC WELLNAME WELL-1 --DATE HYDR-FRAC Center(MD) Top(TvdSS) Bottom(TvdSS) Length Orientation Permeability Width 01/01/2000 hydr-frac 1515 1505 1525 100 0 10000 0.005
Well event file (*.ev) examples
Example 1
-- This is a comment line UNITS FIELD WELLNAME WELL-1 --DATE EVENTMD1 MD2 Diameter Skin 01/01/1998 perforation 4000 4020 .5 0 01/12/1999 plug 4000 01/04/2004 welltest 15000 01/01/2005 perforation 4100 4200 .5 0 WELLNAME WELL-2 --DATE EVENT MD1 MD2 Diameter Skin 01/01/2002 perforation 4000 4020 0.5 0 01/12/2002 stimulate 3500 3700 -2 01/01/2005 frac 3600 3900 10
Example 2
-- Next line is also a comment line --DD.MM.YYYY WELLNAME EVENT DEPTH1 DEPTH2 DIAM SKIN 01.08.1992 Q13 perforation 10 30 0.5 0 01.09.1992 Q13 perforation 30 500 0.5 -2 12.10.1992 Q18 welltest 1500 01.10.1992 Q13 acidise 30 50 0.55 -2<br />