Petrel tutorial

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Petrel TIPS&TRICKS from SCM Knowledge Worth Sharing

Well Sections in Petrel 2013 Petrel has been changing how to make Well Sections since the Petrel 2010 release. Even more changes were made in Petrel regarding how to build them in Release 2013. This TIPS&TRICKS shows:  How to create basic (and not‐so‐basic) Well Sections in Petrel 2013,  Where the elements are now located, and  The use of templates in the new version. The biggest change in Petrel 2013 is the location of the Well Section fence. In order to show this and other changes, we will build multiple Well Sections and add items to them by:  Adding wells  Changing the order of the wells  Adding logs  Changing the order of the logs and tracks in the section  Color‐filling between the log and a track boundary  Placing multiple logs in one track  Color‐filling between the logs in the track  Adding Well Tops  Color‐filling between the tops in between the wells  Adding seismic, 3D model horizons and properties in between the wells  Use of Templates (both Petrel supplied and User defined)

Creating a Well Section 1. To create a well section, click on Window  Well section window…

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2. You will then see a panel called Select new well section window settings. You can create a new cross‐ section (fence) or use an existing one, and create a new template or use a previously existing template. Cross‐sections (which contain the wells used in a Well section window) may be used again, if wanted (possibly use the same wells with a different template). If you have created one or more templates before, they are available to choose again or Petrel provides some predefined default templates. Templates used before Petrel 2013 are converted and saved, adopting the name of the well section, then sequencing 1, 2, 3, etc. 3. The templates are stored near the bottom of the Templates pane in the folder Well section templates. For now, let’s choose to create a new x‐section and a new template; using the default names (in this case; X‐ section 1 and Well section template 2).

4. The Cross Sections are stored in a folder in the Input pane named Cross sections. If this folder already exists, the new Cross Section is added to it. If the folder doesn’t exist, it is created and then the Cross Section is added to it.



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5. Click OK and the new empty Well Section appears in the graphics area and also at the bottom of the Windows pane. The Cross Section appears in the Cross sections folder and the template in the Well section templates folder in the Templates pane.

It is now time to add wells to the section.

Add wells to a Well Section There are three methods for adding wells to a Well Section: 

Clicking on the wells in the Wells folder.



Clicking on the wells in a 3D window.



Adding wells in the Cross sections  X‐section X  Settings  Definition dialog using the horizontal blue arrow. Highlight one or more wells, click the horizontal blue arrow, and they are added to the bottom of the well list for the section.

For now, let’s click on the wells in the Wells folder. We will look at another method later. 1. Expand the Wells folder (Input pane) until you can see the wells



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2. In this example, I clicked on the wells C1, C2, C3 and C7 in that order. The wells appear in that order in the Well section. Also, the wells appear in the Settings dialog for the Cross section (probably X‐section 1) under the Cross Section folder in the Input pane. Bring up the Settings and go to the Definition tab and you will see the wells. (Previous versions of Petrel had the wells listed under the Well Section picture in the Windows pane.)

3. To be better able to see where the wells lie relative to each other, open a 3D window and display the Wells along with the X section from the Cross sections folder in the Input pane. Expand this folder and place a checkmark in the box in front of the fence.



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4. I can see from the Well section fence that a better order for the wells would be C7‐C1‐C2‐C3. To change the order, return to the Cross sections  X‐section 1  Settings  Definition tab, and highlight the C7 well. Use the “Up arrow”

on the left to move it to the top of the list.

5. After hitting Apply or OK, the fence now looks more like I want it to look,

and the section now appears with the chosen wells and the depth tracks.



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Note that the depth tracks are in SSTVD, start at different depths and have different scales. These can be changed in the Well Section window’s Settings  Definition tab. 6. Click on the Lock button and change the scale to a constant value (like 2200).

7. Next, change the Well position synchronization to Flatten on depth and pick 2000 SSTVD.

8. Click OK. Sometimes, to see the flattening, you must try to scroll one well and the others will click into place. The section now looks like:



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Add logs to a Well Section 1. Adding logs to a well section is a simple procedure. Simply expand the Wells  Global well logs folder and click in front of a log to add. Let’s add the Gamma, Porosity and NetNonnet logs. One well in the section:

We have now added to the template also. There are multiple ways to open the template Settings: 

Click on the Open selected template settings page

icon



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

Under the Cross Sections  X‐section 1  Settings  Definition tab, click on the Show well section template settings button



Under the Templates pane, double‐click on the template name or right‐click and choose Settings

Bring up the template using one of the above methods (there might also be others). Under the Well section template tab, you can now see the log templates. These show the tracks in the well section in order. The Index track is the depth track.



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2. Change the track order to have the depth track between the Porosity and NetNonnet tracks. Do this by clicking on Index track (This shows the depth style (SSTVD, TVD, TVT, etc.) depending on what the section is in) and using the “down arrow”

to the left to place it in the correct position.

3. Clicking Apply or OK changes the well section.



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Color‐fill the logs Now, let’s color‐fill between the logs and the track edge. 1. Click on the Create/edit curve fill

icon on the Function bar

2. Click in a log track on the side of the log curve you want filled with color. The track is filled with color. The color comes from the template settings for that type of log. 3. Also, fill the other log. Note that all the wells in the section have their logs filled.



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4. If you don’t want the color to go to the edge of the track, put the cursor at the point in the color‐fill where you want the color to stop and click again. All of this information about log color is stored in the template. 5. Notice that the logs don’t have the same minimums and maximums for the same logs in different wells.

6. Open the template and click on a log (not a track). The right side now has a Limits tab.



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7. Put a check in the box in front of either (or both) Min value and/or Max value. Then put the limits in the boxes to the right. Click Apply and all wells in the section will have the same limits. Do this for all logs that need to be compared “apples to apples”. Note: you must click Apply for each log. If you just move to the next one, the limits will be lost for the first log.

8. Here, limits for both Gamma and Porosity have been entered.



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Creating another Well Section Now, we will create a second Well section 1. Create another well section by clicking on Window  Well section window…

2. Again, you will see a panel to Select new well section template. Once more, let’s create a new cross section and a new template called in this case: X‐section 2 and Well section template 3.

If you check Show template settings, the template’s Settings dialog opens when you click OK. 3. Click OK and the new empty Well Section appears in the graphics area and also at the bottom of the Windows tab. A new Well Section fence appears under the Cross sections folder in the Input pane.



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We will add wells to this section graphically. 1. Create a new 3D window or clear all visualizations out of an existing 3D window. 2. Display the Wells in the 3D window 3. Use “Tile Horizontal” to be able to see both the 3D window and the Well Section at the same time. (If other windows are also active, de‐activate them so only the 3D window and the Well Section are active. Then press “Tile Horizontal” again).



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4. Activate the process Stratigraphy  Well correlation.

This adds an icon to the Function bar. Press the Add hinge to the active well section

icon

5. With the 3D window active, click on the wells in the order you want them added to the section. (You must click on the well path of the object. Selection can be difficult if the well paths are very thin or there are many wells. You might have to make the Pipe width larger under Wells  Settings  Style  Path in order to be able to accurately pick the wells). As you pick the wells, you should see them appear in the Well section and also have the Well section fence appear in the 3D window. (Once again, if the wells are in the wrong order on the section, go to the Cross sections  X‐section 2  Settings  Definition tab and change the order. If you click on a well you don’t really want in the section, delete it from the section in the same place.) Petrel is a mark of Schlumberger


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6. Make the Well section cover the entire graphics area (in other words, get rid of the 3D window; we are finished with it).

Add logs to the new Well Section 1. Expand the Wells  Global well logs folder and click in front of a log to add. Again, let’s add the Gamma and Porosity logs. Again, set the limits for each of the logs. One well in the section:

We want to put the logs in the same track in this section. 2. Open the template using one of the methods described earlier. 3. Highlight the name of the Porosity log (not the Porosity track). Use the “Up Arrow” log into the Gamma track.

icon to move the



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4. Click Apply or OK to change the Well Section. You might want to delete the empty track (the old Porosity track).

Color‐Fill Between the Logs 1. Highlight the combined Gamma/Porosity track in the template Well section template 3 and go to the Curve filling tab on the right side of the template.

2. Click on the Add new curve filling

icon to add an object.

3. Make the Fill edge from Curve to Curve. Make the top curve Gamma and the bottom curve Porosity. 4. Choose a Fill style (positive) Pattern and Fill style (positive)  Fill color that you want for the type of data 5. Be sure the Box in front of Color fill is checked in order to see what you have done 6. Repeat choosing a pattern and color for Fill style (negative). Press OK



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Add Well Tops to the Section There are two methods for adding top picks to the section. Either 1. Put a checkmark in the box in front of the Well Tops file (like in previous versions), or 2. Bring up the template using any of the methods, right‐click on Borehole markers and choose Well Tops.



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3. Insert the Marker collection and click Apply or OK.

Turn on and off in the Stratigraphy folder any horizon you do not want on the section or any horizon you want on the section that is not displayed as you like.



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Add Graphics between the Wells We may also add graphics between the wells. 1. Bring up the template on the 2nd well section (the one with color‐fill between wells). 2. Highlight the Well tops (not the Borehole markers folder) and go to the Symbols and labels tab on the right side.

3. Put a check in the box for Show color fill at zone level and click Apply or OK. If the level is set to (max), the highest level zone will be filled. If it is set to “1”, only level 1 zones will be filled, etc. Below is a picture with the level set to (max). 4. For other backgrounds, right‐click on the Background track: Petrel is a mark of Schlumberger


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a. Choosing Seismic lets you choose a seismic cube and, using the blue arrow, enter it into the Definition sub‐tab for the Background. (Be sure to enter it into the correct domain area: time or depth):

This gives you a seismic background when you click Apply or OK Petrel is a mark of Schlumberger


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b. Choosing Property allows you to display a property. Before choosing the property, you must choose the Template and 3D grid to use.

Choose the type of property and then use the Up and Down blue arrows to position the properties to your liking: Petrel is a mark of Schlumberger


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Clicking Apply or OK displays the property.

c. You may also display other objects using similar methods.

Experiment with Templates We have now made two Well sections using different templates. Now, we will see what can be done with the templates. 1. Make sure the second Well section is active (the one with the two logs in the same track). 2. On the Tool bar at the top of the section, click on the black triangle to the right of the template name. You will see all available templates.



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3. Choose Well section template 2. The Well Section changes to the other template, but using the wells from this section. Change to the Petrel‐supplied Signatures template

4. Return to the template we built: Well section template 3. 5. Now, make the first Well section we built active. This uses Well section template 2.



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6. Pick a new template, the Petrel‐supplied Core template.

7. Check out other Petrel supplied templates also. The complete list of templates can be found in Templates  Well section templates. In the sample project, this list now looks like:

Conclusion We have generated two sections with templates and experimented with Petrel supplied templates. This is just a sample of what can be done in Well Sections in Petrel 2013. The goal here was to show some of the things that can be done with templates. These changes make templates a powerful tool that is easy to use (once you have learned how). They are saved to the Petrel project just like all other data is saved. Templates can be moved from one project to another using File  Reference project tool which makes them easy to transfer from one team member to another or from a finished project to a new one.



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