Well Paths

ResInsight can import well paths from simple Ascii files. In addition, ResInsight is able to retrieve well paths from an Equinor internal web service.

ResInsight also supports creation of your own user-defined well paths. See Create Well Paths

Ascii Well Paths

The command File -> Import -> Well Data -> Import Well Paths From File will read the well paths in the selected file, and create one entry for each well path under the Wells item in the Project Tree.

The supported ASCII format is quite flexible but the main requirements are:

  • Each data line must contain four numbers: X Y TVD(MSL) MD(RKB) separated with white-space.
  • Lines starting with "--" or "#" is considered to be comment lines
  • A line starting with none-number-characters are used as a well name after the following rules:
    • If the line contains a pair of : "'", "`", "´", "’" or "‘" the text between the quotation marks is used as a well name.
    • If the line contains the case insensitive string “name” with an optional “:” after then the rest of the line is used as a well name.
    • If there are no quotes or “name”’s, the complete line is used as a well name.
    • If there are several consecutive name-like lines, only the last one will be used
  • If a well name is found, a new well is created and the following data points are added to it.

Example 1:

6507.1  725 2542    2590
6523.5  757 2549    2626.6
6523.5  760 2559    2637.1
550.7 1020.2  2410   2410
551   1004.1  2422.2 2430.2
555.2  993.9  2425   2441.6

Example 2:

Name Well_1
6507.1  725 2542    2542
6523.5  757 2549    2578.6
6523.5  760 2559    2589.1

-- A Comment new well
This is not its name
Name Well_2
550.7   1020.2  2410    2520
551 1004.1  2422.2  2540.2
# a comment inside the data 
555.2   993.9   2425    2551.6

5507.0  4638.5  0.0 0.0
5507    4638.5  1628.6  1628.6

Well Path Files are Referenced

The well path data is not copied into the ResInsight project as such. The project file only stores the file path, and the next time you open the project, ResInsight will try to read the well data from the file again.

If the well path file is changed and you would like a running ResInsight to update accordingly, you will need to delete all the well paths that emerge from that file, and import it again.

Importing from SSI-Hub (Internal Statoil Web-service)

In order to import from SSI-Hub, a project file must be present and stored to file. All imported well paths from the web service will be stored relative to this project file location. If no project file exists, the menu item is disabled.

The command File -> Import -> Well Data -> Import Well Paths From SSI-hub launches a wizard to guide you through the process of selecting the well paths you need.

Access to web service: The import of well paths is using a web service. If you are a Statoil employee, make sure you have access to “EDM Landmark” and “EDM Compass”.

After completing the wizard, the wells imported are accessible as Items under the Wells item in the Project Tree.

The well path data is not copied into the ResInsight project as such, but is stored in files in a directory called ProjectFileName_wellpaths in the same directory as your project file.

Well Path Visualization

All the imported well paths are available below the Wells item in the Project Tree.

The visible wells are always shown in all the 3D Views in the complete project, so the toggles and settings control the overall project visibility of the Well Paths. The Property Editor of the Wells item is shown below

  • Global well path visibility – This option forces the well paths on or off, ignoring the individual settings unless it is set to Individual.
  • Clip Well Paths – This option hides the top of the Well Paths to avoid displaying the very long lines from the reservoir to the sea surface.
  • Well Path clipping depth distance – This number is the distance from the top of the reservoir to the clipping depth.

Individual Well Path

A well path will hold well log data and well path data imported from files. A well path file is placed inside the well path item, while one or more well log files are placed as child items under the well path in the project tree.

Importing Well Log Files

Well log data is usually imported from LAS-files (*.las). LAS-files can be imported using the command: File->Import-> Well Data->Import Well Logs from File.

ResInsight will look for the the well name in the imported LAS-files among the existing Well Paths. If a match is found, the LAS-file is placed as a child of that well path. If not, a new empty well path entry is created with the imported LAS-file under it. A well path may have more than one LAS-files as children.

If the LAS-file does not contain a well name, the file name is used instead.

Moving LAS-file

If ResInsight’s automatic well matching fails and a LAS-file is matched with the wrong well path, it is possible to move the LAS-file to the correct well path. Select the LAS-file right-click menu click Move LAS File to Well Path and select destination well path.

Look for an Existing Well Path

Well log names may vary slightly among different files from the same well. When importing a well log file or a well log path file, ResInsight have to look for an existing well path item to ensure that the well log data and well path are imported to the correct well path item. The lookup is based on name comparison this way:

  • First remove any prefix (like xxxxx1111/1111- or xxxxx1111/1111_)
  • Then try an exact name match
  • If not found, try to match the names ignoring all spaces, dashes and underscores
  • If still no match, no existing well was found and a new one is created

Well Path Property Editor

The well path property editor lets the user control the appearance of the well path and associate the well path to a simulation well. It also gives some information about the well path metadata.

  • Appearance group – Settings in this group affect the well path appearance in the 3D view
  • File group – Information about the well path file
  • Simulation Well group – Associated simulation well. ResInsight will try to associate each well path with a simulation well. This is done in the exact same way as looking up an existing well path. If the auto-association fails, the user can set the correct simulation well here.
  • Well Info group – Metadata for the well path
  • Well Picks group – Information about imported well picks file containing data for the current well path

Casing Design

Some Casing Design elements can be assigned to the well path by selecting Create Casign Design from the right-click menu of the well path.

This will create a new child object for the Well Path, named Casing Design. In the Casign Design Property editor well path containment properties such as Casing (with Casing Shoe) and Liner can be added to the well path along with a start and end depth and a diameter.

These can be visualised in the 3D View and Well Log Plots on a Well Log Track.