About Seequent, Bentley, and Volsung
Volsung and Gudrun are developed by Seequent, a Bentley company.
For an overview of Bentley services used across Seequent products, including Bentley account sign in and MySeequent, see the Bentley portals overview.
Before you begin
To run Volsung or Gudrun, you need:
- A Bentley account
- Bentley Connection Client (Windows only)
- Sign in to MySeequent using a Bentley account (required once)
How you get started depends on whether the application is already installed on your machine.
- If you already have Volsung or Gudrun installed, use the maintenance tool to update and follow the in‑app prompts to complete the setup
- If you are a new user, follow the steps on this page to create a Bentley account, set up access, and install the software
If you already have Volsung or Gudrun installed
This is the recommended path for existing users.
Open a Volsung application (such as Brynhild or Gudrun) and then click on Help: Update from the menu bar to run the maintenance tool to update to the latest version.
During the update, you’ll be guided through the required steps, which includes:
- 1. Updating to the latest software version
- 2. Downloading and installing Bentley Connection Client (Windows)
- 3. Creating a Bentley account and signing in to Bentley Connection Client
If you get stuck, you can pick up where you left off using this guide, or contact [email protected].
If you are new to Volsung or Gudrun
Follow the steps below to install the software and complete sign in.
- Create a Bentley account using the email address associated with your Volsung licence
- Go to MySeequent and choose **Sign in with Bentley**
- Sign in using your Bentley account, then download Volsung from: https://my.seequent.com/downloads/volsung/latest
- Installation includes Bentley Connection Client (Windows)
- Launch Volsung by opening a Volsung application such as Brynhild or Gudrun
- When Bentley Connection Client opens, sign in using the same Bentley account
- After this, Volsung applications can be opened and used as normal
Bentley account
If a Bentley account does not already exist, one can be created. Account creation includes:
- Email verification
- Acceptance of Bentley terms and conditions
Bentley account registration is available at: https://connect.bentley.com/
When creating a Bentley account, use the email address the Volsung licence was issued to.
Bentley Connection Client (Windows)
On Windows, Bentley Connection Client is required.
You must:
- Install Bentley Connection Client, and
- Sign in to it using your Bentley account
Bentley Connection Client:
- Manages Bentley account authentication for Volsung
- Prompts you to sign in if you are not already signed in
- Prompts acceptance of Bentley terms and conditions on first sign in
- Opens automatically when Volsung is launched, if required
You do not usually need to open Bentley Connection Client manually.
If it is required, it will open automatically and guide you through sign in.
Bentley Connection Client is included with Volsung 2026.1; however, it can also be downloaded from
Linux users
Bentley Connection Client is not used on Linux.
When Volsung is launched on Linux:
- A web browser opens automatically
- You are asked to sign in with a Bentley account
- After sign in is completed in the browser, Volsung continues running
No separate client installation is required
MySeequent sign in
You must sign in to MySeequent with a Bentley account at least once to access Volsung.
New users do this when signing in to MySeequent to download Volsung.
Existing users may be prompted to sign in during the in-app update or first launch.
After signing in with a Bentley account, Volsung can access your licence and will open normally on future launches.
IT and network considerations
Some organisations restrict network access for sign in and licence verification. This section is intended for users who may need help from their IT team.
IT teams may need to allow access for:
- Bentley Connection Client
- Bentley account authentication
- Seequent entitlement services
On Windows, Bentley Connection Client must be installed locally, and users must be able to complete the Bentley account sign in process.
For Bentley platform‑specific troubleshooting, IT teams can also refer to Bentley’s support knowledge base (Bentley account sign in required).
Support
For help with sign in, licencing, or access:
- Contact [email protected]; or
- Contact a Seequent account manager
Commonly used Volsung Applications
- Brynhild – simulator for building models and running forecasts
- Gudrun – wellbore simulator
- Signy– thermodynamic table tool
Running Volsung
After Volsung has been installed and access has been set up:
- Open the Windows Start menu and begin typing the name of the application (for example, Brynhild, Gudrun, or Signy)
- Select the application to launch it
For users who are new to Volsung reservoir modelling, Brynhild is the recommended starting point.
Licence access
Volsung requires users to sign in before the software can run, using Bentley Connection Client on Windows or a web browser on Linux.
What happens when you open Volsung
- Volsung starts and checks whether Bentley Connection Client is signed in
- If not, Connection Client opens and asks you to sign in
- Once signed in, Volsung opens and runs
On Linux
- Volsung opens a web browser
- You are asked to sign in with a Bentley account
- After signing in, Volsung continues running
If Volsung does not open
If Volsung starts but access is not available, check that:
- Bentley Connection Client is installed and signed in
- You have signed in to MySeequent using a Bentley account at least once
On Linux
- Bentley account sign in was completed successfully in the browser
- The same Bentley account has been used to access MySeequent
Once signed in, Volsung will open normally.
Tutorials and examples
To explore Volsung workflows, two example projects are available.
Rectilinear model
A synthetic project built from William B Cummings’ (Cummings and Mackie 2010) conceptual model of a generic geothermal system.
This example includes:
- A reservoir model
- A surface network
- Fully coupled wellbore models
- A forecast simulation
Download Rectilinear Volsung model and open it in Brynhild to begin.
Leapfrog workflow model
This project demonstrates a workflow linking Leapfrog and Volsung.
It uses:
- Leapfrog output files (.lfm and .ts)
- A Volsung numerical model built from those inputs
The model is not calibrated to temperature or pressure data but shows how Leapfrog and Volsung models connect.
Download Leapfrog workflow model and open it in Brynhild to begin.
The associated Leapfrog model can be viewed in a WebViz public scene.
Watch the Tutorial Videos
Getting started with Volsung: Simple 2D Reservoir Model
Getting started with Volsung: Simple 3D Reservoir Model
Getting started with Volsung: Wellbore Modelling