Field-Wide Information Visualization in Symmetry
One requirement when simulating large gathering systems is to quickly identify locations that may require intervention or a modification in their design or development. Summarizing this information and presenting it to managers or field staff for discussions on action is a significant consideration, as well. Features have been developed in Symmetry’s Field Workspace to assist the user in performing such field-wide analysis by providing the ability to easily visualize results across the entire system. This article will highlight two of the features including:
- Segments Color Map
- Node and Segment Callouts
Segments Color Map
Visualizing and summarizing pipe segment data across large gathering systems can be cumbersome if a bird’s eye view approach is not employed. However, in doing so, such an approach doesn’t help unless the data can be presented in a format that allows the information to be conveyed at a glance. Once an area of interest is identified, the user should be able to zoom in for a more detailed look.
The Segments Color Map helps the user visualize pipe segment information by color coding the pipe network for user-selected variables. This allows changes in that data to be quickly identified and easily communicated. Such information can be data input by the user such as pipe diameter or results calculated by the simulator such as pressure drop gradient or corrosion rate.
Upon entering or calculating the information, the user simply selects the Network tab from the display control then chooses a variable they wish to color code from the Source Data dropdown in the Segments Color Map pane.
This will result in the pipe segments being color coded according to the range of values in the current time step.
The user has instant feedback about where in the system issues could arise. In the above image, the highest corrosion rate is indicated in red and should trigger an investigation into why that is and what to do about it.
The range is selected from the minimum and maximum values in the time step the color coding was activated in but can be modified by the user. For example, the Max could be set to a Corrosion rate of 1 mm/yr so everything above that gets colored red rather than just the pipe that is close to the max which could be those only with a Corrosion Rate ~ 2.7 mm/yr for this example.
The user can reset a modified range back to the min/max of the time step by clicking the button.
If the user has generated a forecast, they can scroll through the time steps or use the Time Step Player to see how the values (colors) change with time and different field development scenarios.
By default, an 11-color spectrum is used but the user has the option to choose a spectrum from 2 to 11 colors.
Use of the Segments Color Map allows instant visualization of pipe data across the entire field. This expedites the understanding of what is occurring in the system and what actions to take. It provides an easy method to communicate such information to stakeholders for discussions on courses of action.
Node and Segment Callout
With a bird’s eye view of a large gathering system, displaying information for pipe segments can lead to obscuring the system with hundreds of labels. This problem is compounded if multiple variables are displayed simultaneously.
Generally, there are a smaller number of nodes and segments of interest the user wishes to see at a high level across a gathering system. Callouts were created so the user can label specific nodes and segments and hide all other labels, thus reducing the potential for obscuring information on the map screen.
On the map screen, the user right clicks and selects Labels Mode. They can then just left click on a node or pipe segment and drag a callout to the desired position.
The variables for the callouts are selected in the Node Labels and Segment Labels pane of the Network tab in the display control. They are the same as those selected for the individual node and pipe segments. The difference is that the callouts will stay visible when the highest branch on each of the Node Labels and Segment Labels trees are un-selected.
The properties of the Callouts can be customized, allowing the user to choose the font, font size, and color scheme. While still in Label Mode, double click the Callout to open the Labels Properties window and make the desired changes.
When the Callouts are positioned in the user’s desired location in the bird’s eye view, they will remain in that relative position as the user zooms in and out.
The user can place Callouts at nodes and pipe segments of interest and quickly obtain the specific values of desired data at a glance across the entire model. The values are updated as the user changes time steps, expediting understanding of what is occurring across the gathering system while minimizing obscuring the map view. This permits faster communication of information from the model.
The features presented allow the user to quickly consume the information provided by the model across the entire system. This permits the user to expedite the understanding and communication of the information to stakeholders for additional action-based discussions to occur.
Please contact your local VMG office for more information.
Gordon Slemko, P. Eng., VMG Calgary