Reservoir Surveillance with studioSL

Within studioSL, a surveillance project allows you to quickly import production/injection data and then compute flow-based well rate allocation factors, injector patterns, and conformance plots. Because streamlines are computed from well rates and locations, the identification of well-pairs and calculation of flow rates between well pairs (allocation factors) are based on historical flow considerations rather than just geometrics. Furthermore, this calculation is updated for each timestep that you have data for meaning that the allocation factors and well-pairs can vary in time.

For more information on the methodology of streamline-based surveillance see here.

Surveillance within studioSL

The surveillance workflow is part of the basic functionality of studioSL, requiring a studioSL license and a 3DSL license. For a list of prices on studioSL and 3DSL see here. The workflow will guide you through the basic steps of importing well production data, creating a simple grid and flow model, computing the streamlines, and lastly visualizing allocation factors and injector efficiencies.

Import Well Production Data

As a minimum historical well production data, well paths, and completion events are required. Data formats supported can be from OFM, geoSCOUT, Eclipse SCHEDULE, or general ASCII formats. The Well Data Import Tool will then create a file suitable for surveillance or simulation.  Once production data has been imported and a simulation file has been created, it can then be viewed and QC'd on a field-wide basis or an individual well basis.
studioSL's Well Data Import Tool Oil and water production for a field.

Creating the Surveillance Flow Model

Once the well production data has been imported, studioSL can automatically wrap a simple box grid around the well perfs to create a simple flow model on which streamlines are then computed. Alternatively, more complex grids created in Petrel or Gocad can be imported within the studioSL Deckbuilder wizard.  Streamlines connecting each well can then be computed on the underlying grid, based on the well locations and each well's historical voidage rate. This calculation is repeated at each timestep production data exists for.

Well paths, perforations, and a simple 2D grid automatically generated in studioSL. Streamline paths associated with each injector.

The final step of the surveillance workflow is to convert the streamline information into flow-based well rate allocation factors and the injector efficiency plot. Allocation factors can also be exported back to OFM using the .pat file convention. See our surveillance technology page for example images.