Reservoir Pattern Surveillance

Reservoir pattern surveillance is the grouping of wells into injector or producer centered patterns. Use studioSL to integrate well locations, injection/production history, and geology, into a material-balance flow model.  studioSL is the only industry software to offer a complete and robust solution for reservoir pattern surveillance.  The results include:

  • Flow-based well-pair rate allocation factors
  • Dynamic patterns - injector or producer centered
  • Quantify pattern injector efficiencies
  • Well-rate targets calculated in floodOPT that promote efficient vs. inefficient use of injected fluids
  • ROIP and pressure distributions using our StreamLine Region based Material Balance simulator (SLR-MB)
  • Rapid well-level forecasting based on machine learning

More Info: BrochurePricingSPE-Webinar, Surveillance Book, YouTube Videos

Support: Knowledge BaseTutorialsTraining

The Reservoir Pattern Surveillance Workflow


Well location and production history.  Import historical production, well locations (red & blue dots in image to the right), and perforation data from OFM, Petrel, geoSCOUT, AccuMap, Schedule Eclipse,POWERS, or CMG. Build a 2D pancake grid, or import Petra maps to build a 3D grid, or import a 3D geomodel from Petrel/Gocad.


Compute streamlines.With well locations, the injection and production history, and a grid defined, calculate the streamlines at desired times throughout history. The image to the left shows streamlines, as colored by originating injector, for a single time interval.

As surveillance does not involved the transport of fluids along the streamlines, calculations are fast and require only basic PVT input.


Flux Pattern Map. Collapse the streamline bundles between each well-pair and represent this as a simple stick connection. This is Streamsim's patented (US Patent 6,519,531) Flux Pattern Map to quantify the strength and the allocation factors between wells. Since streamlines change with time, so too will the FPmap, giving a dynamic pattern picture of your flood.  These maps can be combined for a range of timesteps to then represent average patterns and average allocation factors over the time range.



Injection Efficiency.  Once well-pairs are identified and the well-rate allocation factors are calculated, studioSL can summarize the performance of the injectors via an injector efficiency plot. Each point on the plot represents an injector and is associated with an offset oil rate produced on the y-axis. The IE-plot is powerful diagnostic of the efficiency of each injector in a field.

ROIP Distribution.  Given an Original Oil in Place (OOIP) distribution, apply our streamline region based material balance (SLR-MB*) simulator on each dyamic well-pair to generate a Remaining Oil in Place (ROIP) distribution at the end point of the production history.  This will highlight areas of low vs high ROIP as driven by the injection/production history.  

Shown on the right is a comparions between the OOIP and the ROIP after integrating all the historical production into per-pattern material balance calculations.  Red areas are high values, blue areas are low values, and purple areas are zero values where gas cap or water zones are located.

* SLR-MB is protected by US patent No. 10,726,173 B2



Well forecast Rapid Forecasting.  Using machine learning methods coupled to SLR-MB, historical well rates are correlated to local grid properties that change with time to compute individual well-level forecast of oil, water, and gas rates.  This is usefull for rapid forecasting of existing well base declines, shut-ins, reactivations, or producer-to-injector conversions.  Can also be used the floodOPT workflow to forecast the impact of new well rate targets that promote sweep and demote fluid cycling.


For a short white paper on field results with our technology, please see here.  See our knowledge base item for more information on a Flow-Based Surveillance model vs a Flow Simulation model here.


See our April 2008 SPEREE paper or our JPT Jan 2010 Distinguished Author article for additional technical details.

Contact in USA

Corporate Headquarters 
StreamSim Technologies, Inc.
865 25th Avenue
San Francisco, CA 94121

Tel: (415) 386-0165

Contact in Canada

Canada Office 
StreamSim Technologies, Inc.
Suite 102A - 625 14th Street N.W.
Calgary, Alberta T2N 2A1

Tel: (403) 270-3945

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