Fractional Flow Testing
Yet another innovative extension of SWCT testing is fractional flow measurement.  By first measuring connate water saturation via a SWCT test and then injecting a bank of water conveying three partitioning tracers we can combine the two tests and measure Fractional Flow of oil.   During
interpretation of the two tracer test results, a good estimate of the Corey function exponents is gained as well.  

As in the case of all SWCT testing methods:
Non-destructive, in situ method for measuring fractional flow and relative permeability.
Deep investigation
Results typically represent hundreds of barrels of pore space in the test zone.
Native State
The tracers operate in native-state wettability pore space contacting live crude oil, live water at reservoir temperature. The problems that make laboratory measurement of these parameters difficult are easily overcome by carrying out the measurement in situ.

In Situ Oil Fractional Flow Data Can Provide Direct Input to:
  • Water Flood performance prediction
  • Reservoir Modeling
  • Reservoir Characterization

Operational Steps of the Single-Well Tracer Test Method for Measuring Fractional Flow of Oil
1. Select 100% oil producing well in zone of interest.
2. Inject a small volume of water carrying three ester tracers and push volume.
3. Shut-in well for short reaction period
4. Produce well and analyze fluids for tracers and oil cut.