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Saturn 3D Radial Probe for Fluid Sampling and Pressure Measurement

Multiple self-sealing ports extract fluid from around the borehole wall, not funneled to a single probe

With a total surface flow area of 79.44 in2—a 1,200% increase over the largest conventional single-probe formation tester—the Saturn 3D radial probe extends formation testing to previously inaccessible fluids and reservoir environments:

  • low-permeability formations
  • heavy oil
  • unconsolidated formations
  • near-critical fluids
  • rugose boreholes.

Quickly establishing uncontaminated fluid flow

The drain assembly of the Saturn 3D radial probe positions four self-sealing suction ports at 90° intervals against the borehole wall to pull fluid circumferentially from the reservoir, instead of funneling it to the single access point of a conventional probe. Because fluid is extracted across a large reservoir volume, flow is readily induced and sustained for viscous fluids and in low-mobility formations or uncemented matrix. Filtrate is quickly removed to draw in uncontaminated formation fluid for downhole fluid analysis (DFA) and sampling.

Pressure testing at low mobility and low permeability

The Saturn 3D radial probe can perform pressure tests at mobilities as low as 0.01 mD/cP. The improvement in testing efficiency over conventional probes is distinct at mobilities of 500 mD/cP, with the performance gap expanding as the mobility decreases. At 10 mD/cP the Saturn probe is an enabling technology because even an extralarge-diameter conventional probe cannot move the formation fluid. With minimal storage volume effects and greatly reduced susceptibility to supercharging, the Saturn probe brings unprecedented pressure-testing capability to very tight formations.

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Clean 7.5-API Oil Retrieved from Friable Sandstone

Saturn 3D Radial Probe
The Saturn 3D radial probe collected an uncontaminated sample of 7.5-API oil from an unconsolidated sandstone reservoir in Mexico without sanding or seal failure. Read case study

More Than 500 Times Increase in Probe Surface Area

Saturn 3D Radial Probe
The larger flow area accessed by the Saturn probe makes it easy to flow heavy oils at low mobilities and from low-permeability reservoirs for fluid sampling and pressure testing.
View surface area comparison

See How It Works

Saturn 3D radial probe
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