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An operator in the North Sea wanted to determine the petrophysical characterization of the field to map the level of H2S concentrations and to predict the reservoir’s behavior during production. One of the concerns was taking the samples with low enough contamination for accurate pressure/volume/temperature (PVT) testing.

Baker Hughes, a GE company (BHGE), had been using the Reservoir Characterization Instrument™ (RCI) service exclusively in a well development sampling campaign for this operator as its titanium construction minimizes loss of corrosive gases and compounds when sampling. The tool’s nickel alloy sample chambers reduce the adsorption of corrosive gases and compounds ensuring that PVT measurements within 10% are possible, which eliminates the need to perform additional expensive and time-consuming well tests.

The In-situ Fluids eXplorer™ (IFX™) system was used to determine the contamination levels when sampling by determining the density, viscosity, and sound speed stability measurements.

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Challenges & Results


  • Long sampling times due to optical density masking actual sample contamination


  • Analyzed gradients and fluid composition
  • Obtained fluid samples with minimal contamination
  • Collected real-time density, viscosity, gas-to-oil ratio, and sound speed measurements