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MRF Magnetic Resonance Fluid Characterization

Overview Library

Improve reserve estimates with advanced fluid characterization

MRF magnetic resonance fluid characterization lets you identify and analyze hydrocarbons. A patented technique integrates downhole data acquisition and wellsite inversion with a multifluid response model to determine

  • fluid saturations
  • fluid volumes
  • oil viscosities.

With the MRF method, you can directly detect hydrocarbon in

  • fresh, unknown, or varying formation water resistivities—where Archie resistivity analysis is difficult
  • low-resistivity, low-contrast pay and thin beds.

The MRF method also overcomes incorrect permeability calculations caused by hydrocarbon effects.

Lithology-independent formation porosity and separate T2 distributions for brine and oil also are extracted. Hydrocarbon-corrected bound-water volume and permeability are computed from the T2 distributions. This real-time analysis is vital for completion decisions.

Advanced fluid characterization using the MRF method is available worldwide. MR Scanner service or any CMR tool can be used for data acquisition. Specially equipped tools or modifications are unnecessary.

Benefits

  • Improved reserves estimates and increased reserves from location of bypassed pay
  • Optimized well completions
  • Real-time answers from automated wellsite inversion
  • Independent analysis without need for resistivity measurements, Rw, or Archie parameters

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Figure 1. Example of real-time MRF analysis performed at the wellsite. The direct, user-friendly analysis provides a comprehensive formation evaluation of the near-wellbore region and includes quality control indicators.Figure 2. Small or light-end member molecules move quickly; heavier long-chain molecules move more slowly. Hydrocarbon molecule relaxation rates and diffusion coefficients are related to the molecule size. With their wide range of molecular sizes, crude oils have a broad distribution of nuclear magnetic resonance (NMR) relaxation times and molecular diffusion coefficients. The Constituent Viscosity Model (CVM) relates molecular diffusivity and T2 relaxation of the individual components to bulk viscosity.
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