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US 10,761,157 B2Granted
Analyzing fluids in core samples contained in pressurized NMR core holders with 1H and 19F NMR
AssigneeHalliburton Energy Services, Inc.
InventorsSonghua Chen, Donald Clifford Westacott
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Abstract
Pressure coring where the core apparatus drills the core sample and seals the core sample at its native downhole pressure (e.g., several thousand psi) may be expanded to include nuclear magnetic resonance (NMR) imaging components to produce a pressurized NMR core holder that allows for NMR imaging of the core samples having been maintained in a downhole fluid saturation state. NMR imaging performed may include 1H and also 19F imaging depending on the chamber fluid used in the pressurized NMR core holder.
Claims14
A method comprising:
- collecting one or more core samples from a subterranean formation with a coring tool coupled to a pressurized nuclear magnetic resonance (NMR) core holder;
- placing the one or more core samples in the pressurized NMR core holder comprising one or more NMR coils and containing a fluid;
- retrieving the pressurized NMR core holder from the subterranean formation where the one or more core samples are at a downhole fluid saturation state;
- performing 1H NMR measurements on at least one of the one or more core samples in the pressurized NMR core holder at the downhole fluid saturation state;
- and
- deriving one or more properties of the at least one of the one or more core samples based on the 1H NMR measurements.
3 more elements
Dependencies are inferred from the claim text.