Detecting a tracer in a hydrocarbon reservoir
AssigneeSaudi Arabian Oil Company
InventorsSehoon Chang, Wei Wang, Shannon L. Eichmann
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Abstract
The present disclosure describes methods and systems for detecting a tracer in a hydrocarbon reservoir. One method includes injecting a tracer at a first location in a reservoir, wherein the tracer mixes with subsurface fluid in the reservoir; collecting fluid samples at a second location in the reservoir; mixing a magnetic surface-enhanced Raman scattering (SERS) particle with the fluid samples; applying a magnetic field to the mixed fluid samples; and analyzing the fluid samples to detect a presence of the tracer in the fluid samples.
Claims22
1-20. (canceled)
A method for synthesizing magnetic surface-enhanced Raman scattering (SERS)-active nanoparticles, comprising:
- synthesizing a plurality of superparamagnetic Fe3O4 nanoparticles;
- coating the plurality of superparamagnetic Fe3O4 nanoparticles with SiO2 to generate Fe3O4@SiO2 particles;
- and
- synthesizing the magnetic SERS-active nanoparticles by attaching Ag nanoparticles to the Fe3O4@SiO2 particles.
A magnetic surface-enhanced Raman scattering (SERS)-active nanoparticle, comprising:
- a non-magnetic particle shell that is decorated with an Ag particle;
- a magnetic core particle that is incorporated into the non-magnetic particle shell, wherein the magnetic core particle comprises Fe3O4@SiO2 particles;
- and
- wherein the magnetic SERS-active nanoparticle is synthesized using triethoxysilane.
Dependencies are inferred from the claim text.