DETERMINATION OF OIL SATURATION IN RESERVOIR ROCK USING PARAMAGNETIC NANOPARTICLES AND MAGNETIC FIELD

摘要

Methods for detection of the presence and distribution of oil in subsurface formation are described herein. The present invention involves injection of an aqueous dispersion of the nanoparticles into the potentially oil containing subsurface formation, followed by a remote detection of the oscillation responses of the nanoparticles in the oil/water interfaces in the reservoir rock by applying magnetic field.

主权项

1. A composition comprising:
one or more coated paramagnetic nanoparticles, wherein the paramagnetic nanoparticles are coated with a polymer, a surfactant or any combinations thereof adapted for a downhole administration; and a fluid comprising the one or more coated paramagnetic nanoparticles, wherein the fluid is selected from the group consisting of water, hard water, brine, and any combinations thereof, wherein the composition is operable for detecting a presence, measuring a distribution or both of an oil or a hydrocarbon in a subsurface formation.