Preparation and application of density controllable microspheres for isotope tracer monitoring in oil fields
Isotope tracer microspheres for oil field monitoring were prepared.The morphology,compressive strength,thermal properties,solvent resistance and processing performance of the microspheres were analyzed.The structure-activity relationship between microspheres and isotopic yield and processing performance was revealed.A method for calculating the density of tracer microspheres was proposed.The results show that the morphology of the tracer microspheres is composed of dense and loose ones.The influential factors of compressive strength are adhesives and feeding ways.The solvent resistance of the microspheres prepared by different adhesives are different.The tracer microspheres prepared by phenolic amine and polyamide perform excellently in compressive strength and thermal resistance.The isotope yield of microspheres obtained with carbon powder is higher.The density control of microspheres can be calculated by an empirical coefficient.
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