Silica Particles Mobility Through Fractured Rock

Functionalized particles are being investigated as a potential tool to measure temperature distribution in fractured reservoirs. Acquiring reservoir temperature data within the formation could be used to correlate such information to fracture connectivity and geometry. Existing reservoir characterization tools allow temperature to be measured only at the wellbore. Temperature-sensitive nanosensors would enable in situ measurements within the reservoir. Such detailed temperature information enhances the ability to infer reservoir and fracture properties and inform reservoir engineering decisions. This study provides the details of the experimental work performed in the process of developing temperature nanosensors. Specifically, silica particles mobility through fractured media was investigated. Experimental results showed that the recovery of the particles was dependent on the particle size and suspension concentration. The particle size has a direct effect on its recovery. The controlling mechanisms for transport of silica particles were identified. Among all, transport by gravitational sedimentation (gravity settling) was prominent. Results also showed that the existence of the fracture facilitated the particle transport. Particles were found to flow with the fast-moving streamlines within the fracture.