[AGE40-P19] Experimental Setup and Application of High-Precision Fiber Bragg Grating Sensors for Laboratory Core Flooding Monitoring
Keywords:Carbon Capture, Utilization and Storage (CCUS), Core flooding experiment, Fiber optical sensing
In this presentation, firstly we figured out the experimental setup of high-resolution fiber Bragg grating (FBG) Sensors in the laboratory core flooding experimental apparatus. Then, we conducted a series of deionization water and free-CO2 core flooding experiments on saturated sandstone core specimens under various reservoir conditions. We dynamically monitored the strain responses during the water and CO2 displacement processes by using three FBG sensor arrays along the axial and radial directions. Finally, we found that the relative strain increased throughout the experiment with the increase in the confining pressure or pore pressure. For the water flooding experiment, the proportions due to the rise of the sequestration pressures were different in each scenario and FBG arrays, and they showed generally positive increases, which can be ascribed to the effective pressure. Meanwhile, the initial arrival time of the precisely characterized strain histories revealed the fronts of the injected water as well as the detailed implications of the CO2 plume migration during the core-scale flooding processes.
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