Abstract
A time-field search method was proposed for AE event source location, combining the grid search method and the database technique. Theoretical process was given, and laboratory hydraulic fracture stimulation experiments under true-triaxial confining stresses were performed to prove the practicability of the method. A regional velocity model with variable wave velocities and directionality was required to fit observations. The location results showed that time-field location method obtains the global optimal source location solution with a relatively high efficiency and accuracy.
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source location results. Red events—primary fracturing, green events—re-orientation fracturing, blue events—secondary fracturing
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Acknowledgments
We express our gratitude to the National Natural Science Foundation of China (51774020). Data and scripts used in the production of this document are available upon reasonable request to the corresponding author. The experimental work was supported by Colorado School of Mines. This support is gratefully acknowledged.
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Wu, S., Gan, Y., Hampton, J. et al. A time-field search method for AE source location with a regional velocity model. Acta Geophys. 68, 1335–1344 (2020). https://doi.org/10.1007/s11600-020-00469-2
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DOI: https://doi.org/10.1007/s11600-020-00469-2