01892nam a2200241 4500 20260520010341.0 260224s xxu 068.82 553.28 C62 2014 0015581 Eventos microsísmicos anómalos en el monitoreo de la estimulación hidráulica de la Fm Vaca Muerta en Loma La Lata 15/05/2020 ; 29/03/2017 13 p. Anomalous microseismic events recorded during a hydraulic fracturing in Loma La Lata, Vaca Muerta formation Hydraulic fracture stimulation is being used in Loma La Lata field, Neuquén, Argentina for unconventional shale oil and gas main targets in Quintuco-Vaca Muerta units. This technology is complemented frequently with microseismic monitoring in order to better understand the geometry of the resulting fractures. In this paper a case study is discussed in which a set of anomalous microseismic events was observed after the end of the 5th stage of a hydraulic stimulation treatment. These events show: 1) higher magnitudes than the mean for a normal stage 2) distinct and isolated clustering of the events 3) time of occurrence after the end of the pumping program. The analysis of the available data suggests the reactivation of a previously existing fault as a possible cause of the unexpected events. CONGTP Pianelli, Luis 648 Coetsee, Fernando 645 La Vecchia, Juan 56307 Sánchez, Adrián 56308 Congreso de Exploración y Desarrollo de Hidrocarburos (9no. : 2014 nov. 3-7 : Mendoza) 54287 Simposio de Geofísica "La geofísica : puentes de integración" (2014 nov. 3-7 : Mendoza) 56096 190167 190167 https://biblioteca.iapg.org.ar/ArchivosAdjuntos/CONEXPLOR2014/Simposiodegeofisica/269-Eventos-microsismicos.pdf 0 0 0 0 257986 CBAAB CBAAB 068.82 553.28 C62 2014 0015581 2026-03-06 200062417 0 068.82 553.28 C62 2014 0015581 200062417 2026-03-06 00:20:16 2026-03-06 CONGTP