03108nmc a2200265 4500 20260520171004.0 260224s xxu 068.82 553.28 C62 15730 Carpinelli, Aldo 61108 Zurita, Enrique 61109 Valderrama, José Manuel 58516 Soto, Luis 61110 Radic, Juan Pablo 61111 Agurto, Cristóbal 61088 Sánchez, Jesús 23854 Congreso de Exploración y Desarrollo de Hidrocarburos (11er : 2022 nov. 8 - 11 : Mendoza) 61064 Exploración y Sistemas Petroleros EXPLORACIÓN Y DESARROLLO EN COMPLEJOS TURBIDÍTICOS DEL PALEOCENO TARDÍO - EOCENO MEDIO EN LA CUENCA DE MAGALLANES, CHILE 21/04/2023 ; 20/04/2023 22 p. ; 549-570 Cahuil gas field is the first known commercial gas/condensate field of a new exploration play in the Magallanes Basin, associated with Paleocene turbidites from north and east provenance. It was discovered in 2016 north of Magellan Strait and 12 wells have been drilled in it, which has shed interest to expand the exploration on similar leads. Reservoir distribution follows north-east axial direction reaching 20 km in length and 1-3 km in width. The reservoir is composed of quartz-feldspathic lithic sandstones, with shale volumes lower than 25% and mainly constituted by chlorite. Known gross thicknesses are 10-70m, effective porosity is 15-20%. Permeability is 0.02-0.83 mD and average water saturation is 59%. Deposition of the reservoir took place as a superposition of NE oriented channels along a narrow, sandy mudstone submarine ramp. Avulsion and faulting of turbidite channels resulted into internal complexity of the reservoir, which was generically termed "Complejo Arenoso del Grupo Bahía Inútil" (Sandy Complex of Bahía Inútil Group, or CABI). The hydrocarbon trap for this play is mixed structural-stratigraphic, associated to the west-dipping, regional monocline produced by the compressive foreland tectonic phase of the basin, which started in the Late Cretaceous. Local structure of the Cahuil Gas Field is caused by transcurrent tectonics since the Late Oligocene until present day. Hydrocarbon migration and trap charge seem to have been controlled by subvertical fault conduits, connecting Early Cretaceous source rocks to Paleogene and Neogene reservoirs. The Cahuil Gas field is regarded as a tight gas sand reservoir and the original production pressure is 7200 psi. Gas production is improved by hydraulic fracturing which is responsible of initial gas rates (under controlled conditions) of 180-250 Mm3/d, and gas to condensate ratios of 6000-10000 m3/m+. Systematic gas rate and pressure measurements allowed to perform rate transient analysis and the construction of simulation of production models based on geologic and geophysical data https://biblioteca.iapg.org.ar/ArchivosAdjuntos/Conexplor2022/Expl-y-sist-Petroleros/explora29.pdf CONGTP ddc 195631 195631 0 0 0 0 263350 BVIAPG BVIAPG 068.82 553.28 C62 15730 2026-03-06 200068045 0 068.82 553.28 C62 15730 200068045 2026-03-06 00:40:42 2026-03-06 ARCHIVO