Geochemical evaluation of sedimentary rocks and hydrocarbon fluids in the Amistad offshore field, Progreso Basin Province, Southwest Ecuador

Gravity-driven large-scale deformation system in the Tumbes-Guayaquil forearc basin, Northern Andes (Northern Peru-Southern Ecuador)

“…1). The complex structural architecture and petroleum systems of this frontier forearc region have been strongly studied by academic and petroleum industry through numerous seismic reflection and exploration well data (e.g., Benitez, 1995;Deniaud et al, 1999;Deniaud, 2000;Collot et al, 2002;Higley, 2004a, b;Calahoranno, 2005;Fernández et al, 2005;Witt et al, 2006;Cobos, 2010;Espurt et al, 2018;Reynaud et al, 2018;Aizprua et al, 2019;Lemgruber-Traby et al, 2020;Guzmán et al, 2022;Márquez et al, 2022). These studies show that the Tumbes-Gulf of Guayaquil forearc basin is characterized by: (1) a massive Cenozoic prograding sedimentary infill containing ductile basal shale layers (Higley, 2004a,b;Espurt et al, 2018); (2) a large crustal-scale strike-slip fault zone, the Puná fault zone that crosses obliquely the forearc basin, leading to significant transtensional deformation favoring available space and sedimentary trapping in the forearc basin (Benitez, 1995;Deniaud et al, 1999;Deniaud, 2000;Cobos, 2010).…”