The Piedemonte oil and gas field is located in the foothills of the Eastern Cordillera, a fold-thrust belt in the northern Andes of Colombia. Oligocene to recent, east-west shortening has created complex thrust structures that significantly affect the petroleum system and has created one of the most productive thrust traps in the world. Published thermochronological results from samples at outcrops indicate that exhumation started about 10 Ma in the Monterralo and Morro anticline. The objective of this proposal is to provide a revised integrated structural interpretation of the Piedemonte field using: 1) interpretation of 3D seismic reflection data tied to well logs; 2) use of apatite fission track and vitrinite reflectance data from samples extracted from key well cores of the Pauto, Florena, Dele, and Volcanera thrust sheets to improve reconstructions of the thermal history of the fold-thrust belt; and 3) restoration of all structures and productive reservoir units to their pre-deformed state. The restored strata sections across the field will provide critical information on the locations and structural repetitions of the thickest reservoir units. Thermochronologic analysis on core samples will define the timing of thrusting and its effects on the petroleum system of the Cordillera Oriental.