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Mountain-front seismic acquisition and processing

BP Colombia

Carlos Duque

BP E&P Technology UK

Hector Alfonso

Ecopetrol Colombia

Elfriede Chalar and Daniel Pastore

CGGVeritas Argentina

Carlos Pedraza

Petroseis Colombia

Corresponding author: jaime.checa{at}bp.com

Abstract

This paper describes how BP and its partners successfully acquired 450 km² of 3D seismic data in a complex area of the Llanos Foothills in Colombia. The data will be valuable for future decisions regarding the development of the Florena, Pauto, and Volcanera fields. The work area is in the Piedemonte Llanero, in the foothills of the Cordillera Oriental of Colombia. The stratigraphy involves Paleozoic, Cretaceous, and Tertiary rocks, and multiple regional unconformities. The main hydrocarbon accumulations are in the sandy levels of the Guadalupe Group and Mirador and Barco formations. The structural complexity of the foothills increases significantly from south to north, from relatively simple structures in Cusiana to tight asymmetric structures with higher dips in Cupiagua and Cupiagua South. Complexity continues to increase toward the north, where the shortening is greater as evidenced by surface geology (Figure 1).