Date of Award

Spring 1-1-2019

Document Type

Thesis

Degree Name

Master of Science (MS)

First Advisor

Paul Weimer

Second Advisor

Tomas Villamil

Third Advisor

Charles Stern

Abstract

The Bahía Basin is an intraslope basin in the Colombian continental slope located in the northern part of the South American Plate, in a structurally and stratigraphically high-complexity zone due to the interaction between the Caribbean and South American Plates. During the Neogene, the basin evolved associated with a transform margin.

Three main tectono-sequences (TS1 to TS3) characterize the Cenozoic stratigraphic evolution. TS1 consisted of deformed strata that underlie the prospective sequences. The transtension stage occurred during the deposition of TS2, which consist of six main sequences (S1 to S6). Each sequence has varying thickness, in part due to the syn-depositional structuring the basin. The basin developed onto a pre-structured topography, defined by the thrusting stage during TS1. Three sub-basin comprise the Bahia Basin, and basin-fill consisted of intraslope turbidite system, including channel-fill, lobes and levee sediments. The Araza-1 well, flanking the basin penetrated reservoir quality sand with gas shows.

TS3 developed after a major transpressional stage. This transpression inverted the basin, and created several potential anticline traps, underlying by reverse faults, and in echelon structures. The presence of gas shows suggest an active petroleum system. The Bahia basin is an attractive frontier exploration area.

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