--> Abstract: Seismic Geomorphology Study of Fluvial Deposits in C1 Unit of Carbonera Formation and the Application to Geological Model in Rubiales Field; Eastern Llanos Basin, Colombia, by Kazmierczak, Thais D.; Yoris, Franklin; Morales, Diego; and Gomez, Yohaney; #90166 (2013)

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Seismic Geomorphology Study of Fluvial Deposits in C1 Unit of Carbonera Formation and the Application to Geological Model in Rubiales Field; Eastern Llanos Basin, Colombia

Kazmierczak, Thais D.1; Yoris, Franklin; Morales, Diego; and Gomez, Yohaney
1[email protected]

The Rubiales Field is located on the Southeast of Oriental Llanos Basin (OLLB). This Field produces heavy oil from fluvial sands of Carbonera Formation. The understanding of the geometry of fluvial bodies during Oligocene time in this region (OLLB), is critical for the best oil recovery.

The stratigraphic architecture of Carbonera Formation is quite complex. The interpretation of different horizon slices show variety of changes of the channel shapes, directions and sinuosity during the basin infill. Correlations using seismic/stratigraphic methods show the sedimentary style of meandering channels inside channel- belts with conspicuous features of amalgamated point-bar architectures. The correlations using well transects allow the understanding of the different fluvial plains stacking patterns and their complex internal facies architecture.

This work demonstrates the different paleo-drainage trends, varying from NW to N at the C1 Unit. 2nd order channels show South to North trends, as a consequence of positive and exposed source area located south of the Rubiales-Quifa oil field during Oligocene times.

As a result of this study, the stratigraphic geometries identified in the C1 unit of the Carbonera Formation, can be used as a trained-image example to be used for other fluvial units that represent the pay units of this formation; i.e. the " Arenas Basales" oil-productive interval of the souther reaches of the Eastern Llanos Basin.

 

AAPG Search and Discovery Article #90166©2013 AAPG International Conference & Exhibition, Cartagena, Colombia, 8-11 September 2013