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Lateral upscaling of deltaic reservoir architectural elements in wave-dominated deltas.

Loxton, Natalie

Engineering Design Report 2008

University of Adelaide

Abstract

This study investigates the effect of upscaling images of wave-dominated deltas. 

Due to the tendency for distributaries to carry organic material, and the high rate of subsidence that occurs at the beach ridges, deltas have the capacity to trap organic matter.  Over time this trapped organic matter can develop into a hydrocarbon reservoir, thus ancient deltas are of interest to the petroleum industry.

The architectural features of greatest interest for hydrocarbon recovery purposes in wave-dominated deltas are the distributaries and the beach ridges.   The orientations of these two features are approximately perpendicular to one another, so finding the most favorable upscaling procedure to optimise both of the features was the subject of investigation.

Twelve images of wave-dominated deltas were re-sized and re-drawn in ‘Adobe Illustrator’.  The distributaries were separated from the beach ridges and the stand-alone features were studied as their own image. 

The new images were imported into a new program called ‘ImageUpscaler’ (Version 1.1), where they were upscaled using six upscaling techniques.

The best upscaling techniques available in ‘ImageUpscaler’ was determined, and the images were upscaled until gaps in the features appeared.  Once gaps in continuity appeared, parameters of the upscaling grid were changed and the image was studied to determine which changes to the grid block returned the continuity to the feature.

Australian School of Petroleum
THE UNIVERSITY OF ADELAIDE

SA 5005 AUSTRALIA

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