Floating proppant stimulates sand with a high permeability contrast

Fracturing treatments performed in three wells in Minas oil field, on Sumatra Island, successfully placed a floating graded walnut-hull proppant in the top section of a layered sandstone reservoir.PT Caltex Pacific Indonesia has operated the extensively waterflooded field since 1952.Most sands in the field have a fining upward sequence. The upper part has lower permeability in which newer well logging techniques indicate higher remaining oil saturation, while water has generally swept the lower part that has very high permeability.The idea of a floating proppant involves creating an hydraulic fracture with a fracturing fluid that contains proppant with a lower specific gravity than the fl...

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