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  • Mature Colombian field improved with dual stimulation


    R. Rozo, J. Paez, A. Milne and D. Soler

    Colombia’s Orito field has operated for more than 35 years. By this decade, it had seen production decline to less than 3,500 bopd from a one-time peak of 66,000 bopd. Recently, Petrominerales achieved a significant increase in production and recoverable reserves by using a dual stimulation service that combines acid and propped fracturing technologies. The treatment was successfully used in a reservoir that has frequently failed to respond to hydraulic fracturing, and where a 2002 third-party reservoir study concluded that the wells "indicate higher skin factors following the fracture treatment and lower production ratios, regardless of the fluid used." The service is designed to remove fracture face skin and optimize fracture conductivity. ORITO FIELD AND CABALLOS FORMATION Orito field, almost 17 mi2 (43 km2) in area, is in Colombia’s Putumayo basin. As the basin’s largest field, it originally contained more than 1 billion bbl of oil-in-place, in three primary reservoirs.

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