B08 Water Flooding of Carbonate Reservoirs – Effects of a Model Base and Natural Crude Oil Bases on Chalk Wettability T. Puntervold* (University of Stavanger) S. Strand (University of Stavanger) & T. Austad (University of Stavanger) SUMMARY Polar components especially the carboxylic material in crude oil are known to have great impact on the wetting conditions of carbonates. The water-wetness decreases as the acid number AN of the crude oil increases. The success of enhanced oil recovery by water flooding in fractured carbonates is strongly depending on the wetting conditions of the formation. The impact on wettability of basic compounds


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