• Erica dos Santos Godinho
4. term, Oil and Gas Technology, Master (Master Programme)
Scale formation has been considered a major problem in the oil and gas industry. The mineral precipitation can pose a serious threat to oil and gas production both at a surface (production facilities) and subsurface (reservoir and near- wellbore region) level.

The scale deposition can result in a decreased production and end up in well loss. The current research investigated the scale potential associated to the an offshore produced water sample (Halfdan field - North Sea) if exposed to two different formation waters (Ekofisk and Valhall) at 70ºC.

The coreflooding experiments at constant flow-rate have demonstrated the occurrence of porosity reduction (ca. 1.3\% in one of the cases) and permeability decrease, approximately 0.017 D in both cases. Moreover, the experimental results have indicated the possibility of barite precipitation, tendency for potassium, carbonate and bicarbonate ions retention and localized phosphate dissolution.
Publication date7 Jun 2018
Number of pages87
ID: 280534451