Abstract

Alteration of wettability to more water-wet and thereby improvement of spontaneous imbibition of water during sea water injection, has been studied using reservoir core plugs from two fractured chalk fields. Core plugs were prepared by removing easily accessible sulphate. The wettability conditions were characterized using the sulphate wettability test. Spontaneous imbibition of water was studied using brines with different ratios between formation water and sea water. The wettability and spontaneous imbibition for reservoir core plugs and outcrop core plugs were compared.

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