Oil fields are exploited either by onshore or offshore drilling, the latter entail some additional requirements because it is different from the first.Hydrocarbon exploration at sea is one of the most important topics nowadays. It demands a floating support that meets different specifications in order to perfectly achieve the targeted objective.Through this modest work, we have conducted a general study of this type of exploration , we outlined the Algerian offshore field, we then studied the case of Bej1 project in the Algerian territorial waters which is classified as an Ultra deep-water (Total depth of 19700 feet including 6600 feet as water depth, we chose the most adequate Offshore Drilling unit for Bej1, and we emphasized the added value digitalization can bring in optimizing drilling programs throughout drilling parameters extracted from neighboring wells (WOB, Pump Strokes Rate, bit rpm…) delivering best Rate of penetration (ROP) for each and every single formation using the data available online of Volva field located in the north sea .
