If they will have a major return on their risks they will keep drilling. If the return on the risks is not great, they will quit drilling.
Bottom line is as follows;
1. The current contract will most likely deny Statoil profit based on current knowledge gained from drilling the recent dry holes.
2. The knowledge gained from drilling indicates the contract will not be profitable if they continue drilling even if they do discover commercial quantities of oil.
Dunno if Statoil has the best oil basin visualization technology... maybe a BP or an Exxon would better be able to site a prospective well. But Cuba can’t make them do it.