Total Observed Volume (T.O.V.): –
The total measured volume of all petroleum liquids, Sea Water, and free water at observed temperature and pressure.
Gross Observed Volume (G.O.V.): –
The total volume of all petroleum liquids and S&W, excluding free water, at observed temperature and pressure.
Net Observed Volume (N.O.V.):-
The total volume of all petroleum liquids excluding S&W, and free water at observed temperature and pressure.