Obiettivo To find out whether oil recovery from the fractured, heavy oil reservoir of Gela,Italy, can be enhanced by replacing the natural water drive mechanism with the injection of either natural gas or carbon dioxide. Laboratory tests have been performed on cores to assess how gas drainage improves oil recovery in comparison with water imbition, and how injected gas affects the thermodynamic characteristics of reservoir oil. A three-dimensional, black oil numerical model has been employed to evaluate the improvement in oil recovery and oil production rate that can be achieved under different gas injection schemes. The model had been previously validated by matching field past history; the future field performance by natural water drive has also been evaluated, to provide a basis for comparison. RESULTS: From the results of the numerical model study it appears that oil recovery from gela field can be significantly improved by substituting the natural bottom water drive with crestal injection of either natural gas or carbon dioxide. As the results of a field pilot in a large field such as Gela are difficult to interprete and evaluate, the testing of high pressure gas injection has been switched to the nearby Ponte Dirillo oil field, whose characteristics are very similar to those of Gela (project no 05.14/79). Programma(i) ENG-HYDROCARB 1C - Programme (EEC) of Community projects in the hydrocarbons sector, 1973-1985 Argomento(i) Data not available Invito a presentare proposte Data not available Meccanismo di finanziamento Data not available Coordinatore Agip SpA Contributo UE Nessun dato Indirizzo Piazza Vanoni 1 20097 Milano Italia Mostra sulla mappa Costo totale Nessun dato
