Algunas Reflexiones sobre EOR IAPG EOR Workshop 3 - 5 de Noviembre de 2010 Carlos Glandt Director de Desarrollo

Una situacion movilizadora IHS data base – not QC'ed cummulative 4000 3000 2000 1000 10 20 30 40 50 60 70 80 90 100 Recovery Factor (%) Cummulative Oil in Place 10^ bbl 9

Contribuciones a la Produccion New discoveries Non-conventional oil Enhanced oil recovery Optimization and Development of existing resources Existing capacities New resources Environmental concerns

How big is the Challenge A wide range of RF's for primary and secondary recovery 100 % 50 % 0 % Aspiration to exceed 70% Recovery factor Better fields, e.g. high k sand, carbonates Complex fields, e.g. fractured carbonates, thin oil rims Difficult fields, e.g. low permeability, heavy oil Locked Fields, e.g. very sour, very low permeability, extreem heavy Field 1 Field 2 Field 3 Field 4 Field 5 Field 6 Cumulative STOIIP

Selection of EOR Project Concept Candidate IOR Processes Under Various Reservoir Conditions 2000 4000 6000 8000 10000 12000 1 10 100 1000 100000 Oil Viscosity (cp) Reservoir Depth (ft) Steam Injection Pattern Water Injection or Bottom Water Injection Immiscible Gas Injection Miscible CO2 or HC Gas Injection Miscible Nitrogen Polymer

EOR - What Works ASP Heat Gas (Large Slug) Surfactant Brute Force Probability of Significant Recovery Gas (Large Slug) ASP Surfactant Brute Force

Better Waterfloods results in Better EOR Better WF è Better EOR 0.2 Very successful floods 0.15 0.1 Tertiary recovery Less successful floods 0.05 0.2 0.4 0.6 0.8 Primary plus waterflood recovery

Chemical EOR Project in the U.S.

Chemical EOR Production in the U.S.

Field Scale Chemical EOR Projects? Are EOR alternatives dissapearing these days to allow for CEOR to deliver the promised barrels? Is CEOR robust enough to point to an unambiguous commercial phase? How well developed and managed the waterflood needs to be to provide a solid ground for CEOR? Are we minimizing the importance of having a trained and skillfull workforce (engineers and operators) to be successful?