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Session 2

Session 2. Stage in Field Development. Hydrocarbon Classification and Oil Reserves. Hydrocarbon Classification. Liquid Hydrocarbons Crude Oil, N Natural Gas Liquids, NGL Condensate, CL Gasoline, CLg Liquefied Petroleum Gases, CLp (LPG).

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Session 2

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  1. Session 2 Stage in Field Development

  2. Hydrocarbon Classification and Oil Reserves • Hydrocarbon Classification • Liquid Hydrocarbons • Crude Oil, N • Natural Gas Liquids, NGL • Condensate, CL • Gasoline, CLg • Liquefied Petroleum Gases, CLp (LPG)

  3. Hydrocarbon Classification and Oil Reserves • Natural Gas Nonassociated Gas, G Associated Gas, Ga Dissolved Gas, Gd Injected Gas, Gi

  4. Hydrocarbon Classification and Oil Reserves Fig. 1 - Fluid Hydrocarbon Classification

  5. Hydrocarbon Classification and Oil Reserves • Oil Reserves Classification • Recovery possibilities • Degree of proof • Development and producing status • Energy source • Primary reserves • Secondary reserves • Tertiary reserves

  6. Hydrocarbon Classification and Oil Reserves Fig. 2 - Oil Reserves Classification and EOR Target and Path

  7. Producing Reserves • Oil Recovery Methods • Primary Recovery Methods • Improved Recovery Methods • Conventional methods (secondary methods) • Enhanced oil recovery methods (tertiary methods) • from research and lab experiment, which can improve the possiblereserves, • through field pilot tests, which can increase the probable reserves, • to proved and producing reserves when the commercial development of the reservoir under one of the EOR methods is in place.

  8. Fig. 3 - Primary and Improved Recovery Methods

  9. Primary Recovery Factor Water Drive RF mencapai 50% Well Head oil RESERVOIR water

  10. Solution Gas Drive RF mencapai 15%-25% Well Head Gas terlarut oil Gas terlarut Gas terlarut Gas terlarut RESERVOIR Gas terlarut Gas terlarut Gas terlarut Gas terlarut

  11. Gas Cap Drive RF mencapai ……. % Well Head Free Gas RESERVOIR oil

  12. Producing Reserves • Enhanced Oil Recovery Methods • improve sweep efficiency by reducing the mobility ratio between injected and in-place fluids, • eliminate or reduce the capillary and interfacial forces and thus improve displacement efficiency, and • act on both phenomenon simultaneously. • Chemical Methods • Miscible Methods • Thermal Methods

  13. Table 1 – Methods and Enhanced Recovery

  14. Producing Reserves • Oil Recovery Factor

  15. Producing Reserves Table 2 – Conventional and EOR Methods Efficiency (ER)

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