E R O E I Energy Big Picture P P T 15aug09

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Dropping Energy Return On Energy Invested (EROEI) for petroleum and the coming transition to alternative energy sources

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E R O E I Energy Big Picture P P T 15aug09

  1. 1. EROEI Energy Big Picture August 15, 2009
  2. 2. Energy Source History
  3. 3. Energy Source Transitions <ul><li>Previous transitions were from lower grade to higher grade energy resources </li></ul><ul><li>The coming transition is from a high energy resource of oil to alternative lower grade energy resources </li></ul><ul><li>Applying “Best First Principle” – using the best resources first </li></ul><ul><li>Energy Return on Energy Invested (EROEI) analysis is essential </li></ul>
  4. 4. EROEI for U.S. Oil and Gas
  5. 5. Gross and Net Hubbert Curves
  6. 6. Hubbert Curve Comments <ul><li>Gross Hubbert Curve: 50% of the energy resource is remaining when production levels reach the peak </li></ul><ul><li>Net Hubbert Curve: Due to declining EROEI, by the time peak production is reached, 73% of the net energy available is already used </li></ul><ul><li>Due to technology advances, Hubbert Curve becomes a “shark fin” </li></ul><ul><li>Due to EROEI, an even sharper “cliff-like” descent post peak </li></ul>
  7. 7. Hubert Curve for the U.S.A. Red: Gross Blue: Net
  8. 8. U.S. Remaining Oil and Treasury Debt
  9. 9. Energy Source Comparison
  10. 10. Energy Source Comparison <ul><li>In one year the entire world produces about 1 cubic mile of oil </li></ul><ul><li>This is equivalent to about 50 years of energy production by each present alternative energy source </li></ul><ul><li>Post-wellhead oil energy costs bring the present EROEI from 10:1 at the wellhead to as low as 3:1 at the consumer </li></ul><ul><li>What is the minimum EROEI that a sustainable society must have? </li></ul>

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