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Growth Function Defined Estimating Field Growth in the Lower 48 States Estimating Growth in Alaska National Results Lower 48 Oil Growth Lower 48 Gas Growth Lower 48 Regional Growth Estimates Region 2 Pacific Coast Region 3 Colorado Plateau and Basin and Range Region 4 Rocky Mountains and Northern Great Plains Region 5 West Texas and Eastern New Mexico Region 6 Gulf Coast Region 7 Midcontinent Region 8 Eastern Summary and Conclusions References ILLUSTRATIONS Figure 1. Cumulative known crude oil recovery of fields discovered 1901-1978 estimates estimated in 1978 and 1991  11 Figure 2. Cumulative known crude oil recovery of fields discovered 1901-1978 estimates estimated in 1978 and 1991  12 Figure 3. Petroleum Regions of the lower 48 States 13 Figure 4. Region 2 Pacific Coast Projected growth of known oil recovery  14 Figure 5. Region 2 Pacific Coast Projected growth of known gas recovery  15 Figure 6. Region 3 Colorado Plateau and Basin and Range Projected growth of known oil recovery 16 Figure 7. Region 3 Colorado Plateau and Basin and Range Projected growth of known gas recovery 17 Figure 8. Region 4 Rocky Mountains and Northern Great Plains Projected growth of known oil recovery 18 Figure 9. Region 4 Rocky Mountains and Northern Great Plains Projected growth of known gas recovery 19 Figure 10. Region 5 West Texas and Eastern New Mexico Projected growth of known oil recovery 20 Figure 11. Region 5 West Texas and Eastern New Mexico Projected growth of known gas recovery 21 Figure 12. Region 6 Gulf Coast Projected growth of known oil recovery  22 Figure 13. Region 6 Gulf Coast Projected growth of known gas recovery  2 3 Figure 14. Region 7 Midcontinent Projected growth of known oil recovery  24 Figure 15. Region 7 Midcontinent Projected growth of known gas recovery 2 5 Figure 16. Region 6 Eastern Projected growth of known oil recovery 2 6 Figure 17. Region 6 Eastern Projected growth of known oil recovery 27 Figure 18. Lower 48 States onshore and State offshore areas Projected growth of known oil recovery 28 Figure 19. Lower 48 States onshore and State offshore areas Projected growth of known gas recovery 29

Estimates of inferred reserves for the 1995 USGS National Oil and Gas Resource Assessment