140 



TABLE 3.— CALCULATIONS OF NEW RESERVES REQUIREMENTS TO MEET DEPARTMENT OF INTERIOR 



PROJECTIONS, 1965-80 



[In billions of barrels] 



Crude oil 



NGL 



Total 

 liquids 



Reserves at Jan. 1, 1966 



Additions required, 15 years. . 



Production, 15 years 



Reserves at Jan. 1, 1981 



Reserve/Production ratio 1965. 

 Reserve/Production ratio 1980. 



10. Department of the Interior estimates for 1970-1980 ranges about one-fifth 



to one-third of the way between the medium and high RFF forecasts. 



11. Tal)le If shows the calculations of the new reserves requirements to meet the 



various RFF projections during 1981-2000, assuming: 



(a) imports=20 percent of total supply, and 



(b) reserve/production ratio=8 or 10:1 at end of century. 



TABLE 4.— CALCULATIONS OF NEW RESERVES REQUIREMENTS TO MEET RFF PROJECTIONS, 1981-2000 

 TOTAL LIQUID HYDROCARBONS 



[In billion barrels] 



