沒有人知道或不知道地球和39表面上到底有多少石油，也不知道未來會有多少石油產量。在石油儲量的廣義概念中，有幾個關鍵的區(qū)別：最終可采資源量、探明儲量、概算儲量和可能儲量以及石油儲量

Nobody knows or can know how much oil exists under the earth's surface or how much it will be possible to produce in the future  

All numbers are, at best, informed estimates. Within the broad concept of oil 'reserves' there are several key distinctions: ultimately recoverable resource, proved, probable and possible reserves and oil in place