What is "oilfields"

Usage examples of "oilfields".

Of the companies that were so willing to give me every facility I would like to thank, in particular, Trans-Canada Airlines and Canadian Pacific for making it possible for me to travel at will regardless of currency difficulties, and Imperial Oil for giving me the freedom of the new big oilfields of Alberta and going to endless trouble in taking me round their rigs and introducing me to the whole process of drilling.

He will be remembered affectionately by the hunters, miners and loggers, as well as the tourists, who visited him in his mountain kingdom and listened to his stories of the oilfields and heard him make the surrounding peaks ring with the skirl of his pipes.