摘要
Searching for petroleum! First it was onshore, dating back to the ancient civilizations of Egypt, Mesopotamia (Iraq), Iran, and China, but becoming a modern industry after Edwin Drake's successful drill in Pennsylvania in 1859. Then it was offshore, with the first well drilled at Summerland, California, in 1897, but the drilling remained in water depths of 35 feet for decades. Finally, albeit gradually,
