2020 年 85 巻 2 号 p. 95-100
The United States of America has become the world biggest oil producer again in 2018. The reason is the shale gas and shale oil revolution. USA, Saudi Arabia and Russia are producing oil over 10 million barrels per day. Now, the world oil producing countries are watching not oil peak in supply side but oil peak in demand side. The 21st century is both environment protection century and natural gas century. The world oil demand will become over 100 million barrels per day in 2040. The oil and natural gas development industry is required to explore oil and natural gas, considering the protection of environment.