Among the mineral resources at the bottom of the sea, the most concerned is the oil at the bottom of the sea  Some speculate that 37% of the continental shelf contains oil  The oil reserves at the bottom of the sea are about 250 billion tons, equivalent to more than 1/3 of the world's estimated oil reserves, and 140 billion tons of oil reserves on the continental shelf alone  The first oil well in shallow sea appeared in 1891, and more exploration and development began in the 1920s and entered a period of rapid development in the 1960s  At present, more than 100 countries in the world are exploring for oil at the bottom of the sea, and more than 30 countries have exploited this industrial blood  In the 1950s, the production of oil bottom the sea accounted for only 5% of the world's total oil production  In the 1970s, it increased to 29%  In the 1980s, it reached 40%
At the beginning of the 21st century, it has far exceeded 50%
Most of the oil and products used today come from oil fields at the bottom of the sea.