--Click 'View Figures' to the data visualization webpage.
* There are two crude oil databases, these crude oil samples were taken from refineries and oil fields around the world.
* In addition to conventional crude oil, heavy oil and condensate samples are also included.
* The samples in CRUDE OIL_DB_1 are mainly from China's Bohai, with small amounts from other regions such as the Middle East.
* Information about the refinery to which each sample belongs will not be submitted to the database.