DISCUSSION ON THE PROBLEMS OF COAL-RELATED OIL FIELDS

If the oil fields whose major contributing components are coal rock exist in the coal-bearing system of the world? Coal rock can be classified as humic and sapropelic coal.Based on the investigation to the research history of coal-related oil in the world,it is pointed out that not only sapropelic coal can generate oil but also the oil can form coal-related oil fields.But the oil fields whose major contributing components are undisputedly humic coal have not been discovered so far.