Primary discussion on isotope characteristics of coalbed gas of Qinshui basin

Qingshui basin is not only one of important coal production bases in China, but also an important potential block for coalbed gas production. Based on previous study results, the history of gas generation, the information concerning C,H isotope of coalbed gas are researched.This paper primarily discusses the characteristics of hydrocarbon-source rock and thermal maturity, analyzes the possibility of multi-source property. At last the paper provides the new recognition on gas genetic types of the basin.