Abstract: Theoretical model “Geothermics·Basin·Hydrocarbon" is a scientific result obtained by a group of researchers led by Mr. Feng Fukai at Petroleum Geology Institute of Ministry of Geology and Mineral Resources(MGMR). Its main points can be described as follows: Geodynamics is based on thermodynamic. Thermal activity in the deeper part of the earth is the major macroscopic control on tectonic movement of crust as well as formation, distribution and evolution of a sedimentary basin. Thermal characteristics of various basins control organic matters alternation and hydro-carbon phase behavior distribution within them. In the process of conversion of kerogen to hydrocarbon, thermal effect the most active among masses of geologic and physio-chemical factors, which is the prerequisite condition for formation of basin and also a link between basin and hydrocarbon.

Key words: Thermal structure, Geothermal field, Basin, Hydrocarbon evolution, Phase behavior