Method for fine and rapid quantitative simulation of hydrocarbon generation and expulsion history of source rocks in sedimentary basin

The invention relates to a method for fine and rapid quantitative simulation of hydrocarbon generation and expulsion history of source rocks in a sedimentary basin, relates to the technical field of oil and gas resource evaluation, and is used for solving the technical problems of big errors, heavy computation and difficult promotion existing in the traditional computing method. The method provided by the invention establishes a fast approximation algorithm that is closer to the actual hydrocarbon generation process of the source rock by defining the longitudinal position and continuous distribution degree of the source rock and the quantitative characterization parameters of the source rock, that is, the equivalent distribution index and dispersion coefficient, achieves the purpose of accurate, fast and quantitative calculation of hydrocarbon generation from source rocks, and can provide more scientific and accurate results for oil and gas resource evaluation and basin simulation. 本发明涉及一种沉积盆地烃源岩生排烃史精细快速定量模拟方