关键词: 含油气盆地, 盆地演化, 古温度, 数值模拟, 数学模型, 数值解

Abstract: Numerical simulation of the evolutionary history of an oil-,gas-bearing sedimentary basin may repeat its geological,hydrodynamic and thermodynamic development history on a computer,and may more realistically provide basin data about the mature time and region of organic matters and dynamic evironment of petroleum origin and its accumulation, so that it may quatify hydrocarbon generation. In the present paper, mathematical models describing the development of a sedimentary basin are estiblished. The models are characterised by an initial-boundary value problems of a system of nonlinear partial differential equations on the abnormal pressure and the paleo-temperature of the formation. Simulations of a two-dimentional problem is proposed, a theoretical analysis on their stability and a numerical example are given also. The results show that the abnormal pressure and the paleo-temperature computed are reasonable and display their physical characteristics clearly as well.