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干酪根热解成烃作用是烃源岩中异常高压的重要成因之一。由于成烃增压作用主要是伴随生、排烃作用而发生的，因此很难直接进行恢复和计算，通常借助数值模拟方法来描述。通过成烃作用的物理化学机制建立了成烃增压机制的数学模型。该数学模型表明，生烃越多、干酪根与烃类流体的密度差越大、烃源岩越致密，则成烃增压强度就越大；天然气的生成比石油的生成具有更显著的增压效应。应用该数学模型可模拟研究烃源岩演化过程中的成烃增压，并能再现由此导致的微裂缝幕式排烃的地质过程。成烃增压数值模拟在我国几个典型含油气盆地中得到了有效的应用。
The pyrolysis and hydrocarbon generation of kerogen is one of the important causes of abnormal high pressure in source rocks. Since hydrocarbon generation and pressurization are mainly accompanied by the generation and expulsion of hydrocarbons, it is very difficult to recover and calculate directly, which is usually described by means of numerical simulation. The mathematical model of hydrocarbon generation and pressurization mechanism was established through the physicochemical mechanism of hydrocarbon generation. The mathematical model shows that the more hydrocarbon generation, the greater the density difference between kerogen and hydrocarbon fluid, and the denser the source rocks, the greater the intensity of hydrocarbon generation and pressurization. The generation of natural gas has more significant pressurization than the generation of petroleum effect. The mathematic model can be used to simulate the hydrocarbon generation and pressurization during the evolution of source rocks and to reproduce the geological process of micro-fracture episodic hydrocarbon expulsion. Numerical simulation of hydrocarbon generation and pressurization has been effectively applied in several typical petroliferous basins in China.