Based on the theory of hydrocarbon micro-seepage, this paper summarized the major mechanism of hydrocarbon micro-seepage hypothesis on geochemical exploration areas. According to one of the most commonly accepted mechanism of micro-leakage that hydrocarbon gas do Brownian motion in the form of colloidal micro-bubbles upward, this study established a numerical model of hydrocarbon micro-seepage with the theory of Porous media fluid dynamics and energy conservation, and simulated the dynamic process of vertical micro-leakage of hydrocarbon components and the abnormal formation. Combined the typical geological medium of Huabaogou oilfield in