Abstract: An active tectonic movement changes the space shape of stratum and result in periodic stress concussion, which will influence hydrocarbon migration and accumulation as fluid deposit in stratum. Taking Kuqa depression as an example, the geologic analysis and earthquake phenomenon observation are made by means of modern earthquake theory, and the mechanism, frequency and scope of fluid migration promoted by a tectonic movement are discussed in this paper. The study shows that dynamic effect and static effect brought by tectonic movement play an important part in hydrocarbon migration and accumulation. Particularly, the earthquake pumping effects during active tectonic movement allow its single influence scope to outclass that by itself. Hence such high frequency and high intensity of periodic stress changes should promote the migration and accumulation of hydrocarbons in Kuqa depression.

Key words: tectonic movement, earthquake, fluid, hydrocarbon migration