Abstract: Dynamics and thermodyrnamics analyses show that the incremental pore fluid pressure caused by tectonic compressive stress is real-ized by bulk strain of reservoir indirectly,both of which assune relations of direct ralio. The statistic analysis showed more intensive posilive correlation between the tightness or conpressive ratio and overpressures in Mesozoic lraps in 1ortherm Kuqa depression. The analysis of dynan-ics and lectonic geology proved that the tightness and compressive ratio of lraps could be used for description of the bulk strain. lt is suggesled that the Lectonic conipression is one of the main factors resulted in the incremental pore fluid pressure of Mesozoic reservoirs in ltorthern Kuqa depression.

Key words: Kuqa depression, abuormal pressure, structure, fluid, stress