Fluid dynamical fields in Damintun Depression

Liaohe Basin show that: the paleogeothermal gradient in the study area is greater than present one; the mudstone compaction could be classified into three types such as normal compaction-normal pressure

uncompaction-low overpressure in single interval

and uncompaction-high overpressure in double intervals. The present profile pressure system consists of normal pressure

slight overpressure and intense over-pressure from top to bottom. The fault systems

unconformity surfaces

interconnecting pore systems and diapir structures constitute the complex network system of vertical and horizontal transportation within the depression. Pressure evolution can be divided into two stages of initial overpressure accumulation and overpressure expulsion

and faults had an important controlling role to the formation

evoltution and distribution of the pressures. The fluid potential energy in profiles present a "double-layer" structure

and the depocenter was the fluid supply area whereas the slope was the main fluid dischareg area.