PHOTOELASTIC EXPERIMENTAL MODELLING OF EVOLUTION OF CENOZOIC TECTONIC STRESS FIELD AND ANALYSIS OF PETROLEUM GEOLOGICAL CONDITION IN HUANGHUA DEPRESSON

Based on the analysis of tectonic evolution,photoelastic experimental modelling is operated on the evolution of Cenozoic tectonic stress field in Huanghua depression.It is considered that there is a dextral rotation from NNE -to NE、NEE trend on the evolution of Cenozoic tectonic stress direction in Huanghua depression.It controls the activity of the faults and the formation of the depression,makes the fault activity transforming from extension in early stage (Kongdian and Shahejie Formation) to strike-slip in later stage(Dongying Formation and after it),facilitates multistage structure superimposed and formed various type traps.All those make an advantage for the hydrocarbon accumulation.