Large 2D seismic sections

3D seismic data

and drillinglog data

combined with high-accuracy gravity

magnetic and electric survey data

were used in a systematical analysis of the regional geological structure in Changling fault depression.It is suggested that the Changling fault depression is not a simple single fault depression but a complicated fault depression cluster

which is composed of many primary and secondary fault depressions and connected with the northern part of Gulong fault depression.Structural units and plays in the area are identified based on integrated industrial mapping.Geometric and kinematic analyses of the main faults are also carried out and based on that

the structural evolution of the fault depressions is studied and divided into the following three periods: basement formation

fault depression development

and modification.With analyses of petroleum geological conditions

the accumulation characteristics of different gas reservoirs are studies and potential exploration targets are defined.