Analysis of a fault-related folding an blind fault in Karanj oil? eld

Karanj anticline is an asymmetrical fold trending toward SW. The average thickness, parallel with the axial surface, of Asmari Formation in different parts of this anticline is 550 meters and its actual thickness is estimated to be 403 meters. Faulted detachment fold model is suggested as the mechanism of folding in Karanj oil eld. Geological section and the epicenter of instrumental data along with the interpretations of 3D seismic proles indicate the function of two thrust faults in northern and southern limb of this anticline and the function of a tear fault transverse with this anticline by which the curvature of the structural axis of it is inuenced. The 3-D model prepared from the top of the Asmari Formation by the use of underground maps (UGC maps) and wells data showed that the morphology of the Asmari Formation is highly inuenced by the function of these faults. Fractal analysis of the drainage patterns shows that different parts of this anticline has had different rate of tectonic activities during geological history, in a way that, the middle part in the northern limb shows more tectonic activities.