Structural studies of fractures and Mechanical stratigraphy of Cretaceous sediments, In the Isfahan region

Relative changes in sea level and sedimentary facies are affected on lithology, thickness, porosity, diagenesis and ending surface of the sediments layers significantly, that all of them are controller factors in the fracture patterns. In this research, the relation between the fractures density and spacing with parameters such as the lithology and thickness of the Cretaceous sedimentary units in two regions of Dizlu and Kolah Ghazi of Isfahan, have been studied. Identification fracture systems using satellite images, combination of the stratigraphic studies with mechanical and geometrical analysis of the joints through the linear method (using the field data perception and provided images of the study area) and statistical analysis of the fractures are the most important issues that to them has been done and discussed in this study. The results show, respectively, Dizlu and Kolah Ghazi area have five and six fracture sets and the change in spacing or density of the fractures can be affected by, thickness of sedimentary layers and type of lithology. The mechanical stratigraphy study and evaluation of the fracture properties in different sedimentary rocks, can be achieved to predictive the fracture patterns within different sedimentary units. Consequently, the knowledge and information about the storage and flow of the fluids within the sedimentary rocks in different regions improved.