The regime of tectonic stresses and fault type based on petrophysical charts

Given that reservoir rock of most of the hydrocarbon fields in the south of Iran are carbonate and such reservoirs have tectonic complexity and reservoir characteristics, so for protective production of reservoirs and development of hydrocarbon fields, understanding how to build tectonics and tectonic behavior in the area and the porous elastic relationships are of particular importance, so this paper investigates the tectonic stresses regime and fault type based on petrophysical charts. The studied gas field is located in the northwestern part of the Persian Gulf approximately 120 km of southwest of Bushehr Port, 130 km south of Kharg Island and adjacent to Iran's water border with Saudi Arabia. In order to interpret the petrophysical charts, information on conventional and advanced petrophysical charts including Full Set and DLIS format FMI chart as well as LAS format core data was loaded into the software. There are several software for petrophysical evaluation. In this study, we used the Geolog software and Multimin modeling method which is possible to calculate reservoir parameters such as porosity, permeability, lithology and water saturation in eight reservoir zones (K1, K2, U1, U2, U3, U4, U5, U6). Petrophysical interpretation was performed using a probabilistic multi-mineral method that the results of petrophysical interpretations were in good agreement with the core data after correction. The basis of the petrophysical interpretation was to match the lithology and porosity with the mud window results. The direction of maximum and minimum horizontal stresses has been the same for all zones. By combining the results of this study, tectonic stresses regime and fault type were obtained in each of the reservoir sub-formations in the study well.