Abstarct: Drilling engineers to optimize drilling decisions, such as designing the path and location of wells, to avoid hazards such as explosion and pipe blockage; They need a little information about the high pressure zones in the subsurface. Pore pressure or fluid pressure inside rock cavities is one of the important committees in the discussion of exploration and drilling of hydrocarbon resources. High pore pressure has been reported in drilling oil and gas wells in many parts of the world. Existence of high pore pressure causes many problems such as well eruption, unstable well, clogging of drilling pipe or loss of drilling mud rotation. That seems to be why Numerical estimation of pore pressure in high pressure formations before drilling is essential for safe and economical drilling. Also in the field of exploration, the concept of pore pressure can be used in the analysis and study of hydrocarbon migration routes and also in the study of rock cover quality. In this study, we first try to study the basic concepts used in pore pressure estimation and then to investigate the seismic methods of pore pressure estimation, which is mainly using the effect of pressure on the amount of seismic velocity. The reason is that the speeds obtained from processing seismic data are usually not accurate enough in pressure analysis due to the low resolution and the assumptions of laxyered terrestrial and hyperbolic output. Therefore, in the study field, the pore pressure has been investigated using acoustic resistance. For this purpose, using acoustic graphs and density obtained from well drilling and three-dimensional seismic data, we calculate the acoustic resistance and then obtain the estimated pore pressure. Finally, the results of validation indicate the suitability of the pore pressure model obtained from this method. In general, in this study, we tried to estimate the pore pressure using three-dimensional seismic data and other available data in the study field. Given that the pressure studies in the world's carbonate reservoirs are very few, however, the results obtained from this study are reasonably satisfactory.