After years of extraction, excessive water production become an important problem in oil exploration which causes many further costs in production operation. Polymer gels are commonly used as water shutoff treatment to reduce the excessive water in fractured reservoirs and high permeability zones, recently. The present study introduces the performance of polyacrylamide crosslinked with Al(NO 3 ) 3 .9H 2 O for water shutoff treatment in hydrocarbon reservoirs. For this purpose, the set of empirical and experiment study were applied based on bottle tests, syneresis tests, swelling, rheology, coreflooding tests on sandpacked and fractured carbonated cores. The central composite design (CCD), as the most popular form of response surface methodology (RSM), was used to study on effect of two factors of polymer and crosslinker concentration on the gelation time and syneresis times of the polymer gels at 90 o C. According to the results of experimental design, polymer gel of Al(NO 3 ) 3 .9H 2 O with copolymer (sulfonated polyacrylamide AN 125 VLM) concentration of 37071 ppm and crosslinker concentration of 2707 ppm with gelation time of 34 h and syneresis time of 118 days were selected as the optimum compositions among the other designed polymer gel samples to study the performance of polymer gel system in fractured core. The coreflooding results indicated that these polymer gel systems have suitable performance in water shutoff treatment in fractured reservoirs and residual resistance factor of water for two polymer gel systems are higher than residual resistance factor of oil. Thereafter, by preparation of a superabsorbent performed particle gel (PPG), the effects of polymer and crosslinker concentrations as well as temperature, salinity, and pH of the medium are investigated on the swelling ratio of the PPG used in water shutoff treatment. According to the results increasing of polymer and crosslinker concentrations and increasing of salinity led to decrease in the swelling ratio of PPGs. Besides, rheology tests confirmed the PPG strength by increasing of polymer and crosslinker concentrations. However, swelling ratio of PPG has negligible change at pH levels between 5 to 9. Increasing temperature up to 100°C was found to lead to only a slight increase in PPG swelling ratio. At temperatures above 100 °C, however, PPG 3D network structure collapsed and its swelling ratio declined drastically. The degradation of the 3D structure of the gel polymer network at temperatures above 100°C was confirmed by performing differential scanning calorimetry (DSC) tests. Coreflooding results revealed that PPG caused higher water cut reductions and reduced the water production by 30% to 65%. Key words : Sulfonated polyacrylamide, Aluminum nitrate nanohydrate, Central composite design, preformed particle gel, coreflooding test