Using well logging data, valuable petrophysical information can be obtain about the structure of the layers that make up the well wall. With the help of this information, electrical facies can be extract. Extraction of electrical facies and their clustering allow us to evaluate the reservoir rock in terms of hydrocarbon production. In other words, evaluate the quality of the reservoir. Various methods are used to cluster and separate electrical facies in the drilled formation. In the present study, well diagrams of one of the wells located in one of the fields of southwestern Iran (Kopal field) in the depth range of 4357 to 4470 meters with porosity data obtained from core analysis have been use to estimate electrical facies. The results showed that in Sarvak Formation, through which the studied well has passed, the lithology is mainly of limestone type. Shale layers are also uniformly and in some places intrusive in lithology. In addition, shale volume calculations in Sarvak Formation in the studied well in the depth range of 4357 to 4470 meters (the total depth range is Sarvak Formation in the studied well, whose core analysis information is available) Showed that the volume of shale in Sarvak Formation in the studied well in the considered depth range is 1% on average. On the other hand, the porosity results of the core analysis were appli to the results of the well logging analysis. After matching the laboratory porosity data and the well logging, the discovery of the relationship between the well data and the results of the porosity calculation from core analysis resulted in the porosity being estimate at this depth range with well logging, which showed an average porosity of 2%. Considering that Sarvak Formation is very dense, it seems that the porosity calculation is close to the reality of Sarvak Formation. In addition, water saturation was calculate using the Indonesia equation. For this purpose, the values of cementation coefficient and saturation power were calculated using Picket diagram. Analysis of the results showed that water saturation varies from 0 to 100% and the average water saturation in Sarvak Formation in the studied well is estimated at 20%, which according to studies, water saturation with low amounts is more frequent than medium and high amounts. The distribution of electrical facies was estimated using MRGC, DC, AHC and SOM methods. For this purpose, the maximum facies for Sarvak Formation in the studied well was considered 8 according to previous studies on fossilology and rock texture. Facade estimation using MRGC showed that 4 electrical facies can be distinguished in total. 4 facies were considered as a basis in other methods. Analysis of the results showed that the AHC method behaves generally in estimating the electrical facies in the studied well and is not sensitive to changes in the input data of the well logging. Also, analysis of the results of facies distribution using DC method showed that this method is very sensitive to changes in input data and has not acted intelligently in the selection of electrical facies. But the MRGC method is more intelligent and logical in estimating the electrical facies than the DC and AHC methods. On the other hand, the distribution of electrical facies using SOM method showed that this method is more logical than the other three methods in the distribution of electrical facies And significant changes in fluid porosity and saturation at a thickness known as facies and in thicknesses where fluid porosity and saturation had close values in one facies. In general, the analysis of the results showed that among the four selected methods for estimating the electrical facies in Sarvak Formation in the studied well, the SOM method worked better. This method is better than MRGC in formations such as Sarvak Formation that do not have lithological diversity, and MRGC method will be superior to SOM for formations that have lithological diversity. In formations where there is lithological diversity, the MRGC method is more reasonable than SOM and prevents the formation of many facies in a small thickness.