A numerical approach to accurately estimate water resistivity (Rw) and saturation (Sw) in shaly sand formations

In hydrocarbon reservoirs, the accuracy of saturation depends on precision water and resistivity (Sw Rw). A significant interpretation parameter is formation (interstitial or connate which is, uncontaminated by drilling mud that saturates porous rock) because it appropriate for calculations (water and/or hydrocarbon) from basic logs. The most reliable way to determine this value through determination chemical composition inside formation. ratio between volume total pores its has a great role in estimating volume. However, aims paper have two main folds, firstly, introduce complete review resistivity, saturation, shale Secondly, presents numerical method true using Schlumberger (1975) shaly sand formations require critical treatment compared clean reservoirs. To ensure ability both water, technique was tested synthetic real field data.