Determining the kind of porosity and permeability trend by velocity deviation log (VDL) in well number 3 in Kangan formation (southern Pars field)

Today by using the common diagrams including neutron, density and sonic logs it can found the porosity kind. The velocity deviation log (VDL) is among these cases, that is made by combining the sonic and density-neutron diagrams and it can got some information about dominant kinds of porosity in carbonates. In present research the information obtained from different wells as three well of Kangan formation, was used. The results of changes in VDL in well number 3 revealed 6 zones and by further investigations on these six zones, the permeability of that well determined as middle to good. It is necessary to note that in some points the porosity and permeability increases is attributed to dolomite presence and increasing the seam and cracks and in some regions due to presence of clay, the permeability is reduced.