The Role of Separated Porosities on Determination of Cementation Factor and The Effect of Net Confining Pressure on it in One of Iranian Heterogeneous Carbonate Reservoirs



Cementation factor is the most important parameter in the fluids saturation models and small error in the evaluation of it has large effect on estimation of water saturation and therefore in-situ hydrocarbon reserve. Based on type of heterogeneity in heterogeneous carbonates the m value could be differed from 1 in fractured carbonates to 5 in separated vugs and molds porosity carbonate rocks. The increases of separated porosity in the rock will cause increase of m. Most of the time an experimental model for determination of m can be presented by accurate measurement of porosity and electrical resistivity of cores from drilling wells of a hydrocarbon field. Consider to different secondary digenesis conditions in hydrocarbon fields, the use of an experimental model from a field for another field will increase the risk of in-situ hydrocarbon reserve determination.