Calculation of Subzone Water Saturation by Logging Interpretation

In consideration of the problems in logging interpreting subzone water saturation for reserves calculation, Excel subroutine and functions are used to implement the methods of average calculation of pore volume of water saturation, saturation extreme and water saturation extreme and the extreme of pore volume of water saturation. The bases and advantages of each method are discussed. It is considered that the method for calculating pore volume extreme of water saturation is the most perfect one in the 4 methods. It is feasible for application.