BVW as an indicator for hydrocarbon and reservoir homogeneity

Bulk Volume Water (BVW) which is defined as the product of water saturation and the porosity is one of the most important reservoir parameters in: (1) Defining the state of rock whether homogeneous or not, (2) Determining reservoir permeability, and (3) Indicating shaliness effect. The purpose of this paper is mainly two folds:(1) luate such parameter using Resistivity and Gamma ray data in shaly sand reservoirs and in absence of the porosity data, especially in old wells that suffer from lake of data; as a function of formation water resistivity (Rw), corrected true resistivity (Rt), gamma ray readings (GR) and shale resistivity (Rsh), and such parameter as a hydrocarbon indicator. Such method was checked and successfully applied in three examples; one from San Juan Basin, USA is used to test the proposed formula in determining such parameter and the other two from Gulf of Suez Basin of Egypt, the first to serve the second fold of the paper, the use of (BVW) as a hydrocarbon indicator; whereas the second well is used to test and apply the two folds of this paper to illustrate how far such treatment is more or less reliable and accurate.