WebJan 18, 2024 · AAPG Store. The most direct way of finding water resistivity ( Rw) is to obtain a sample of formation water and measure its resistivity. However, this is seldom possible in practice, as formation water samples, if available, are invariably contaminated by mud filtrate. Rw is therefore usually calculated, and there are three methods available ... WebThe Formation Resistivity Factor, F, is an intrinsic property of a porous insulating medium, related to the degree of efficiency or inefficiency for the electrolyte-filled paths to conduct …
formation factor Energy Glossary - Schlumberger
WebJun 3, 2015 · shape factor F = formation factor g = gravitational acceleration k = permeability m = Archie cementation exponent p = pressure r h = hydraulic radius S bw = bound water saturation S wi = irreducible water saturation t 1 = NMR longitudinal decay time t 2 = NMR transverse decay time V ffi = free fluid fraction V bw = volume of bound water ... http://archieparameters.com/archie mozilla firefox für fire tablet
Dictionary:Archie’s formulas - SEG Wiki
WebThe Archie Equation An empirically-derived relationship, which has been used since 1942 to estimate saturation in clean sandstones and carbonates. Formation Factor: The relationship between porosity and resistivity of the formation. Determining “m” from the gradient Applied to the flushed zone The basic formulae can be WebMar 16, 2024 · Factors that affect the exponent, m, and the coefficient, a, in the modified Archie expression (Equation 5-49) are summarized in Tables 5-9 and 5-10, respectively … WebMar 10, 2024 · Archie’s parameters are substantial to be investigated in the evaluation of water saturation. Many researchers adhered to the opinion that Archie’s equation can still be applied to water saturation calculation in shale if the accuracy of relative parameters could be improved. External conditions, such as temperature, confining pressure, water … mozilla firefox für windows vista