Archie equation petrophysics
Archie is perhaps best known for his contributions to petrophysics the prototype equation relating rock porosity to various electrical properties of rock bears his name: archie’s equation. Archie equation petrophysics introduction archie unleashed is an attempt to put the basic log analysis methodology for computing water saturation into a readable reference document. Petrophysics petrophysics geology drilling reservoir engineering geophysics 2 electrical archie equation determination of hydrocarbon-bearing vs. What is the archie equation archie developed his famous equation to calculate, from well log parameters, the water saturation (s w) of. Petrophysics (from the greek πέτρα, petra, rock and φύσις, physis, nature) is the study of physical and chemical rock properties and their interactions with fluids. Rocks with a range of m values, workers after archie introduced another constant, “a” in a second equation, archie described resistivity changes caused by hydrocarbon saturation archie defined a “resistivity index”, i, as the ratio of the measured resistivity of the rock, rt, to its expected resistivity if completely saturated with water, ro.
Archie equation petrophysics 6518 words | 27 pages introduction archie unleashed is an attempt to put the basic log analysis methodology for computing water saturation into a readable reference document. Little about basic petrophysics (applied geology) specialization in petrophysics university of azad jammu & kashmir look method we use archie’s equation. Chuck merritt, now president and ceo of wellog calculates water saturation using the fertl equation for shale sw archie (carbonate) wl-07. Claude shannon versus gus archie: information theory as a guide to log evaluation without from this discipline of petrophysics, archie’s equation is. Introduction to petrophysics of reservoir rocks 1 g e archie 2 houston, texas abstract there is need for a term to express the physics of archie this equation. Archie, hingle, and pickett: determining fluid saturation for fun and profit archie’s equation.
Petrophysics and rock physics modeling of diagenetically altered sandstone model and stiff-sand model with archie’s equation go-mez. Archie water saturation this method is the old standard of the industry, but is now restricted to clean sands and carbonates it requires a good value for water resistivity. In petrophysics, archie's law relates the in-situ electrical conductivity of a sedimentary rock to its porosity and brine saturation: the equation reads.
Which remains the most widely applied equation in petrophysics archie equation in the limit of no but some models are useful: solving the simandoux equation. A first check on the r w of the aquifer is to back-calculate the apparent r w with the archie equation using water saturation determination petrophysics peh. Archie equation • archie equation is the most famous equation used by petrophysicists to determine the water saturation in the reservoir in hand • considered to be effective in clean reservoirs • used by petrophysicists and log analysts in manual interpretation to have a quick look evaluation.
Archie equation petrophysics
Slope = -m, the cementation factor 4 commonly used equation for electrical formation resistivity factor a archie's equation f = φ-m b. Resistivity concepts -- archie's laws quick links since the archie equation was not found to be valid for all formations.
The “m” exponent in carbonate petrophysics by the archie equation (thick black line-mres ) are compared with those from spi/nugent, nurmi. Chapter 5 determination of r w lecture notes for pet 370 spring 2012 prepared by: thomas w engler archie’s equation a if water zone is present b. Water saturation from electric logs one-day seminar “petrophysics 101 • archie clean sand equation: s w n = fr w /r t. Montaron, 2009, petrophysics, vol 50 18 archie: sources of water resistivity (rw) archie is not a universal equation for all rock types 2 0.
The pickett plot is a visual representation of the archie equation and pickett plot construction: original content in datapages find the book in the aapg store. A comprehensive water saturation model for hoyer petrophysics, inc • all regress to the basic archie equation at 0. A particular relation proposed by ge archie between the formation factor (f) and porosity (phi), in which f = 1 / phi m, where the porosity exponent, m, is a constant for a particular formation or type of rock. • archie, g e and mccurdy, r c, 1939, schlumberger electric logging in the gulf coast: june 6 • archie, g e, 1939, the problem of using schlumberger logging for a quantitative study of sands in the gulf coast: june 26 • archie, g e, 1940, progress report on electric logging in the gulf coast area, june 1939 to march 1940: may 1.