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Archie Water Saturation Equation from Formation Resistivity Calculator

Easily calculate and compute archie water saturation equation from formation resistivity calculator with accurate equations, live formulas, and expert guidance.

Uninvaded reservoir deep lateral log resistivity.

Connate brine resistivity at reservoir temperature.

Interconnected pore volume fraction (e.g. 0.22 for 22%).

Pore geometry lithology factor (1.0 for clean sands/carbonates, 0.62 for Humble sands).

Pore connectivity exponent (typically 1.8 to 2.2).

Wettability exponent (typically 2.0 in water-wet rocks).

Calculated Result
16.3 %

Water Saturation (Sw)

Water Saturation (Sw)

16.3 %

Water Saturation Sw Percent

16.3

Hydrocarbon Saturation So Percent

83.7

Formation Factor F

20.66

Wet Resistivity R0 Ohm M

0.93

16.3 — %

Calculation Breakdown

  1. Applied FormulaCalculates interstitial connate brine water saturation Sw and net hydrocarbon saturation So from electric wireline well log deep resistivity and formation porosity using Archie’s equation.S_w^n = \frac{a R_w}{\phi^m R_t} = \frac{R_0}{R_t}, \quad S_o = 1 - S_w

Archie Water Saturation Metric Output

Interactive visualization based on your current inputs

Calculated Value
0.04.18.21216Water Saturation (Sw)

What Is the Archie Water Saturation Equation from Formation Resistivity Calculator?

This tool computes archie water saturation equation from formation resistivity calculator with high precision arithmetic.

How Does the Archie Water Saturation Equation from Formation Resistivity Calculator Work?

Calculates interstitial connate brine water saturation Sw and net hydrocarbon saturation So from electric wireline well log deep resistivity and formation porosity using Archie’s equation.

Archie Water Saturation Equation from Formation Resistivity Calculator Formula & Variables

The core mathematical equation utilized by this calculator is expressed as:

Swn=aRwϕmRt=R0Rt,So=1−SwS_w^n = \frac{a R_w}{\phi^m R_t} = \frac{R_0}{R_t}, \quad S_o = 1 - S_w

Calculates interstitial connate brine water saturation Sw and net hydrocarbon saturation So from electric wireline well log deep resistivity and formation porosity using Archie’s equation.

How to Use the Archie Water Saturation Equation from Formation Resistivity Calculator

  1. Enter your parameters into the designated input fields to calculate the result immediately.

Step-by-Step Example Calculation

Archie Water Saturation Equation from Formation Resistivity Calculator Example

Input Values:

formationTrueResistivityRtOhmM:35.0
formationWaterResistivityRwOhmM:0.045
effectivePorosityPhi:0.22
tortuosityConstantA:1.0
cementationExponentM:2.0
saturationExponentN:2.0
Worked Steps: Sample evaluation based on standard reference conditions.

Understanding Your Result

The calculated primary figure indicates the optimal or required %.

Factors That Affect the Result

  • Measurement tolerances, operational variance, and real-world conditions.

When Should You Use This Calculator?

  • Everyday budgeting, technical homework, professional estimation, and household projects.

Assumptions & Limitations

  • Assumes standard atmospheric or environmental parameters unless specified.

Frequently Asked Questions

Calculation Accuracy & Reference Note

Double-precision IEEE 754 arithmetic with validated empirical constants.

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