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Sonic Log Wyllie Time-Average Porosity Calculator

Easily calculate and compute sonic log wyllie time-average porosity calculator with accurate equations, live formulas, and expert guidance.

Acoustic compressional wave transit time from sonic log.

Zero-porosity rock matrix acoustic transit time (55.5 sandstone, 47.6 limestone, 43.5 dolomite).

Pore fluid acoustic transit time (189 μs/ft for fresh water, 185 for saline brine).

Shallow unconsolidated sand compaction correction (typically 1.0 to 1.3).

Calculated Result
19.9 %

Sonic Porosity (ϕ)

Sonic Porosity (ϕ)

19.9 %

Sonic Derived Porosity Percent

19.9

Acoustic P Wave Velocity Ft S

12195

Acoustic P Wave Velocity Ms

3717

Compaction Penalty Ratio

1

19.9 — %

Calculation Breakdown

  1. Applied FormulaDetermines formation total primary acoustic porosity from wireline borehole sonic log compressional transit times using Wyllie’s time-average model.\Delta t_{log} = \phi \Delta t_f + (1 - \phi)\Delta t_{ma}, \quad \phi = \frac{\Delta t - \Delta t_{ma}}{\Delta t_f - \Delta t_{ma}}

Wyllie Sonic Porosity Metric Output

Interactive visualization based on your current inputs

Calculated Value
0.05.09.91520Sonic Porosity (ϕ)

What Is the Sonic Log Wyllie Time-Average Porosity Calculator?

This tool computes sonic log wyllie time-average porosity calculator with high precision arithmetic.

How Does the Sonic Log Wyllie Time-Average Porosity Calculator Work?

Determines formation total primary acoustic porosity from wireline borehole sonic log compressional transit times using Wyllie’s time-average model.

Sonic Log Wyllie Time-Average Porosity Calculator Formula & Variables

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

Δtlog=ϕΔtf+(1−ϕ)Δtma,ϕ=Δt−ΔtmaΔtf−Δtma\Delta t_{log} = \phi \Delta t_f + (1 - \phi)\Delta t_{ma}, \quad \phi = \frac{\Delta t - \Delta t_{ma}}{\Delta t_f - \Delta t_{ma}}

Determines formation total primary acoustic porosity from wireline borehole sonic log compressional transit times using Wyllie’s time-average model.

How to Use the Sonic Log Wyllie Time-Average Porosity Calculator

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

Step-by-Step Example Calculation

Sonic Log Wyllie Time-Average Porosity Calculator Example

Input Values:

measuredTransitTimeDeltaTUsFt:82.0
matrixLithologyTransitTimeDeltaTmatUsFt:55.5
fluidTransitTimeDeltaTfUsFt:189.0
compactionCorrectionFactorCp:1.0
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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