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Gamma-Ray Log Shale Volume Fraction (V_sh - Larionov Model) Calculator

Easily calculate and compute gamma-ray log shale volume fraction (v_sh - larionov model) calculator with accurate equations, live formulas, and expert guidance.

Log reading in interval of interest.

Minimum gamma ray in shale-free rock.

Maximum gamma ray in pure shale bed.

Larionov non-linear calibration curve selection.

Calculated Result
16.6 %

Shale Vol. (V_sh)

Shale Vol. (V_sh)

16.6 %

Shale Volume Fraction Percent

16.6

Linear Gamma Ray Index Igr

0.429

Selected Larionov Model

Larionov (1969) Tertiary Young Rocks

Shaly Sand Interpretation

Shaly Sand: Clay conductivity corrections required for accurate saturation

16.6 — %

Calculation Breakdown

  1. Applied FormulaConverts wireline borehole gamma-ray log readings (API) into shale volume fraction (V_sh %) using Larionov non-linear clay calibration models.I_{\text{GR}} = \frac{\text{GR} - \text{GR}_{\text{min}}}{\text{GR}_{\text{max}} - \text{GR}_{\text{min}}}, \quad V_{\text{sh}} = 0.083 \left(2^{3.7 I_{\text{GR}}} - 1\right)

Gamma-Ray Shale Volume Metric Output

Interactive visualization based on your current inputs

Calculated Value
0.04.28.31217Shale Vol. (V_sh)

What Is the Gamma-Ray Log Shale Volume Fraction (V_sh - Larionov Model) Calculator?

This tool computes gamma-ray log shale volume fraction (v_sh - larionov model) calculator with high precision arithmetic.

How Does the Gamma-Ray Log Shale Volume Fraction (V_sh - Larionov Model) Calculator Work?

Converts wireline borehole gamma-ray log readings (API) into shale volume fraction (V_sh %) using Larionov non-linear clay calibration models.

Gamma-Ray Log Shale Volume Fraction (V_sh - Larionov Model) Calculator Formula & Variables

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

IGR=GR−GRminGRmax−GRmin,Vsh=0.083(23.7IGR−1)I_{\text{GR}} = \frac{\text{GR} - \text{GR}_{\text{min}}}{\text{GR}_{\text{max}} - \text{GR}_{\text{min}}}, \quad V_{\text{sh}} = 0.083 \left(2^{3.7 I_{\text{GR}}} - 1\right)

Converts wireline borehole gamma-ray log readings (API) into shale volume fraction (V_sh %) using Larionov non-linear clay calibration models.

How to Use the Gamma-Ray Log Shale Volume Fraction (V_sh - Larionov Model) Calculator

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

Step-by-Step Example Calculation

Gamma-Ray Log Shale Volume Fraction (V_sh - Larionov Model) Calculator Example

Input Values:

measuredGammaRayApi:65
cleanSandGammaRayMinApi:20
pureShaleGammaRayMaxApi:125
formationAgeCode:1
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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