Reservoir Rocks and Core Analysis

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How can amorphous silica impact core analysis?

It results in suppression of resistivity logs.

What effect can high-potassium forms of K-Feldspars have on gamma-ray interpretation?

Confuse gamma-ray interpretation.

How does dolomitisation of limestone affect crystal volume?

Reduces the crystal volume resulting in higher porosity.

Why can grain density-based porosity calculations be significantly inaccurate for amorphous silica?

<p>Because amorphous silica has high water content and a high surface area.</p> Signup and view all the answers

Which mineral composition can confuse gamma-ray interpretation from down-hole logs?

<p>K-Feldspars</p> Signup and view all the answers

What is the impact of chalcedony on resistivity logs in core analysis?

<p>Causes suppression of resistivity logs.</p> Signup and view all the answers

What is the impact of opalescent silica on resistivity logs in core analysis?

<p>Causes suppression of resistivity logs</p> Signup and view all the answers

How does dolomitisation of limestone impact porosity?

<p>Decreases crystal volume, increasing porosity</p> Signup and view all the answers

Which mineral can significantly affect gamma-ray interpretation from down-hole logs due to its high potassium forms?

<p>K-Feldspars</p> Signup and view all the answers

Why may grain density-based porosity calculations be significantly erroneous for amorphous silica?

<p>High water content and surface area of amorphous silica lead to errors in grain density</p> Signup and view all the answers

Which mineral has little effect on core analysis but can lead to confusion in gamma-ray interpretation due to high potassium forms?

<p>K-Feldspars</p> Signup and view all the answers

What impact does amorphous silica have on grain density-based porosity calculations?

<p>Significant errors due to its high water content and surface area</p> Signup and view all the answers

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