Blog | Advanced Geosciences Inc

Webinar | Summary of the AGI EarthImager Inversion Modelling Software Features

Posted by hector on Feb 07, 2018

Short webinar covering basic usage of the AGI EarthImager Inversion Modelling software.

A table of contents embeded in the video lets you skip to topics of interest, just select the topic on the chapters section of the video (right-hand side).

 

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Pole-Pole Array: Electrical Resistivity Methods, Part 5

Posted by hasan on Oct 06, 2017

Electrode arrays are different arrangements of electrodes used to perform geophysical resistivity measurements. Electrode arrays were developed in order to make field measurements more efficient and data interpretation easier.

 

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Pole-Dipole Array: Electrical Resistivity Methods, Part 4

Posted by hasan on Oct 06, 2017

Electrode arrays are different arrangements of electrodes used to perform geophysical resistivity measurements. Electrode arrays were developed in order to make field measurements more efficient and data interpretation easier.

 

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Dipole-Dipole​ ​Array:​ ​Electrical​ ​Resistivity​ ​Methods,​ ​Part​ ​3

Posted by hasan on Oct 06, 2017

Electrode arrays are different arrangements of electrodes used to perform geophysical resistivity measurements. Electrode arrays were developed in order to make field measurements more efficient and data interpretation easier.

 

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Schlumberger Array: Electrical Resistivity Methods, Part 2

Posted by hasan on Oct 06, 2017

Electrode arrays are different arrangements of electrodes used to perform geophysical resistivity measurements. Electrode arrays were developed in order to make field measurements more efficient and data interpretation easier.

This is the second article in our series exploring 11 electrode arrays and methods. We’ve also covered the Wenner array...

Wenner Array: Electrical Resistivity Methods, Part 1

Posted by hasan on Oct 06, 2017

Electrode arrays are different arrangements of electrodes used to perform geophysical resistivity measurements. Electrode arrays were developed in order to make field measurements more efficient and data interpretation easier. In this series, we’ll explore 11 electrode arrays. The first array we’ll discuss is the Wenner array.

What is the Wenner array?

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A Comparison Of 11 Classical Electrode Arrays

Posted by hasan on Oct 06, 2017

 

Electrode arrays can be defined as various arrangements of electrodes used to perform geophysical resistivity measurements. These arrays were developed before computers and modern algorithms were available in order to make field measurements more efficient and data interpretation easier. Even with today’s automatic resistivity imaging instruments,...

The Streaming-Potential Method: Its 2 Main Uses

Posted by markus on Feb 28, 2017

Streaming-potential (SP) is an electrical surveying method used when fluids or electrolytes—typically water—move through porous areas in the the ground. This creates a change in voltage that can be read using a voltmeter and two electrodes. Streaming-potential is synonymous with “self-potential” and “spontaneous-potential,” though the latter two designations are used when the cause of the spontaneous voltage is chemical processes associated...

An Overview Of The Self-Potential (Spontaneous-Potential) Method

Posted by markus on Feb 15, 2017

Before we dive into details, let’s start with a primer on three different terms that are abbreviated “SP.” In this article, we’ll be discussing self-potential, which is synonymous with spontaneous-potential. The self-potential method in geophysics refers to an electrical surveying method used for looking at electrical anomalies in the ground. It is primarily used in mineral exploration. Streaming-potential, on the other hand, is caused by a fluid —typically water with dissolved minerals (an electrolyte)—moving in the ground, which causes a change in voltage. This change is detected when a...

A Closer Look At 3D Resistivity Surveys

Posted by markus on Feb 14, 2017

One-dimensional (1D) resistivity surveys are not ideal because they assume that the geological layers are horizontal and homogeneous—which is rarely the case. Two-dimensional (2D) resistivity surveys are an improvement but still an approximation, as they assume the geology continues infinitely in both directions perpendicular to the survey line. While this method is more accurate than the 1D Vertical Electrical...

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