Down-hole tomography

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Courtesy of Courtesy of Advanced Geosciences, Inc.

This is a collection of various cases where the 2D resistivity imaging method pioneered by Advanced Geosciences Inc have been successfully applied. Click on a section below and you will be shown a full 2D resistivity imaging brochure detailing the case in question.

These cases have been submitted by satisfied customers whom we thank for permission to publish their data on the web. Each detailed broschure will have a citation for the source of the data.


Resistivity tomography for hydrocarbon survey.
Oklahoma State University used ERT (Electrical Resistivity Tomography) to define the geological controls on the distribution and location of LNAPL (light non-aqueous phase liquid) hydrocarbon. Drilling in the area revealed that there was indeed LNAPL at the locations indicated by the ERT survey.

Resistivity tomography

Electrical resistivity tomography (ERT) for monitoring brine movement between two bore holes.
The electrical resistivity between two bore holes was measured using the AGI Sting/Swift system and its specially designed down hole electrode cables. Measurements were performed before and after injection of a brine solution into one of the two bore holes. The conductive brine clearly shows up after the injection and 'high lights' the ground water flow paths between the two bore holes.

The geophysical instruments used in the resistivity imaging cases described here are the AGI SuperSting R8/IP earth resistivity meter and the AGI Sting R1 earth resistivity meter together with the AGI Swift multi electrode cables and smart switches.
These make up systems with extremely fast data acquisition in the field.
Today the single-channel Sting R1 has been replaced by the even faster and more accurate instrument:
SuperSting R8/IP
The interpretation of data like this can be done using the 2D inversion program AGI EarthImager 2D available from AGI.

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