logo Advanced Geosciences, Inc. Austin, Texas, USA. phone: +1(512)335-3338, fax: +1(512)258-9958
Manufacturer of geophysical instruments, resistivity and IP imaging systems and resistivity meters
AGI homepage
AGI headquarters!
AGI product catalog
Brochure Download
2D Brochures (all)
Cave and void detection
Dam investigations
Down-hole tomography
General mapping
Environmental surveys
Induced Polarization
Water exploration Miscellaneous
Resistivity literature
Y2K Statement
Customer cases
Amistad dam
Marine survey
Korean tunnel survey
SuperSting R8/IP
Sting R1/IP
Sting R1
Resix IP2DI - 2DI
File areas
Public files
Software demos
Sting/Swift User Group
SuperSting User Group
User Group registration
Company profile
Information request
Send us mail

Credit cards:

Master Card


American Express

Diners Club


AGI collection of 2D resistivity imaging brochures

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

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.


Resistivity Imaging survey with simultaneous IP imaging.
This survey shows the new AGI Sting R1 IP system in action imaging not only standard resistivity but also at the same time mapping induced polarization.


Resistivity Imaging cross-hole survey.
An example of a bore hole to bore hole dipole-dipole survey performed using our down hole cables and the Sting/Swift resistivity imaging system.


Locating water bearing fracture zones in bedrock.
This example shows a successful water exploration survey. A fracture zone in bedrock was located with Sting/Swift resistivity imaging. A well was drilled and it produced more than 100 gallons/minute from the fracture zone at 145-150 feet.


Resistivity Imaging survey for dam leakage detection at the Amistad Dam.
This case shows the successful detection of a dam leak and the subsequent repair of the dam.
The resolution obtained using the dipole-dipole, schlumberger and wenner arrays are compared.


Using resistivity imaging to map stratigraphy.
Mapping of sand and gravel lenses in a clay environment using resistivity imaging.


Using resistivity imaging to delineate contaminated fractures.
Mapping of hydrocarbon contamination beneath an old gas station using resistivity imaging.


Using resistivity imaging for tunnel detection.
The purpose of the survey was to find a tunnel used as production site for V1 rockets during WW2.


Using resistivity imaging for horizontal drilling site investigation.
This survey was done to find a suitable depth for installing cables and pipe lines.
AGI resistivity imaging turned out to produce the correct answers.


Pollution plume mapping using high resolution resistivity imaging.
Three parallel resistivity imaging profiles show the extent of the pollution plume.

Big size brochure

Tunnel site investigation using resistivity imaging
This highway tunnel construction was hindered by a large weak zone of clay and soft limestone easily visible in the resistivity imaging profile.


Mapping magnesium deposits using resistivity imaging.
This is an example of a survey in a low resistivity (=high conductive) environment. The total range of the resistivity is only 3-26 ohmm. The relatively "high" resistivity (15-25 ohmm) magnesium ore is covered by a low resistivity overburden (<10ohmm). In spite of the low resistivity, it is possible to delineate the magnesium ore using resistivity imaging.


Marine bottom resistivity survey.
The bottom layering in a Florida strait was investigated using resistivity imaging prior to construction of a utility tunnel.


Mapping the limits of a municipal landfill using resistivity imaging.
The objective here was to map the horizontal and vertical extent of a municipal landfill. Resistivity imaging supplied the answer.


Sting/Swift repeatability test
This test was done in order to verify the repeatability of the rseistivity imaging method as a tool to find subsurface structures.


Resistivity imaging and Spontaneous Potential (SP) survey for dam investigation.
Resistivity imaging and Spontaneous Potential (SP) survey for dam investigation.


Resistivity imaging survey for investigation of dam leakage.
Resistivity imaging survey for investigation of dam leakage.


Cave detection using the resistivity imaging technique.
Cave detection using resistivity imaging.

Karst fracture mapping

Resistivity imaging for mapping karst fractures.
Electrical resistivity imaging showing solution-widened clay-filled fractures in an Ordovician limestone. P.E. LaMoreaux & Associates in Oak Ridge, Tennessee, used their Sting/Swift system with 56 electrodes at 5 foot spacing to investigate the site. The profile was surveyed using the roll-along technique moving 14 electrodes at a time.


Using resistivity imaging for bedrock mapping in karst terrain.
Interesting example showing how well drill logs match the resistivity images. Schnabel Engineering has drilled 30 wells along three resistivity imaging profiles. The location of the wells are plotted on the profiles and wherever the boring hit bedrock, a crossbar has been placed on the plot. This way it is easy to see how well the resistivity image correlates to the bedrock topography.


Using resistivity imaging for detection of a sewer pipe line.
A buried sewer pipe was detected using resistivity imaging.


Cave detection using resistivity imaging found the Sting Cave.
This is the original Sting cave survey using resistivity imaging.

The geophysical instruments used in the resistivity imaging cases described here are the AGI Sting R1 earth resistivity meter together with the AGI Swift multi electrode cables and smart switches. They make up a system with extremely fast data acquisition in the field.
The interpretation has been done in most cases using the 2D inversion program Res2DInv available from AGI. There is a detailed description page available if you want to study the 2D inversion concept.

Please note:
In order to make it possible to print a good quality brochure the links above will load a large picture (about 150 kb) into a new browser window. When you print the brochure, please adjust the printer page orientation (page setup) to landscape. The brochures are meant to print on Letter or A4 size paper.
When you are ready you should close the window.

Last modified: 2000-11-25 13:25:58 EST


Send comments on our web site to the AGI Webmaster.
Copyright 1999 Advanced Geosciences, Inc