borehole survey Articles

  • The effective resistivity survey distance between two boreholes

    For borehole survey, the effective survey distance works the same way the surface survey does. This means the wider the electrode takeout, the larger the exploration distance. The rule of thumb to calculate the maximum exploration distance between two borehole is the half of the distance between the top electrode in one borehole and the bottom electrode in the other borehole. ...

  • Bridge/tunnel base exploration case study

    Case 1 A surface-borehole resistivity survey completed for bridge construction As shown infigure 1, this surface-borehole survey was configured to accurately locate known caves for structural reasons. The operator collected 60k data points in only one hour as a result of how the FlashRES-UNIVERSAL can collect all voltage readings for each combination of current electrodes. Figure 2 shows that the ...

  • FlashRES application

    FlashRES resistivity system is very flexible in terms of application, it can perform: Surface surveys Surface borehole surveys Crosshole and multiple-holes surveys Surface-points surveys High efficient Mise a la Masse surveys 3D survey Time lapse surveys These survey times can be applied to engineering, mining, arachaeology and ...

  • Surface borehole resistivity survey case study 1

    Surface borehole method can be used to effectively maximise the value of existing boreholes. This is because surface-boreholre method can give operator more geological and geophysical information around the borehole. For example, we did a surface-borehole survey, where there was already well-known mineralisation existing between 60-80m in Figure one and 100-115m. The inversion resistivity ...

  • Mineral prospecting case study 2

    We had recently carried out a copper prospecting survey. Electrodes were placed on the surface at 5m interval, one cable was connected to electrodes on surface and another cable is put in to the borehole. After repeating the surveys at nearby borehole, we generated two resistivity distribution images. We determined that the band of low resistivity approximately 30m below surface has a high chance ...

  • Surface-point resistivity survey case study 1

    Surface-points electrical resistivity surveys area can be used to detect one or several known underground anomalies in timely manner. A minimum of one borehole is needed to carry out Surface-points electrical resistivity surveys. A FlashRES electrical resistivity meter allows users to position active electrodes anywhere they want in the borehole, by conducting the survey in a surface-borehole ...

  • Compare active and passive cables

    Active cables refer to the cable with electronic part in the cable. Control and ADC in resistivity system controls the electronic parts in the cable, which controls the current injection. Passive cables refer to the cable with no electronic part in the cable. One of the advantage of passive cables is its ability to borehole and marine surveys, operator can put passive cables in water. Putting ...

  • Electrotelluric Geophysical Exploration

    Noted petroleum geologist Jack Elam writes about the abilities of Geophysic's patented electrotelluric tool known as the Petro-Sonde.  It's ability to give the client the depth, thickness and contents of a pay zone without the need for boreholes first.  By far the most advanced surveying tool on the market today the Petro-Sonde has been used in thousands of surveys all across the globe. ...


    By Geophysics International

  • Samanalawewa Dam Willowstick Survey - Case Study

    Willowstick rapidly located leak at dam troubled for decades After 18 years of unsuccessful remediation work costing tens of millions of dollars Willowstick identified the exact leakage pathway in less than a month. This enabled the client to carry out targeted remediation works at a fraction of the original cost. The leakage path identified by Willowstick was significantly ...


    By Willowstick Technologies LLC

  • GPS-enabled gas analyser finds & proves borehole locations case study

    Prove it? They can now! Landfill technicians and environmental consultants can now find and prove borehole locations with a GPS-enhanced portable gas analyser from Geotech. Its on-board GPS guidance system takes staff to the precise location of the 1000 it can store. It adds the GPS-received location, date and time to the gas analysis record. GPS locations can be added at boreholes or pre-loaded ...

  • Heap Leach Pad Monitoring - Case Study

    2D Electrical Resistivity Imaging Objective Study was performed at a Heap Leach Copper Mining site in Chile to determine the impervious zones for the irrigation. The first base survey is performed to locate the impervious zones to be able to improve irrigations. The second monitoring survey is performed after 50 days of irrigation through drilled ...


    By Advanced Geosciences, Inc.

  • KASTHEW Borehole-Drilling Company Uganda Ltd Co. Profile; http://www.kasthewdrilling.co.ug/

    www.kasthewdrilling.co.ug We are Kasthew Borehole / Water Drilling Company Ltd (Uganda). We offer bore-hole drilling services under our company (Kasthew Drilling Co. Ug Ltd). Our team has an experience of handling above 420 projects (in the last 8 years across villages in Uganda and South Sudan. www.kasthewdrilling.co.ug The following are among our listed services; (Uganda) ...

  • 3D Offshore Imaging for Seawater Intake for Desalination Plants - Case Study

    AGI’s Multi-Electrode Switch Box is an accessory to the SuperSting Wi-Fi. It allows the SuperSting Wi-Fi to automatically ...


    By Advanced Geosciences, Inc.

  • Borehole logging case study

    Corozal, Puerto Rico GeoView was tasked to conduct borehole geophysical logging of at a groundwater extraction well in the rural area of the Municipality of Corozal, Puerto Rico. Prior groundwater tests indicated possible contamination of the groundwater. The study area was primarily underlain by stratified, mostly dark gray basaltic tuff, andesite and basalt porphyry rocks assigned to ...


    By GeoView, Inc.

  • A novel approach for providing potable water in rural Sodwana Bay, northern Kwazulu-Natal, South Africa

    Many people living in the Sodwana area of South Africa do not have access to potable water. Groundwater is the best source of fresh water for the rural community. Potable water in the Zululand coastal plain, Sodwana, South Africa can be enhanced by: (i) providing detailed information on the aquifer system using geophysics; (ii) providing information on groundwater quality and its efficient ...


    By IWA Publishing

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