borehole surveying Articles

  • 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 ...

  • 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. ...

  • 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.

  • Railroad survey application

    Introduction The GPR technology has been introduced to the railroad engineers as one of the easy tools for quick and non-invasive railroad inspection. Since these surveys tend to stretch for a number of kilometers the amount of data can be overwhelming. However, with some clever preparations and proper tools for post processing the data one can create swift and easy to understand ...


    By Geoscanners AB

  • Borehole Video Systems – Making A Difference…

    This article was originally published in the May 2009 issue of Geodriling International. Mike Deed, Managing Director of Geoquip Water Solutions Ltd, considers how the Laval R-Cam 1000 portable downhole video camera could revolutionise the borehole inspection industry. THE ability to see into a deep borehole has been an aspiration for well drillers, well owners, and geologists ...


    By Geoquip Water Solutions

  • Scanning proposed borehole locations for Utilities case study

    Environmental and engineering firms often are tasked with performing soil borings for monitor well installation as part of a Phase II Environmental Site Assessment. This task becomes more challenging when the borings are to be installed in gasoline stations, right of ways or other areas where there are numerous underground utilities that are either unmarked or not properly located. GeoView can ...


    By GeoView, Inc.

  • Surface-point resistivity survey - Case Study

    Drilling boreholes for exploration can be cost ineffective and time consuming. Doing surface-point resistivity survey can provide fast and accurate results, with known position of the target, FlashRES can utilize its electrodes in borehole to target the position of the target, this enables operators to have a good understanding of the interested area. Surface-point resistivity method can also ...

  • 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 ...

  • Top Water/ Borehole Drilling Companies in Uganda (East Africa)

    Rural water being a source for health, an essential nutrient and a building block for peoples’ lives in local communities cannot be sustained without external support in form of boreholes as they are the ‘surefire’ answer to providing fresh water in rural communities. A borehole is simply a deep-hole or a shaft sunk into the earth purposed ...

  • Crosshole resistivity survey case study 2

    Crosshole resistivity survey to search out industrial waste water This exploration survey used the crosshole resistivity technique to observe whether or not an industrial waste water plant is leaking. Chemical analyses found that this specific waste water has a low resistivity compare to normal groundwater. Our recent example shows at depth of 45m a comparatively high resistive zone fabricated ...

  • Crosshole resistivity survey case study 1

    Crosshole resistivity survey to find water Crosshole survey can be very effective in detecting groundwater and fracture zone. In some case, even with environmental limitation, where only a handful electrodes can be depolyed, crosshole resistiviy survey can still produce sound result. For example, in one of the survey we did, seven and fourteen electrodes were employed in the left and ...

  • 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) ...

  • 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 ...

  • Demand for domestic water from an innovative borehole system in rural Ghana: stated and revealed preference approaches

    This study investigates demand for domestic water supply from an innovative borehole system using the contingent valuation method (CVM). We further estimate demand for current service of domestic water supply in residences using the hedonic pricing method (HPM). This is achieved through a survey from rural districts of the Greater Accra Region, Ghana. Interval regression and ordinary least ...


    By IWA Publishing

  • Case Study - Mapping Gold Deposits with Induced Polarization Surveys, Yukon, Canada

    Site:  Rockhaven Resources Ltd. Klaza property in Yukon Territory, Canada Equipment:  SuperStingR8 with AGI 84 electrode passive electrical imaging cable, 5 meter electrode spacing, inverse schlumberger array, boost mode(200W output), Direct Samples:  Reverse circulation drilling and geochemical analysis of core samples. Results:  SuperStingR8 induced ...


    By Advanced Geosciences, Inc.

  • 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 ...

  • Void and cave detection case study

    Case 3 A crosshole resistivity survey to find karst caves for deep foundation construction          This survey is aimed to find voids for construction safety purpose, as figure below shows, 32 and 20 electrodes were placed into two boreholes respectively. Inversion image found low resistivity areas beside boreholes were likely to be karst caves. Later ...

  • 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 ...

  • 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

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