borehole log Articles

  • Borehole Log Interpretation

    While employed with Conoco, Inc. analyzed and correlated well-log data in order to produce geologic structural maps of subsurface horizons in Louisiana and Oklahoma, for the purpose of oil and gas prospect generation. Analyzed and correlated well-log data in order to map the top of a highly permeable subsurface formation that was utilized as an injection zone for the disposal of brines generated ...


    By ECA Geophysics

  • 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.

  • Using the Pencil-Paper Method with a Tablet Computer to Increase Borehole / Well Logging Efficiency

    Traditionally, geologists use pencil and paper when logging soil descriptions, drilling tests, and well diagrams in the field.  We wanted to see if we could speed up this process using a field computer.  We tested a fully ruggedized Yuma2 tablet computer (retail value of $3500) and a consumer grade Dell Venue 8 (retail value $250).  Both computers run a full version of Windows 7 or ...


    By M-Tech Software Inc.

  • Determining the circulation depth of thermal springs in the southern Rocky Mountain Trench, south-eastern British Columbia, Canada using geothermometry and borehole temperature logs

    Geochemical data for thermal spring waters along the southern Rocky Mountain Trench in British Columbia, Canada were examined. The range of equilibration temperatures for the thermal springs is between 24 and 59°C, assuming that there is minimal mixing with colder shallow waters that might lead to a lowering of the calculated equilibration temperature. The chalcedony geothermometer is found to be ...


    By Springer

  • Application of Advanced Modelling Tools to Evaluate Uncertainty in Modelling Predictions

    With any modelling prediction there is a degree of uncertainty that corresponds to the uncertainty in defining hydraulic and chemical parameters spatially throughout the model domain. With geologic investigations we must interpolate between point information (borehole logs) to define continuous spatial properties through the model area. In addition, many parameters such as effective porosity and ...


  • Portable Remotely Operated Drill (PROD): Hydrocarbon Sensing System

    Proven Technology Benthic’s prototype Hydrocarbon Sensing System (HSS) analyses drill returns for the presence of hydrocarbons as they pass through PROD before being vented on the seafloor. The System, in its present form, includes two hydrocarbon sensors in line with the drill returns path. Drill returns, composed of seawater drawn from above PROD and pumped down the drill ...


    By Franatech GmbH

  • Landfill groundwater monitoring network design and construction quality assurance (CQA)

    The site is an active landfill site situated in the north east of England.  The company managing the site was unhappy with the groundwater monitoring infrastructure around the site margins. ESI Ltd was commissioned to advise on locating and designing ten groundwater monitoring wells.  Following agreement with the Environment Agency, we also provided independent construction quality ...

  • Undrained Deformability and Strength Characteristics of Soft Bangkok Clay By the Screw Plate Test

    Eighteen screw plate tests were carried out using 10-in. 25.4-cm diameter plate, and three types of laboratory test were performed, namely, 18 unconfined tests, 31 unconsolidated-undrained triaxial tests, and 18 one-dimensional consolidation tests. The sampling and testing were carried out at three sites inside the campus of the Asian Institute of Technology in the soft clay layer. At each site, ...


    By ASTM International

  • A GIS-based methodology to delineate aquifer recharge areas

    A GIS-based methodology to delineate risk areas for contamination of groundwater resources is presented by identifying recharge conditions to the aquifer. Identifying the recharge areas is based upon surface and subsurface geologic conditions that may control the risk of potential oil spill contaminants into the aquifer. This study uses the Chicot aquifer system in southwest Louisiana as a pilot ...


    By Inderscience Publishers

  • Flow measurement technology comparison: GA5000 Vs Hot Wire Anemometer

    A typical landfill or contaminated land site under investigation will comprise of a suitable number of gas monitoring wells, with a planned series of monitoring visits.  The monitoring will include gas flow measurements, which together with methane and carbon dioxide concentrations will be used to calculate gas screening values (GSV) and hence allow the determination of whether any gas ...


    By Geotech

  • Soil and groundwater assessment, south-east England

    Project Remediation Strategies were appointed to undertake a soil and groundwater assessment to assist a client in understanding the potential environmental liabilities associated with the shallow soils beneath part of the site.  The client was undertaking a phased renewal of the site tank farm areas, which required the excavation and replacement of shallow soils to allow for new ...


    By Remediation Strategies Ltd.

  • Above Watertable Landfill (Groundwater Risk Assessment)

    Client: Waste Management Industry Location: Co-disposal landfill site Services: Hydrogeological risk assessment, landfill monitoring borehole installation, sample collection and data interpretation. Issues: Change in waste stream and potential risk to groundwater,  Summary: ESI provided site ...

  • Managanese study: Severn Trent

    Severn Trent Water operates a number of boreholes which abstract water from the underlying Sherwood Sandstone aquifer in the West Midlands.  Prior to 2000, manganese concentrations at one of these sources were reported to be <5µg/l but by 2002 were found to be significantly higher than this.  This posed a possible threat to the source.  Further sampling in 2007 suggested ...

  • Above watertable landfill (groundwater risk assessment)

    Client: Waste Management Industry Location: Co-disposal landfill site Services: Hydrogeological risk assessment, landfill monitoring borehole installation, sample collection and data interpretation. Issues: Change in waste stream and potential risk to groundwater,  Summary: ESI provided site ...

  • 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 ...

  • Groundwater quality assessment of a freshwater wetland in the Selangor (Malaysia) using electrical resistivity and chemical analysis

    Groundwater quality of the Paya Indah Wetland (PIW) was targeted for the present study using integrated two-dimensional electrical resistivity imaging (ERI) and hydrochemical surveys. Electrical resistivity and the influence of variations in the lake level were investigated using daily water balance measurements, water sampling and geochemical analysis, and well-logging. The geoelectrical ...


    By IWA Publishing

  • Fractured Bedrock Remediation - Case Study

    ABSTRACT BOS 200® successfully remediates petroleum groundwater impacts in fractured bedrock at a former truck stop. Based on the post-injection groundwater results from the pilot test and full-scale injection, a No Further Action letter was issued in February 2015. CHALLENGES Over a period of 20 years, site investigation activities revealed a 320 foot ...

  • Multilevel Systems

    Untitled Document Introduction A multilevel system is a groundwater monitoring device which allows ...


    By Solinst Canada Ltd.

  • Assessing the transport and fate of MTBE

    Untitled Document ...


    By Solinst Canada Ltd.

  • Evaluating Cleanup at Hamilton Army Airfield Using EQuIS and ArcGIS

    The Sacramento District, US Army Corps of Engineers, is implementing EarthSoft's EQuIS and ArcGIS for better management, analysis, and response to landfill remedial activities being conducted at the former Hamilton Army Airfield. This former Air Force Base located four miles south of the city of Novato, on San Pablo Bay, in Marin County, California, is undergoing environmental clean-up as it is ...


    By EarthSoft, Inc

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