geophysics information Articles

  • 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

  • Geophysics: Refraction / ReMi surveys at a proposed wind farm

    PROJECT: Refraction and ReMi geophysical surveys at a proposed Wind Farm LOCATION: West of Ellensburg, Washington PROJECT DESCRIPTION: Designed and performed seismic refraction / ReMi surveys at 22 proposed Wind Turbine Generator sites for the primary purpose of obtaining shear-wave (Vs) and compressional-wave (Vp) velocities. This information enabled ...


    By ECA Geophysics

  • Integrated Geophysics: Combining methods to obtain a better perspective

    The combined information from different geophysical surveying methods often allows ECA's geophysicists to provide interpretations with much greater confidence. Magnetics with Electromagnetic Induction (EMI) GPR with Magnetics and/or EMI GPR with Metal Detection (EMI or EM-61) Seismic with EMI ...


    By ECA Geophysics

  • Geotechnical Geophysics: ReMi surveys for retail store expansions

    PROJECT: Refraction Microtremor (ReMi) surveys at active national chain stores LOCATIONS: Wenatchee, Washington / Woodinville, Washington / Yakima, Washington PROJECT DESCRIPTION: Designed and performed ReMi Surveys for active retail properties to passively measure microtremors within the upper 100 feet (30 meters) of the subsurface, in order to acquire ...


    By ECA Geophysics

  • Geotechnical Geophysics: Seismic refraction and refraction microtremor (ReMi) surveys

    ReMi Surveys are superior to MASW Surveys in the following ways: Ambient (ie, traffic and aircraft) “noise” is a hindrance to MASW surveys, yet is readily embraced / utilized by “passive” ReMi surveys Longer ReMi data records (ie, 30 seconds vs 8 seconds or less with MASW) capture lower frequency events We introduce high frequency impulsive energy that ...


    By ECA Geophysics

  • Hydrogeophysics (Groundwater Geophysics): SuperSting R8 multi-electrode electrical resistivity surveys at a closed refinery

    PROJECT: Multi-electrode SuperSting geophysical surveys at a complex abandoned petroleum refinery site in Montana LOCATION: Montana (specific location is Confidential, per client's request) PROJECT DESCRIPTION: Designed and performed SuperSting 56-electrode geophysical surveys across approximately 50 acres of land that once supported a long-established ...


    By ECA Geophysics

  • Analyzing and representing Downhole information on a daily basis using ESdat and Encom Discover - Case Study

    GHD used ESdat to optimize data collection and analysis and minimize data handling when working with downhole data information. 3D data output was provided by Encom Discover. Overview GHD is an professional services consultancy – 6000+ staff and offices in Australia, Middle East, Asia & Americas.  GIS used extensively within GHD with a ...

  • Unexploded ordinance case study

    Jacksonville, Florida A geophysical investigation was conducted at a World War II era bombing range in the eastern United States. The site was approximately 2,000 feet by 300 feet in plan dimension. Historical information indicated that MK23 practice bombs, 2.75” rockets, and 100 pound practice bombs were used at the site. The purpose of the geophysical investigation was to ...


    By GeoView, Inc.

  • Integration & Joint Interpretation of Passive Seismic Tomography, Gravity and MT Data - Case Study

    Integration & Joint Interpretation of Passive Seismic Tomography, Gravity and MT Data The scope of this project was an integrated interpretation of the Passive Seismic Tomography, Gravity and Magnetotelluric data, acquired in the Delvina Gas field area in the context of the according geophysical surveys. Although the Delvina Gas field has a marginal production, the only ...


    By SeismoTech Ltd

  • 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

  • MT & Gravity Survey in Delvina, Albania - Case Study

    MT & Gravity Survey In November 2012, SeismoTech s.ltd. was awarded a Gravity and Magnetotelluric survey in the Delvina Area (SW Albania), by Stream Oil & Gas Ltd. The scope of this project was to enrich with additional geophysical information the Delvina Gas field area, in order to conclude on optimum locations for well-drilling. The Delvina Gravity and ...


    By SeismoTech Ltd

  • Buried debris case study

    Saufley Field, Escambia County, Florida GeoView was tasked with performing a geophysical investigation at a military base in the southeastern United States. The purpose of the investigation was to locate a reported debris burial pit. The burial pit was reported to be 60 feet (ft) in length and up to 10 ft deep. Historical records indicated that the pit  contained buried drums and ...


    By GeoView, Inc.

  • Seismic reflection, seismic crosshole and ground penetrating radar case study

    Geophysical Investigation of the Crosstown Expressway. Tampa, FL In April, 2004 Pier 97 which supported an elevated roadway in Tampa, FL was vertically displaced (collapsed) approximately 10 feet (ft). At the time of the collapse it was not known whether the collapse was associated with geological conditions at the site, specifically karst conditions, or whether is was associated with a ...


    By GeoView, Inc.

  • 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 ...

  • Geo Drilling International: Hands-On

    Boart Longyear has launched a core-orientation system made for drillers, by drillers Although critical for mapping exploration and minesite development, core orientation is part of the drilling process that has experienced only incremental product improvements through small changes to the process and equipment. Boart Longyear has now introduced TruCore, a first-inindustry integrated ...


    By Boart Longyear Inc.

  • 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

  • White paper - RaMPS technology explained

    1. Introduction RaMPS, which stands for Resistivity Mono-pole Profiling and Sounding, is a unique and proprietary geophysical survey and exploratory methodology developed by Willowstick Technologies by combining traditional resistivity sounding and profiling techniques into an integrated surveying method. It is not only unique in the way the data is acquired, but unique in the way the ...


    By Willowstick Technologies LLC

  • Vertical disparity in electrical conductivity of groundwater: inferring water-bearing fractures in granitic aquifer

    A detailed study was conducted in hard rock terrain for delineating water-bearing fractures using electrical conductivity (EC) logs. The EC logs of groundwater were taken both in pre- and post-monsoon seasons of the year 2001; in 25 borewells in a small granitic watershed at an interval of 1 m right from the water table (though narrow spacing wherever required) till the depth to bottom of the ...


    By Inderscience Publishers

  • Field Analytical and Site Characterization Technologies: Summary of Applications

    Abstract This report provides information about experiences in the use of field analytical and site characterization technologies at contaminated sites drawn from 204 applications of the technologies listed below. For each technology, information is presented on the reported uses of the technology; including the types of pollutants and media for which the technology was used; reported advantages ...

  • Passive Seismic

    Passive seismic exploration methodology, in particular the IPSS/IPDS (Infrasonic Passive Seismic Spectroscopy/ Infrasonic Passive Differential Spectroscopy ) and PST/MST (Passive Seismic Tomography/Micro Seismic Tomography) technique uses spectroscopic and time analysis of the seismic background noise acquired passively using high sensitivity VBB (Very Broad Band) 3D seismometers.  Passive ...

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