geophysical logging in coal exploration
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Circular 891 - Geophysical Logs as a Source of Coal Bed Data
- https://pubs.usgs.gov/circ/c891/geophysical.htm
- Geophysical logs can also provide information on the composition and rank of coal. High-ash or shaly zones (partings) in coal generally are recorded on logs by curves indicating that they are more radioactive, more dense, and less resistive than purer coal.
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Geophysical Well Logging Techniques in Coal Exploration ...
- https://www.researchgate.net/publication/316662847_GEOPHYSICAL_WELL_LOGGING_TECHNIQUES_IN_COAL_EXPLORATION_-_A_CASE_STUDY_OF_SIJUA_JAMADOBA_GROUP_OF_COLLIERIES_OF_TATA_STEEL_LIMITED
- Geophysical well logging is quite useful in identifying coal bands / seams since coal has several unique physical properties viz., low natural radio activity, low density and high resistivity and...
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Coal Exploration and Geophysical Logging, with Insitu ...
- http://www.geologyrocks.ca/exp-dynamics.html
- These picks were sections of core that occurred between set geophysical points found on the API scale of the Gamma/Gamma geophysical log. You must look very closely at the coal in your core box to find these points. Lower API numbers will indicate less ash content and the coal will become brighter, harder and cleaner.
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Geophysical borehole logging handbook for coal exploration ...
- https://www.osti.gov/etdeweb/biblio/6807887
- Abstract This handbook provides the essential theory and practice of geophysical logging as it applies to coal exploration and is not designed as a theoretical textbook. It contains a brief history of geophysical logging, basic coal geology, and an introduction to coal exploration.
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Applications of Geophysical Logs to Coal Mining—Some ...
- https://www.mdpi.com/2079-9276/9/2/11/htm
- This paper presents some examples of geological and geotechnical characterizations from geophysical logs at various coal mines in Australia and India. The applications include rock strength and coal quality estimations, automated lithological/geotechnical interpretation and geophysical strata rating, all based on geophysical logs.
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(PDF) Applications of Geophysical Logs to Coal Mining—Some ...
- https://www.researchgate.net/publication/338761826_Applications_of_Geophysical_Logs_to_Coal_Mining-Some_Illustrative_Examples
- This paper presents some examples of geological and geotechnical characterizations from geophysical logs at various coal mines in Australia and India. The applications include rock strength and...
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Nuclear geophysical logging for Gondwana coal exploration ...
- https://link.springer.com/article/10.1007/s12517-011-0484-3
- Kempton NH, Peeters M, Shell Development (Australia) Proprietary Limited 1977 Wireline logging for coal exploration in Australia. The log analyst, Volume XVIII, Number 3. Kerr SA, Worthington PF (1988) Nuclear logging techniques for hydrocarbon, mineral and geological applications. IEEE Trans Nucl Sci 35(1):794-799
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PDF Downhole Geophysical Logging Applications for Mining ...
- http://www.virginiacoalenergy.com/pdfs/2018/pe/Kevin%20Andrews%20MMA-3-29-2018.pdf
- Introduction - Geophysical Logging Applications Mineral Exploration: Coal, Limestone, Aggregates, Uranium, Metal Ores, Other Minerals, and Oil and Gas. (Two general types of logging probes, Oil and Gas and "Mineral Logging" probes - higher resolution, smaller diameters, etc. Used for mineral investigations)
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PDF Introduction to Geophysical Well Logging and Flow Testing
- http://large.stanford.edu/courses/2018/ph240/owusu-agyeman2/docs/ofwona-2010.pdf
- Geophysical well logging 3 Ofwona • Determining cement bond quality between cement and casing and also between cement and formation for zone isolation • Correlating open hole logs to cased hole logs using the Casing Collar Locator (CCL) and Gamma Ray tool • Indication of cement compressive strength. These tools can also measure casing thickness,
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PDF Geophysical Methods in Exploration and Mineral ...
- https://pubs.usgs.gov/of/1995/ofr-95-0831/CHAP3.pdf
- related to the multiplicity of sources that can cause geophysical anomalies. This feature is an implicit uncertainty in the discussion that follows. Environmental geophysics, like exploration geophysics, requires complimentary geophysical surveys integrated with geochemical and geologic insight. This presentation first summarizes geophysical ...
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PDF Coal Exploration and Mining Geology
- https://www.eolss.net/Sample-Chapters/C01/E6-15-08-03.pdf
- The object of coal exploration is to determine the nature, location and extent of coal resources in a particular situation, such as a coal mining lease or a coal-bearing sedimentary basin, and to identify the geological factors that may affect its economic, safe and environmentally-acceptable mining and use.
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Identification of coal seam strata from geophysical logs ...
- https://www.sciencedirect.com/science/article/abs/pii/S0926985108000931
- Geophysical logging reflects the physical and chemical properties of coal through the characteristics of acoustical, electrical, radioactive detections [2,8,9]. The geophysical logs of coals show low natural gamma, low density, high caliper and high resistivity [2,7,9-11]. Show abstract
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PPTX PowerPoint Presentation
- https://www.aseg.org.au/sites/default/files/2015%20ASEG%2006_Cogswell%20-%20Geophysical%20logging%20for%20coal%20-%20current%20techniques%20-%20Borehole%20Wireline.pptx
- Coal is an ideal rock for geophysical logging: bedded deposit fills the detector sample volume. has distinctive physical properties. Multiple logging techniques identify coal/partings measure depth to roof/floor correlate seam between boreholes measure coal quality parameters measure elastic rock properties/rock hardness
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Coal Exploration - an overview | ScienceDirect Topics
- https://www.sciencedirect.com/topics/earth-and-planetary-sciences/coal-exploration
- 2.1.1 Coal reserves and distribution Coal exploration activities to discover coal reserves include creating a geological map of the area, carrying out geochemical and geophysical surveys and exploration drilling. The mining operation only begins if the coal can be economically recovered.
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(Doc) Geophysical Well Logging Data Interpretation and ...
- https://www.academia.edu/es/8334351/GEOPHYSICAL_WELL_LOGGING_DATA_INTERPRETATION_AND_ANALYSIS_OF_DENSITY_LOG_RELATIONSHIP_WITH_THE_QUALITY_OF_COAL_IN_THE_EASTERN_AREA_OF_AIRLAYA_MINE_SOUTH_SUMATRA
- Application of well logging methods on a 9 point exploration wells and interpretation of gamma ray log and density log data using WellCAD 4.3. has been done to determine the subsurface lithology and direction of the spread of coal seam at Air Laya
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PDF COAL EXPLORATION The exploration for coal is by nature an ...
- https://scclmines.com/downloads/exploration.pdf
- 12. Geophysical logging: •A total of 275 boreholes were geophysically logged involving 1,08,827m to supplement exploration data as against a total of 209 boreholes involving 86,752m during 2011-12, which is the highest ever logged metreage by any organisation in India in coal basin.
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Integration of Downhole Geophysical and Lithological Data ...
- https://www.tandfonline.com/doi/pdf/10.1071/ASEG2018abM2_2A
- The most important geophysical variable for coal geologists is the density log which is used to find coal seam boundaries. As the density log uses a gamma radiation source and detector with a specific separation distance, the resolution of the tool is limited by this distance.
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Nuclear geophysical logging for Gondwana coal exploration ...
- https://www.academia.edu/5898913/Nuclear_geophysical_logging_for_Gondwana_coal_exploration_a_case_study_at_Phulbari_Coal_Basin_northern_part_of_Bangladesh
- the introduction prime benefit of geophysical logging is that it allows detailed interpretation of noncored holes, permitting either the usual procedure for exploration of coal is to drill a substitution of diamond drilling or extension of drilling large number of boreholes and undertake analysis of drill programs on the same budget, based on …
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Exploration methods - geophysical well logging | Info ...
- https://infolupki.pgi.gov.pl/en/technologies/exploration-methods-geophysical-well-logging
- Geohysical well logging. Geophysical well logging (borehole logging,) is a set of borehole investigation methods that are based on special logging tools.. First developed in the beginning of the 20th century, well logging comprises today several tens of methods that involve measurements of natural or induced physical fields in the borehole.
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Geophysical borehole logging handbook for coal exploration ...
- https://searchworks.stanford.edu/view/1518241
- Responsibility by G.L. Hoffman, G.R. Jordan & G.R. Wallis. Imprint Edmonton, Alberta, Canada : Coal Mining Research Centre, 1982. Physical description
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Coal quality from geophysical logs for enhanced resource ...
- https://publications.csiro.au/rpr/download?pid=csiro:EP157964&dsid=DS2
- Figure 5 The borehole distribution of coal quality and geophysical logging data from Anglo American. . 17 Figure 6 Correlations of laboratory coal quality parameters with relative density (air-dry basis). The regressions are in trends observed normally, suggesting the measured ash coal quality parameters and
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Quantitive Geophysical Log Interpretation for Geotechnical ...
- https://www.ausimm.com/publications/conference-proceedings/sixth-international-mining-geology-conference/quantitive-geophysical-log-interpretation-for-geotechnical-and-geological-assessment-of-coal-measure-rocks/
- Borehole geophysical logging data are routinely acquired during exploration of coal deposits in Australia. These data are commonly used qualitatively to identify and correlate coal seams and geotechnically significant interburden rock units. Some quantitative analysis, such as using sonic logs for rock strength estimation is becoming increasingly widespread.
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Geophysics at the Coal-Face: Exploration Geophysics: Vol ...
- https://www.tandfonline.com/doi/abs/10.1071/EG992087
- Because surface coal mining is constrained to shallow seams, most exploration is achieved by drilling methods, with geophysics playing a supporting but subordinate role. Also surface mining is less sensitive to seam disturbances such as faulting, rolls and intrusions, and can afford to set less strict requirements for prediction and resolution.
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Nuclear geophysical logging for Gondwana coal exploration ...
- https://www.deepdyve.com/lp/springer-journals/nuclear-geophysical-logging-for-gondwana-coal-exploration-a-case-study-NmJY0vlOFk
- Abstract. Arab J Geosci (2013) 6:1647-1655 DOI 10.1007/s12517-011-0484-3 ORIGINAL PAPER Nuclear geophysical logging for Gondwana coal exploration: a case study at Phulbari Coal Basin, northern part of Bangladesh Md. Ibrahim Khalil & Farhana Islam & Eunuse Akon Received: 1 June 2011 /Accepted: 11 November 2011 /Published online: 25 November 2011 Saudi Society for Geosciences 2011 Abstract ...
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PDF Coal Exploration and Mining - EOLSS
- https://www.eolss.net/Sample-Chapters/C08/E3-04-01-02.pdf
- A program of geological exploration for coal usually has one of two possible objectives: (a) to find an area from which a given amount of coal of a specific quality may be successfully recovered, or (b) to determine the amount and quality of coal that can be economically extracted from a given area.
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PDF Application of Well Logging Techniques for Identification ...
- https://www.longdom.org/open-access/application-of-well-logging-techniques-for-identification-of-coal-seams-a-case-study-of-auranga-coalfield-latehar-district-jharkha-2381-8719-1000322.pdf
- Application of Well Logging Techniques for Identification ...
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