THE EFFECT OF MOISTURE ON THE DIRECT CURRENT RESISTIVITIES OF OIL SANDS AND ROCKS

Geophysics ◽  
1937 ◽  
Vol 2 (1) ◽  
pp. 33-54 ◽  
Author(s):  
J. J. Jakosky ◽  
R. H. Hopper
Keyword(s):  
Electrical Resistivity ◽  
Moisture Content ◽  
Oil Sands ◽  
Research Work ◽  
Geophysical Methods ◽  
Inverse Function ◽  
Oil Sand ◽  
High Electrical Resistivity ◽  
Electrical Conductivities ◽  
Hyperbolic Form

This paper contains the results of detailed research study to determine the factors which govern the electrical conductivities of oil sands and rocks. The experimental work shows the electrical resistivity to be an inverse function of the percentage of conductive water present in any rock type. It was found that the resistivity‐moisture curve of both petroliferous and non‐petroliferous rock are of a general hyperbolic form. For the higher values of moisture content, the curves rapidly approached the conductivity of the electrolyte contained within the rock or oil sands, while for the lower values of moisture content the resistivity values are high and governed by the properties of the rock. Rocks containing soluble salts have critical points on their resistivity‐moisture curves, with the greatest change occurring in the neighborhood of ten per cent moisture content. Rocks containing fresh water have relatively high resistance values which change fairly uniformly with the variations in moisture content. The research work indicates that the presence of oil does not appreciably effect electrical resistance of the rock. Since the resistivity values are dependent upon the electrolytic effect, the work indicates that resistivity values alone are not a reliable criterion for predicting the presence or absence of an oil sand. The work explains further why high electrical resistivity values are not to be expected when applying electrical geophysical methods for mapping subsurface structure.

Electrical properties of Athabasca Oil Sands

1979 ◽  
Vol 16 (10) ◽  
pp. 2009-2021 ◽  
Author(s):  
F. S. Chute ◽  
F. E. Vermeulen ◽  
M. R. Cervenan ◽  
F. J. McVea
Keyword(s):  
Electrical Properties ◽  
Moisture Content ◽  
Oil Sands ◽  
Relative Dielectric Constant ◽  
Dielectric Constants ◽  
Graphical Form ◽  
Oil Sand ◽  
Wide Range ◽  
Realistic Assessment

The results of a series of laboratory measurements of the electrical properties of samples of oil sand from the Athabasca deposit in northeastern Alberta are reported. The electrical conductivity and relative dielectric constant of the samples have been determined over a frequency range extending from 50–109 Hz. The measurements were performed on samples with a wide range of moisture content and over a temperature range from about 3–150 °C. A discussion of the methods and apparatus used is included.Sufficient data have been collected to permit correlation of the electrical properties of oil sand with density, moisture content, and temperature, and hence to indicate how the laboratory results can be extended to estimate in situ conductivities and dielectric constants. The results of these correlations, which are presented in graphical form, are of fundamental importance in any realistic assessment of the viability of electromagnetically heating large in situ deposits of oil sand.

scholarly journals Time-Lapse Electrical Resistivity Investigations for Imaging the Grouting Injection in Shallow Subsurface Cavities

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Muhammad Farooq ◽  
Samgyu Park ◽  
Jung Ho Kim ◽  
Young Soo Song ◽  
Mohammad Amjad Sabir ◽  
...  
Keyword(s):  
Electrical Resistivity ◽  
Research Work ◽  
Geophysical Methods ◽  
Ground Surface ◽  
Mineral Resources ◽  
Direct Methods ◽  
Time Lapse ◽  
Mechanical Resistance ◽  
Borehole Camera ◽  
Subsurface Cavities

The highway of Yongweol-ri, Muan-gun, south-western part of the South Korean Peninsula, is underlain by the abandoned of subsurface cavities, which were discovered in 2005. These cavities lie at shallow depths with the range of 5∼15 meters below the ground surface. Numerous subsidence events have repeatedly occurred in the past few years, damaging infrastructure and highway. As a result of continuing subsidence issues, the Korean Institute of Geosciences and Mineral Resources (KIGAM) was requested by local administration to resolve the issue. The KIGAM used geophysical methods to delineate subsurface cavities and improve more refined understanding of the cavities network in the study area. Cement based grouting has been widely employed in the construction industry to reinforce subsurface ground. In this research work, time-lapse electrical resistivity surveys were accomplished to monitor the grouting injection in the subsurface cavities beneath the highway, which have provided a quasi-real-time monitoring for modifying the subsurface cavities related to ground reinforcement, which would be difficult with direct methods. The results obtained from time-lapse electrical resistivity technique have satisfactory imaged the grouting injection experiment in the subsurface cavities beneath the highway. Furthermore, the borehole camera confirmed the presence of grouting material in the subsurface cavities, and hence this procedure increases the mechanical resistance of subsurface cavities below the highway.

scholarly journals GEOPHYSICAL SURVEY AT THE OMALOS PLATEAU, CHANIA, CRETE

2004 ◽  
Vol 36 (3) ◽  
pp. 1204
Author(s):  
Α. Βαφείδης ◽  
Μ. Μανούτσογλου ◽  
H. Hamdan ◽  
Ν. Ανδρονικίδης ◽  
Μ. Κουκαδάκη ◽  
...  
Keyword(s):  
Electrical Resistivity ◽  
Seismic Refraction ◽  
Geophysical Methods ◽  
Geophysical Survey ◽  
Electrical Tomography ◽  
Preliminary Results ◽  
The Third ◽  
High Electrical Resistivity ◽  
Electrical Mapping ◽  
Karstic Features

This paper discusses the preliminary results of a geophysical survey that was carried out at the Omalos plateau in Chania, Crete. The geophysical survey included measurements of electrical tomography, electrical mapping, seismic refraction, georadar, VLF and gravity. The aim of this survey is to compare the results from different geophysical methods used in imaging dolines and karstic features. The processing of the measurements indicates three geoelectrical layers. The first layer of extremely high electrical resistivity is attributed to alluvial - dilluvial deposits. The second layer of very low electrical resistivity reflects mainly the presence of marls. Finally, the third geoelectrical layer outlines the carbonate bedrock, whose relief appears highly irregular. The comparison of all geophysical methods leads to the same results, concerning the detection of dolines and karstic anomalies at the Omalos plateau.

Geotechnical investigation through SP, Electrical Resistivity and GPR geophysical methods

Geotecnia ◽  
2016 ◽  
Vol 137 ◽  
pp. 141-155
Author(s):  
Herson Oliveira da Rocha ◽  
◽  
Lúcia Maria Costa e Silva ◽  
João Andrade dos Reis Júnior ◽  
◽  
...  
Keyword(s):  
Electrical Resistivity ◽  
Geophysical Methods ◽  
Geotechnical Investigation

EVANOHM

Alloy Digest ◽  
1960 ◽  
Vol 9 (4) ◽  
Keyword(s):  
Electrical Resistivity ◽  
Low Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Temperature Coefficient ◽  
Base Alloy ◽  
Nickel Base Alloy ◽  
Temperature Coefficient Of Resistance ◽  
High Electrical Resistivity ◽  
Nickel Base

Abstract EVANOHM is a nickel-base alloy having low temperature coefficient of resistance and high electrical resistivity. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on joining. Filing Code: Ni-57. Producer or source: Wilbur B. Driver Company.

EVANOHM ALLOY S

Alloy Digest ◽  
1989 ◽  
Vol 38 (7) ◽  
Keyword(s):  
Electrical Resistivity ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Temperature Coefficient ◽  
Electromotive Force ◽  
Temperature Coefficient Of Resistance ◽  
Resistance Wire ◽  
High Electrical Resistivity ◽  
Optimum Stability

Abstract EVANOHM alloy S offers optimum stability and flexibility with regard to both size and required temperature coefficient of resistance. Its extremely low electromotive force vs copper together with its high electrical resistivity are highly desirable properties in a precision resistance wire. This datasheet provides information on composition, physical properties, and tensile properties. It also includes information on corrosion resistance as well as joining. Filing Code: Ni-373. Producer or source: Wilbur B. Driver Company.

HIPERCO 15

Alloy Digest ◽  
2002 ◽  
Vol 51 (10) ◽  
Keyword(s):  
Electrical Resistivity ◽  
Cobalt Content ◽  
Heat Treating ◽  
High Saturation Magnetization ◽  
Soft Magnetic ◽  
Magnetic Alloys ◽  
Soft Magnetic Alloys ◽  
High Electrical Resistivity ◽  
Technology Corporation ◽  
Carpenter Technology Corporation

Abstract Hiperco Alloy 15 is a development in soft magnetic alloys that combines the properties of high saturation, magnetization, high electrical resistivity, and lower cobalt content. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on forming and heat treating. Filing Code: FE-124. Producer or source: Carpenter Technology Corporation.

scholarly journals Characterization of a Shallow Coastal Aquifer in the Framework of a Subsurface Storage and Soil Aquifer Treatment Project Using Electrical Resistivity Tomography (Port de la Selva, Spain)

2021 ◽  
Vol 11 (6) ◽  
pp. 2448
Author(s):  
Alex Sendrós ◽  
Aritz Urruela ◽  
Mahjoub Himi ◽  
Carlos Alonso ◽  
Raúl Lovera ◽  
...  
Keyword(s):  
Electrical Resistivity ◽  
Water Reuse ◽  
Electrical Resistivity Tomography ◽  
Groundwater Modeling ◽  
Geophysical Methods ◽  
Soil Aquifer Treatment ◽  
Modeling Tools ◽  
Resistivity Tomography ◽  
Implicit Modeling ◽  
The Difference

Water percolation through infiltration ponds is creating significant synergies for the broad adoption of water reuse as an additional non-conventional water supply. Despite the apparent simplicity of the soil aquifer treatment (SAT) approaches, the complexity of site-specific hydrogeological conditions and the processes occurring at various scales require an exhaustive understanding of the system’s response. The non-saturated zone and underlying aquifers cannot be considered as a black box, nor accept its characterization from few boreholes not well distributed over the area to be investigated. Electrical resistivity tomography (ERT) is a non-invasive technology, highly responsive to geological heterogeneities that has demonstrated useful to provide the detailed subsurface information required for groundwater modeling. The relationships between the electrical resistivity of the alluvial sediments and the bedrock and the difference in salinity of groundwater highlight the potential of geophysical methods over other more costly subsurface exploration techniques. The results of our research show that ERT coupled with implicit modeling tools provides information that can significantly help to identify aquifer geometry and characterize the saltwater intrusion of shallow alluvial aquifers. The proposed approaches could improve the reliability of groundwater models and the commitment of stakeholders to the benefits of SAT procedures.

Electrical resistivity methods to characterize the moisture content in Brazilian sanitary landfill

2021 ◽  
Vol 193 (5) ◽  
Author(s):  
Nataly Aranda ◽  
Vagner R. Elis ◽  
Renato L. Prado ◽  
Miriam G. Miguel ◽  
Mariane Alves de Godoy Leme ◽  
...  
Keyword(s):  
Electrical Resistivity ◽  
Moisture Content ◽  
Sanitary Landfill
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