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Rock/water interaction in dielectric properties: Experiments with hydrophobic sandstones
1995
Geophysics
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In three hydrophobic samples the rock/water interaction, seen in the data for the water-wet samples, is eliminated and the dielectric constant of the partially saturated sandstones can be simply modeled ...
Experimental data indicate that rock/water interaction, at low saturations, has a large effect on the measured dielectric response. ...
The authors greatly appreciate the assistance of Paulette Tercier in the laboratory and Ray Rodway in the machine shop. ...
doi:10.1190/1.1443780
fatcat:2wo2rsaxznh43gy35k2ratjj7y
AN IMPROVISED NON-INVASIVE METHOD WITH CLUTTER REMOVAL FOR DIELECTRIC CHARACTERIZATION OF TERRESTRIAL ROCK SAMPLES AT S-BAND FREQUENCY
2021
Progress In Electromagnetics Research C
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This paper presents a free-space reflection measurement technique for estimating dielectric constant and loss tangent of different materials, demonstrated for rock samples, at S-band. ...
The estimation of dielectric properties of rock samples will be used to validate algorithms for science studies using SAR data of Chandrayaan-2 and other planetary missions. ...
The authors are also thankful to Shri Tathagata Chakraborty, Geologist at SAC, responsible for groundtruth rock samples collection and his valuable insights regarding the samples under study. ...
doi:10.2528/pierc21021004
fatcat:5632dgvpgrgo3fxtucrjpmjary
A new concept in modeling the dielectric response of sandstones: Defining a wetted rock and bulk water system
1990
Geophysics
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Each sample was fully water saturated
dielectric response of dp rock and water to predict the with deionized water then dried with dielectric measure-
dielectric response of ...
dielectric response of the rock wetted by, or in equilibrium
It has been clearly shown experimentally that the geome- with, the water.
try of components in a porous rock containing ...
doi:10.1190/1.1442870
fatcat:k67rqbaocrelbp2r24enbe2jz4
Measurement of the complex permittivity of dry rocks and minerals: application of polythene dilution method and Lichtenecker's mixture formulae
2005
Geophysical Journal International
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Moreover, the complex permittivity of rocks and minerals measured by this method is more reliable than the direct dielectric measurement of rocks or minerals without application of the polythene dilution ...
However, the traditional RCP method is sensitive to the measurement of low dielectric constant (ε ) and low loss factor (ε or tan δ) materials. ...
of Sciences, and Professor Yangting Lin with the Insitute of Geology and Geophysics, Chinese Academy of Sciences. ...
doi:10.1111/j.1365-246x.2005.02718.x
fatcat:zxd2eyyrdbholmbzodwv55nbsu
Dielectric constant as a predictor of porosity in dry volcanic rocks
1999
Journal of Volcanology and Geothermal Research
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Measurements of dielectric constant K are made on 34 samples of volcanic rocks at frequencies of 0.01 to 10 MHz Ž . Ž . Ž . under ambient atmospheric conditions. ...
Samples of basalt show greater variance in measured values of K X , due perhaps to higher and more variable modes of Fe-Ti oxide minerals. ...
NSERC Research Grant aOGP0820 JKR and an Ž . NSERC PGS A award ACR . The manuscript was improved by critical reviews provided by Bruce Marsh and two anonymous reviewers. ...
doi:10.1016/s0377-0273(99)00055-4
fatcat:x2ltfbnfnneq5imhhhdwuq73la
DIELECTRIC SPECTROSCOPY IN CRUSTAL ROCKS: PRELIMINARY RESULTS FROM NORTHEASTERN SICILY (ITALY) AND THE GULF OF CORINTH (GREECE)
2004
Bulletin of the Geological Society of Greece
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Dielectric response was studied on two samples of manganese- and iron bearing rock materials of two different geological origins, one from Northeastern Sicily (Italy) and one from the Southern Gulf of ...
The technique is based on the application of a single- frequency AC electric field to the sample and the measurement of the amplitude and phase of its response. ...
The basic parameters of dielectric relaxation are the s s and ε^ low and highfrequency limits of relative permittivity, respectively, and the relaxation intensity s a -ε«, (or the re laxation magnitude ...
doi:10.12681/bgsg.16677
fatcat:7z4rzjpxpbc3jlpz553l5laiju
Experimental Research on Electrical Parameters Variation of Loaded Coal
2011
Procedia Engineering
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The results show that electrical parameters' change curves of the loaded raw coal samples and briquette have a very good consistency; the consistency of dielectric constant curve and coal stress -strain ...
Compared to the initial electrical parameter values of the coal samples, the electrical parameter change rate of raw coal samples and briquette are generally higher than 13%, up to 165%, the electrical ...
Studies have shown that resistivity and dielectric constant are the main electrical parameters of underground coal rock, resistivity and dielectric constant of deformed soft coal and primary structure ...
doi:10.1016/j.proeng.2011.11.2252
fatcat:2346kuohlvce3cjzcf4my3cqz4
Estimation of Water Saturation in Shale Formation Using In Situ Multifrequency Dielectric Permittivity
2022
Geofluids
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The key goal of this research is to propose a workflow to evaluate an equivalent Archie's parameter which can generate the same dielectric logging tool responses with core measurement results using a given ...
The estimated Archie's parameter from the SMD model is sensitive to the lower frequency channels of the multifrequency dielectric logging tool. ...
Numerous lab measurements have been done to define the permittivity of rock samples. For example, Zinszner and Pellerin [11] made electrical measurements in sandstone and limestone. ...
doi:10.1155/2022/9491979
fatcat:hmdnfmpnzjh5bbpksqgdrmcpgm
Characterization of Rock Wettability Though Dielectric Measurements
1998
Revue de l Institut Français du Pétrole
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CHARACTERIZATION OF ROCK WETTABILITY THROUGH DIELECTRIC MEASUREMENTS The wettability of glass filters and Berea sandstone was investigated using the electric response in the interval 10 2 -10 8 Hz. ...
The dispersivity and the loss tangent were found to be the most suitable parameters to check the wettability of the samples. ...
The electric impedance and dielectric constant of all the samples were then measured. ...
doi:10.2516/ogst:1998068
fatcat:kpmfooqmibcuvfpmnhrvzitfma
Dielectric relaxation behavior of Callovo-Oxfordian clay rock: A hydraulic-mechanical-electromagnetic coupling approach
2013
Journal of Geophysical Research - Solid Earth
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For this purpose, undisturbed and disturbed clay rock samples were conditioned to achieve a water saturation range from 0.16 to nearly saturation. ...
High-frequency electromagnetic (HF-EM) measurement techniques, i.e., time or frequency domain reflectometry, offer useful tools for quantitative estimation of water content in porous media. ...
He was in charge of all the samples preparation and the characterization. Moreover, the authors gratefully acknowledge the German Research Foundation (DFG) for support of the project WA 2112/2. ...
doi:10.1002/jgrb.50343
fatcat:vmwqdn4zubfhdp2gvgna5ettc4
Dielectric Constant Properties of Tight Sandstone
2017
International Journal of Petrochemical Science & Engineering
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Two parameters, resistivity and permittivity or dielectricity, were investigated with tight sandstone cores. ...
Hence, the dielectric property is much significant characteristics should be investigated in order to better understand the electric mechanism of tight rocks. ...
(G12-3) of the State Key Lab of Oil and Gas Reservoir Geology and Exploitation of SWPU. ...
doi:10.15406/ipcse.2016.02.00027
fatcat:6pmwn6iagffafenxsb7ayrhr34
Dielectric Constant Properties of Tight Sandstone
2017
International Journal of Petrochemical Science & Engineering
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Two parameters, resistivity and permittivity or dielectricity, were investigated with tight sandstone cores. ...
Hence, the dielectric property is much significant characteristics should be investigated in order to better understand the electric mechanism of tight rocks. ...
(G12-3) of the State Key Lab of Oil and Gas Reservoir Geology and Exploitation of SWPU. ...
doi:10.15406/ipcse.2017.02.00027
fatcat:hkwjq5vzazcnhjo2iywklwhqse
Reflectance, dielectric constant and chemical content of selected sedimentary rocks
2002
International Journal of Remote Sensing
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of 34 sedimentary rock samples were measured. ...
The average real part of the dielectric constant is highly correlated with the weight loss of the rocks due to burning (burnt loss) (r=0.92), SiO 2 (r= 0.96), and CaO (r=0.91). ...
Gong) by NSF of China (49825511). ...
doi:10.1080/01431160210153976
fatcat:oaubixg3fvdrflpacsdrvsejfu
Electro-physical Properties of Super-thin Basalt Fiber Chemically Modified by Hydrochloric or Sulphuric Acid
2011
Journal of Modern Physics
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Specific electric resistance for direct ρ dc and alternating ρ ac currents, dielectric parameters of ε' and ε" were measured. ...
It is shown that specific resistance and dielectric parameters of super-thin basalt fiber change essentially after hydrochloric or sulphuric acid treatment. ...
Acknowledgements This work was supported by International Science and Technology Center (ISTC) Project No. A-1605. The authors are grateful for this assistance.
References ...
doi:10.4236/jmp.2011.212179
fatcat:3agkm5xvtrdrzcwiehbrk2pz7q
Macroscopic dielectric constant for microstructures of sedimentary rocks
2000
Granular Matter
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An approximate method to calculate dielectric response and relaxation functions for water saturated sedimentary rocks is tested for realistic three-dimensional pore space images. ...
The approximate method is based on image analysis and local porosity theory. An empirical rule for the specification of the length scale in local porosity theory is advanced. ...
These parameters determine which information about the microstructure can be obtained from measurements of the effective dielectric constant. ...
doi:10.1007/s100359900035
fatcat:2n4lv2k73jg7bdblzpnd76mnwy
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