2020
DOI: 10.1201/9780367812614
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Standard Methods of GEOPHYSICAL FORMATION EVALUATION

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Cited by 3 publications
(2 citation statements)
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“…Electromagnetic geophysical methods detect variations in the electrical properties of rocks, in particular electrical resistivity or its inverse, electrical conductivity. In the upper crust, the electrical resistivity of geologic units largely depends on their fluid content, porosity, fracture density, temperature, and state of alteration, as well as the presence of conductive minerals, such as clay, graphitic carbon, and metallic minerals (e.g., Keller and Frischknecht, 1966;Hearst and Nelson, 1985;Keller, 1987;Palacky, 1987;Nelson and Anderson, 1992;Hallenburg, 1998;Hearst et al, 2000). Fresh-water-saturated, unconsolidated, terrestrial, alluvial sediments are commonly conductive to moderately conductive (2-70 ohm-m).…”
Section: Magnetotelluric Data and Methodsmentioning
confidence: 99%
“…Electromagnetic geophysical methods detect variations in the electrical properties of rocks, in particular electrical resistivity or its inverse, electrical conductivity. In the upper crust, the electrical resistivity of geologic units largely depends on their fluid content, porosity, fracture density, temperature, and state of alteration, as well as the presence of conductive minerals, such as clay, graphitic carbon, and metallic minerals (e.g., Keller and Frischknecht, 1966;Hearst and Nelson, 1985;Keller, 1987;Palacky, 1987;Nelson and Anderson, 1992;Hallenburg, 1998;Hearst et al, 2000). Fresh-water-saturated, unconsolidated, terrestrial, alluvial sediments are commonly conductive to moderately conductive (2-70 ohm-m).…”
Section: Magnetotelluric Data and Methodsmentioning
confidence: 99%
“…The invasion occurs through the continuous phase, known as mud filtrate (liquid), while discontinuous material (added clays and/ or polymers) cannot penetrate the pores and create a mud cake in the borehole wall. 4 Mud filtrate invasion changes the physicochemical properties of the formation, and it is necessary to know the physical properties of the mud filtrate to extract its effect from geophysical logs. When the mud filtrate behavior is known, it is possible to predict the response of logging tools near the borehole wall (flushed zone).…”
Section: Introductionmentioning
confidence: 99%