Description
The UEC Series consists of hydrostatic core holders integrated with acoustic sensors and electrodes, making them ideal for ultrasonic and resistivity studies involving fluid displacement in porous media. A key feature of these core holders is their ability to apply equal radial and axial confining pressures. The cell can be optionally equipped with a built-in hydraulic deviator chamber to apply an axial load on the specimen, enabling the application of distinct radial and axial confining pressures to generate deviatoric stress on the sample. The cell assembly includes specialized acoustic platens designed to facilitate the transmission of compressional (P) and shear (S1/S2) waves through rock specimens under controlled overburden pressure and temperature conditions. The cell is equipped with four electrodes designed for 2-point and 4-point electrical resistivity measurements. Two of these electrodes are in contact with the acoustic platens, which are electrically isolated from the rest of the system. The other two are circumferential electrodes embedded within the Viton electrical sleeve, positioned at the longitudinal midsection of the sleeve and spaced one inch apart. These coreholders are critical for understanding how fluid saturations, pressure, and temperature affect the mechanical (compressional and orthogonal shear wave velocities, dynamic elastic constants) and electrical properties of rocks, especially in applications like CO2 sequestration, hydrocarbon recovery, and reservoir characterization.
Specifications
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Standard
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ASTM (D2845)
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Maximum confining pressure
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70 MPa (10,000 psi)
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Maximum temperature | up to 120°C |
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Acoustic waves
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P, S1, S2
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Frequency
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1 MHz
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Resistivity
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2 and 4 points
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Sample diameter
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1 and 1.5 inches
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Sample length | Twice the length |
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Wetted part material
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Stainless steel / Hastelloy
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Loading
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Hydrostatic / Triaxial
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Pore inlet
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1
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Pore outlet
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1
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Port fittings | 1/8 inch
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Benefits
Tests performed on a series of rock specimens under different pressures and temperatures allow the user to determine:
* Compression and two orthogonal shear wave velocities
* Dynamic elastic constants
* Rock resistivities
Download Ultrasonic and electrical cell brochure.pdf