Rock porosity determination by combination of X-ray computerized tomography with mercury porosimetry

Klobes, P.; Riesemeier, H.; Meyer, Klas; Goebbels, J.; Hellmuth, Karl-Heinz

doi:10.1007/s002160050210

Cited by 57 publications

(27 citation statements)

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“…Using specific techniques that can observe the internal rock texture and structure, such us computed tomography (CT) (Klobes et al, 1997;Zang et al, 1998;Keller, 1998;Ohtani et al, 2001;Vervoort et al, 2003;Hirono et al, 2003;Ketcham, 2005;Crosta et al, 2010;Fusi and Martínez-Martínez, 2013).…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic and X-ray computed tomography characterization of progressive fracture damage in low-porous carbonate rocks

Martı́nez-Martı́nez

Fusi²,

Galiana-Merino

et al. 2016

Engineering Geology

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This paper studies the fracturing process in low-porous rocks during uniaxial compressive tests considering the original defects and the new mechanical cracks in the material. For this purpose, five different kind of rocks have been chosen with carbonate mineralogy and low porosity (lower than 2%). The characterization of the fracture damage is carried out using three different techniques: ultrasounds, mercury porosimetry and X-ray computed tomography. The proposed methodology allows quantifying the evolution of the porous system as well as studying the location of new cracks in the rock samples.Intercrystalline porosity (the smallest pores with pores radius < 1 µm) shows a limited development during loading, disappearing rapidly from the porosimetry curves and it is directly related to the initial plastic behaviour in the stress-strain patterns. However, the biggest pores (corresponding to the cracks) suffer a continuous enlargement until the unstable propagation of fractures. The measured crack initiation stress varies between 0.25· p and 0.50· p for marbles and between 0.50· p and 0.85· p for micrite limestone. The unstable propagation of cracks is assumed to occur very close to the peak strength. Crack propagation through the sample is completely independent of pre-existing defects (porous bands, stylolites, fractures and veins). A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT 2The ultrasonic response in the time-domain is less sensitive to the fracture damage than the frequency-domain. P-wave velocity increases during loading test until the beginning of the unstable crack propagation. This increase is higher for marbles (between 15% and 30% from initial vp values) and lower for micrite limestones (between 5% and 10%). When the mechanical cracks propagate unstably, the velocity stops to increase and decreases only when rock damage is very high. Frequency analysis of the ultrasonic signals shows clear changes during the loading process. The spectrum of treated waveforms shows two main frequency peaks centred at low ( 20 kHz) and high ( 35 kHz) values. When new fractures appear and grow the amplitude of the high-frequency peak decreases, while that of the low-frequency peak increases. Besides, a slight frequency shift is observed towards higher frequencies.

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Section: Introductionmentioning

confidence: 99%

Ultrasonic and X-ray computed tomography characterization of progressive fracture damage in low-porous carbonate rocks

Martı́nez-Martı́nez

Fusi²,

Galiana-Merino

et al. 2016

Engineering Geology

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“…The combination of mercury porosimetry and X-ray computerized tomography has been reported recently in the literature (11,12,21) and been used to determine mineral-specific porosity distributions, inhomogeneous penetration of the mercury and the nonuniform spatial variation of open porosity during sintering of ceramic green bodies. Due to the high density of mercury and, therefore, cross section of mercury for scattering X-rays and the pronounced hysteresis between MIP intrusion and extrusion curves of cement-based materials, mercury entrapment can be made visible by X-ray tomographic techniques (Fig.…”

Section: X-ray Tomographymentioning

confidence: 99%

Ink-Bottle Effect in Mercury Intrusion Porosimetry of Cement-Based Materials

Moro

Böhni

2002

Journal of Colloid and Interface Science

221

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“…In 1988 Withjack and Akervoll [4] between tomographic images of a core sample with and without a contrast-agent flood to determine porosity. Various contrast agents have since been used for analyzing porosity in a range of geomaterials [5][6][7] and a good review of the methods can be found in Akin and Kovscek [8]. A detailed quantitative analysis of the accuracy of this type of method using lab-based CT is given by Clausnitzer and Hopmans [9].…”

Section: Introductionmentioning

confidence: 98%

“…Contrast agents often used in lab-based CT for this purpose include potassium or sodium iodide [13,14] solutions and mercury [5,15].…”

Section: Introductionmentioning

confidence: 99%

Quantitative micro-porosity characterization using synchrotron micro-CT and xenon K-edge subtraction in sandstones, carbonates, shales and coal

Mayo

Josh

Nesterets

et al. 2015

Fuel

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Rock porosity determination by combination of X-ray computerized tomography with mercury porosimetry

Cited by 57 publications

References 1 publication

Ultrasonic and X-ray computed tomography characterization of progressive fracture damage in low-porous carbonate rocks

Ultrasonic and X-ray computed tomography characterization of progressive fracture damage in low-porous carbonate rocks

Ink-Bottle Effect in Mercury Intrusion Porosimetry of Cement-Based Materials

Quantitative micro-porosity characterization using synchrotron micro-CT and xenon K-edge subtraction in sandstones, carbonates, shales and coal

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