BIB-SEM study of the pore space morphology in early mature Posidonia Shale from the Hils area, Germany

Klaver, Jop; Desbois, Guillaume; Urai, János L.; Littke, Ralf

doi:10.1016/j.coal.2012.06.012

Cited by 384 publications

(272 citation statements)

References 43 publications

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“…FIB and BIB), which allow imaging of mineral fabrics and porosity down to the nanometre scale in very high-quality cross sections with SEM and TEM (Lee et al, 2003;Desbois et al, 2009Desbois et al, , 2011Desbois et al, , 2013Desbois et al, , 2016Loucks et al, 2009;Curtis et al, 2010;Heath et al, 2011;Klaver et al, 2012;Keller et al, 2011Keller et al, , 2013Houben et al, 2013Houben et al, , 2014Hemes et al, 2013Hemes et al, , 2015Laurich et al, 2014;Warr et al, 2014;Song et al, 2016). Serial sectioning allows the reconstruction of microstructure in 3-D (Keller et al, 2011(Keller et al, , 2013Milliken et al, 2013;Hemes et al, 2015), and cryogenic techniques can image the pore fluid in the samples and avoid artefacts produced by drying Schmatz et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Deformation in cemented mudrock (Callovo–Oxfordian Clay) by microcracking, granular flow and phyllosilicate plasticity: insights from triaxial deformation, broad ion beam polishing and scanning electron microscopy

Desbois¹,

Höhne²,

Urai³

et al. 2017

Solid Earth

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Abstract. The macroscopic description of deformation and fluid flow in mudrocks can be improved by a better understanding of microphysical deformation mechanisms. Here we use a combination of scanning electron microscopy (SEM) and broad ion beam (BIB) polishing to study the evolution of microstructure in samples of triaxially deformed Callovo-Oxfordian Clay. Digital image correlation (DIC) was used to measure strain field in the samples and as a guide to select regions of interest in the sample for BIB-SEM analysis. Microstructures show evidence for dominantly cataclastic and minor crystal plastic mechanisms (intergranular, transgranular, intragranular cracking, grain rotation, clay particle bending) down to the nanometre scale. At low strain, the dilatant fabric contains individually recognisable open fractures, while at high strain the reworked clay gouge also contains broken non-clay grains and smaller pores than the undeformed material, resealing the initial fracture porosity.

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Section: Introductionmentioning

confidence: 99%

Deformation in cemented mudrock (Callovo–Oxfordian Clay) by microcracking, granular flow and phyllosilicate plasticity: insights from triaxial deformation, broad ion beam polishing and scanning electron microscopy

Desbois¹,

Höhne²,

Urai³

et al. 2017

Solid Earth

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“…Therefore, for image analysis procedures on slate samples, sample preparation like ion polishing techniques, either on 2D thin sections or on cross sections of sub-samples are necessary (e.g. Hemes et al, 2013;, Keller et al, 2013Klaver et al, 2012Klaver et al, , 2015. 30…”

Section: Contribution To Porosity Estimatesmentioning

confidence: 99%

“…Both overview image mosaics with a magnification of 125x and 1250x and high magnification (up to 20 kx) are acquired. For testing the Representative Element Area (REA) the box counting method is used (Kameda et al, 2006;Klaver et al, 2012). Hereby, we applied a stepwise growing box to the segmented pore images in which the total area% of pores within the box is measured.…”

Section: Microstructure Imagingmentioning

confidence: 99%

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Multiscale porosity estimates along the pro-and retrograde deformation path: an example from Alpine slates

Akker¹,

Kaufmann²,

Desbois³

et al. 2018

Preprint

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Abstract. Estimating porosity of slates is of great interest for the recently rising industries dealing with the underground such as CO2 sequestration, nuclear waste disposal and shale gas but also for engineering purposes in 15 terms of mechanical stability for underground or surface constructions. In this study, we aim understanding Additionally, porosity and pore morphology are strongly dependent on mineralogy, sample homogeneity and 30 strain.

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“…X-ray diffraction (XRD) analysis was performed on 30 g of powdered shale sample (smaller than 58 lm) with an X-ray diffractometer (Rigaku D/max-IIIA, Japan) (Wang et al 2009). A scanning electron microscope (Hitachi, S-4800) was used to observe the microstructure of the fresh appearance of several fragments (Klaver et al 2012). …”

Section: Fabric Analysismentioning

confidence: 99%

Development and evaluation of an electropositive wellbore stabilizer with flexible adaptability for drilling strongly hydratable shales

et al. 2015

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In order to overcome serious instability problems in hydratable shale formations, a novel electropositive wellbore stabilizer (EPWS) was prepared by a new approach. It has good colloidal stability, particle size distribution, compatibility, sealing property, and flexible adaptability. A variety of methods including measurements of particle size, Zeta potential, colloidal stability, contact angle, shale stability index, shale dispersion, shale swelling, and plugging experiments were adopted to characterize the EPWS and evaluate its anti-sloughing capacity and flexible adaptability. Results show that the EPWS has advantages over the conventional wellbore stabilizer (ZX-3) in particle size distribution, colloidal stability, inhibition, compatibility, and flexible adaptability. The EPWS with an average particle size of 507 nm and an average Zeta potential of 54 mV could be stable for 147 days and be compatible with salt tolerant or positive charged additives, and it also exhibited preferable anti-sloughing performance to hydratable shales at 77, 100, and 120°C, and better compatibility with sodium bentonite than ZX-3 and KCl. The EPWS can plug micro-fractures and pores by forming a tight external mud cake and an internal sealing belt to retard pressure transmission and prevent filtrate invasion, enhancing hydrophobicity of shale surfaces by adsorption to inhibit hydration. The EPWS with flexible adaptability to temperature for inhibition and sealing capacity is available for long open-hole sections during drilling.

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BIB-SEM study of the pore space morphology in early mature Posidonia Shale from the Hils area, Germany

Cited by 384 publications

References 43 publications

Deformation in cemented mudrock (Callovo–Oxfordian Clay) by microcracking, granular flow and phyllosilicate plasticity: insights from triaxial deformation, broad ion beam polishing and scanning electron microscopy

Deformation in cemented mudrock (Callovo–Oxfordian Clay) by microcracking, granular flow and phyllosilicate plasticity: insights from triaxial deformation, broad ion beam polishing and scanning electron microscopy

Multiscale porosity estimates along the pro-and retrograde deformation path: an example from Alpine slates

Development and evaluation of an electropositive wellbore stabilizer with flexible adaptability for drilling strongly hydratable shales

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