Characterization of tight gas reservoir pore structure using USANS/SANS and gas adsorption analysis

Clarkson, Christopher R.; Freeman, Melissa; He, Lilin; Agamalian, M.; Melnichenko, Yuri B.; Mastalerz, María; Bustin, R. Marc; Radliński, Andrzej P.; Blach, Tomasz

doi:10.1016/j.fuel.2011.12.010

Cited by 431 publications

(273 citation statements)

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“…83 While the supercritical Dubinin-Radushkevich equation produced good fits for CH 4 sorption in a previous study on Alum shale, Posidonia shale are more accurately described by the Langmuir equation. 8 In comparison to the Posidonia shales, the Alum shale has a larger proportion of ultra-microporosity (DR CO 2 ultramicropore volume of 12.9 and CO 2 sorption pore volume of 16.8 mm 3 g -1 ). 14 The DR model is based on micropore filling and, thus, it produced good results on ultra microporous shales.…”

Section: Enthalpy Of Adsorption Of Shalesmentioning

confidence: 98%

“…MICP bulk volumes/densities of shale were calculated from the bulk volume of the known mass of sample placed into the MICP equipment and the grain density of the sample measured by the small pycnometer method. Pore volumes, measured 8 by injected mercury, (MICP pv ) were calculated from the difference of the volume of mercury injected at 1.379 MPa and 268.9 MPa, assuming that the small amounts of mercury injected at the lower pressure, only fill surface topography and micro fractures. The macro porosity (1093 -50 nm) present in some samples, which could act as methane gas storage capacity was included in the total pore volume, but surface topography and micro fractures related to the de-stressing and drying of geological samples were excluded (see Table 1).…”

Section: Mercury Injection Capillary Pressure Porosimetrymentioning

confidence: 99%

“…Within the phyllosilicates group, illiterich mixed layer illite-smectite is the most prominent component, followed by kaolinite, illite, muscovite and chlorite. In addition, there is a moderate content of quartz (8)(9)(10)(11)(12)(13)(14)(15)(16) wt.%) and minor contents of pyrite (4-9 wt.%), feldspars (1-5 wt.%) and dolomite (0.3-6.4 wt.%).…”

Section: Mineralogymentioning

confidence: 99%

“…Ultra small angle neutron scattering and small angle neutron scattering techniques are also useful for the determination of pore connectivity in shales. [8][9][10] Sorbed gas in shale is in equilibrium with the homogeneous bulk gas phase ("free gas") in larger pores. Sorption capacity depends on pressure and temperature, and structural characteristics, such as (micro-) pore volume and organic matter type, maturity and content.…”

Section: Introductionmentioning

confidence: 99%

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High-Pressure Methane Adsorption and Characterization of Pores in Posidonia Shales and Isolated Kerogens

et al. 2014

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. (2014) 'High-pressure methane adsorption and characterization of pores in Posidonia shales and isolated kerogens.', Energy fuels., 28 (5). pp. 2886-2901. Further information on publisher's website:http://dx.doi.org/10.1021/ef402466mPublisher's copyright statement:This document is the Accepted Manuscript version of a Published Work that appeared in nal form in Energy Fuels, copyright c American Chemical Society after peer review and technical editing by the publisher. To access the nal edited and published work see http://dx.doi.org/10.1021/ef402466m. Additional information:Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. AbstractSorption capacities and pore characteristics of bulk shales and isolated kerogens have been determined for immature, oil-window and gas-window mature samples from the Lower Toarcian Posidonia Shale formation. Dubinin-Radushkevich (DR) micropore volumes, sorption pore volumes and surface areas of shales and kerogens were determined from CO 2 adsorption isotherms at -78°C and 0°C, and N 2 adsorption isotherms at -196°C. Mercury injection capillary pressure porosimetry, grain density measurements and helium pycnometry were used to determine shale and kerogen densities and total pore volumes.Total porosities decrease through the oil-window and then increase into the gas-window.High-pressure methane isotherms up to 14 MPa were determined at 45, 65 and 85°C on dry shale and at 45 and 65°C on kerogen. Methane excess uptakes at 65°C and 11.5 MPa were in the range 0.056-0.110 mmol g -1 (40-78 scf t -1 ) for dry Posidonia shales and 0.36-0.70 mmol g -1 (253-499 scf t -1 ) for the corresponding dry kerogens. Absolute methane isotherms were calculated by correcting for the gas at bulk gas phase density in the sorption pore volume. The enthalpies of CH 4 adsorption for shales and kerogens at zero surface coverage showed no significant variation with maturity, indicating that the sorption pore volume is the primary control on sorption uptake. The sum of pore volumes measured by a) CO 2 sorption at -78°C and b) mercury injection, are similar to the total porosity for shales. Since mercury in our experiments occupies pores with constrictions larger than ca. 6 nm, we infer that porosity measured by CO 2 adsorption at -78°C in the samples used in this study is largely within pores with effective diameters smaller than 6 nm. The linear correlation between maximum CH 4 surface excess sorption and CO 2 sorption pore volume at -78°C is very strong for both shales and kerogens, and goes through the origin, suggestin...

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Section: Enthalpy Of Adsorption Of Shalesmentioning

confidence: 98%

Section: Mercury Injection Capillary Pressure Porosimetrymentioning

confidence: 99%

Section: Mineralogymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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High-Pressure Methane Adsorption and Characterization of Pores in Posidonia Shales and Isolated Kerogens

et al. 2014

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“…Elucidating the complex pore networks in gas shales has become a strategic subject because many studies have shown that shale pore structure is one of the most important factors controlling gas capacity [1][2][3][4][10][11][12]. Several measurement techniques have successfully been developed to characterize the complex pore systems such as small-angle and ultra small angle neutron scattering (SANS/ USANS), low-pressure gas adsorption, mercury injection capillary pressure (MICP), and scanning electron microscopy (SEM) [5,[13][14][15][16][17]. The geological controls of pore structure in gas shales include the total organic carbon (TOC) content, thermal maturity and mineralogy, which have preliminarily been discussed in previous works [3,4,10,18,19].…”

Section: Introductionmentioning

confidence: 99%