Characterization of gas shale pore systems by porosimetry, pycnometry, surface area, and field emission scanning electron microscopy/transmission electron microscopy image analyses: Examples from the Barnett, Woodford, Haynesville, Marcellus, and Doig units

Chalmers, Gareth R.L.; Bustin, R. Marc; Power, Ian M.

doi:10.1306/10171111052

Cited by 1,237 publications

(802 citation statements)

References 31 publications

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“…At this salt concentration there is a smaller density difference between the carbon dioxide solution and the pure brine solution [35] and consequently the Rayleigh number is relatively low. The experiment starts after admitting carbon dioxide into the cell at the required pressure.…”

Section: Resultsmentioning

confidence: 96%

“…As the light beam, which traverses in the x-direction, encounters many gravity fingers it will be deflected in all directions and shows more a typical scattering pattern and the lower half, beyond the dark region, shows an increased intensity [35][36][37][38][39] . So even if the beam is deflected downwards the scattered light goes around the focal point and we expect a lighter region.…”

Section: Experimental Results and Interpretationmentioning

confidence: 99%

“…A shale gas reservoir is a fine grained shale with organic content [34]. Criteria that are important in characterizing shale gas hydrocarbon potential include: permeability, Total Organic Carbon (TOC) content, thermal maturity of the organic matter and the type of hydrocarbons available in the reservoir [35][36][37][38][39].…”

Section: Types Of Gas Shalesmentioning

confidence: 99%

“…Concerns about rising concentrations of CO2 in the atmosphere have led to many experimental [16,[21][22][23][24][25] and numerical studies [26][27][28][29][30][31][32] aimed to store anthropogenic CO2 in the geological formations [33][34][35]. Methods proposed to reduce CO 2 emission include its storage in saline aquifers, depleted gas and oil reservoirs or unminable coal seams [14,21,36,37].…”

Section: Introductionmentioning

confidence: 99%

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Mechanisms for CO2 Sequestration in Geological Formations and Enhanced Gas Recovery

Khosrokhavar¹

2016

Springer Theses

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Section: Resultsmentioning

confidence: 96%

Section: Experimental Results and Interpretationmentioning

confidence: 99%

Section: Types Of Gas Shalesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Mechanisms for CO2 Sequestration in Geological Formations and Enhanced Gas Recovery

Khosrokhavar¹

2016

Springer Theses

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“…Porosity data from the North America shale and the Lower Paleozoic shale of the southern area of the Sichuan Basin show an obvious decrease when R o or EqR o is over 3.0 % (Wang et al 2013a), implying that this relationship indeed exists in natural shale systems. Figure 3 further shows that shale porosity varies widely from 3 % to 6 % when R o or EqR o value is between 1.0 % and 3.0 %, without a clear relationship with maturity, which reflects the combined effect of multiple factors (except for maturity), such as TOC content and mineral compositions on shale porosity (Curtis et al 2010;Chalmers and Bustin 2008;Chalmers et al 2012;Ross and Bustin 2009). When R o or EqR o is between 3 % and 5 %, shale porosity varies within a narrow range, mainly between 2 % and 4 %, having an obvious decreasing trend with increasing maturity.…”

Section: Geological Characteristics Of the Lower Paleozoic Shalementioning

confidence: 98%

Main controlling factors and enrichment area evaluation of shale gas of the Lower Paleozoic marine strata in south China

et al. 2015

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The Lower Paleozoic shale in south China has a very high maturity and experienced strong tectonic deformation. This character is quite different from the North America shale and has inhibited the shale gas evaluation and exploration in this area. The present paper reports a comprehensive investigation of maturity, reservoir properties, fluid pressure, gas content, preservation conditions, and other relevant aspects of the Lower Paleozoic shale from the Sichuan Basin and its surrounding areas. It is found that within the main maturity range (2.5 % \ EqR o \ 3.5 %) of the shale, its porosity develops well, having a positive correlation with the TOC content, and its gas content is controlled mainly by the preservation conditions related to the tectonic deformation, but shale with a super high maturity (EqR o [ 3.5 %) is considered a high risk for shale gas exploration. Taking the southern area of the Sichuan Basin and the southeastern area of Chongqing as examples of uplifted/folded and faulted/folded areas, respectively, geological models of shale gas content and loss were proposed. For the uplifted/folded area with a simple tectonic deformation, the shale system (with a depth [ 2000 m) has largely retained overpressure during uplifting without a great loss of gas, and an industrial shale gas potential is generally possible. However, for the faulted/folded area with a strong tectonic deformation, the sealing condition of the shale system was usually destroyed to a certain degree with a great loss of free gas, which decreased the pressure coefficient and resulted in a low production capacity. It is predicted that the deeply buried shale ([3000 m) has a greater gas potential and will become the focus for further exploration and development in most of the south China region (outside the Sichuan Basin).

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Multiscale pore structure and its effect on gas transport in organic‐rich shale

Zhao

et al. 2017

Water Resources Research

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A systematic investigation of multiscale pore structure in organic‐rich shale by means of the combination of various imaging techniques is presented, including the state‐of‐the‐art Helium‐Ion‐Microscope (HIM). The study achieves insight into the major features at each scale and suggests the affordable techniques for specific objectives from the aspects of resolution, dimension, and cost. The pores, which appear to be isolated, are connected by smaller pores resolved by higher‐resolution imaging. This observation provides valuable information, from the microscopic perspective of pore structure, for understanding how gas accumulates and transports from where it is generated. A comprehensive workflow is proposed based on the characteristics acquired from the multiscale pore structure analysis to simulate the gas transport process. The simulations are completed with three levels: the microscopic mechanisms should be taken into consideration at level I; the spatial distribution features of organic matter, inorganic matter, and macropores constitute the major issue at level II; and the microfracture orientation and topological structure are dominant factors at level III. The results of apparent permeability from simulations agree well with the values acquired from experiments. By means of the workflow, the impact of various gas transport mechanisms at different scales can be investigated more individually and precisely than conventional experiments.

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Characterization of gas shale pore systems by porosimetry, pycnometry, surface area, and field emission scanning electron microscopy/transmission electron microscopy image analyses: Examples from the Barnett, Woodford, Haynesville, Marcellus, and Doig units

Cited by 1,237 publications

References 31 publications

Mechanisms for CO2 Sequestration in Geological Formations and Enhanced Gas Recovery

Mechanisms for CO2 Sequestration in Geological Formations and Enhanced Gas Recovery

Main controlling factors and enrichment area evaluation of shale gas of the Lower Paleozoic marine strata in south China

Multiscale pore structure and its effect on gas transport in organic‐rich shale

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