A comparison of experimental methods for describing shale pore features — A case study in the Bohai Bay Basin of eastern China

Li, Jijun; Yin, Jianxin; Zhang, Yanian; Lu, Shuangfang; Wang, Weiming; Li, Jinbu; Chen, Fangwen; Meng, Yuanlin

doi:10.1016/j.coal.2015.10.009

Cited by 162 publications

(80 citation statements)

References 33 publications

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“…The pore structure characterization methods can be divided into two categories: (1) Direct method. To directly observe and obtain image by means of optical microscope, transmission electron microscope (TEM), scanning electron microscope (SEM), and other micro zone observation technologies in order to get the size, shape and distribution of pores and other qualitative informations in shales (Chalmers et al, 2012;Curtis et al, 2012;Loucks et al, 2012;Gu et al, 2015;Klaver et al, 2015Klaver et al, , 2016Li et al, 2015b;Tang et al, 2016;; (2) Indirect method. Mainly by means of probe gas adsorption techniques to quantitatively characterize the pore size and pore structure, including neutron scattering, high pressure mercury intrusion, low pressure gas adsorption and so on (Mastalerz et al, 2012(Mastalerz et al, , 2013Clarkson et al, 2013;Cao et al, 2015;Hu et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Quantitative characterization of micropore structure for organic-rich Lower Silurian shale in the Upper Yangtze Platform, South China: Implications for shale gas adsorption capacity

Chen

Jiang

Liu

et al. 2017

Adv. Geo-Energ. Res.

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The pores in shales are mainly of nanometer-scale, and their pore size distribution is very important for shale gas storage and adsorption capacity, especially micropores having widths less than 2 nm, which contribute to the main occurrence space for gas adsorption. This study is focused on the organic-rich Lower Silurian black shale from four wells in the Upper Yangtze Platform, and their total organic carbon (TOC), mineralogical composition and micropore characterization were investigated. Low pressure CO2 adsorption measurement was conducted at 273.15 K in the relative pressure range of 0.0001-0.03, and the micropore structure was characterized by Dubinin-Radushkevich (DR) equation and density functional theory (DFT) method and then the relationship between micropore structure and shale gas adsorption capacity was discussed. The results indicated that (1) The Lower Silurian shale have high TOC content in the range of 0.92-4.96%, high quartz content in the range of 30.6-69.5%, and high clays content in the range of 24.1-51.2%. The TOC content shows a strong positive relationship with the quartz content which suggests that the quartz is mainly biogenic in origin. (2) The micropore volume varies from 0.12 cm 3 /100 g to 0.44 cm 3 /100 g and micropore surface area varies from 4.97 m 2 /g to 17.94 m 2 /g. Both of them increase with increasing TOC content, indicating TOC is the key factor to control the micropore structure of the Lower Silurian shale. (3) Low pressure CO2 adsorption measurement provides the most suitable detection range (0.3-1.5 nm) and has high reliability and accuracy for micropore structure characterization. (4) The TOC content is the key factor to control gas adsorption capacity of the Lower Silurian shale in the Upper Yangtze Platform.

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Section: Introductionmentioning

confidence: 99%

Quantitative characterization of micropore structure for organic-rich Lower Silurian shale in the Upper Yangtze Platform, South China: Implications for shale gas adsorption capacity

Chen

Jiang

Liu

et al. 2017

Adv. Geo-Energ. Res.

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“…The pores can exist both in the skeletons of clay minerals and in large deposits of mineral crystals (Desbois, Urai, & Kukla, ). The scanning electron microscopy results illustrate that many clastic particles (e.g., quartz and feldspar) with both regular and irregular shapes are packaged between the sheet and plate clay minerals of the mud shale samples; these clastic particles can form pores and combine with the surrounding clay minerals (Figure a; J. J. Li, Yin, et al, ; Takehiko, Osamu, & Toshiro, ; P. F. Wang et al, ; P. F. Zhang et al, ). The diameters of these pores are larger and can reach the micron scale.…”

Section: Resultsmentioning

confidence: 98%

“…OM pores are intrapores found within OM. The thermal maturation must reach an R o level of approximately 0.6% or higher before OM pores begin to develop (J. J. Li, Yin, et al, ; Robert, Robert, Stephen, & Ursula, ; P. F. Wang et al, ; M. Wang, Sherwood, et al, ; M. Wang, Wilkins, et al, ; P. F. Zhang et al, ), which, according to Dow (), is the beginning of peak oil generation. At levels of maturity less than 0.6% R o , OM pores are absent or extremely rare (Robert et al, ).…”

Section: Resultsmentioning

confidence: 99%

“…Although a certain amount of progress had been made, large‐scale industrial production of shale gas has not yet begun in China because of delays in development and the need to determine particular geological issues. Most of the shale in the USA is marine deposits, whereas the main type in the Eastern and Northwestern China is continental deposits (Gao et al, ; T. Hu, Pang, Wang, & Jiang, ; T. Hu, Pang, Yu, Wang, & Pang, ; T. Hu, Pang, Wang, et al, ; W. H. Li, ; J. J. Li, Wang, et al, ; J. J. Li, Yin, et al, ; M. Wang, Sherwood, et al, ; M. Wang, Wilkins, et al, ; W. Wang, Xue, Tian, Wilkins, & Wang, ). Therefore, large differences exist between the geological and geochemical characteristics of the shale in both countries, and it is not possible for China to completely copy the exploration experiences associated with shale gas in the USA.…”

Section: Introductionmentioning

confidence: 99%

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Geochemical and geological characteristics of the Jurassic continental black shale in the Southwestern Depression of Tarim Basin

Jiang

Liu

et al. 2018

Geological Journal

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Although Jurassic continental black shale within the Southwestern Depression of Tarim Basin (SDT) have received renewed attention during the past few years due to their potential to be prospected for shale gas, studies on shale characteristics remain rare. In this study, 31 black shale core samples were collected from a well (Buya‐1) drilled recently in the Hetian Sag of the southern SDT, and their geochemical, petrographical, mineralogical, petrophysical, and pore structural characteristics were determined through a series of tests. The results indicate that the black shale has high and variable total organic carbon (TOC) contents ranging between 0.1% and 17.0% (average 3.2%), is dominated by Type III kerogen (gas‐prone), and is in a mature to high‐mature stage. The shale is mainly composed of quartz, clay, and feldspar with mean contents of 40.0% (range = 15.0–72.0%), 51.0% (range = 25–77%), and 5.5% (range = 1–13.0%), respectively. The pore spaces are composed of primary pores, secondary pores, and microfractures. The mean sorbed gas content of the shale is approximately 2.4 m3/t, and the TOC is significantly positively and linearly correlated with the adsorbed gas capacity. The results show that the Jurassic continental shale in the SDT is very favourable for the formation of a large shale gas play, and the middle segment of the Jurassic shale is the most favourable target layer for shale gas exploration due to its greater gas generation capacity, higher mineralogical brittleness, larger gas storage space, and greater gas sorption capacity. This study is significant in guiding subsequent shale gas exploration and development in the Jurassic, SDT, and also is a reference for identifying favourable exploration targets of shale gas resource in other continental basins.

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“…In a there is a small bend, and the initial stage of adsorption, the adsorption showed that the adsorption line near the longitudinal axis, the initial stage, strong liquid nitrogen and diatomite adsorption capacity, adsorption speed. The relative pressure P/P0 between 0.2 and 0.8 diatomite adsorption desorption slope ratio increased significantly, the relative pressure of P/P0 is close to 1 times, showed no adsorption limit, and from the beginning to the end, the amount of adsorption of nitrogen modified diatomite increased significantly than that of modified diatomite raw diatomite, compared with the original diatom specific surface the area will be increased [11][12][13][14].…”

Section: Advances In Engineering Research Volume 94mentioning

confidence: 99%

Study on Adsorption of Cd2+ by Manganese Modified Diatomite

Xu¹,

Nanchun²,

Xie³

et al. 2017

Proceedings of the 2nd 2016 International Conference on Sustainable Development (ICSD 2016)

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Abstract-Diatomaceous earth itself has a large specific surface area, porous structured, large aperture and uniform, modest, stable skeleton structure of hole wall, easy to modify, high adsorption capacity, good thermal stability, mechanical stability and water, etc. Make it will benefit the adsorption of heavy metal ions, but single diatomite adsorbing heavy metal ions adsorption rate is not high, this article with manganese oxide modified diatomite, used for adsorption of Cd2+, with a series of characterization methods analyze adsorption principle..Provide a theoretical study for the adsorption of heavy metal ions principle

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A comparison of experimental methods for describing shale pore features — A case study in the Bohai Bay Basin of eastern China

Cited by 162 publications

References 33 publications

Quantitative characterization of micropore structure for organic-rich Lower Silurian shale in the Upper Yangtze Platform, South China: Implications for shale gas adsorption capacity

Quantitative characterization of micropore structure for organic-rich Lower Silurian shale in the Upper Yangtze Platform, South China: Implications for shale gas adsorption capacity

Geochemical and geological characteristics of the Jurassic continental black shale in the Southwestern Depression of Tarim Basin

Study on Adsorption of Cd2+ by Manganese Modified Diatomite

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