Microstructural characterisation of organic matter pores in coal-measure shale

Li, Kunjie; Kong, Shuying; Xia, Ping; Wang, Xiaoling

doi:10.46690/ager.2020.04.04

Cited by 47 publications

(22 citation statements)

References 33 publications

(61 reference statements)

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“…This method has been used for shale pore structure analysis. To obtain a description of the external surface area and to calculate the micropore volume of materials that are mainly formed by micropores, the method known as the deBoer t-plot [67,143] appears to be an acceptable option and has been used in shales [123,144]. Finally, Rouquerol et al, 2014 [58]).…”

Section: Other Methodsmentioning

confidence: 99%

Section: Other Methodsmentioning

confidence: 99%

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Use of Gas Adsorption and Inversion Methods for Shale Pore Structure Characterization

Medina-Rodriguez

Alvarado

2021

Energies

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The analysis of porosity and pore structure of shale rocks has received special attention in the last decades as unconventional reservoir hydrocarbons have become a larger parcel of the oil and gas market. A variety of techniques are available to provide a satisfactory description of these porous media. Some techniques are based on saturating the porous rock with a fluid to probe the pore structure. In this sense, gases have played an important role in porosity and pore structure characterization, particularly for the analysis of pore size and shapes and storage or intake capacity. In this review, we discuss the use of various gases, with emphasis on N2 and CO2, for characterization of shale pore architecture. We describe the state of the art on the related inversion methods for processing the corresponding isotherms and the procedure to obtain surface area and pore-size distribution. The state of the art is based on the collation of publications in the last 10 years. Limitations of the gas adsorption technique and the associated inversion methods as well as the most suitable scenario for its application are presented in this review. Finally, we discuss the future of gas adsorption for shale characterization, which we believe will rely on hybridization with other techniques to overcome some of the limitations.

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Section: Other Methodsmentioning

confidence: 99%

Section: Other Methodsmentioning

confidence: 99%

Use of Gas Adsorption and Inversion Methods for Shale Pore Structure Characterization

Medina-Rodriguez

Alvarado

2021

Energies

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show abstract

“…Many advanced technologies have been applied in shale pore structure characterization [9][10][11], such as imaging method (scanning electron microscopy, micro-nano CT, atomic force microscopy, etc. ), nuclear magnetic resonance, gas physisorption, and high pressure mercury intrusion porosimetry (HPMIP) [7,[12][13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Effect of Shale Sample Particle Size on Pore Structure Obtained from High Pressure Mercury Intrusion Porosimetry

Gao

Duan

et al. 2021

Geofluids

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With the rapid development of unconventional oil and gas, the pore structure characterization of shale reservoirs has attracted an increasing attention. High pressure mercury intrusion porosimetry (HPMIP) has been widely used to quantitatively characterize the pore structure of tight shales. However, the pore structure obtained from HPMIP could be significantly affected by the sample particle size used for the analyses. This study mainly investigates the influence of shale sample particle size on the pore structure obtained from HPMIP, using Mississippian-aged Barnett Shale samples. The results show that the porosity of Barnett Shale samples with different particle sizes obtained from HPMIP has an exponentially increasing relation with the particle size, which is mainly caused by the new pores or fractures created during shale crushing process as well as the increasing exposure of blind or closed pores. The amount and proportion of mercury retention during mercury extrusion process increase with the decrease of shale particle size, which is closely related to the increased ink-bottle effect in shale sample with smaller particle size. In addition, the fractal dimension of Barnett Shale is positively related to the particle size, which indicates that the heterogeneity of pore structure is stronger in shale sample with larger particle size. Furthermore, the skeletal density of shale sample increases with the decrease of particle size, which is possibly caused by the differentiation of mineral composition during shale crushing process.

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“…In recently published studies, many scholars have studied the pore network structure and seepage properties of rocks at the microscale [9][10][11][12]. Advances in CT and scanning electron microscopy (SEM) have enabled the application of the rock digital core.…”

Section: Introductionmentioning

confidence: 99%

Quantitative Analysis of the Topological Structure of Rock Pore Network

Liu

Luo

et al. 2021

Geofluids

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As the most significant nonlinear reservoir, the rocks have complex structural characteristic. The pore structure of the rock is varied in shape and complex in connectivity. However, the prevailing methods for characterising the microstructure of rocks, such as the coordination number method and fractal theory, are still difficult to quantify the structural properties. In this study, based on the CT-scan method and a new complex network theory, the topological characteristics of rocks such as seepage path selection, degree of pore aggregation, pore importance, and pore module structure are analysed. The results show that the scale-free network model is more reliable in characterising the rock pore network than previously published structural models, and a small number of pores are the “key” to the seepage process. Besides, we proposed a new method to quantify the importance of rock pores and present the distribution characteristics and connectivity laws of the rock-pore network. This provides a new method to study the seepage process of the nonlinear reservoirs.

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Microstructural characterisation of organic matter pores in coal-measure shale

Abstract: Microstructural characterisation of organic matter pores in coal-measure shale.

Cited by 47 publications

References 33 publications

Use of Gas Adsorption and Inversion Methods for Shale Pore Structure Characterization

Use of Gas Adsorption and Inversion Methods for Shale Pore Structure Characterization

Effect of Shale Sample Particle Size on Pore Structure Obtained from High Pressure Mercury Intrusion Porosimetry

Quantitative Analysis of the Topological Structure of Rock Pore Network

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