image processing based characterisation of coal cleat networks

Quantitative characterization of fracture structure in coal based on ...

Quantitative characterization of fracture structure in coal based on ...

The characterization of fracture structures is key for evaluating the permeability of coalbed methane (CBM) reservoirs, and an interconnected fracture network is essential for the production of CBM. Taking the Upper Permian coal in the eastern Yunnan and western Guizhou region as an example, we systemically studied the characteristics of coal deformation and fracture development through direct ...

Porosity and permeability characterization of coal: a microcomputed ...

Porosity and permeability characterization of coal: a microcomputed ...

1. Introduction. Coal is a dual porosity system containing micropores and a network of natural fractures known as cleats. Whereas the micropores account for most of the porosity in coal, the cleat network offers the permeability for fluid flow (Clarkson and Bustin, 1996, Moore, 2012, Puri et al., 1991).Cleats are characterized by two main orthogonal sets of fractures "face" and "butt ...

Nanomechanical Properties and PoreScale Characterization of Different ...

Nanomechanical Properties and PoreScale Characterization of Different ...

Characterization of coal microstructure and the associated rock mechanical properties are of key importance for coal seam exploration, coal bed methane development, enhanced coal bed methane production and CO2 storage in deep coal seams. Considerable knowledge exists about coal chemical properties, but less is known about the nanoscale to the microscale structure of coals and how they change ...

Stress sensitivity of coal reservoir and its impact on ... Springer

Stress sensitivity of coal reservoir and its impact on ... Springer

Image processing based characterisation of coal cleat networks. Int J Coal Geol, 169(1): 121. ... The characteristics and origins of cleat in coal from western north China. Int J Coal Geol, 47(1): 5162. Google Scholar Su X, Wang Q, Lin H, Song J, Guo H (2018). A combined stimulation technology for coalbed methane wells: part 1 theory and ...

StressDependent Deformation and Permeability of a Fractured Coal ...

StressDependent Deformation and Permeability of a Fractured Coal ...

A 2D numerical model is constructed incorporating a real coal cleat network. A coupled hydromechanical model that incorporates fracture deformation, damage evolution and stressdependent permeability is used for the simulation. ... Image processing based characterisation of coal cleat networks. Int J Coal Geol 169:121. Google Scholar

Cleatscale characterisation of coal: An overview ScienceDirect

Cleatscale characterisation of coal: An overview ScienceDirect

To obtain the geometrical statistics of the coal cleat network at the core scale, quantitative image analysis methods on the segmented microCT images have been developed. BossieCodreanu et al. (2004) and ( Mazumder et al., 2006) measured cleat density, spacing, orientations and aperture sizes using microCT scanning.

Characteristics of Pore and Fracture of Coal with Bursting ... MDPI

Characteristics of Pore and Fracture of Coal with Bursting ... MDPI

Coal is a complex heterogeneous and anisotropic material conformed with fractal characteristics. The pore and fracture characteristics have important influence on the dynamic disasters including rock burst and gas outburst, however, the relationship between them is not accurately investigated due to inadequate research method. The pore and fracture distribution of coal with different bursting ...

Image processing based characterisation of coal cleat networks

Image processing based characterisation of coal cleat networks

Figure 6 a. Initial feature and the principle of b. dilation and c. erosion of image features using a diskshaped element with radius r to reconnect features originally being separated due to the binary process "Image processing based characterisation of coal cleat networks"

An intelligent system to identify coal maceral groups using markov ...

An intelligent system to identify coal maceral groups using markov ...

Galindo Sergio., Bringemeier D. and Scheuermann A., Image processing based characterisation of coal cleat networks, ... An approach on determination on coal quality using digital image processing, Int. Journal of Engineering Research and Applications 5 (12) (2015), 38 ...

PDF InternationalJournal of Coal Geology CORE

PDF InternationalJournal of Coal Geology CORE

Image processing based characterisation of coal cleat networks J. Busse *a, de Dreuzy b, Sergio Galindo Torres a, D. Bringemeier a,c, A. Scheuermann a *Corresponding author:, +61 40 1906 327 a Geotechnical Engineering Centre, School of Civil Engineering, University of Queensland, St. Lucia, QLD, Australia b

Image processing based characterisation of coal cleat networks

Image processing based characterisation of coal cleat networks

Abstract. Characterisation of the cleat network serves as the basis for estimating the hydraulic and mechanical seam properties which in turn are fundamental for flow and geomechanical modelling ...

Threedimensional visualization and quantitative characterization of ...

Threedimensional visualization and quantitative characterization of ...

The characteristics of porefracture networks in coal seams and their evolution under compression are important for exploration and development of coalbed methane (CBM) and for the forecasting of coal dynamic disasters. Significant process has been made in fracture characteristics of rocks, however, the visualization and detailed quantitative characterization of realtime dynamic evolution of ...

The Application of Coal Cleaning Detection System Based ... ResearchGate

The Application of Coal Cleaning Detection System Based ... ResearchGate

Hobson et al. established a set of coal gangue separation process based on image processing and analysis, and found that texture is more suitable for the application of coal gangue separation [26].

PDF InternationalJournal of Coal Geology

PDF InternationalJournal of Coal Geology

Image processing based characterisation of coal cleat networks J. Busse *a, de Dreuzy b, Sergio Galindo Torres a, D. Bringemeier a,c, A. Scheuermann a *Corresponding author:, +61 40 1906 327 a Geotechnical Engineering Centre, School of Civil Engineering, University of Queensland, St. Lucia, QLD, Australia b

A review of experimental research on Enhanced Coal Bed ... ScienceDirect

A review of experimental research on Enhanced Coal Bed ... ScienceDirect

A laboratory based systematic physicochemical characterization of the concerned coal bed associated with its geological disposition is therefore in demand, to assess the potential of the reservoir. In this article, we review the present day stateoftheart experimental knowledge and practices followed globally, in combined CO 2 sequestration ...

Controls on coal cleat spacing | Semantic Scholar

Controls on coal cleat spacing | Semantic Scholar

Semantic Scholar extracted view of "Controls on coal cleat spacing" by G. Dawson et al. ... Image processing based characterisation of coal cleat networks. ... (CSG) is an unconventional energy resource, whereby production is mainly controlled by the underlying fracture networks, known as "cleats". The natural cleats are generally mineralized

Image processing based characterisation of coal cleat networks

Image processing based characterisation of coal cleat networks

Characterisation of the cleat network serves as the basis for estimating the hydraulic and mechanical seam properties which in turn are fundamental for flow and geomechanical modelling in the context of underground coal mining. Cleat and cleat network geometry can be described as a function of frequency, aperture, size, orientation relative to in situ stresses, connectivity and porosity, with ...

CT slice (A) and cleat interpretation (B). ResearchGate

CT slice (A) and cleat interpretation (B). ResearchGate

Download scientific diagram | CT slice (A) and cleat interpretation (B). from publication: A new characterization method for coal bed methane | Coal bed methane reservoirs are hard to characterize ...

Characterization of coal porosity and permeability evolution by ...

Characterization of coal porosity and permeability evolution by ...

Based on the scanning at two scales, the detail structures of coal samples are reconstructed with the image processing technique, which realizes the multiscale qualitative and quantitative ...

Minerals | Free FullText | Origin of a Petrographic Coal ... MDPI

Minerals | Free FullText | Origin of a Petrographic Coal ... MDPI

A petrographic coal structure of Late Permian coals from the Liupanshui coalfield, Western Guizhou, SW China, has been distinguished for its novel macrolithological characteristics. Petrographic, mineralogical and geochemical studies have been conducted for a typical coal sample ( coal, Songhe coalmine, Panzhou County, China) and its geological genesis and significance for coalbed methane ...

PDF d a,b c a,b b c SSRN

PDF d a,b c a,b b c SSRN

characterisation of coal cleat based on Xray microscopic computed tomography ( CT) and feature ... a key step after the initial cleat network extraction from µCT images is the separation of the network ... Although image processingbased methods for cleat separation have been reported before (Jing, Armstrong et al. 2016, Busse, De Dreuzy et ...

Roughwalled discrete fracture network modelling for coal ...

Roughwalled discrete fracture network modelling for coal ...

1. Introduction. Coal seam gas (CSG) is a form of unconventional natural gas extracted from coal bed reservoirs, whose production is mainly controlled by the underlying fracture networks, known as "cleats" [20], [58].In these reservoirs, the matrix is usually regarded to be relatively impermeable [62], [48], while the fractures contribute as the main hydraulic conductivity of the rock mass ...

Coal properties and cleat attributes at Tanjung Enim coalfield in South ...

Coal properties and cleat attributes at Tanjung Enim coalfield in South ...

Observation on the Tanjung Enim coal outcrops has been conducted to evaluate coal and cleat characteristics, particularly those occurring at Suban and Air Laya Putih (ALP) sites. Tectonically, the region is located in the South Palembang Subbasin. In this region, there are four to five coal seams dipping to the SW direction.

Influence of Coal Cleats on Conical Pick Cutting Process Based on PFC

Influence of Coal Cleats on Conical Pick Cutting Process Based on PFC

The face cleat spacing has a greater influence on the cutting process of conical pick than that of butt cleat spacing. (3) Neglecting at the moment of contact between the conical pick and coal, the number of tensile cracks is more than twice that of the shear cracks in the entire cutting process.

Facets of coalbed methane reservoir in East Bokaro Basin, India

Facets of coalbed methane reservoir in East Bokaro Basin, India

The pore network model signifying that the studied coal seams are microstructurally different comprises a lateral difference in pore and cleat/fracture. ... Image processing based characterization of coal cleat networks. Int. J. Coal Geol. (2017) ... Cleatscale characterization of coal: an overview. J. Nat. Gas Sci. Eng.

Cleatscale characterisation of coal: An overview ScienceDirect

Cleatscale characterisation of coal: An overview ScienceDirect

This paper reviews recent developments on the cleatscale characterisation of coal. Novel microCT imaging and image calibration methods are described. The application of microCT imaging for studying diffusion processes in ultralow permeability media is shown. The extraction of statistical information from microCT images to reconstruct cleats are demonstrated.

Image feature extraction and recognition model construction of coal and ...

Image feature extraction and recognition model construction of coal and ...

Using image recognition technology to realize coal gangue recognition is one of the development directions of intelligent fully mechanized caving mining. Aiming at the problem of low accuracy of ...

Hubungan Sebaran Cleat Dengan Nilai Proximate Batubara Pada ...

Hubungan Sebaran Cleat Dengan Nilai Proximate Batubara Pada ...

Batubara yang terendapkan memberikan kenampakan geologi. Salah satu kenampakan tersebut adalah cleat pada batubara. Cleat pada batubara merupakan rengkahan yang ada pada batubara. Terdapat dua jenis cleat pada batubara, yaitu face cleat dan butt cleat, namun pada penelitian ini akan lebih memfokuskan penelitian pada face cleat.

3D visualization of tectonic coal microstructure and quantitative ...

3D visualization of tectonic coal microstructure and quantitative ...

1. Introduction. Coal reservoir is a multiscale complex system with the naturally fractured dualporosity medium consisting of cleats and matrices (Gan et al., 1972; Harpalani and Chen, 1997).The pore structure of coal matrix which is the main storage site of coalbed methane (CBM), and the fracture and cleat which are the permeable channel for CBM production, amalgamate to form the ...

Coal cleat reconstruction using microcomputed tomography imaging

Coal cleat reconstruction using microcomputed tomography imaging

Estimates of these parameters can be made from imagebased threedimensional (3D) characterization of coal cleats using Xray microcomputed tomography (μCT). One key step in this process, after cleat extraction, is the separation of individual cleats, without which the cleats are a connected network and statistics for different cleat sets ...

Image processing based characterisation of coal cleat networks

Image processing based characterisation of coal cleat networks

DOI: / Corpus ID: ; Image processing based characterisation of coal cleat networks article{Busse2017ImagePB, title={Image processing based characterisation of coal cleat networks}, author={Julia Busse and JeanRaynald de Dreuzy and Sergio A. G. Torres and Detlef Bringemeier and Alexander Scheuermann}, journal={International Journal of Coal Geology}, year={2017 ...

Quantitative micro mechanical and pore structural characterisation of ...

Quantitative micro mechanical and pore structural characterisation of ...

He proposed a simplified Sierpinskilike fractal model based on μCT to further study the evolution of the porefracture network with higher measurement accuracy. Reydick et al. [46] studied the influence of HCl acidic cleat demineralization on coal permeability based on μCT, and proved that this method improves the vertical permeability.

Frontiers | Experimental and numerical model of anisotropic ...

Frontiers | Experimental and numerical model of anisotropic ...

The permeability of coal in parallel face cleat direction is the largest, followed by the permeability of coal in parallel butt cleat direction, and that in vertical bedding direction is the minimum. The ratios of k x : k y : k z are ::1, ::1, ::1, and ::1 respectively when the CO 2 injection pressure increases ...

Yu JING | Research Fellow | PhD | UNSW Sydney, Kensington | UNSW ...

Yu JING | Research Fellow | PhD | UNSW Sydney, Kensington | UNSW ...

An imagebased coal network model for simulating hydromechanical gas flow in coal: An application to carbon dioxide geosequestration ... Characterization of coal microstructure and the ...

The Influence of CO2 Saturated Brine on Microstructure of Coal ...

The Influence of CO2 Saturated Brine on Microstructure of Coal ...

Carbon dioxide geological storage in deep underground oil and gas reservoirs or coal seam is considered a key technology to effectively mitigate carbon emissions. Deep coal seams are the potential host rock for CO2 storage, with chemical reactions occurring when coal is exposed to CO2saturated brine. However, limited studies have been conducted to reveal the effect of chemical reaction ...