Evaluation of gas resource potentiality, geochemical and mineralogical characteristics of Permian shale beds of Latehar-Auranga Coalfield, India

Mendhe, Vinod Atmaram; Kumar, Vivekanand; Saxena, V. K.; Bannerjee, Mollika; Kamble, Alka Damodhar; Singh, Bhagwan D.; Mishra, Subhashree; Sharma, Sadanand; Kumar, Jaywardhan; Varma, Atul Kumar; Mishra, Divya Kumari; Samad, Suresh Kumar

doi:10.1016/j.coal.2018.06.022

Cited by 17 publications

(21 citation statements)

References 41 publications

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“…The TOC data are measured with Rock-Eval-VI for pyrolysis analysis according to the GB/T 18602-2001 standard (Zhang et al., 2018b). The Rock-eval pyrolysis technique incorporates temperature-programmed heating of a small amount of sample in an inert atmosphere (helium) in order to determine the number of free hydrocarbons and hydrocarbon compounds present in the coal/shale (Mendhe et al., 2018). The TOC is actually a value that is calculated by adding the residual and pyrolyzed organic carbons.…”

Section: Samples and Experimental Methodsmentioning

confidence: 99%

Influence of reservoir properties on the methane adsorption capacity and fractal features of coal and shale in the upper Permian coal measures of the South Sichuan coalfield, China

Bao

Yin

et al. 2019

Energy Exploration & Exploitation

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Pore structure plays an essential role in the reservoir heterogeneity and methane adsorption capacity. Significant progress has been made in the pore structure classification of porous materials (such as coal and shale). Considering the pore structure characterization of the coal measures and the measuring range of high-pressure mercury intrusion porosimetry and low-pressure N2/CO2 gas adsorption, an integrated classification for coal and shale is provided. They are micropore (<2 nm), mesopore (2–100 nm), macropore A (100 nm–1 µm), macropore B (1–10 µm), and micro-fracture (>10 µm). For coal and shale samples from Guxu mining area, the micropores and mesopores largely control the gas adsorption while micro-fractures and macropore B are significant for the storage and flow of free gas. The fractal dimensions calculated from limited N2 adsorption data are not suitable for the coal samples which are not developed in mesopore and macropore A; these samples are precisely corresponding to the N2 adsorption/desorption isotherms of group B (reversible isotherm). Furthermore, the main factors influencing the methane adsorption capacity of coal and shale in the coal measures are micropore frequency, micro-fracture width, clay mineral composition, and total organic carbon content.

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Section: Samples and Experimental Methodsmentioning

confidence: 99%

Influence of reservoir properties on the methane adsorption capacity and fractal features of coal and shale in the upper Permian coal measures of the South Sichuan coalfield, China

Bao

Yin

et al. 2019

Energy Exploration & Exploitation

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“…The samples show type II adsorption isotherms signifying that the shales are dominated with meso-to macropore system, and desorption profiles display H3 hysteresis. This indicates the presence of plate-like divisions that leads to the development of slit-shaped pores (Sing et al, 1985;Mendhe et al, 2017cMendhe et al, , 2018a; Fig. 4a-g).…”

Section: Surface Area Analysismentioning

confidence: 96%

“…For the analysis, the studied shale cores were crushed and sieved (0.8-1.0-mm size). The prepared samples were kept in oven to dry at 105 ± 5 °C for 3 to 4 h. The samples were weighed and kept for degassing at about 300 °C for 1 to 2 h to remove impurities and the moisture content (Quantachrome, 2014;Mendhe et al, 2017aMendhe et al, , 2018a. After degassing, the cell + samples were again weighed and placed tightly in analysis station for further sorption analysis.…”

Section: Low-pressure N 2 Sorption Isotherm Analysismentioning

confidence: 99%

Pore structures and fractal dimensions in Early Permian Barakar shales of Rajmahal Basin, Jharkhand, India

et al. 2021

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The proximate, low-pressure N 2 sorption, X-ray diffraction, and organic petrography parameters have been used to delineate the pore structures and fractal dimensions in the Barakar shales of Rajmahal Basin, India. The information has been utilized for the assessment of shale gas reservoir and to know about the mode of occurrence and storage capacity of shales for the entrapment of methane (CH 4 ). The studied shales are characterized by high fixed carbon contents (10.14-46.09 wt.%) and contain significant abundance of brittle minerals, like quartz (6.0-51.6%) and mica (1.0-41.2%). The petrographic observations show that the studied samples comprise of numerous laths of vitrinite (collotelinite and vitrodetrinite) and semifusinite macerals and quartz grains. The data of low-pressure N 2 sorption analysis indicates the shales encompass mainly meso-to macropores and microfractures. The total pore volume, average pore size, and multipoint BET surface area of the studied shales vary from 0.012 to 0.023 cc/g, 8.295 to 10.840 nm, and 5.752 to 10.390 m 2 /g respectively. Two types of fractal dimensions (D 1 and D 2 ) have been calculated by using FHH (Frankel-Halsey-Hill) method from the N 2 adsorption isotherm. The high values of fractal dimensions (2.1949 < D 1 < 2.4837 and 2.6668 < D 2 < 2.7247) are indicating the highly rugged pore surface or complexity in the pore structures.

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“…The correct nouns have TOC values that range from 0.5%-2% (average 1.29%), indicating medium to good source rock [28][29][30], with some samples constituting excellent source rock based on the fact that their TOC values are > 4% (Figure 4). In the overly-ing and underlying mudstones, however, the dolomites are poorly developed, with TOC values generally < 0.5% (Figure 4), which is indicative of poor source rock [31,32]. The primary unit has organic type II 2 , and there are small amounts of types II 1 and III (Figures 7 and 9).…”

Section: Good Hydrocarbon-generation Potential In the Well-developed mentioning

confidence: 99%

Sedimentary facies of Paleogene lacustrine dolomicrite and implications for petroleum reservoirs in the southern Qianjiang Depression, China

et al. 2019

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Paleogene lacustrine dolomicrite of Unit II of the lower Xingouzui Formation in the southern part of the Qianjiang Depression, China forms “tight carbonate” hydrocarbon reservoirs that can be divided into the following four dolomicrite types: dolomicrite, muddy dolomicrite, sandy dolomicrite, and gypsiferous dolomicrite. These four dolomicrite types occur in the following three distinct combinations, which are referred to as subfacies: (1) interbedded dolomicrite (or sandy dolomicrite) and dark-gray siliciclastic mudstone, interpreted as open lacustrine deposits, (2) grayish-dark siliciclastic mudstone with thinly-bedded muddy dolomicrite or gypsiferous dolomicrite, interpreted as restricted lacustrine deposits, and (3) grayish-green mudstone with thinlybedded brown-yellow siltstone, interpreted as lacustrine shoreline deposits. The spatial distribution of these subfacies was controlled by the paleo-provenance system, paleo-microgeomorphology, and lake level fluctuations. In the open lacustrine subfacies, dolomicrite or sandy dolomicrite are often vertically interbedded with dark argillite rocks, forming a suitable petroleum source rockreservoir association. The dolomicrite and sandy dolomicrite reservoirs possess many secondary crystalline pores and few dissolution pores, with mesopore porosities in the range of 15%–25%. The dark mud shale interval has total organic carbon (TOC) values exceeding 4% (averaging 1.29%). The organic matter is mainly type II2, with vitrinite reflectance values averaging 0.57, which indicates potential for the generation of immature oil. The oil-source correlation results indicated that the n-alkanes of the crude oil and source rock samples from Unit II of the lower Xingouzui Formation exhibit single peak values, with a main peak (post-peak) in C22 and a Pr/Ph ratio $#x003C; 1 in a C2920R $#x003E; C2720R $#x003E; C2820R distribution. These features indicate that source-reservoir interbedding is characteristic of selfsourced reservoirs. The interbedded dolomicrite (or sandy dolomicrite) and dark-gray siliciclastic mudstone, i.e., subfacies (1), is a favorable target for hydrocarbons in the study area.

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Evaluation of gas resource potentiality, geochemical and mineralogical characteristics of Permian shale beds of Latehar-Auranga Coalfield, India

Cited by 17 publications

References 41 publications

Influence of reservoir properties on the methane adsorption capacity and fractal features of coal and shale in the upper Permian coal measures of the South Sichuan coalfield, China

Influence of reservoir properties on the methane adsorption capacity and fractal features of coal and shale in the upper Permian coal measures of the South Sichuan coalfield, China

Pore structures and fractal dimensions in Early Permian Barakar shales of Rajmahal Basin, Jharkhand, India

Sedimentary facies of Paleogene lacustrine dolomicrite and implications for petroleum reservoirs in the southern Qianjiang Depression, China

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