scholarly journals Experimental Investigation of Evolution of Pore Structure in Longmaxi Marine Shale Using an Anhydrous Pyrolysis Technique

Minerals ◽  
2018 ◽  
Vol 8 (6) ◽  
pp. 226 ◽  
Author(s):  
Zhaodong Xi ◽  
Jing Wang ◽  
Jingang Hu ◽  
Shuheng Tang ◽  
Heqi Xiao ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Pore Structure ◽  
Marine Shale

Pore structure characteristics and its effect on adsorption capacity of Niutitang marine shale in Sangzhi block, southern China

2019 ◽  
Vol 7 (4) ◽  
pp. T843-T856
Author(s):  
Xinghua Wang ◽  
Arash Dahi Taleghani ◽  
Wenlong Ding
Keyword(s):  
Organic Matter ◽  
Pore Structure ◽  
Adsorption Capacity ◽  
Southern China ◽  
Quartz Content ◽  
Isothermal Adsorption ◽  
Structure Characteristics ◽  
Marine Shale ◽  
Lp Formula ◽  
Organic Pores

Characteristics of shale pore structures may play an important role in natural gas accumulation and consequently estimating the original gas in place. To determine the pore structure characteristics of Niutitang marine shale in the Sangzhi block, we carried out [Formula: see text] adsorption-desorption (LP-[Formula: see text]GA), [Formula: see text] adsorption (LP-[Formula: see text]GA), and methane isothermal adsorption on shale samples to reveal the pore size distribution (PSD) and its impact on the adsorption capacity. Results indicate that the Niutitang Shale is in stages of maturity and overmaturity with good organic matter, and they also indicate well-developed interparticle, intraparticle, and organic pores. Quartz and clay are found to be the main minerals, and the high illite content means that the Niutitang Shale is experiencing the later stage of clay mineral transformation. Various-sized shale pores are well-developed, and most of them are narrow and slit-like. For pores with diameters of 2–300 nm measured with LP-[Formula: see text]GA, mesopores (2–50 nm) contribute most of the total specific surface area (SSA) and total pore volume (TPV) in comparison to macropores (50–300 nm). For micropores ([Formula: see text]) tested by LP-[Formula: see text]GA, the PSD appears to be multimodal; shale pores of 0.50–0.90 nm diameter contribute most of the SSA and TPV. [Formula: see text]-SSA and [Formula: see text]-SSA indicate positive correlations with their corresponding TPV. The total organic matter (TOC) has good correlation with the SSA and TPV of micropores. The Langmuir volume positively correlates with the total SSA. Additionally, the TOC content has a good correlation with the Langmuir volume, which is consistent with the observation of well-developed fossils of diatoms and organic pores. As an important source of organic matter, more diatoms mean more organic matter, larger TOC values and quartz content, larger SSA and TPV of micropores, and, of course, stronger shale adsorption capacity. The results provide important guidance for the exploration and development of shale gas existing in the Sangzhi block.

Genetic Mechanism of Low Resistivity in High-Mature Marine Shale: Insights from Study on Pore Structure and Composition

2021 ◽  
Author(s):  
Zixin Xue ◽  
Zhenxue Jiang ◽  
Xin Wang ◽  
Zhiye Gao ◽  
Jiangqi Chang ◽  
...  
Keyword(s):  
Pore Structure ◽  
Genetic Mechanism ◽  
Low Resistivity ◽  
Marine Shale

Experimental Investigation on Correlation Between Permeability Variation and Pore Structure During Coal Pyrolysis

2009 ◽  
Vol 82 (2) ◽  
pp. 401-412 ◽  
Author(s):  
Zhao Yangsheng ◽  
Qu Fang ◽  
Wan Zhijun ◽  
Zhang Yuan ◽  
Liang Weiguo ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Pore Structure ◽  
Coal Pyrolysis ◽  
Permeability Variation
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