Experimental study of slickwater volume effect on methane desorption on Longmaxi shale

Liu, Zhonghua; Bai, Baojun; Wang, Yanling; Qu, Hai; Ding, Zhongpei; Xiao, Qi

doi:10.1016/j.jngse.2021.103950

Cited by 9 publications

(5 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…High-temperature steam or water is a commonly used medium for heat injection, while the monolayer adsorption and capillary condensation of moisture in pores can block part of the pore channels, resulting in a low methane desorption capacity in the coal sample with high moisture content. , Considering that water blocking has a negative influence on gas migration, inert gases, such as nitrogen and carbon dioxide, are recommended as heat carriers. Additionally, the heating temperature is an important parameter for heat injection; the decrease in pore volume at a high or low heat temperature harms enhancing CBM production.…”

Section: Discussionmentioning

confidence: 99%

Thermal Evolution Characteristics of the Pore Structure in Coal and Its Dominant Factor Conversion

Wang

Cheng

et al. 2021

Energy Fuels

View full text Add to dashboard Cite

This study analyzed the pore characteristics of coal after heat treatment under air and vacuum conditions using low-temperature gas adsorption (LTGA) measurements. The removal of moisture significantly increases the micropore and mesopore volumes and results in a reduction in surface fractal dimension D 1 and an increase in structure fractal dimension D 2 in the mesopore. Volatile emission leads to the formation of ultramicropores and has a pore-expanding effect on ultramicropores and small mesopores. The enlarged mesopores result in a rougher surface and better connectivity. Thermal expansion decreases pore volume and is the dominant factor of pore evolution at a lower temperature. However, more drastic volatile emission with increasing temperature gradually dominates pore evolution. The heating condition also affects the dominant factor conversion. Volatile emission under the air condition dominates pore evolution under higher temperatures, and pore volume has a tremendous increment.

show abstract

Section: Discussionmentioning

confidence: 99%

Thermal Evolution Characteristics of the Pore Structure in Coal and Its Dominant Factor Conversion

Wang

Cheng

et al. 2021

Energy Fuels

View full text Add to dashboard Cite

show abstract

“…After adding Zn(II)O + K and Zn(II)O + K + isopropanol as catalysts, the content of C, N, and S in the oil sample decreased to varying degrees, while the content of H increased. This may be due to the cleavage of the C-X (X: N, S, O) bond and the involvement of water in the catalytic hydrothermal cracking of heavy oil [18][19][20], resulting in a significant decrease in the viscosity of heavy oil. 2.9.…”

Section: Element Analysis and Four-component Analysis Of Heavy Oil Be...mentioning

confidence: 99%

Oil-Soluble Exogenous Catalysts and Reservoir Minerals Synergistically Catalyze the Aquathermolysis of Heavy Oil

Li,

Zhang,

Wang

et al. 2023

Molecules

View full text Add to dashboard Cite

Oil is the “blood” and economic lifeblood of modern industry, but traditional light crude oil has been over-consumed, and it has been difficult to meet human demand for energy, so the exploitation of heavy oil is particularly important. In this paper, an oil-soluble catalyst was synthesized to catalyze the pyrolysis reaction of heavy oil in collaboration with reservoir minerals, so as to achieve efficient viscosity reduction of heavy oil and reduce production costs. The experimental results showed that Zn(II)O + K had the best synergistic viscosity reduction effect after the aquathermolysis of No. 1 oil sample under the reaction conditions of 180 °C, 4 h, 30% of water, and 0.2% of catalyst, respectively, and the viscosity reduction rate was 61.74%. Under the catalysis of the isopropanol system, the viscosity reduction rate was increased to 91.22%. A series of characterizations such as freezing point, thermogravimetric analysis, DSC analysis, component analysis, gas chromatography, wax crystal morphology analysis, and GC-MS analysis of aqueous organic matter were carried out on heavy oil after reaction by different reaction systems, and it could be verified that the viscosity of heavy oil was reduced. Finally, through the study of the reaction mechanism of the model compound, combined with the aqueous phase analysis, it can be clearly found that the depolymerization between macromolecules, the breaking of heteroatom chains, hydrogenation, ring opening, and other effects mainly occur during the reaction, thereby weakening the van der Waals force and hydrogen bond of the recombinant interval, inhibiting the formation of grid structure in heavy oil and effectively reducing the viscosity of heavy oil.

show abstract

“…The Freundlich model can be used as a version of the Henry model having a statistical thermodynamic base. 50,51 This model describes the adsorption phenomenon in shale/coal having heterogeneous surfaces and can be defined as…”

Section: Adsorption Of Gas In Shalementioning

confidence: 99%

“…The Freundlich model can be used as a version of the Henry model having a statistical thermodynamic base. , This model describes the adsorption phenomenon in shale/coal having heterogeneous surfaces and can be defined as Here, V is the total adsorbed volume, P is pressure, k is the Freundlich constant that denotes adsorption capacity, and n is a constant that depicts adsorption intensity.…”

Section: Adsorption Of Gas In Shalementioning

confidence: 99%

A Review on the Role of Organic Matter in Gas Adsorption in Shale

Bakshi

Vishal

2021

Energy Fuels

View full text Add to dashboard Cite

Shale gas exploration has gained tremendous attention worldwide, because of the successful development and progress in exploitation technology in the North American and Chinese basins. Since organic-rich shales are good sources of gas, and thick layers of such shales are present worldwide, significant potential exists for countries with such reservoirs. For efficient exploitation of shale gas reserves, a thorough understanding of the methane storage mechanism is required. Several physico-chemical–mechanical factors, along with heterogeneity in shales influence the storage mechanism, and add to the complexities of the unconventional hydrocarbon reservoir. Thus, a systematic investigation is essential to explore the nature of shale, and to assess the factors influencing their gas storage capacities. Among other factors, organic matter content is considered to be a crucial factor for gas storage and transport. This paper attempts to critically review the pore attributes of the organic matter present in shale by a thorough assessment of scientific articles. We comprehensively describe the factors that affect the behaviour of shale that lead to the differences in pore characteristics. This paper highlights shale as an adsorbent; explains the different gas adsorption isotherm types, adsorption thermodynamics, and molecular simulation of methane sorption behavior in kerogen. Additional factors that influence the organic pore characteristics (total organic content, kerogen type, and thermal maturity) have been critically reviewed and discussed. Finally, the article highlights the dependence of these factors along with moisture and temperature, on shale’s methane sorption capacity. The article points out the research gaps in the field, while discussing experimental protocols of gas adsorption analysis. Future suggestions for understanding the methane sorption capacity in shales are also provided.

show abstract

Experimental study of slickwater volume effect on methane desorption on Longmaxi shale

Cited by 9 publications

References 32 publications

Thermal Evolution Characteristics of the Pore Structure in Coal and Its Dominant Factor Conversion

Thermal Evolution Characteristics of the Pore Structure in Coal and Its Dominant Factor Conversion

Oil-Soluble Exogenous Catalysts and Reservoir Minerals Synergistically Catalyze the Aquathermolysis of Heavy Oil

A Review on the Role of Organic Matter in Gas Adsorption in Shale

Contact Info

Product

Resources

About