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This study examines the thermal characteristics and kinetics of oil shale combustion using thermogravimetric analysis (TGA) at various heating rates. The combustion process includes three stages: dehydration, main combustion (70-80% mass loss), and mineral decomposition. Kinetic analysis using model-free (Ozawa-Flynn-Wall, Kissinger) and model-based (multi-step reaction kinetics) methods revealed that the second-order reaction model (F2) had the highest accuracy. Oil shale combustion involves multi-step reactions, with activation energy and pre-exponential factors varying nonlinearly with conversion rates. Combining model-free and model-based methods provides insights for optimizing combustion processes and equipment design for the efficient utilization of unconventional energy resources.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC12029600 | PMC |
http://dx.doi.org/10.3390/molecules30081819 | DOI Listing |
ACS Omega
September 2025
National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China.
Conventional acidizing struggles to remove complex, organic-rich scales in oil wells, and while strong organic solvents can help, their high cost and safety risks limit field use. To overcome these shortcomings, we developed a low-cost, safe permeability-enhanced-dispersion (PD) technique that first loosens and disperses the scale and then applies acid for thorough cleanup. The PD fluid (DL) contains a mutually soluble fatty alcohol amide phosphate dispersant (DL-F), ethanol, a surfactant blend, and a self-generating acid.
View Article and Find Full Text PDFACS Omega
August 2025
State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Efficient Development, SINOPEC, Beijing 102206, China.
The quantification of movable shale oil is crucial for the effective exploration and development of shale oil resources. Nuclear magnetic resonance (NMR), a nondestructive and noninvasive technique, has become an indispensable tool for evaluating movable oil saturation. However, the small core sizes, high-frequency instrumentation, costly measurements, and significant losses of light hydrocarbons pose substantial challenges in accurately assessing movable oil.
View Article and Find Full Text PDFPLoS One
September 2025
Guangdong Aerospace Research Academy, Guangzhou, China.
The imbibition of water into the pores of tight oil/gas reservoir can displace the oil/gas out. Thus it is an important method to improve the recovery efficiency of tight shale gas and oil. This paper investigated the influence of four main dimensionless parameters on the spontaneous imbibition based on a pores distribution of a real shale sample.
View Article and Find Full Text PDFEnviron Manage
August 2025
Department of Geology and Geography, West Virginia University, Morgantown, WV, USA.
Managing produced water in unconventional oil and gas (UOG) industry is a growing environmental challenge as shale development expands globally. This study evaluates the operational and economic impacts of restricting produced water disposal in southwestern Pennsylvania, where concerns over injection wells and evaporation ponds are rising. We develop a regional mixed-integer programming model calibrated using data from 11,217 wells between 2015 and 2022.
View Article and Find Full Text PDFJ Environ Manage
August 2025
Department of Earth System Science, Stanford University, Stanford, 94305, USA; Woods Institute for the Environment and Precourt Institute for Energy, Stanford University, Stanford, 94305, USA.
A comprehensive, open-access database of oil and gas infrastructure locations is necessary for accurately attributing emissions from satellites and managing pollution impacts on surrounding communities. However, open-access datasets are limited for many infrastructure types, including natural gas compressor stations, which account for approximately one-third of U.S.
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