Article
Engineering, Chemical
Long Fan, Shimin Liu
Summary: Accurate measurement of shale gas adsorption capacity is crucial for reservoir appraisal and production stimulation. An improved lab method for shale adsorption measurement and diffusivity evaluation was introduced, showing that the improved method effectively reduces measurement errors and is suitable for materials with limited adsorption capacity.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2021)
Article
Energy & Fuels
Jinsheng Wang, Hanin Samara, Philip Jaeger, Vivien Ko, Dustin Rodgers, David Ryan
Summary: This study evaluates CO2 adsorption under pressure and temperature conditions for geological storage in two non-shale reservoirs in Canada. The results show that CO2 adsorption can substantially increase storage capacity and decrease leaking potential by reducing overpressure in the reservoir caprock. The adsorption behaviors of rocks from different reservoirs are distinct, and CO2 can enter small rock pores to enhance adsorption and utilization of reservoir capacity.
Article
Energy & Fuels
Bo Pang, Jun-Qing Chen, Xiong-Qi Pang, Tao Hu, Yue Sheng
Summary: In this study, five types of hydrocarbon expulsion dynamics were studied to understand the mechanism of hydrocarbon expulsion from deep source rocks. A model was proposed to evaluate the relative contribution of different dynamics using mass balance principle, and it was applied to Cambrian source rocks in the Tarim Basin. The results showed that capillary pressure difference (CPD) had the largest contribution (>50%), followed by compaction, product volume expansion, and thermal expansion. Diffusion had minimal contribution. The research categorized the hydrocarbon expulsion process into three stages based on the dominant dynamics, providing insights for hydrocarbon exploration in tight oil and gas reservoirs.
Article
Mechanics
Saad Alafnan
Summary: Natural gas stored in source rocks plays a significant role in meeting energy demand. Source rocks exhibit complex transport and storage processes due to their unique pore characteristics. Nanopores in source rocks offer large surface area for hydrocarbon storage. However, our understanding of the mechanisms behind hydrocarbon storage and transport is still limited. This study investigates the dominant diffusion mechanism in representative organic nanopores and finds that free molecular diffusion is the main mechanism. Additionally, the diffusivity coefficients deviate from theoretically calculated values, especially in post-mature cases. The deviation reduces with increasing pressure and pore size. The results provide valuable insights for better describing hydrocarbon transport in source rocks.
Article
Energy & Fuels
Fengyu Sun, Gaoshe Cao, Zhou Xing
Summary: The study systematically evaluates the source rocks in the Upper Paleozoic in Western Henan, finding mudstone, carbonate rocks, and coal rocks with type III organic matter and mature to over-mature thermal evolution stage. The thermal evolution tends to increase with depth, possibly related to Meso-Cenozoic tectonothermal events.
Article
Chemistry, Organic
Gabriele Theumer, Ingmar Bauer, Anne Jaeger, Lorenz Schwark, Hans-Joachim Knoelker
Summary: This study successfully synthesized seven C-2-alkylcarbazoles using a series of methods, providing analytical standards for identifying them in petroleum samples and source rocks.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Energy & Fuels
Malgorzata Labus
Summary: This study focused on the decomposition reactions of pyrite under different atmospheres, in kerogen and bulk source rock, and the evolved gases. The results showed that only SO2 gas was detected during pyrite decomposition. Pyrite content over 10% in a rock sample can be detected, and SO2 is released during combustion and pyrolysis processes.
Article
Construction & Building Technology
Hans Janssen
Summary: This paper published in February 2022 discusses moisture storage and transport in cement mortars and pastes, as well as the influence of internal hydrophobation on moisture imbibition. However, serious concerns are raised regarding the reliability of the obtained sorption isotherms, pore volume distributions, and pore flow resistances.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Hans Janssen
Summary: This paper translated the impact of adding a hydrophobic agent on moisture diffusion in cement pastes and raised doubts about its reliability. Criticizing the authors and requesting an explanation and revision.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Engineering, Chemical
Wei Zhang, Amin Mehrabian
Summary: This paper presents a thermodynamic description of the three-way coupling of gas flow, sorption, and solid strain in porous elastic media, and applies it to the problem of natural gas sorption and flow in fractured rocks. The authors develop an analytical solution to this problem using the homotopy-perturbation method and study the entanglement between gas desorption and rock deformation. The results show that rock compaction reduces gas production rate, but gas desorption from the pore walls counteracts this effect.
TRANSPORT IN POROUS MEDIA
(2023)
Article
Geochemistry & Geophysics
Zhao-Wen Zhan, Guo-Xiang Wang, Yankuan Tian, Xin Zhan, Tian Liang, Yao-Ping Wang, Yan-Rong Zou, Ping 'an Peng
Summary: This study proposes a method for analyzing short-chain alkylbenzenes in source rocks, and evaluates the maturity and hydrocarbon generation stage of the source rocks using these parameters. Additionally, other parameters are proposed for identifying the organic matter input and depositional environment conditions of source rock samples. These parameters are valuable tools for geochemical studies of highly matured light oils and condensates.
ORGANIC GEOCHEMISTRY
(2023)
Article
Geosciences, Multidisciplinary
Jianping Chen, Xulong Wang, Jianfa Chen, Yunyan Ni, Baoli Xiang, Fengrong Liao, Wenjun He, Limiao Yao, Erting Li
Summary: The identification of the origin and source of natural gas has always been a difficult and important issue, especially in the complex and diverse petroliferous sedimentary basins in China. This study established new equations to decipher the relationship between the maturity of gas source rocks and the carbon isotopic composition of methane, which is crucial for improving the geological theory of natural gas.
SCIENCE CHINA-EARTH SCIENCES
(2021)
Article
Chemistry, Multidisciplinary
Chuanming Li, Jianhui Zeng, Haitao Liu, Hongjun Li, Xiaoqing Bu, Shuning Liu
Summary: This study discusses the organic facies characteristics and hydrocarbon-generation potential of Upper Paleozoic source rocks in the Huanghua Depression. The results show that the Taiyuan and Shanxi Formations are oil-prone, with mudstone having a higher oil-generation potential than carbonaceous mudstone and coal. The organic facies in the study area can be classified into six types, with the Taiyuan Formation having a strong hydrocarbon-generation capacity.
Article
Geosciences, Multidisciplinary
Martin Stockhausen, Roberto Galimberti, Rouven Elias, Lea Di Paolo, Lorenz Schwark
Summary: The Expulsinator device provides a unique methodology to simulate oil and gas formation and expulsion processes under near-natural conditions, allowing for the study of differences in generation and expulsion characteristics among different source rocks with varying lithology and kerogen type.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Derek R. Du Bois, Adam J. Matzger
Summary: Seeding during the synthesis of metal-organic frameworks (MOFs) enhances control over phase expression and results in reduced solvent quantities and improved yield. The method was explored for four different MOFs, demonstrating its broad applicability in driving phase selection and reducing environmental impact in industrially relevant conditions.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Energy & Fuels
Jing Li, Shixin Zhou, Garri Gaus, Yuanju Li, Yu Ma, Kefei Chen, Yuhong Zhang
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2018)
Article
Energy & Fuels
Assad Ghazwani, Ralf Littke, Garri Gaus, Christoph Hartkopf-Froeder
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2018)
Article
Energy & Fuels
Garri Gaus, Alexandra Amann-Hildenbrand, Bernhard M. Krooss, Reinhard Fink
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2019)
Article
Geochemistry & Geophysics
Garri Gaus, Anton Kalmykov, Bernhard M. Krooss, Reinhard Fink
Article
Geosciences, Multidisciplinary
Garri Gaus, Reinhard Fink, Alexandra Amann-Hildenbrand, Bernhard M. Krooss, Ralf Littke
Summary: Experimental results showed that increasing overburden stress significantly reduced both specific pore volume and excess sorption capacity. The stress sensitivity was most prominent in the total organic carbon (TOC)-rich Kimmeridge sample and decreased in the order of Bossier, Eagle Ford, and Alum. The stress dependence of the methane excess sorption capacity decreased in the order of Eagle Ford, Bossier, Kimmeridge, and Alum.
Article
Energy & Fuels
Zhazha Hu, Garri Gaus, Timo Seemann, Qian Zhang, Ralf Littke, Reinhard Fink
Summary: This study evaluated the shale gas potential of Ediacaran and Lower Silurian shales from the Upper Yangtze platform, focusing on the contributions of clay minerals and organic matter to sorption capacity. Results showed that Ediacaran shales have comparable properties to other producing shale gas systems but exhibit differences with lower Silurian shales in terms of pore structure and overall porosity, affecting gas production. The study also identified the significant influence of TOC content and clay minerals on sorption capacity, highlighting the complex factors affecting shale gas potential.
GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
(2021)
Article
Geochemistry & Geophysics
Zhazha Hu, Shuangfang Lu, Jop Klaver, Jan Dewanckele, Alexandra Amann-Hildenbrand, Garri Gaus, Ralf Littke
Summary: With the development of imaging technology, tools to quantitatively describe pore structure, morphology, and connectivity have been widely applied on low permeable rocks; however, the predictability of permeability remains questionable. Different techniques for the Middle Ordovician Cobourg limestone in Canada are discussed, showing differences in porosities determined by helium pycnometry and BIB-SEM. Connectivity between pores could not be resolved with 3D micro-CT or FIB-SEM reconstructions.
Article
Geochemistry & Geophysics
Yue Wang, Steffen Nolte, Garri Gaus, Zhiguo Tian, Alexandra Amann-Hildenbrand, Bernhard Krooss, Moran Wang
Summary: This paper proposes an early-time solution for permeability evaluation in pulse-decay tests and validates it on shale samples. The solution accurately evaluates the permeability coefficient through pressure transients during the early-time stage.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geosciences, Multidisciplinary
Garri Gaus, Eva-Maria Hoyer, Timo Seemann, Reinhard Fink, Florian Amann, Ralf Littke
Summary: This study investigates the potential effects of diagenesis on permeability, pore space, and unconfined compressive strength in organic-lean mudstones that have undergone different maximum burial depths. The results show that permeabilities and porosities significantly decrease up to a maximum burial depth of approximately 2,500 m, while further burial to 3,600 m has negligible impact on these properties. The findings provide important insights into the physical properties of mudstones and their relevance in oil and gas exploration and development.
ZEITSCHRIFT DER DEUTSCHEN GESELLSCHAFT FUR GEOWISSENSCHAFTEN
(2022)
Article
Geosciences, Multidisciplinary
S. Grohmann, R. Littke, I. Abu-Mahfouz, G. Gaus, J. Klaver, N. Thuens, P. Schulte, T. Patzek, V. Vahrenkamp
Summary: This study provides a detailed investigation of the geochemical and petrographic characteristics of Upper Cretaceous Jordan Oil Shale (JOS). The JOS contains high amounts of organic matter, carbonates, and variable biogenic SiO2. The organic matter shows oil-prone characteristics, and the JOS is similar to other organic-rich rocks in the Eastern Mediterranean. The preservation of organic matter in the JOS was influenced by Late Cretaceous upwelling events and oxygen depletion in isolated sub-basins. The JOS has the potential for oil shale retorting due to its significant hydrocarbon content.
MARINE AND PETROLEUM GEOLOGY
(2023)
Proceedings Paper
Engineering, Multidisciplinary
Reinhard Fink, Garri Gaus, Bernhard M. Krooss, Yves Gensterblum, Alexandra Amann-Hildenbrand
POROMECHANICS VI: PROCEEDINGS OF THE SIXTH BIOT CONFERENCE ON POROMECHANICS
(2017)