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
Thermodynamics
Huarong Zhang, Sha Wang, Cong Shi, Jinbiao Yan, Xiang Ge, Jun Shen, Bin Chen, Xiumin Jiang, Yun Guo
Summary: TG-FTIR and Py-GC/MS techniques were used to investigate the generation of products and mass loss characteristics of Gonghe oil shale. The results showed that there was a peak of maximum weight loss rate at around 457℃, and there were strong correlations between different functional groups. The secondary reactions of the retorting products played a leading role in the constant temperature section, and 520℃ showed more complete volatilization and desulfurization compared to 470℃. Higher temperatures led to lower content of saturated hydrocarbons and oxygen-containing heteroatom compounds, and higher content of unsaturated hydrocarbons.
THERMOCHIMICA ACTA
(2022)
Article
Energy & Fuels
Hamad Alkharraa, Karl-Heinz Wolf, Abdulrahman Alquraishi, Ridha Al Abdrabalnabi, Mohamed Mahmoud, Pacelli Zitha
Summary: This research evaluates the performance of CO2 injection in tight reservoirs and finds that secondary miscible CO2 injection provides the highest displacement efficiency and oil recovery. NMR analysis findings are in line with core-flood experiments results, showing a strong positive correlation.
Article
Thermodynamics
Xianfu Huang, Ya-Pu Zhao
Summary: Experimental studies reveal the evolution mechanism of the pore structure of oil shale formation rocks after compression, showing that the specific surface area initially increases and then decreases, while the pore size distribution exhibits the opposite trend. The pore volume goes through stages of decrease, increase, and continuous decrease with increasing applied stress, ultimately decreasing by 30% under 700 MPa compression. The fractal dimension of the shale rock increases after compression, indicating a rougher and more heterogeneous pore structure. This research provides guidelines for the rational design of stimulation technologies for improved shale oil and gas recovery and carbon sequestration in deep earth formations.
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
Miao Zhang, Nirjhor Chakraborty, Zuleima T. Karpyn, Hamid Emami-Meybodi, Luis F. Ayala
Summary: This study provides a quantitative analysis of gas transport behavior in ultratight rocks using X-ray computed micro-computed tomography imaging and numerical modeling. The results show that sorption is a non-equilibrium process in ultratight rocks and surface diffusion significantly contributes to total mass transport through nanopores.
Article
Energy & Fuels
Jungang Lu, Liping Zhao, Yong Li, Xiaogang Li, Qingbo He, Zhiwei Ma
Summary: This paper systematically discusses the geochemical characteristics and hydrocarbon generation potential of Benxi Formation coal-bearing source rocks based on the test and analysis of total organic carbon (TOC) content, rock pyrolysis, kerogen stable carbon isotope (δC-13) and vitrinite reflectance (Ro), in order to grasp their exploration prospect.
PETROLEUM SCIENCE AND TECHNOLOGY
(2023)
Article
Geochemistry & Geophysics
Tim Matava, Robert G. Keys, Sverre E. Ohm, Stefano Volterrani
Summary: The study investigates hydrocarbon generation in source rocks using a calibrated rock-physics model to predict P- and S-wave velocities and density. It identifies the increase in porosity as a key indicator of source rock maturity and demonstrates the significant amplitude response of a maturing source rock in seismic data. The research provides insight into kerogen kinetics and reduces exploration risk by correlating seismic response with source rock maturity model.
Article
Chemistry, Analytical
Raquel Marques, Michel Sablier, Jaap J. Boon, Gauthier Rose, Leslie Carlyle, Isabel Pombo Cardoso, Laurence De Viguerie
Summary: This study analyzed brown bitumen oil paint reconstructions based on 19th century production records using thermal chemical analysis methods. It found that the asphalt markers in Trinidad Lake asphalt (TLA) were no longer detectable after heat processing, providing a possible explanation for the lack of evidence in previous studies.
MICROCHEMICAL JOURNAL
(2022)
Article
Energy & Fuels
Guangjie Zhao, Fujie Jiang, Hong Pang, Xingzhou Liu, Chang Chen, Di Chen
Summary: The source rocks in the high-rise area of the Western Depression of the Liaohe Basin have a high hydrocarbon generation potential. The study analyzes the characteristics of source rocks and crude oil, and determines the oil-source correlation. The results show that the crude oil in the Gaosheng area mainly comes from the Es4 source rocks, which have good source rock characteristics and sufficient oil generation potential.
Article
Energy & Fuels
Riza Nurbekova, Natalia Smirnova, Ivan Goncharev, Reinhard F. Sachsenhofer, Randy Hazlett, Gleb Smirnov, Talgat Yensepbayev, Shukhrat Mametov, Milovan Fustic
Summary: The Zaysan Basin in eastern Kazakhstan is a petroliferous basin with oil shale deposits in its upper Carboniferous-Permian sedimentary succession. These oil shale deposits are among the best source rocks in the world, with high total organic carbon contents, extract yields, and ultimate expulsion potential. The basin underwent an evolution from a deep/semi-deep lake to a deltaic setting. The study provides valuable information for petroleum exploration and development in the Zaysan Basin, emphasizing the importance of integrating data sources and weighing contradictory information.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2023)
Article
Chemistry, Applied
Jiaxing Song, Kai Sun, Qunxing Huang
Summary: This study investigated the influence of thermal aging on the pyrolysis oil fuel components of typical waste plastics, showing that the impact varies depending on the type of plastic. After thermal aging, PE and PP exhibited more significant changes in heavy oil fraction compared to light oil and diesel oil fractions, while PVC samples showed structural defects and a color change.
FUEL PROCESSING TECHNOLOGY
(2021)
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
Thermodynamics
Ryan D. Merckel, Mike D. Heydenrych, Bruce B. Sithole
Summary: The study presents an advancement in Py-GC/MS with EGA-MS, allowing prediction of elemental composition and calorific content of pyrolysis products. It reduces the need for other analytical methods and demonstrates the impact of various catalysts on pyrolysis oil. Different dominant mechanisms, changes in elemental composition, and effects on calorific value were observed.
Article
Energy & Fuels
Amer Alanazi, Nurudeen Yekeen, Mujahid Ali, Muhammad Ali, Israa S. Abu-Mahfouz, Alireza Keshavarz, Stefan Iglauer, Hussein Hoteit
Summary: The substitution of fossil fuel with clean hydrogen is a promising route to achieve net zero carbon emissions. However, sufficient underground storage of hydrogen at an industrial scale is necessary due to its low energy density. This study measured the contact angles and interfacial tension between hydrogen, methane, and brine in order to evaluate the potential and efficiency of methane as a cushion gas in underground hydrogen storage.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Penglin Zhang, Qingtao Meng, David Misch, Reinhard F. Sachsenhofer, Zhaojun Liu, Fei Hu, Lin Shen
Summary: Lacustrine oil shale in the Beipiao Basin was characterized by the presence of well-preserved fossils, with organic matter primarily sourced from phytoplankton and aquatic algal-bacterial organisms. High-quality oil shales were deposited under anoxic freshwater conditions, with low terrigenous detrital input, indicating a warm and humid paleoclimate.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Penglin Zhang, David Misch, Qingtao Meng, Achim Bechtel, Reinhard F. Sachsenhofer, Zhaojun Liu, Fuhong Gao, Fei Hu, Shuaihua Zhang, Baiqiang Tang
Summary: The study evaluated the thermal maturity of the Qiangshankou Formation in the Songliao Basin by combining traditional and advanced petrographic and geochemical maturity proxies with clay mineralogical investigations. The vitrinite reflectance trend, supported by changes in clay mineralogy, provided valuable insights for understanding shale oil distribution in the central Songliao Basin. Maturity-related biomarker proxies showed partial validity, with some proxies proving insensitive to changes in maturity from immature to peak oil mature.
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2021)
Article
Geosciences, Multidisciplinary
Penglin Zhang, David Misch, Fei Hu, Nikolaos Kostoglou, Reinhard F. Sachsenhofer, Zhaojun Liu, Qingtao Meng, Achim Bechtel
Summary: The Songliao Basin in Northeastern China is an important hydrocarbon province with a long history of conventional oil and gas production. Unconventional resource estimation, particularly shale oil/gas production from mature source rocks, is becoming increasingly important for regional exploration strategies. A multi-analytical geochemical and porosity study on oil-prone samples from the Qingshankou Formation in the Central Depression revealed a complex relationship between burial compaction, hydrocarbon generation, and pore evolution, highlighting the importance of understanding pore distributions within low-permeable rocks for successful shale oil/gas production.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Sandor Kormos, Reinhard F. Sachsenhofer, Achim Bechtel, Balazs Geza Radovics, Katalin Milota, Felix Schubert
Summary: The Eocene and Lower Oligocene rocks in the Hungarian Palaeogene Basin are identified as potential source rocks for crude oil accumulations. Specifically, the Kosd Formation and Tard Clay Formation are considered high-quality gas and oil-prone source rocks based on Rock-Eval data analysis from borehole samples. The molecular parameters of crude oil samples suggest a shaly source rock deposited in a marine/brackish environment, with organic matter mainly composed of aquatic biomass such as algae, dinoflagellates, and chemoautotrophic bacteria.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geology
Michael A. J. Vitzthum, Hans-Jurgen Gawlick, Reinhard F. Sachsenhofer, Stefan Neumeister
Summary: The Upper Jurassic Lemes Formation in the Adriatic Carbonate Platform is a 450 m-thick organic-rich deep-water sedimentary rocks deposited in the Lemes Basin. The formation was studied using various proxy methods to analyze its bio- and chemostratigraphy, depositional environment, and source rock potential, revealing different units representing different depositional environments and oxygen conditions. The evolution of the Lemes Basin was attributed to tectonic events in the Inner Dinarides, with Unit 2 identified as a prolific oil-prone source rock.
Article
Energy & Fuels
S. Vranjes-Wessely, D. Misch, D. Kiener, M. J. Cordill, N. Frese, A. Beyer, B. Horsfield, C. Wang, R. F. Sachsenhofer
Summary: Nanoindentation is a valuable tool for studying the material properties of complex natural materials like shales and organic matter-rich rocks, but extracting representative material parameters for organic matter can be complicated due to their inherent complexity. A study from the Chinese Songliao Basin extracted hardness and reduced elastic modulus values for over-mature samples, and evaluated influencing factors on the resulting parameters through high-speed nanoindentation mapping and imaging methods. The study showed that the heterogeneity of organic matter significantly affects the data scattering and the mechanical behavior of OM in rock formations.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2021)
Editorial Material
Multidisciplinary Sciences
Shuangbiao Han, Zhiyuan Tang, Chengshan Wang, Brian Horsfield, Tiantian Wang, Nicolaj Mahlstedt
Article
Energy & Fuels
Penglin Zhang, David Misch, Qingtao Meng, Reinhard F. Sachsenhofer, Zhaojun Liu, Jianliang Jia, Fuhong Gao, Achim Bechtel, Fei Hu
Summary: This study investigates the organic matter-rich intervals in the Cretaceous succession of the Songliao Basin in northeastern China and examines the influences of global and regional factors on organic matter accumulation. The analysis of well logs, drill cores, and geochemical data reveals higher salinity stratification and stronger anoxia in the Southeastern Uplift compared to the Central Depression. The research also suggests that two separate depocenters might have existed during the deposition of the lowermost and most organic-rich sub-unit. The study provides direct evidence that basin segmentation strongly controlled the distribution of organic matter-rich rocks in the Qingshankou Formation.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2022)
Article
Energy & Fuels
Hafidz Noor Fikri, Reinhard F. Sachsenhofer, Achim Bechtel, Doris Gross
Summary: The geological characteristics and accumulation process of three coal seams in the Barito Basin of Borneo were studied. The study found that the composition and geochemical characteristics of coal in these seams showed cyclic variations, possibly influenced by climatic fluctuations.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Stephen Ajuaba, Reinhard F. Sachsenhofer, Achim Bechtel, Francesca Galasso, Doris Gross, David Misch, Elke Schneebeli-Hermann
Summary: The Toarcian oceanic anoxic event in the Southwest German Basin resulted in the accumulation of organic matter-rich sediments. Analysis of carbon isotope records and geochemical indicators revealed the presence of photic zone anoxia and enhanced activity of diazotrophic cyanobacteria during the event. Oxygen-depleted conditions persisted even after the event, albeit with reduced intensity.
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2022)
Article
Geochemistry & Geophysics
Bangjun Liu, Achim Bechtel, Doris Gross, Qiaojing Zhao, Wenmu Guo, Stephen Ajuaba, Yuzhuang Sun, Cunliang Zhao
Summary: Analysis of amber from the Shenbei coalfield in northeastern China provides insights into its origin and palaeobotanical associations, predominantly from gymnosperms. Carbon isotope composition comparisons reveal information about the ancient environment in which the amber formed. Variations in carbon isotope values of compounds suggest differences in amber sources.
ORGANIC GEOCHEMISTRY
(2022)
Article
Chemistry, Physical
Joel P. Bensing, David Misch, Lukas Skerbisch, Reinhard F. Sachsenhofer
Summary: With the potential of underground hydrogen storage (UHS) in depleted oil and gas reservoirs or deep saline aquifers, it is important to understand the changes to geological units caused by the interaction with injected hydrogen. This study reveals significant dissolution of calcite fossil fragments in claystone caprock proxies when treated with hydrogen and NaCl brine, a phenomenon observed for the first time in claystones. These findings highlight the need for hydrogen-specific studies of caprocks in areas proposed for UHS.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Geosciences, Multidisciplinary
Weijiao Ma, Jinbu Li, Min Wang
Summary: The petroleum resource assessment obtained from laboratory tests on old core samples tends to underestimate the in situ resources. This study investigates the hydrocarbon loss and restoration by comparing preserved and exposed core samples. It is found that previous studies have severely underestimated the in situ hydrocarbon potential due to factors such as sample crushing and crucible waiting. A new restoration model is proposed to compensate for these losses.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Shaoyun Chen, Yongqiang Yang, Longwei Qiu, Xiaojuan Wang, Erejep Habilaxim
Summary: Quartz cement is an important authigenic mineral in the tight sandstones of the Shaximiao Formation in the Sichuan Basin. This study analyzed the silicon sources of the quartz cement using mineralogical, fluid inclusion, and geochemical data. The results showed that smectite alteration and dissolution of aluminosilicate minerals were the primary sources of silicon for quartz cementation. Contributions from volcanic material hydrolysis and pressure solution were relatively minor. The presence of chlorite films inhibited the development of quartz overgrowths and had minimal impact on reservoir quality.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Xing Jian, Ping Guan, Ling Fu, Wei Zhang, Xiaotian Shen, Hanjing Fu, Ling Wang
Summary: This study presents a synthesis of new detrital zircon dating results and published data from the Cenozoic Qaidam basin, revealing the spatiotemporal variation of detrital zircon age populations and supporting models of synchronous deformation in northern Tibet. The study emphasizes the importance of considering textural and sedimentological parameters in zircon provenance interpretations, as well as the need for integrated provenance analysis involving other detritus components.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
A. Peketi, G. Sriram, A. Mazumdar, P. Dewangan, A. Zatale, V. Rajurkar, Gayatri Shirodkar, V. Mahale, V. Yatheesh
Summary: This study investigates 13 submarine seamounts in the southern Andaman volcanic arc and observes evidence of hydrothermal activity in one of the seamounts. The evidence includes plumes rich in dissolved gases, live chemosymbiotic organisms, and the deposition of neoforming minerals. These observations suggest the development of a new hydrothermal field in the least explored Andaman Sea.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Yanxian Zhu, Zhiliang He, Xiaowen Guo, Long Li, Sheng He, Jian Gao, Shuangjian Li, Huili Li
Summary: This study investigates the fluid evolution history of the hydrothermal dolomite reservoir in the Middle Permian Maokou Formation in the Sichuan Basin. The results reveal the diagenetic sequences, mineral origins, salinity history, and pressure evolution using various analytical techniques. The findings provide important insights into the gas charge, escape, and preservation conditions of the reservoir.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Rafaella de Carvalho Antunes, Julia Campos Guerrero, Ricardo Jorge Jahnert
Summary: This study presents a detailed sedimentary model and identifies various sedimentary facies associations in the coquina deposits of the Itapema Formation in the offshore pre-salt Buzios Field of the Santos Basin. These facies associations were primarily influenced by waves and currents and reflect a complex depositional system.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Kang Meng, Tongwei Zhang, Deyong Shao, Xiuyan Liu, Hui Song, Heng Peng
Summary: In this study, an integrated method of measuring optical reflectance and Raman spectroscopy is proposed to accurately determine the thermal maturity of Lower Cambrian shales in South China. The results show that this method is reliable and effective, and it has important implications for analyzing overmature shale.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Mohamed A. K. El-Ghali, Olga Shelukhina, Iftikhar Ahmed Abbasi, Mohamed S. H. Moustafa, Osman Salad Hersi, Numair A. Siddiqui, Khalid Al-Ramadan, Abdullah Alqubalee, Abdulwahab Muhammad Bello, Abduljamiu O. Amao
Summary: This study employs an integrated depositional and sequence stratigraphic approach to assess the control of diagenesis on reservoir porosity of a hybrid-energy delta system. The study focuses on the Barik Formation in the Haushi-Huqf region of Central Oman, which represents a highstand system tract of a hybrid-energy delta. The assessments reveal that the reservoir porosity is controlled by various degrees of diagenetic processes, including mechanically infiltrated clays and kaolinitization of silicate grains.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Xiaocan Yu, Chunlian Wang, Hua Huang, Kai Yan
Summary: Oilfield brines are a significant alternative lithium resource. This study investigates the metallogenic characteristics and enrichment process of oilfield brines from the Jianghan Basin, central China using chemical and multi-isotope data. The results suggest that lithium enrichment in these brines is the result of interaction with clastic host rocks and dilution by meteoric water.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Jianghao Qiao, Xiwu Luan, Thanuja D. Raveendrasinghe, Yintao Lu, Guozhang Fan, Xinyuan Wei, Long Jin, Jian Yin, Haozhe Ma, Lushan Jiang
Summary: This study investigates the Tanintharyi passive continental margin in the Andaman Sea and reveals the potential of the Oligocene/Early Miocene carbonate platform in the region as a significant hydrocarbon reservoir. It also examines the influence of changes in sedimentary facies and the tectonic setting of the Andaman Sea on the evolution of pockmarks.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Anastasios Nikitas, Georgios Makrodimitras, Maria V. Triantaphyllou, Nikolaos Pasadakis, Kimon Christanis, Stavros Kalaitzidis, Grigoris Rousakis, Ioannis Panagiotopoulos, Alexandra Gogou, Alexandros Papadopoulos, Efthimios Tartaras, Aristofanis Stefatos
Summary: Due to the lack of deep wells in the broader region, studying mud volcanic deposits can improve the geological understanding of the Mediterranean Ridge. In this study, biostratigraphic and geochemical analyses were performed on mud breccia deposits from five Mud Volcanoes in the central MR. The results indicate the origin of these deposits and provide insights into the source rock potential. Seismic data is also used to determine the distribution of major lithostratigraphic formations.
MARINE AND PETROLEUM GEOLOGY
(2024)