Article
Geosciences, Multidisciplinary
Palma J. Botterell, David W. Houseknecht, Paul G. Lillis, Silvana M. Barbanti, Jeremy E. Dahl, J. Michael Moldowan
Summary: The Arctic Alaska petroleum province is geologically and geochemically complex, with mixed hydrocarbon charge from multiple source rocks and levels of thermal maturity. Biomarker and chemometric statistical analyses reveal that most oils are derived from specific source rocks, but also indicate mixed-oil accumulations with postmature contributions in some cases.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Claire E. Simpson, Christopher D. Arp, Yongwei Sheng, Mark L. Carroll, Benjamin M. Jones, Laurence C. Smith
Summary: Research focused on Pleistocene sand sea lakes in the Arctic Coastal Plain of northern Alaska was conducted to collect in situ bathymetric data for testing 12 model variants for predicting lake depth. Using Landsat-8 Operational Land Imager (OLI) images, lake depth gradients were measured to select and calibrate the most accurate spectral-depth models for each study lake. Integration of bathymetric data with remotely sensed lake surface area allowed for quantification of lake water storage volumes and highlighted the need for additional in situ data to develop a regional model solution.
EARTH SYSTEM SCIENCE DATA
(2021)
Article
Energy & Fuels
Shun Uchida, Yongkoo Seol, Koji Yamamoto
Summary: This study simulates a year-long gas production from a hydrate reservoir and finds that sand mainly comes from the lower portion of the production zone where faster hydrate dissociation occurs. The complex stress transfer caused by the different stiffness and strength of hydrate-bearing sediments and hydrate-free sediments results in shear deformation and sand mobilization. Sand migration has an impact on the gas production rate.
Article
Energy & Fuels
Chihiro Nakajima, Hisanao Ouchi, Machiko Tamaki, Koya Akamine, Mizuki Sato, Satoshi Ohtsuki, Motoyoshi Naiki
Summary: This study demonstrates through uncertainty analysis and parameter sensitivity analysis that reducing the uncertainties of gas relative permeability and residual gas saturation is essential for more reliable numerical simulations and predictions.
Article
Geosciences, Multidisciplinary
W. -L. Hong, T. Pape, C. Schmidt, H. Yao, K. Wallmann, A. Plaza-Faverola, J. W. B. Rae, A. Lepland, S. Bunz, G. Bohrmann
Summary: The seafloor seepage sites along the Vestnesa Ridge off west-Svalbard have been a natural laboratory for studying fluid flow and gas hydrate dynamics. The research conducted in 2016 revealed unique characteristics of gas hydrates, hinting at temperature modification at great depths. Analysis of pore fluid composition also showed the presence of high chloride concentrations, high B/Cl ratios, and isotopic signatures indicating methane supply and decomposition dynamics.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Elias Kassabji
Summary: The analysis of gas hydrates in the field can help to better understand the gas source by studying its impact on sediment gas composition and evaluating variability between different basins.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Furong Tan, Yang Li, Yigui Han, Guochun Zhao, Shiming Liu, Fangpeng Du, Zhiqing Xie, Ping Lu
Summary: This study provides new evidence for biodegradation of petroleum in the South Qilian basin in Northwest China, offering important insights for determining the origin of petroleum and gas hydrates in the region.
JOURNAL OF ASIAN EARTH SCIENCES
(2023)
Article
Geochemistry & Geophysics
L. Li Vigni, C. Cardellini, M. Temovski, A. Ionescu, K. Molnar, L. Palcsu, A. L. Gagliano, S. Cappuzzo, W. D'Alessandro
Summary: Duvalo volcano is a site of anomalous geogenic degassing close to Ohrid (North Macedonia) not related to volcanic activity. The gases at Duvalo mainly consist of CO2, with significant concentrations of H2S and CH4. These gases originate mostly, if not exclusively, in the shallowest part of the crust, and their production is influenced by seismic activity and tectonic structures in the area.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2022)
Article
Economics
Daniel J. Pastor, Bradley T. Ewing
Summary: Alaska's role in US oil production, especially on the North Slope, has been significant. However, there have been limited studies on the prevailing price of crude oil from the North Slope, called the Alaska North Slope West Coast price (ANS). This study provides evidence of mildly explosive behavior in the ANS price relative to consumer price level, Alaska oil production, and oil stocks. The findings indicate that there was mild explosive behavior before and during the 2007-2009 recession, consistent with similar studies on other oil prices during the same period.
Article
Environmental Sciences
Joseph Sedlar, Adele Igel, Hagen Telg
Summary: Research on clear-sky periods at Utqia.gvik, Alaska during a 5-year period revealed that atmospheric processes controlling clear periods are influenced by low-level cloud dissipation and formation events that are impacted by horizontal advection and air mass modification. Aerosol presence, thermodynamic adjustment, and aerosol concentrations are important mechanisms for fog formation during summer.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2021)
Article
Multidisciplinary Sciences
Maria Naumenko-Dezes, Wolfram Kloppmann, Michaela Blessing, Raphael Bondu, Eric C. Gaucher, Bernhard Mayer
Summary: This article presents a study that reveals a previously overlooked source of natural gas in shale formations, which is generated by radiolysis of organic matter. The study shows that radiolytic gas can account for a significant portion of natural gas mixtures in major shale gas plays worldwide. Considering radiolytic gas as an additional component in uranium-bearing shale gas formations can lead to a more accurate determination of the origins of natural gas.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Geology
Richard O. Lease, David W. Houseknecht, Andrew R. C. Kylander-Clark
Summary: Sequence stratigraphy provides a framework for interpreting sedimentary basin evolution. This study uses detrital zircon U-Pb (DZ) dating and seismic mapping to establish a chronostratigraphic framework for the Torok-Nanushuk clinothem of Arctic Alaska. The study reveals the timing and duration of key depositional elements and captures the chronology of a large regressive-transgressive cycle.
Article
Energy & Fuels
Fariborz Goodarzi, N. N. Goodarzi, A. Malachowska
Summary: The sedimentary characteristics and origins of the Lower Carboniferous Emma Fiord Formation oil shale on Devon Island, Arctic Canada were studied, revealing the impact of different sedimentary environments and climatic variations on the shale characteristics.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Hongfei Lai, Yinan Deng, Lu Yang, Jinqiang Liang, Lirong Dai, Ling Li, Yunxin Fang, Laiyan Liu, Zenggui Kuang
Summary: In the Shenhu area of the northern South China Sea, natural gas within uncompacted deep-sea sediments is dominated by microbial methane, which is produced by hydrogenotrophic methanogens in the deeper buried methanogenic zone. The vertical heterogeneity of methane generation potential in the methanogenic zone in the Shenhu area suggests a common phenomenon in marine sediment environments worldwide.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Energy & Fuels
Timothy S. Collett, Margarita Zyrianova, Norihiro Okinaka, Motoi Wakatsuki, Ray Boswell, Scott Marsteller, David Minge, Stephen Crumley, David Itter, Robert Hunter, Ana Garcia-Ceballos, Ge Jin
Summary: The National Energy Technology Laboratory, the Japan Oil, Gas and Metals National Corporation, and the U.S. Geological Survey are conducting a gas hydrate production test in northern Alaska and have completed the drilling of a stratigraphic test well. This well serves both to confirm geological conditions and to monitor future field operations.
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)