Article
Geosciences, Multidisciplinary
Kristoffer Lovstad, Henrik Nygaard Hansen, Jens Jahren
Summary: The Sto Formation is an important reservoir for petroleum exploration in the Norwegian Barents Sea Area. This study reveals the significant role of illitic grain coating in preserving porosity in the formation. The continuity of grain coats determines the effectiveness in reducing quartz cement overgrowth and controlling the porosity. The observed differences in chemical compaction trend between coated and negligible coated intervals may allow for the development of predictive models without expensive petrographic or core plug data.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Jingdong Liu, Cunjian Zhang, Youlu Jiang, Shuai Hou
Summary: The pore structure of ultra-tight reservoirs plays a key role in controlling quality and fluid flow. The relationship between pore types and rock types was identified, with different types of sandstone reservoirs having distinct pore characteristics. High-pressure mercury intrusion and fractal theory were used for quantitative assessment.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geochemistry & Geophysics
Lin Jiang, Wen Zhao, Benjian Zhang, Chao Zheng, Feng Hong, Jiaqing Hao
Summary: This study develops a 3D gas accumulation facility and combines physical experiments and numerical simulations to reveal the mechanism of gas accumulation in tight formations under geological conditions. The results show that the permeability ratio can characterize the heterogeneity of tight reservoirs and that differential permeability affects the migration dynamics of natural gas and the accumulation process. Additionally, the study finds that the permeability ratio is a parameter of practical engineering significance for predicting the sweet spots of gas accumulation in tight formations.
Article
Green & Sustainable Science & Technology
Rayan Khalil
Summary: Grain-size analysis was conducted on fourteen sandstone samples from the Wasia Formation to determine hydrodynamic conditions and depositional environments. The results showed that the lower section is coarse to medium-grained with poor sorting, while the upper section is medium to medium-well-sorted fine-grained. The sediments have a unimodal distribution in the lower section and a bimodal distribution in two beds. The LDF method indicated aeolian, marine, and fluvial environments as the predominant depositional environments.
Article
Energy & Fuels
Mohammed Mashre Atman Ahfaf, Che Aziz Ali, Habibah Jamil, Ekundayo Joseph Adepehin
Summary: This study emphasizes the critical understanding of reservoir pore-system for effective fluid-flow in non-marine sandstone. Results show the dominant role of quartz and the increasing trend of quartz overgrowth with depth. Different types of porosities make up the total porosity in varying proportions, with mainly disconnected pore spaces in the reservoir.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Geosciences, Multidisciplinary
Maximiliano Paz, Luis A. Buatois, M. Gabriela Mangano, Patricio R. Desjardins, Rail Notta, Federico Gonzalez Tomassini, Noelia B. Carmona, Daniel Minisini
Summary: In recent years, there has been growing interest in the recognition and characterization of sedimentary processes in fine-grained successions, largely driven by the importance of unconventional reservoirs. This study provides a detailed sedimentologic analysis of the Vaca Muerta Formation in the Neuque ' n Basin, Argentina, revealing the presence of traction transport structures indicating bottom current activity. The analysis also identifies different facies associations deposited by contour currents in relatively shallow water.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Asghar A. A. D. Hakro, Wenjiao Xiao, Abdul Shakoor Mastoi, Zhen Yan, Muhammad Soomar Samtio, Riaz Hussain Rajper
Summary: The study found that the Oligocene Nari Formation sandstones consist of very fine to fine-grained sediments, moderate sorting, and a unimodal grain size distribution, indicating deposition in a fluvial to shallow marine deltaic environment.
GEOLOGICAL JOURNAL
(2021)
Article
Geosciences, Multidisciplinary
Zhongnan Wang, Xiaorong Luo, Keyu Liu, Yuhong Lei, Likuan Zhang, Ming Cheng, Xiangzeng Wang
Summary: This study investigated the characteristics of mixed wettability in sandstone samples by integrating petrographic, petrophysical, and pore-scale wettability analyses. It was found that oil-free sandstones were generally water-wet, while oil-bearing sandstones exhibited mixed wettability. Different pores within the same sandstone sample displayed different wetting states, with chlorite surfaces becoming oil-wet after being in contact with oil.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geochemistry & Geophysics
Xiaofeng Liu, Xiaodan Guo, Zenglin Hong, Xuping Xue, Shifeng Li
Summary: This study focuses on the pore characteristics of the permeable sand layer of the Zhiluo Formation in the northern part of the Ordos Basin. Various testing methods were used, including ordinary thin sections, cast thin sections, scanning electron microscopy (SEM), mercury intrusion, and physical property analysis. The results show that the Zhiluo Formation sandstone in the study area has complex pore structures, with primary intergranular pores, residual intergranular pores, interstitial micropores, and secondary intergranular pores, feldspar dissolution pores, and rock debris dissolution pores. Pore throat types include variable fault contractions, sheets, curved sheets, and bundle-shaped throats. The pore structure characteristics are mainly influenced by sedimentation and diagenesis, with compaction and cementation affecting the destruction of sandstone pore structures and later dissolution playing a role in improving the pores. Section 1 of the Zhiluo Formation is greatly affected by diagenesis, while section 2 is greatly affected by sedimentation.
Article
Geosciences, Multidisciplinary
Zhenghong Li, Liqiang Zhang, Wenfang Yuan, Xi Chen, Liang Zhang, Mingqiang Li
Summary: The Ahe Formation in the Kuqa Depression of Tarim Basin is characterized by poor reservoir quality and strong heterogeneities. In this study, "diagenetic facies" are introduced and four types are categorized based on reservoir spaces, diagenetic minerals, and diagenesis. Petrophysical characteristics are summarized, and it is found that dissolution facies and microfracture facies have higher porosities and permeabilities. Principal component analysis (PCA), linear discriminant analysis (LDA), and back propagation neural networks (BPNN) are compared for diagenetic facies identification, with BPNN achieving the highest accuracy. The trained BPNN model is effective for diagenetic facies identification based on conventional well logs.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Jingdong Liu, Lei Li, Cunjian Zhang, Youlu Jiang, Rudy Swennen, Chengjin Zhao, Shuai Hou
Summary: This study investigates the pore structure and fluid flow behavior in tight sandstone reservoirs of the Upper Triassic Xujiahe Formation in the northern Sichuan Basin. Different types of sandstones possess different pore-throat systems, with clay mineral-related pores and throats being the key factors affecting the pore structure and fluid flow behavior. The findings provide valuable insights for reservoir characterization and development.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Andrew D. La Croix, Kasia Sobczak, Joan S. Esterle, Valeria Bianchi, Jiahao Wang, Jianhua He, Phil Hayes, Jim R. Underschultz, Andrew Garnett
Summary: This study focuses on the Precipice Sandstone and Evergreen Formation in the Great Artesian Basin (GAB) in eastern Australia. By integrating palynostratigraphic and zircon geochronologic data, the researchers were able to better constrain the depositional ages of these formations and revise the stratigraphic framework. This new age-context is important for future correlation studies between different basins and paleocontinents.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geography, Physical
Haichao Xie, Jie Liang, Richard S. Vachula, James M. Russell, Shengqian Chen, Mengjing Guo, Xin Wang, Xiaozhong Huang, Fahu Chen
Summary: This study presents a record of Holocene lake hydrodynamic intensity based on sediment analysis from Bosten Lake in arid central Asia. The results suggest that changes in lake hydrodynamic intensity were mainly controlled by temperature or precipitation, influencing human settlement and cultural development in the region.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Geology
Tianfu Zhang, Xianyu Cheng, Shaoyi Wang, Peisen Miao, Cong Ao
Summary: This study reveals the importance of the Middle Jurassic to Early Cretaceous paleoenvironmental evolution and its impact on uranium enrichment in the Ordos Basin through sediment analysis.
ORE GEOLOGY REVIEWS
(2022)
Article
Chemistry, Applied
Jihua Zhang, Chi Zhang
Summary: This study investigates the natural gas accumulation and enrichment conditions and rules in the Upper Paleozoic tight sandstone in Hangjinqi area in the north of Ordos Basin, and predicts favorable exploration areas. The results provide theoretical support for natural gas exploration in the study area.
ADSORPTION SCIENCE & TECHNOLOGY
(2022)
Article
Energy & Fuels
Mingming Zhang, Zhao Li
Article
Energy & Fuels
Mingming Zhan, Zhao Li
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2018)
Article
Geosciences, Multidisciplinary
M. M. Zhang, Y. P. Wang
AUSTRALIAN JOURNAL OF EARTH SCIENCES
(2019)
Article
Geography, Physical
Mingming Zhang, Zhaojun Bu, Ming Jiang, Shengzhong Wang, Shasha Liu, Qing Jin, Penghan Shi
QUATERNARY SCIENCE REVIEWS
(2019)
Article
Environmental Sciences
Mingming Zhang, Zhaojun Bu, Ming Jiang, Shengzhong Wang, Shasha Liu, Xu Chen, Jianing Hao, Wanyue Liao
SCIENCE OF THE TOTAL ENVIRONMENT
(2019)
Review
Geosciences, Multidisciplinary
Mingming Zhang, Zhaojun Bu, Shengzhong Wang, Ming Jiang
EARTH-SCIENCE REVIEWS
(2020)
Article
Geosciences, Multidisciplinary
Jin-Ze Ma, Xu Chen, Azim U. Mallik, Zhao-Jun Bu, Ming-Ming Zhang, Sheng-Zhong Wang, Sebastian Sundberg
FRONTIERS IN EARTH SCIENCE
(2020)
Article
Geography, Physical
Mingming Zhang, Zhaojun Bu, Shasha Liu, Jie Chen, Yaxin Cui, Xu Chen
EARTH SURFACE PROCESSES AND LANDFORMS
(2020)
Article
Environmental Sciences
Ling-Zhi Wang, Lu Feng, Zhao-Jun Bu, Sebastian Sundberg, Mingming Zhang, Xu Chen, Yun-He Yang, Xiao-Ya Yu, Wen-Jing Liu
WETLANDS ECOLOGY AND MANAGEMENT
(2020)
Article
Plant Sciences
Yong-Da Chen, Angela Moles, Zhao-Jun Bu, Ming-Ming Zhang, Zu-Cheng Wang, Hong-Yan Zhao
Summary: The experiment found that when bryophytes are grazed by herbivores, they increase their total phenolics and C:N ratio, while reducing biomass production and height increment. A negative relationship between growth and defense was found in Sphagnum magellanicum and S. fuscum, indicating a species-specific trade-off between growth and defense.
AMERICAN JOURNAL OF BOTANY
(2021)
Article
Geosciences, Multidisciplinary
Mingming Zhang, Zhaojun Bu, Shasha Liu, Jie Chen, Yaxin Cui
Summary: The Hani peatland in Northeast Asia underwent wet, moderate moisture, and dry conditions over the past 7766 years, with corresponding changes in vegetation and hydrology. These changes were primarily influenced by solar irradiation and ENSO activity.
Article
Environmental Sciences
Mingming Zhang, Zhaojun Bu, Hongkai Li, Shasha Liu, Jie Chen, Yaxin Cui
Summary: The study reconstructed hydrological dynamics over the past 700 years in Northeast Asia using samples from the Hani peatland in the Changbai Mountains, revealing wetter conditions from 1300-1700 AD, dry conditions from 1700-1850 AD, and wet conditions from 1850-2018 AD. The driving mechanisms for these hydrological variations were identified as La Nina-like conditions, volcanic aerosol effects, and El Nino-like conditions. The results suggest that solar activity and sunspot cycles may control the hydrological dynamics in Northeast Asia on a decadal-centennial scale.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Geosciences, Multidisciplinary
Mingming Zhang, Zhaojun Bu, Xingan Wang, Pan He, Jie Chen, Yaxin Cui
Summary: The recently discovered macro-tephra layer buried in the Yueliangwan peatland in Northeast China is found to be the product of Changbaishan Millennium eruption. This buried tephra layer serves as a key isochronous marker horizon for the chronological framework in sedimentary contexts across Northeast Asia, providing insights into the eruptive sequence of Changbaishan Millennium eruption. This study highlights the significance of investigating buried tephra in peatlands around active volcanoes for the reconstruction of volcanic eruption history.
Article
Geosciences, Multidisciplinary
Mingming Zhang, John P. Smol, Zhaojun Bu
Summary: The late Holocene tephrostratigraphic sequence of the Changbaishan volcanic field in Northeast China is well preserved in the Dongfanghong peatland, with four tephra layers identified. These tephra layers serve as important chronological markers in sedimentary contexts across Northeast Asia and provide essential historic eruptive information of the Changbaishan volcanic field. The study also highlights the significant potential of peatlands developed on volcanic fields in tephrostratigraphic sequence reconstructions.
Article
Energy & Fuels
Mingming Zhang, Zhao Li
