Article
Environmental Sciences
Sabine S. Lange, Lalita Shrestha, Nnamdi Nnoli, Stanley Aniagu, Swati Rawat, Darrell McCant
Summary: Starting from 2008, the expansion of oil and natural gas production in Texas caused concern about its impact on air quality, particularly in the Dallas-Fort Worth metroplex. Through analyzing 6-12 years of hourly air monitoring data from 15 sites, it was found that the concentrations of lighter alkane hydrocarbons were most affected by the number of gas wells, while heavier alkane concentrations were influenced by condensate production and urbanicity. The study also showed that the levels of organic compounds did not exceed the air monitoring values for human health or odor based on comparisons with Texas standards.
ENVIRONMENT INTERNATIONAL
(2023)
Article
Multidisciplinary Sciences
Shengling Jiang, Qinghua Zhou, Yanju Li, Rili Yang
Summary: This paper discusses the fracability of shale reservoirs in the HD1 well through various methods. The results show that the Gufeng-Dalong Formation in the well has organic-rich shale, favorable for fracture development. However, the presence of shale bedding fractures has a negative impact on fracture generation and should be considered in fracturing design.
SCIENTIFIC REPORTS
(2023)
Article
Economics
Drew R. Michanowicz, Jonathan J. Buonocore, Katherine E. Konschnik, Shaun A. Goho, Aaron S. Bernstein
Summary: The study found that Act 13 did not significantly change the layout of unconventional natural gas wells in relation to nearby buildings. The incidents of setback violations after Act 13 were likely due to existing well pad exemptions and factors such as landowner consent, rather than new building construction.
Article
Energy & Fuels
Zhijun Jin, Haikuan Nie
Summary: This study analyzed the shale gas reservoirs in the Sichuan Basin and explored the factors influencing the source and cap rocks, evolution history, and differential enrichment. The research revealed the characteristics of different types of reservoirs and provided valuable guidance for shale gas development.
Article
Chemistry, Multidisciplinary
Xiaoming Li, Xuan Tang, Shaobin Guo, Jinchuan Zhang, Ende Deng, Chaoli Lan
Summary: This study conducted a detailed survey of the outcrop and drill cores in the western Guizhou region to examine the distribution and geochemical characteristics of the Longtan Formation. The results showed that the shale in the Longtan Formation has a significant amount of total organic carbon and is mainly composed of vitrinite, clay minerals, and brittle minerals. The study identified eight types of lithofacies and six lithofacies assemblages, representing different sedimentary environments. The sedimentary model of the Longtan Formation in western Guizhou was predominantly deltaic and tidal flat systems.
Article
Geochemistry & Geophysics
Xiaofei Shang, Huawei Zhao, Shengxiang Long, Taizhong Duan
Summary: The proposed integrated geological modeling workflow for shale gas reservoirs includes four types of models that interact and constrain each other, effectively integrating multisource data and addressing issues such as model optimization and uncertainty evaluation. This systematic approach allows for a more comprehensive analysis of reservoir development and optimization of production systems, with potential for breakthroughs in modeling algorithms and techniques.
Article
Multidisciplinary Sciences
Hop Nguyen Van, Hung Nguyen Viet, Kien Truong Trung, Phong Nguyen Hai, Chau Nguyen Dang Giang
Summary: This study proposed a novel procedure of Water Quality Index (WQI) development based on available monitoring data, and applied it to the Huong river. The results showed that this new method is more suitable for river quality assessment.
Article
Geochemistry & Geophysics
Ang Li, Liyan Zhang, Jianguo Yang, Shichao Li, Fei Xiao, Yulai Yao, Yiming Huang, Bo Liu, Longsheng Li
Summary: This paper presents an anisotropy petrophysical model for organic shale in the Qingshankou formation of Sanzhao sag, based on the petrological and microstructure characteristics of shale. The model was constructed using the Voigt-Reuss-Hill average model, an anisotropy self-consistent approximation+differential effective medium model, and simulated the layering of clay and kerogen. The effects of organic volume fraction, porosity, and pore aspect ratio on rock elastic properties were discussed, and the optimized elastic parameters were used to construct a seismic petrophysical cross-plot template with core calibration.
Review
Engineering, Environmental
Ryan Haggerty, Jianxin Sun, Hongfeng Yu, Yusong Li
Summary: This review assesses the development of machine learning techniques in predicting groundwater quality over the past two decades. It evaluates the application of various supervised, semi-supervised, unsupervised, and ensemble ML models, with neural networks being the most widely used. The usage of neural networks has decreased in recent years, leading to the emergence of more accurate or advanced techniques like deep learning or unsupervised algorithms. Iran and the United States lead in the number of modeled areas, with extensive historical data available. Future advancements include further implementation of deep learning, explainable artificial intelligence, and other cutting-edge techniques, as well as modeling of sparsely studied variables and unique study areas, and the application of ML techniques for groundwater quality management.
Article
Geochemistry & Geophysics
Xuewei Ning, Robert Ewing, Qinhong Hu, Qiming Wang, Xiaoming Zhang
Summary: The imbibition experiment is an effective method for measuring petrophysical properties of porous media, but there are limitations in the existing models. By performing experiments and numerical simulations on fractured shale samples, this study found that the direction of fractures impacts the imbibition rate, and fracture parameters and connectivity between neighboring grid cells are key factors for imbibition rate.
Article
Geosciences, Multidisciplinary
Ayyaz Mustafa, Zeeshan Tariq, Abdulazeez Abdulraheem, Mohamed Mahmoud, Shams Kalam, Rizwan Ahmed Khan
Summary: This study develops a predictive model for the rock brittleness index (BI) using a machine learning approach and well-log data. The proposed model outperforms traditional models in terms of accuracy and provides more accurate predictions of the brittleness index in shale reservoirs.
Article
Geochemistry & Geophysics
Zhiming Hu, Xianggang Duan, Nan Shao, Yingying Xu, Jin Chang, Rui Shen, Xueke Chen
Summary: The study revealed that the gas occurrence state is the main factor causing differences in pressure drop rate and gas production law among shale, coal, and tight sandstone. During the early stage of shale gas development, free gas is mainly produced; the final contribution of free gas production can reach more than 90%. Static desorption and dynamic experiments confirmed that the critical desorption pressure of adsorbed gas is generally between 12 and 15 MPa.
Article
Chemistry, Multidisciplinary
Yue Cui, Xizhe Li, Lingling Han, Yong Feng, Wei Guo, Wei Lin, Chao Qian, Tao Feng
Summary: This study selected shale fracture veins and fluid inclusion assemblages from three wells in the Yuxi Region, southern Sichuan Basin to reconstruct the burial and thermal histories and understand the time-temperature-pressure of oil and gas filling. The results provide a basis for further research on the genesis of overpressure and the migration of shale gas.
Review
Geosciences, Multidisciplinary
Tareq Mohammed Al-Shami, Shiferaw Regassa Jufar, Sunil Kumar, Hesham Abdulelah, Mohammed Bashir Abdullahi, Sameer Al-Hajri, Berihun Mamo Negash
Summary: Interwell interference in shale reservoir development is a common issue causing declines in productivity, especially when multi-branch horizontal infill wells are used. This review provides comprehensive insights into the causes, forms, monitoring methods, and mitigation techniques of interwell interference. Numerical approaches are also explained to understand the fluid flow and geomechanics involved. Future research needs are discussed to address current challenges.
EARTH-SCIENCE REVIEWS
(2023)
Review
Environmental Sciences
Rabeea Noor, Aarish Maqsood, Azhar Baig, Chaitanya B. Pande, Syeda Mishal Zahra, Abu Saad, Mariyam Anwar, Sudhir Kumar Singh
Summary: Pakistan is facing severe water pollution issues, with contaminated drinking water and violation of recommended parameters by the WHO. This review focuses on Pakistan river water pollution, major sources of pollution, and health issues caused by microbial contamination and heavy metal pollution. The findings highlight the increasing water pollution and health issues in urban cities, stressing the need for urgent measures and advanced strategies to ensure clean and safe water.
Editorial Material
Engineering, Environmental
Jesse M. Meik, Brian E. Fontenot, Zacariah L. Hidenbrand, Doug D. Carlton, Jayme L. Walton, Josh T. Taylor, Jonathan B. Thacker, Stephanie Korlie, C. Phillip Shelor, Drew J. Henderson, Akinde F. Kadjo, Corey E. Roelke, Paul Hudak, Taylour Burton, Hanadi Rifai, Kevin A. Schug
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2016)
Article
Chemistry, Analytical
M. Farooq Wahab, Purnendu K. Dasgupta, Akinde F. Kadjo, Daniel W. Armstrong
ANALYTICA CHIMICA ACTA
(2016)
Correction
Environmental Sciences
Zacariah L. Hildenbrand, Doug D. Carlton, Jesse M. Meik, Josh T. Taylor, Brian E. Fontenot, Jayme L. Walton, Drew Henderson, Jonathan B. Thacker, Stephanie Korlie, Colin J. Whyte, Paul F. Hudak, Kevin A. Schug
SCIENCE OF THE TOTAL ENVIRONMENT
(2017)
Article
Environmental Sciences
Zacariah L. Hildenbrand, Doug D. Carlton, Jesse M. Meik, Josh T. Taylor, Brian E. Fontenot, Jayme L. Walton, Drew Henderson, Jonathan B. Thacker, Stephanie Korlie, Colin J. Whyte, Paul F. Hudak, Kevin A. Schug
SCIENCE OF THE TOTAL ENVIRONMENT
(2017)
Article
Biochemical Research Methods
Jonathan B. Thacker, Kevin A. Schug
RAPID COMMUNICATIONS IN MASS SPECTROMETRY
(2018)
Article
Chemistry, Analytical
Phitchan Sricharoen, Nunticha Limchoowong, Charles Phillip Shelor, Purnendu K. Dasgupta
ANALYTICAL CHEMISTRY
(2019)
Article
Chemistry, Analytical
Purnendu K. Dasgupta, Chuchu Qin, Charles Phillip Shelor, Akinde Florence Kadjo, Jianzhong Su, Karsten G. Kraiczek, Graham D. Marshall
ANALYTICAL CHEMISTRY
(2019)
Article
Chemistry, Analytical
Bikash Chouhan, Charles Phillip Shelor, Weixiong Huang, Yongjing Chen, Purnendu K. Dasgupta
ANALYTICAL CHEMISTRY
(2020)
Article
Chemistry, Analytical
Akinde F. Kadjo, Purnendu K. Dasgupta, Charles Phillip Shelor
ANALYTICAL CHEMISTRY
(2020)
Article
Chemistry, Analytical
Akinde F. Kadjo, Purnendu K. Dasgupta, Kannan Srinivasan
Summary: Chromatography is used for separating analytes in mixtures. Retention time is commonly used for identification, but reliance solely on this may not be prudent. The authors propose using a sameness threshold based on numerical comparison of chromatographic peak shapes for identification confirmation.
ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Analytical
Charles Phillip Shelor, Kenji Yoshikawa, Purnendu K. Dasgupta
Summary: Universal detectors in liquid chromatography, such as mass spectrometry, need the chromatographic eluent to be completely volatilized before processing the analytes further. Separation of biomolecules in mostly aqueous media with compatible pH and ionic strength is necessary for their biological activity to survive the process. Combinations of ammonia with acetic and formic acids are commonly used as eluent for this purpose with relatively low tolerated concentrations.
ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Analytical
Shin-Ichi Ohira, Yuka Sato, Kazuki Horiuchi, Charles Phillip Shelor, Kei Toda
Summary: A fast response potentiometric flow-through pH sensor was used for organic acid determination with ammonia permeation device for baseline pH adjustment. By titrating the introduced organic acids, the pH response could be used for theoretical calculation of analyte concentrations. Real sample analysis showed good agreement between the present system and conventional BTB method.
ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Analytical
Charles Phillip Shelor, Michael Donegan
Summary: A membrane-based electrodialytic desalter has been developed for the selective removal of salts from a fluid stream while retaining larger charged molecules. The device uses dialysis membranes paired with ion exchange membranes in a planar configuration to prevent adsorptive losses. Energy requirements for desalting are higher compared to converting salt into acid or base, and optimal voltage profiles have been investigated.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Enas N. Yousef, Purnendu K. Dasgupta, Seth A. Horn, C. Phillip Shelor, Souvik Roy
Summary: This article introduces methods for measuring the inner diameter of very small capillaries and focuses on the characteristics of synthetic polymer capillaries. The measurements using various methods produce consistent results in determining the average inner diameter. For open tubular liquid chromatography, the variance in bore has little effect on the performance.
ANALYTICA CHIMICA ACTA
(2022)