Article
Energy & Fuels
Zhen Yang, Xiaoli Zhang, Junhui Lu, Yajun Li
Summary: This study analyzes the genetic mechanisms of the low-resistivity gas layers in the southwestern Sulige gas field and proposes an effective method to distinguish these layers from gas-water layers. The research provides a basis for understanding the distribution of gas and water in the field, guiding further exploration and development.
ENERGY SCIENCE & ENGINEERING
(2022)
Article
Chemistry, Physical
Kawthar Adewumi Babatunde, Berihun Mamo Negash, Muhammed Rashik Mojid, Tigabwa Y. Ahmed, Shiferaw Regassa Jufar
Summary: Molecular simulation is widely used in adsorption studies, but realistic modeling and preparation of shale remains a challenge. Existing studies often use single components to represent shale surfaces, lacking the heterogeneity and mineral diversity of actual shale surfaces. The proposed molecular shale model exhibits higher adsorption capacity and surface area, providing a more accurate understanding of adsorption behaviors.
APPLIED SURFACE SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Menglei Li, Chaomo Zhang
Summary: This study aims to improve the evaluation method for shale reservoirs of the Lower Carboniferous Luzhai Formation in the central Guangxi area. By analyzing the impact of low resistivity and complex mineral composition on logging response, a series of improved methods were proposed to calculate reservoir parameters. Experimental results show that these methods significantly improve prediction accuracy and are highly consistent with core analysis results.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Yu Liu, Chi Su, Fuhua Shang
Summary: This study directly images micropores smaller than 2 nm in kerogen using AC-STEM with SED and constructs a 3D kerogen molecular model to investigate the relationship between micropores and kerogen molecules. The study finds that micropores are widely distributed on the surface of kerogen and correlates with the results of gas adsorption experiments. This research is important for a better understanding of shale gas storage.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Energy & Fuels
Wenrui Shi, Zhansong Zhang, Zisang Huang, Shu Jiang, Jincai Shen, Aiguo Feng, Hongyan Zhao, Jun Xing
Summary: This study established two nonresistivity gas saturation models based on dipole array acoustic/conventional logging parameters and total organic carbon (TOC) to address the issue of inaccurate gas saturation values in low-resistivity shale gas reservoirs in the Fuling area. The models were verified to have higher accuracy than the Archie-type resistivity model and show potential for wider applications.
Article
Geosciences, Multidisciplinary
Fujing Sun, Jianmeng Sun, Xin Zeng, Weiguo Yuan, Jinyan Zhang, Wei Yan, Weichao Yan
Summary: Accurate gas saturation calculations are critical for evaluating marine shale gas reservoirs. However, it is challenging to calculate gas saturation in shale gas reservoirs due to their complex rock compositions and fluid types. In this study, we analyze the influencing factors of electrical properties and develop a new method to calculate shale gas saturation. The results show that the new method has higher accuracy compared to other commonly used methods.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Energy & Fuels
Lin-Qi Zhu, Jin Sun, Xue-Qing Zhou, Qing-Ping Li, Qi Fan, Song-Lin Wu, Shi-Guo Wu
Summary: This study explored the clay content, porosity, saturation, and hydrate-enriched layer identification of a logging-based hydrate reservoir using well W8 in the Qiongdongnan Basin. The study found that considering the effect of clay content on log response is necessary in the logging evaluation of hydrate reservoirs.
Article
Energy & Fuels
Norbert P. Szabo, Rafael Valadez-Vergara, Sabuhi Tapdigli, Aja Ugochukwu, Istvan Szabo, Mihaly Dobroka
Summary: A multivariate statistical method based on factor analysis is proposed for quantitatively determining the total organic content of shale formations, offering an effective tool for evaluating organic matter content in unconventional reservoirs.
Article
Energy & Fuels
Liang Huang, Zhengfu Ning, Hao Lin, Wen Zhou, Lu Wang, Jie Zou, Hao Xu
Summary: High-pressure sorption isotherms were measured on shales from Sichuan Basin, China for CH4, C2H6, and their mixtures using a volumetric method. The temperature had a more notable effect on the binary excess sorption isotherms compared to gas composition. C2H6 showed stronger affinity than CH4, with its effect more significant at high pressures and less significant at low pressures.
Article
Energy & Fuels
Saad Alafnan
Summary: This study investigates the impact of supercritical carbon dioxide injection on the geomechanics of kerogen in shale formations. It reveals that the injection of supercritical carbon dioxide alters the mechanical behavior of kerogen, leading to a decrease in ductility under applied stress. This research provides nano-scale insights into the advantages of using supercritical carbon dioxide to degrade the mechanical integrity of organic matters contained in shales, supporting the value of carbon dioxide sequestration in shale formations.
Article
Geosciences, Multidisciplinary
Deependra Pratap Singh, Bodhisatwa Hazra, David A. Wood, Pradeep K. Singh
Summary: This study evaluated Lower Permian Barren Measures Formation shales from two Damodar Valley sub-basins in India to understand the impact of petrographic composition and kerogen type on shale source rock potentiality and reaction kinetics. Different types of kerogen were found to influence the reactivity of shales, with higher thermal maturity levels and type III-IV kerogen-bearing shales displaying lower reactivity. Heat-altered shales with igneous intrusions showed the least reactivity, indicating the significant impact of removing hydrocarbons from shales.
JOURNAL OF ASIAN EARTH SCIENCES
(2021)
Article
Engineering, Ocean
Nura Abdulmumini Yelwa, Khairul Azlan Mustapha, Mimonitu Opuwari, Mohammed Hail Hakimi
Summary: Shale sediments from four Cretaceous stratigraphic units in South Africa's Orange Basin were analyzed to determine their organic-matter characteristics. The results showed that the shale contained moderate amounts of organic matter, mainly Type III kerogen, which has the potential to be developed as a shale gas resource.
MARINE GEORESOURCES & GEOTECHNOLOGY
(2023)
Article
Engineering, Environmental
Saeed Babaei, Hasan Ghasemzadeh, Stephane Tesson
Summary: Accurately predicting gas adsorption in shale gas is crucial for estimating production capacity and optimizing extraction processes. The complex nature of shale reservoirs poses significant challenges in understanding the mechanism of methane adsorption. Through the use of a nanocomposite shale model and hybrid simulations, the study investigates methane adsorption in rigid and flexible shale models under different conditions. The results highlight the influence of factors such as kerogen flexibility, pore width, moisture content, temperature, and pressure on fluid behavior.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Sen Wang, Xinyu Yao, Qihong Feng, Farzam Javadpour, Yuxuan Yang, Qingzhong Xue, Xiaofang Li
Summary: This study investigates the competitive adsorption between CO2 and hydrocarbon components in shales, as well as the recovery mechanisms of CO2 huff-n-puff in kerogenic circular nanopores. The study reveals that different pore geometries and compositions significantly impact gas adsorption and recovery behaviors, highlighting the importance of using realistic shale kerogen models. Additionally, increasing pore size improves gas recovery during pressure drawdown but limits the effectiveness of CO2 injection, leading to an overall increase in gas recovery and CO2 sequestration efficiency.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Geography, Physical
Mu Liu, Changjun Ji, Hewei Hu, Guoqing Xia, Haisheng Yi, Theodore R. Them, Peng Sun, Daizhao Chen
Summary: During the Toarcian Oceanic Anoxic Event, there was a reduction in animal diversity and a resurgence in microbial abundances. Organic geochemical studies in the Quse Formation revealed that kerogen in the shale samples primarily originated from marine photosynthetic species, while maltene represented a mixture of various organisms. Isotopic inversions during the T-OAE interval suggest two phases separated by the nadir of carbon isotopes: early N-CIE and late N-CIE.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Energy & Fuels
Behnam Esmaeili, Hossein Rahimpour-Bonab, Ali Kadkhodaie, Amir Ahmadi, Sirous Hosseinzadeh
Summary: Determining the potential of reservoirs and production zones using appropriate saturation-height functions and water saturation is crucial for improving product performance and reducing recovery costs. This study divided the reservoir into different rock types and estimated water saturation using various methods. By using reservoir quality index and water saturation profile, the production zones were delineated. The saturated-height functions were chosen for each rock type and fitted to the representative pressure curves, allowing the estimation of saturations in unreachable zones.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Polymer Science
Farzad Pashapouryeganeh, Ghasem Zargar, Ahmad Rabiee, Ali Kadkhodaie, Mohammad Ali Takassi
Summary: Synthetic water-soluble polymers, such as partially hydrolyzed polyacrylamide (HPAM), are commonly used in enhanced oil recovery and drilling fluid operations. However, they have low thermal stability and mechanical resistance. This research focuses on synthesizing a nanocomposite by adding nano-alumina particles to improve the properties of the polymer. The results show that the nanocomposite with 0.2 wt% nano-alumina has high rheological behavior.
Article
Environmental Sciences
Aziz Abdolahi, Ali Chehrazi, Ali Kadkhodaie, Seyedmohsen Seyedali
Summary: This study examines the Ghar Member, the most productive zone in the Oligo-Miocene-aged Asmari Formation in Iran's Hendijan Field, through petrophysical and seismic analyses, flow unit analysis, and facies modeling. It identifies the Ghar sand as the best interval within the Asmari Formation, equivalent to HFU-2 and HFU-4 in terms of reservoir quality.
MODELING EARTH SYSTEMS AND ENVIRONMENT
(2023)
Article
Geology
Mohammad Derafshi, Ali Kadkhodaie, Hossain Rahimpour-Bonab, Rahim Kadkhodaie-Ilkhchi, Hamid Moslman-Nejad, Amir Ahmadi
Summary: Detecting and understanding pore types and geometries in porous media is essential for mapping reservoir properties. This study used velocity deviation logs and capillary pressure curves to estimate pore system properties of the Fahliyan Formation. Petrographic studies and velocity log calculations identified different pore types and their distribution in the reservoir. The results indicate that diagenesis plays a significant role in developing complex pore types and determining reservoir quality.
CARBONATES AND EVAPORITES
(2023)
Article
Engineering, Manufacturing
Amin Abdollahzadeh, Behrouz Bagheri, Ali Shamsipur
Summary: A joint of aluminum to copper sheets was successfully achieved by friction stir spot welding with a nanoparticle interlayer. The introduction of nanoparticles improved the microstructure and interface characteristics of the joints. Moreover, the use of nanoparticles decreased the thickness of the intermetallic compound layer in the bond interface and resulted in higher mechanical properties of the welded samples.
MATERIALS AND MANUFACTURING PROCESSES
(2023)
Article
Energy & Fuels
Sirous Hosseinzadeh, Ali Kadkhodaie, David A. Wood, Reza Rezaee, Rahim Kadkhodaie
Summary: Understanding the fracture patterns in hydrocarbon reservoirs influenced by plate collision is crucial in the Zagros area of Iran. In this study, an integrated workflow was used to assess the impact of various fracture sets on heterogeneous carbonate reservoir rocks. The results indicate that secondary permeability significantly affects well productivity.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2023)
Article
Energy & Fuels
Afzal Mir, Muhammad Rustam Khan, Ali Wahid, Muhammad Atif Iqbal, Reza Rezaee, Syed Haroon Ali, Yucel Deniz Erdal
Summary: This study analyzed the petroleum system of the Bannu Basin in Pakistan, a foreland basin of the Himalayan fold and thrust belts. The study divided the area into three zones and integrated seismic and well log data. The results showed higher sedimentation levels and abrupt sedimentation due to Himalayan orogeny. Potential source rocks and local faults were identified as potential traps for hydrocarbon preservation. Specific formations were identified as potential reservoir rocks in different zones. Post-Miocene sedimentation was found to be a significant event for hydrocarbon generation and accumulation.
Article
Environmental Sciences
Asghar Asghari Moghaddam, Soraya Nouri Sangarab, Ali Kadkhodaie Ilkhchi
Summary: By modifying the DRASTIC method and integrating the fuzzy knowledge, the DRASTICL model was developed to map vulnerable areas and pollution index, providing a basis for preventing groundwater pollution.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2023)
Article
Geosciences, Multidisciplinary
Mostafa Sabouhi, Reza Moussavi-Harami, Ali Kadkhodaie, Payman Rezaee, Mahmoud Jalali, David A. Wood
Summary: This study provides a detailed analysis of the relationships between stratigraphic features and heterogeneities in carbonate reservoirs, emphasizing their importance for petroleum geologists. The findings highlight the impact of these stratigraphic features on reservoir characteristics, emphasizing their significance at regional and local scales for heterogeneity.
JOURNAL OF ASIAN EARTH SCIENCES
(2023)
Article
Geosciences, Multidisciplinary
Aziz Abdolahi, Mohammad Bahrehvar, Ali Chehrazi, Ali Kadkhodaie, David A. Wood
Summary: This study divides the Asmari Formation into six depositional sequences and develops 3D reservoir-property models. The high-permeability zones are associated with AS-4 and AS-5, which consist of grain-supported lithologies related to shoal facies. The lower-quality reservoir is seen in the supratidal, intertidal, and lagoonal facies of AS-2.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Hassan Valinasab, Behzad Soltani, Hamid Hassanzadeh, Ali Kadkhodaie, Maziyar Nazemi, Ebrahim Abdolahi
Summary: This study integrates well data, seismic data, and literature to establish a seismic stratigraphic-based sedimentary conceptual model of the Berriasian-Early Valanginian Lower Fahliyan Formation in the northwestern Persian Gulf. Three depositional sequences were identified based on facies changes, depositional geometries, and fossil assemblages. Tectonic activities and sea-level changes controlled the sedimentation of the depositional sequences. It was concluded that the Lower Fahliyan Formation was deposited in the inner to outer settings of a carbonate shelf.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Energy & Fuels
Amir Mazdarani, Ali Kadkhodaie, David A. Wood, Zohreh Soluki
Summary: This study focuses on the role of natural fractures in reservoir quality using image logs and conventional well logs. The interpretation of image logs reveals various natural structures and their relationships with reservoir characteristics. The relationship between fracture frequency and permeability shows that high permeability zones are correlated with high frequencies of open and vuggy fractures, which is important for optimizing reservoir development and resource recovery.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2023)
Article
Energy & Fuels
Faramarz Talaie, Ali Kadkhodaie, Mehran Arian, Mohsen Aleali
Summary: This study analyzes the geochemical characteristics and interrelationships of the Cenomanian Sarvak oil reservoirs in the Persian Gulf basin. The research classifies the Sarvak oil samples and investigates the causes of genetic differences in oil families. The findings show that the oils in the Persian Gulf basin originate from different source rocks, and the thermal maturity and source rock locations vary among the oil families.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2023)
Article
Energy & Fuels
Ahmad Azadivash, Hosseinali Soleymani, Ali Kadkhodaie, Farshid Yahyaee, Ahmad Reza Rabbani
Summary: This study utilized machine learning techniques to predict key parameters such as Organic Oxygen Index (OI), Hydrogen Index (HI), and kerogen type using petrophysical log data of a well in the Perth Basin. Six machine learning algorithms were used to predict OI and HI, with the Support Vector Machines method performing the best. Additionally, six classifiers were employed to determine kerogen types, and the Gradient Boosting method achieved the highest accuracy. The study concludes that machine learning methodologies, in combination with petrophysical logs, offer an efficient and accurate alternative for characterizing kerogen type and evaluating source rock.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2023)
Article
Engineering, Multidisciplinary
Zahra Sadeqi-Arani, Ali Kadkhodaie
Summary: With the emergence of Artificial Intelligence and Machine Learning, the petroleum industry has made significant progress in optimizing decision making, time, and costs. This research analyzes bibliometric studies to provide an overview of the application of AI and machine learning in the upstream sector of the petroleum industry. The results show exponential growth in this field, with China, Iran, and the US being the leading countries in terms of publications. The most influential journal in this field is the 'Journal of Petroleum Science and Engineering', and SALAHELDIN ELKATATNY is the most productive author. The focus of AI and machine learning applications is on predicting and optimizing porosity, well logs, and permeability.
RESULTS IN ENGINEERING
(2023)
