Article
Engineering, Petroleum
Hao Zhang, James J. Sheng
Summary: This article proposes a novel framework for optimizing the hydraulically fractured well in shale-gas reservoirs with geological uncertainty. It also introduces a hybrid multiobjective particle-swarm optimization algorithm and a Gaussian-process Kriging model as a surrogate model. By applying these methods, the efficiency and accuracy of hydraulic fracturing design can be improved.
Article
Environmental Sciences
Anaiz Gul Fareed, Asif Hussain Khoja, Fabio De Felice, Antonella Petrillo, Muhammad Arsalan Sultan, Zafar Khan Jalalzai, Syed Sheraz Daood
Summary: This study evaluates the storage potential of CO2 in depleted oil fields and examines the effects of CO2 injection on reservoir pressure maintenance and oil and gas recovery. The results show that the selected CO2 injection site has significant storage potential and improves gas recovery, while also impacting reservoir pressure maintenance.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Thermodynamics
Kai Zhang, Hon Chung Lau
Summary: The study investigates the feasibility of storing CO2 inside hydrate stability zone (HSZ) through reservoir pressure management via water producers and CO2 injectors. Results show that by controlling reservoir pressure, CO2 can be stored in HSZ with the formation of CO2 hydrate delaying CO2 breakthrough and limiting gas leakage. The research highlights the potential of storing CO2 in aquifers with a HSZ, with implications for CO2 geological storage.
Review
Engineering, Chemical
Xiang Sun, Anran Shang, Peng Wu, Tao Liu, Yanghui Li
Summary: CO2 marine geological sequestration is a crucial measure to reduce atmospheric CO2 levels and mitigate the harmful effects of global warming. Compared with traditional terrestrial geological sequestration, CO2 marine geological sequestration has greater potential, a safer distance from aquifers, and stable temperature and pressure conditions, making it safer and more efficient. This paper reviews and evaluates the main CO2 marine geological sequestration technologies and discusses their mechanisms, potential, challenges, and adverse effects on marine environments. The potential development trends in CO2 marine geological technology are also explored.
Article
Computer Science, Interdisciplinary Applications
Junpeng Zou, Yu-Yong Jiao, Fei Tan, Jiahe Lv, Qiangyong Zhang
Summary: The distribution and cementation strength of pre-existing natural fractures significantly affect the formation of complex hydraulic fracture networks, and hydraulic fracture branches both restrict fracture length development and promote the formation of complex networks.
COMPUTERS AND GEOTECHNICS
(2021)
Article
Energy & Fuels
Jian-Chun Xu, Wen-Xin Zhou, Hang-Yu Li
Summary: Naturally fractured reservoirs play a crucial role in global oil and gas reserves and production. To optimize the development of these reservoirs, researchers propose an optimization workflow by integrating optimization methods with the embedded discrete fracture model (EDFM). Their study demonstrates the effectiveness of this workflow in finding the optimal well controls and improving the economic efficiency of fractured reservoir development.
Article
Mechanics
Heqian Zhao, Kan Wu, Zhongwei Huang, Zhengming Xu, Huaizhong Shi, Haizhu Wang
Summary: Hydraulic fracturing has become a crucial technology for unconventional oil and gas development. CO2 fracturing shows advantages in shale gas exploitation due to its ability to activate more natural fractures in reservoirs. The study establishes a CO2 fracturing model in naturally fractured reservoirs and demonstrates its effectiveness in creating longer, narrower fractures and connecting more natural fractures to stimulate a larger reservoir volume. Additionally, natural fracture spacing and length significantly impact the distribution and connectivity of natural fractures in CO2 fracturing.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Mechanics
Heqian Zhao, Kan Wu, Zhongwei Huang, Zhengming Xu, Huaizhong Shi, Haizhu Wang
Summary: CO2 fracturing shows better effectiveness and efficiency in naturally fractured reservoirs, generating relatively longer but narrower fractures, activating more natural fractures, and creating a larger stimulated reservoir volume.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Energy & Fuels
Ting Hu, Yanfei Wang, Tianfu Xu, Hailong Tian, Zhenhua Rui, Yang Zhao, TingTing Liu
Summary: This study investigates the distribution of CO2 in an oil reservoir by considering water-rock geochemical reactions. The results show that the distribution of CO2 varies between gas phase and oil phase, and neglecting these reactions can lead to underestimation of CO2 storage and oil recovery.
Article
Chemistry, Physical
Mohammad Zamehrian, Behnam Sedaee
Summary: This study investigates the effects of fractures on underground hydrogen storage and production using numerical simulations. It finds that fractures can accelerate hydrogen production, resulting in higher recovery and purity. However, the purity of hydrogen produced from fractured reservoirs decreases more rapidly than a conventional one. The study also explores the effects of various factors on hydrogen storage, such as fracture system, condensate presence, and injection/production cycles, and identifies nitrogen and methane as promising cushion gas options for hydrogen production in different media.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Energy & Fuels
Congge He, Lun Zhao, Heng Song, Zifei Fan, Anzhu Xu, Xing Zeng, Haiyan Zhao, Qingying Hou, Yefei Chen, Jincai Wang
Summary: This paper illustrates the impact of stress-sensitive permeability on productivity in naturally fracture carbonate reservoirs and develops a new mathematical model for productivity prediction considering stress-sensitive permeability. The experiment results show significant influence of stress sensitivity on fracture cores, and the new model has a broader applicability compared to the classic model.
ENERGY EXPLORATION & EXPLOITATION
(2022)
Article
Computer Science, Interdisciplinary Applications
Cong Xiao, Shicheng Zhang, Xingfang Ma, Tong Zhou, Tengfei Hou, Fushan Chen
Summary: The reliable and predictive control for closed-loop refracturing design and optimization is important to improve unconventional resource development and recovery in petroleum engineering. To reduce refracturing-decision risk under uncertainty, an efficient and robust two-stage refracturing optimization workflow is proposed through hybridizing data-space inversion and non-dominated sorting genetic algorithm-II. In this framework, the enhanced net present value and enhanced cumulative gas production are considered as the bi-objective functions, and the refracturing parameters including fracture number and fracture half-length are chosen as the decision variables.
COMPUTERS & CHEMICAL ENGINEERING
(2023)
Article
Engineering, Geological
Yanyan Li, Wei Hu, Siyu Wei, Lihui Li, Zhihong Zhang, Shengyuan Song
Summary: Preexisting discontinuities have a significant impact on fracture complexity in unconventional reservoirs. They act as barriers for fracture growth, resulting in smaller fracture area and higher fluid pressure for fracture extension. Joints play a more significant role in reducing fracture complexity compared to beddings.
ENGINEERING GEOLOGY
(2022)
Article
Engineering, Geological
Ruud Weijermars, Jihoon Wang, Tri Pham
Summary: The study investigates the impact of pressure-loaded natural fractures on wellbore stability, analyzing the instability caused by pressure fractures and the changes in fracture propagation paths.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Engineering, Chemical
A. R. Khoei, R. Ehsani, N. Hosseini
Summary: This paper develops a numerical model for assessing carbon dioxide transport through naturally fractured cap-rocks during CO2 sequestration. The model considers micro-cracks and macro-cracks, and incorporates their effects using implicit and explicit methods. The flow of water and CO2 within the fractured porous medium is governed by Darcy law and Poiseuille flow, and mass conservation law is fulfilled through integral formulation. The X-FEM technique is applied to model the explicit representation of macro-cracks. The effects of cracks' aperture, orientation, temperature, and injection depth are investigated through numerical examples.
TRANSPORT IN POROUS MEDIA
(2022)
Article
Geochemistry & Geophysics
Paul Edigbue, Abdullatif Al-Shuhail, Sherif M. Hanafy
Summary: This paper proposes a semi-supervised target track recognition algorithm based on a semi-supervised generative adversarial network (SSGAN) which learns a robust model from a few labeled target track examples and deals with outliers in the data. The method achieves highly competitive target track recognition performance, with a minimum accuracy of 97% and a 15.7% improvement compared to state-of-the-art methods.
Article
Chemistry, Multidisciplinary
Septriandi A. Chan, Paul Edigbue, Sikandar Khan, Abdul L. Ashadi, Abdullatif A. Al-Shuhail
Summary: The Rub' Al-Khali basin in Saudi Arabia is unexplored and lacks digital geologic models and synthetic seismic data. Researchers built a 2D viscoelastic model and generated dual-component seismic data using the finite-difference technique. These models and datasets are made available for other researchers on an open-source platform.
APPLIED SCIENCES-BASEL
(2021)
Article
Geosciences, Multidisciplinary
Paul Irikefe Edigbue, Abdullah Abobakr Al-Mashhor, Anastasios Plougarlis, Pantelis Soupios, Markos Tranos, SanLinn Kaka, Abdullatif Al-Shuhail, Mansour Al-Garni
Summary: Characterizing subsurface site conditions and understanding main geological features are critical for safety assessment in construction projects. This study used geophysical and geological investigations to identify fault zones, fractures, and geothermal fluids in a construction site in western Saudi Arabia. The integration of these techniques provided valuable insights into the site's geological structural framework and the potential presence of geothermal fluids.
JOURNAL OF APPLIED GEOPHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Naveed Ahmad, Sikandar Khan, Abdullatif Al-Shuhail
Summary: The study area in the Punjab Territory of Pakistan was analyzed using 2D seismic and well log data to interpret the subsurface structure and reservoir characteristics of the Kabirwala area Tola (01) well. Formation evaluation for hydrocarbon potential and petrophysical analysis were conducted to identify possible hydrocarbon-bearing zones, with the presence of the Tola-01 well providing confirmation for potential hydrocarbon entrapment in the high zone of interest.
APPLIED SCIENCES-BASEL
(2021)
Article
Geochemistry & Geophysics
Naveed Ahmad, Sikandar Khan, Eisha Fatima Noor, Zhihui Zou, Abdullatif Al-Shuhail
Summary: The study interprets the subsurface structure of the Rajian area using seismic sections and petrophysical analysis, identifying two potential hydrocarbon-bearing zones with zone 1 having an average hydrocarbon saturation of about 11% and zone 2 being almost devoid of hydrocarbons. The area has undergone severe distortion shown by thrusts and back thrusts, forming a triangular subsurface zone, with a final trend of northwest-southeast indicating a compressional regime.
Article
Green & Sustainable Science & Technology
Naveed Ahmad, Sikandar Khan, Muhsan Ehsan, Fayaz Ur Rehman, Abdullatif Al-Shuhail
Summary: The main objective of this study is to estimate changes in land use and land cover in the Peshawar basin, Pakistan, from 2000 to 2020. The results showed a significant increase in urbanization and a significant decrease in vegetation. This study is of great importance for farmers and environmentalists in managing grasslands, agricultural land, populations, and water bodies.
Article
Energy & Fuels
Ahmed Al-Dawood, Abdullatif Al-Shuhail
Summary: This research focuses on characterizing reservoir properties using rock physics and AVO analysis, followed by pre-stack inversion. Two approaches are investigated: one utilizing well and seismic data, and the other utilizing only seismic data. The first approach involves well-log cross-plots and AVO analysis to determine feasibility and pay zone, followed by pre-stack inversion for predicting porosity and gas saturation. The second approach involves generating synthetic seismograms and synthetic well logs for predicting reservoir properties. The results are validated using real well data.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2022)
Article
Energy & Fuels
Lutfi Mulyadi Surachman, Abdullatif Al-Shuhail
Summary: Analysis of amplitudes of transmitted waves (TAVO) is an extension of conventional AVO analysis. In this study, a new domain called common transmission point (CTP) gather is introduced for TAVO analysis, and it is applied to a model with a gas channel in an oil reservoir. The proposed CTP TAVO analysis method accurately estimates various ratio parameters.
Correction
Green & Sustainable Science & Technology
Naveed Ahmad, Sikandar Khan, Muhsan Ehsan, Fayaz Ur Rehman, Abdullatif Al-Shuhail
Article
Chemistry, Analytical
Amen Bargees, Abdullatif A. Al-Shuhail
Summary: This paper proposes a method for the first arrival picking of non-minimum phase data based on complex trace analysis. By introducing an outlier detection method, the first arrivals in seismic data can be accurately identified.
Review
Chemistry, Multidisciplinary
Dicky Harishidayat, Abdullatif Al-Shuhail, Giovanni Randazzo, Stefania Lanza, Anselme Muzirafuti
Summary: This paper presents an overview of seismic and surface geomorphology techniques and proposes an integrated workflow for better geological mapping, 3D surface imaging, and reconstruction. The interpretation of sound waves can help reconstruct various geomorphological features, and the integration of surface and subsurface geomorphology techniques can increase accuracy in modeling and reduce data uncertainty.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Analytical
Paul Edigbue, Ismail Demirci, Irfan Akca, Hamdan Hamdan, Panagiotis Kirmizakis, Pantelis Soupios, Markos Tranos, Israa S. Abu-Mahfouz, Emin Candansayar, Sherif Hanafy, Abdullatif Al-Shuhail
Summary: The main geological structures in the Dammam Dome were studied by integrating geophysical measurements and applying new methodological approaches. The results demonstrate the capability of using combined local and global optimization techniques to estimate model parameters and provide high-resolution subsurface images.
Article
Chemistry, Multidisciplinary
Sherif Mohamed Hanafy, Abdullah Al-Mashhor, Abdullatif Abdulrahman Al-Shuhail
Summary: This study quantitatively investigates the performance of a seismic receiver array in the presence of topographic variations and positioning errors. The study calculates the errors in receiver positions and elevation using Differential GPS measurements and analyzes their effects. The results show that correcting for elevation errors significantly enhances the performance of the seismic receiver array.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Multidisciplinary
Paul Edigbue, Ismail Demirci, Irfan Akca, Hamdan Ali Hamdan, Panagiotis Kirmizakis, Pantelis Soupios, Emin Candansayar, Sherif Hanafy, Abdullatif Al-Shuhail
Summary: Non-uniqueness is a challenge in geophysical inversions. This study proposes a combined local and global optimization approach to tackle this challenge. By jointly estimating the physical model parameters in direct current resistivity and seismic refraction data, this method shows improved anomaly delineation.
APPLIED SCIENCES-BASEL
(2022)
Article
Geochemistry & Geophysics
Xu Liu, Huijian Li, Abdullatif A. Al-Shuhail, Bo Liu, Zhengyong Ren
Summary: Research has investigated the complexities of seismic reflection/transmission problems in various porous materials described by poro-viscoelastic theories. It has been shown that even simple plane waves at plane interfaces between different isotropic viscoelastic solids are more complicated than initially expected. Further study is needed to address the difficulties in accurately selecting the signs of vertical slowness vectors in order to calculate R/T coefficients without unphysical discontinuity.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)