Review
Engineering, Petroleum
Ishank Gupta, Chandra Rai, Deepak Devegowda, Carl H. Sondergeld
Summary: Fracture hit originally refers to interference between an infill-well fracture and an adjacent well during hydraulic-fracturing, but now it includes any type of well interference in unconventional reservoirs. The impact of fracture hits is influenced by various factors such as petrophysical and geomechanical properties, completion parameters, and development decisions. Strategies to manage fracture hits include simultaneous lease development, repressuring or refracturing parent wells, using high-permeability plugging agents in child wells, and optimizing stage and cluster spacing.
Review
Geosciences, Multidisciplinary
Achinta Bera, Subhash Shah
Summary: Characterization and modeling of unconventional reservoirs present challenges due to the complexity of fluid flow through nanoporous media. Modern imaging techniques play a key role in understanding the difficulty of characterization methodologies in studying complex nanopore systems. Additionally, economic analysis of imaging techniques for unconventional reservoir characterization and their application in field development projects are discussed.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Engineering, Multidisciplinary
Jiamin Jiang
Summary: This study focuses on developing localization methods for complex fracture networks and flow physics in unconventional reservoirs. By utilizing the diffusive nature of pressure updates, an adaptive algorithm is proposed to estimate active domains, and a localized solver based on nonlinear domain decomposition is further developed. The new solver provides effective partitioning that adapts to flow dynamics and Newton updates, enabling superior computational performance compared to standard methods.
APPLIED MATHEMATICAL MODELLING
(2021)
Article
Energy & Fuels
Lu Jin, Xincheng Wan, Nicholas A. Azzolina, Nicholas W. Bosshart, Jin Zhao, Yang Yu, Xue Yu, Steven A. Smith, James A. Sorensen, Charles D. Gorecki
Summary: Interference between wells caused by connected fractures in unconventional reservoirs can lead to minimal enhanced oil recovery response, which can be improved through the use of surfactant injections for gas EOR strategies in the Bakken Formation.
Review
Geochemistry & Geophysics
Luoyi Huang, Mingjing Lu, Guanglong Sheng, Jie Gong, Jiayu Ruan
Summary: This paper provides a comprehensive review of the current research progress and key technical issues in hydraulic fracturing in unconventional reservoirs. It guides further research by accurately describing the morphology of induced fracture networks and flow capacity.
Article
Energy & Fuels
C. P. Zhang, P. Cheng, Z. Y. Ma, P. G. Ranjith, J. P. Zhou
Summary: The study compared the fracturing efficiency of CO2-based fracturing (CBF) and water-based fracturing (WBF) on siltstone samples, revealing that CBF has lower breakdown pressure and greater fracture aperture compared to WBF, which helps create more complex and efficient fracture networks.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Geochemistry & Geophysics
Yu Jiang, John E. Killough, Xingru Wu, Yongzheng Cui
Summary: This study investigates the impact of temperature on fracturing design and shows that injecting cold fracturing fluid decelerates hydraulic fracture propagation and reduces production prediction, especially for multistage fractured wells where the fracture geometry enlarges along the fluid flow direction in a horizontal segment, potentially lowering the cost of hydraulic fracturing designs.
Article
Engineering, Geological
Yanli Pei, Kamy Sepehrnoori
Summary: A 3D explicitly coupled geomechanics and multiphase compositional model was developed to simulate stress evolution in a multilayer unconventional reservoir with complex fracture geometry. Different scenarios were studied to provide rules for infill drilling under the impacts of various factors. The study found that reservoir permeability, fracture penetration, differential stress, and rock stiffness all play significant roles in stress evolution and well drilling strategy.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Geosciences, Multidisciplinary
Jinghua Liu, Mingjing Lu, Guanglong Sheng
Summary: Fractal theory is used to describe the distribution of volume fracture network in unconventional reservoirs, and the comparison between conventional dual-media model and fractal dual-media model in analyzing reservoir permeability and porosity. The research findings suggest that fractal parameters can more accurately describe reservoir physical properties, and the conventional dual-media model calculates relatively higher flow rates in the early stage.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Physics, Multidisciplinary
Yang Wang, Zefei Lv
Summary: Unconventional reservoirs have strong heterogeneity, making it challenging to increase natural gas production. A composite fracturing method is proposed to address the issue of inadequate support during acid corrosion, which first uses a proppant to support the crack tip and then gelled acid to corrode the middle and rear parts of the crack.
FRONTIERS IN PHYSICS
(2023)
Article
Energy & Fuels
Bangtang Yin, Chao Zhang, Zhiyuan Wang, Baojiang Sun, Yonghai Gao, Xiaopeng Wang, Chuang Bi, Qilong Zhang, Jintang Wang, Juntai Shi
Summary: A method based on fractal interpolation theory was proposed to generate fractures with rough surfaces. A proppant-fracturing fluid two-phase flow model was established using computational fluid dynamics (CFD)-discrete element method (DEM) coupling considering particle-particle, particle-wall, and particle-fluid interactions. Simulation results were verified with experimental data, demonstrating the model's capability to accurately reproduce proppant transport and accumulation in rough fractures.
PETROLEUM EXPLORATION AND DEVELOPMENT
(2023)
Article
Energy & Fuels
Yanrui Ning, Hossein Kazemi, Ali Tura, T. L. Davis
Summary: This study demonstrates the use of water and oil tracers in unconventional shale reservoirs for flow channel characterization and numerical modeling to predict oil and gas recovery. It also explores the potential of CO2-EOR as an effective decarbonization method, with the ability to store CO2 and prevent leakage.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Review
Energy & Fuels
Masoud Aslannezhad, Azim Kalantariasl, Zhenjiang You, Stefan Iglauer, Alireza Keshavarz
Summary: The paper presents a critical review on current micro-proppants models, technologies, and field applications, focusing on micro-proppants placement in hydraulic and natural fractures. Various factors affecting micro-proppant placement in fractures are analyzed, with the conclusion that using micro-proppants can improve the efficiency of hydraulic fracturing treatment, leading to enhanced oil and gas production.
Article
Energy & Fuels
Harun Rashid, Olufemi Olorode, Chukwudi Chukwudozie
Summary: In this paper, a fixed-stress coupling method of pEDFM with XFEM is proposed and demonstrated to model hydraulic fracture propagation in naturally fractured reservoirs. The model is validated to accurately reproduce the analytical solutions to coupled geomechanics and fracture propagation problems. It provides a faster and more efficient approach compared to traditional methods and considers the interaction between hydraulic fractures and low-conductivity natural fractures.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Jia-Zheng Qin, Qian-Hu Zhong, Yong Tang, Wei Yu, Kamy Sepehrnoori
Summary: This study develops an integrated approach combining pressure and rate transient analysis for well interference diagnosis considering complex fracture networks. It reveals that interference flow and compound linear flow are two new flow regimes caused by nearby producers. The findings of this study can help for better evaluating well interference degree in multi-well systems, reducing uncertainty and improving the accuracy of well interference analysis based on both field pressure and rate data.
Review
Computer Science, Interdisciplinary Applications
Elham Bakhshi, Naser Golsanami, Lianjun Chen
Summary: The research on hydraulic fracture propagation can be categorized into field, experimental, and numerical studies, with numerical simulations being the most commonly used method. It has been found that the Lattice simulation approach provides higher accuracy and computational efficiency when simulating complex reservoir conditions.
ARCHIVES OF COMPUTATIONAL METHODS IN ENGINEERING
(2021)
Article
Geochemistry & Geophysics
Naser Golsanami, Shanilka Gimhan Fernando, Madusanka Nirosh Jayasuriya, Weichao Yan, Huaimin Dong, Likai Cui, Xu Dong, Ehsan Barzgar
Summary: Clay minerals and dissolution holes complicate the pore structure of gas hydrate-bearing sediments and sandstone reservoir rocks, adding numerous micropores of varying sizes. The fractal properties of clay groups and dissolution holes, including fractal dimension and lacunarity values, were analyzed to understand the impact on reservoir properties and fluid flow dynamics. The results provide insight for developing improved fractal models for calculating producible oil and gas in reservoirs.
Article
Energy & Fuels
Naser Golsanami, Bin Gong, Sajjad Negahban
Summary: Gas-lift dual gradient drilling with oil-based drilling fluid is investigated in this study. Comparisons are made between different models to evaluate the PVT behavior and optimize the gas flow rate. The existing Standing model has errors in assessing the PVT behavior and is not recommended, while the new models provide more accurate results for mixture evaluation and optimization.
Article
Thermodynamics
Naser Golsanami, Madusanka N. Jayasuriya, Weichao Yan, Shanilka G. Fernando, Xuefeng Liu, Likai Cui, Xuepeng Zhang, Qamar Yasin, Huaimin Dong, Xu Dong
Summary: This study provides a detailed quantitative characterization of clays in hydrocarbon reservoirs using deep learning and SEM images, and investigates the impact of clays on reservoir fluid flow. The results show that clays can significantly reduce reservoir porosity and permeability, shedding new light on the detailed impacts of clay minerals on reservoir quality.
Article
Energy & Fuels
Huaimin Dong, Likai Cui, Linjun Yu, Liyuan Song, Jianmeng Sun, Naser Golsanami, Xuefeng Liu
Summary: This study used a hybrid method to simulate the pore-scale spatial distribution characteristics of gas hydrate, showing that the hybrid method can effectively simulate the spatial distribution characteristics and variation laws of gas hydrate.
JOURNAL OF ENERGY ENGINEERING
(2021)
Article
Acoustics
Xuepeng Zhang, Yujing Jiang, Yue Cai, Xin Li, Naser Golsanami, Xiao Wang, Jian Hao, Ningbo Li, Fabo Wu, Xiaohan Wang
Summary: Stochastic medium (SM) theory is a practical method for ground settlement prediction, but its solution process is complicated. In this study, a simplified analytical solution based on the SM theory is developed to predict ground movement induced by tunneling, and a method to estimate the parameters is proposed. The accuracy of the simplified method is validated by comparing the results with those obtained by the SM theory and measured data. The empirical comparisons demonstrate that the simplified method can provide a more reasonable prediction for ground movement induced by tunneling.
SHOCK AND VIBRATION
(2022)
Article
Energy & Fuels
Xuefeng Liu, Xu Dong, Naser Golsanami, Bo Liu, Luyi W. Shen, Ying Shi, Zongguang Guo, Likai Cui, Yuli Sun, Yijing Du, Baojun Wei
Summary: The study introduces a nine-grid model to evaluate fluid movability by classifying pore fluids based on different types and sizes of pores, providing insights into the N2 displacement test results.
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2021)
Article
Energy & Fuels
Bin Gong, Ruiqi Zhang, Tianwei Sun, Yujing Jiang, Naser Golsanami, Yanlong Li, Shanilka G. Fernando, Madusanka N. Jayasuriya
Summary: This study analyzes the deformation, slope stability, and sand production during methane hydrate exploitation through numerical simulations. The results show that increasing loading and decompression amplitudes lead to increased deformation degree and distribution, elevated pore water pressure, larger methane hydrate regeneration and dissociation areas. Additionally, sand production always starts from the upper and bottom sections of the methane hydrate-bearing sediments layer near the wellbore and increases with mining time.
Article
Energy & Fuels
Qamar Yasin, Mariusz Majdanski, Rizwan Sarwar Awan, Naser Golsanami
Summary: Hydraulic fracturing has become increasingly common in enhanced geothermal systems. Evaluating the fracability of geothermal reservoirs is challenging and requires considering multiple parameters. This study proposes an improved fracability index model that incorporates various parameters to assess rock fracability. The model was validated using well logs and seismic data, demonstrating its effectiveness in evaluating fracability in geothermal and shale reservoirs.
Article
Energy & Fuels
Huaimin Dong, Jianmeng Sun, Muhammad Arif, Yihuai Zhang, Weichao Yan, Stefan Iglauer, Naser Golsanami
Summary: Gas hydrate reservoirs in the Muli area of China have complex lithology, high hardness, developed micro-fractures, and low porosity-permeability. This study combines digital rock technology with field-scale well-logging data to analyze the conductivity mechanism and identify the causes of the observed low resistivity. The findings provide fundamental information for accurate interpretation of key well-logging data and improving gas hydrate reservoir exploitation.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Bin Gong, Ruijie Ye, Ruiqi Zhang, Naser Golsanami, Yujing Jiang, Dingrui Guo, Sajjad Negahban
Summary: Studying the failure mechanism of methane hydrate specimens is important for methane hydrate exploitation. Previous studies mainly focused on the macro or micromechanical response, while this study explored the mechanical response mechanism based on energy evolution. The numerical model of methane hydrate-bearing sediments was constructed and validated using laboratory tests. The simulation results qualitatively described the mechanical properties of the sediments and provided insights into deformation and failure mechanisms.
Article
Energy & Fuels
Huaimin Dong, Xin Zeng, Dalin Zhou, Jinjiang Zhu, Naser Golsanami, Jianmeng Sun, Yihuai Zhang
Summary: This study aims to characterize Langmuir's volume and Langmuir's pressure more effectively using well-logging data to evaluate the gas-bearing capacity of marine shales in the Wufeng-Longmaxi Formation in the southern Sichuan Basin, China. The influencing factors of shale conductivity were analyzed, and it was found that the factors affecting conductivity from strongest to weakest are conductive organic matter, thin low-resistivity layer, clay mineral, pore water, and pyrite.
JOURNAL OF ENERGY ENGINEERING
(2023)
Article
Energy & Fuels
Qamar Yasin, Ali Gholami, Mariusz Majdanski, Bo Liu, Naser Golsanami
Summary: The geologic structure plays a decisive role in controlling fluid flow in geothermal systems. Seismic data can provide high-resolution images of complex structures, but it is challenging to detect the characteristics of fault edges in deep-buried and structurally complex areas. In this study, an intelligent workflow based on structure-oriented filtering and sensitive seismic attributes is proposed to characterize fault edges and fractures in geothermal reservoirs.
Article
Energy & Fuels
Behzad Saberali, Naser Golsanami, Kai Zhang, Bin Gong, Mehdi Ostadhassan
Summary: Intelligent surrogate models are important tools in reservoir simulation, and their efficiency depends on the quality of the data source. The current study uses a hybrid data source based on finite difference and streamline data, which speeds up database preparation and improves model training efficiency. The introduced surrogate model has been validated and shown satisfactory results, making it applicable in other reservoirs and gas exploitation from natural gas hydrate reservoirs in China.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
Article
Mechanics
Behzad Saberali, Kai Zhang, Naser Golsanami
Summary: This study introduces a data-driven proxy modeling approach based on deep learning algorithms, which can determine the location of the injected water front in real-time. By minimizing the use of data extracted from numerical simulators and relying only on commonly available field data, the proposed proxy models successfully simulated breakthrough time and water arrival time in new blind scenarios.
INTERNATIONAL JOURNAL OF COMPUTATIONAL FLUID DYNAMICS
(2022)
