Article
Energy & Fuels
Yong Liu, Yanbin Yao, Dameng Liu, Chi Zhang
Summary: Forced imbibition in shale reservoirs is crucial for efficient recovery of shale gas, but it can also lead to low flowback efficiency and reservoir damages. This study investigated imbibition behaviors in Longmaxi shales under four different boundary conditions using nuclear magnetic resonance technology. The results showed that the shale bedding structure is the key factor determining the imbibition dynamics and patterns under different boundary conditions.
Article
Energy & Fuels
Liang Xu, Qi Li, Matthew Myers, Yongsheng Tan
Summary: The study shows that capillary force and friction resistance play important roles in the spontaneous imbibition process of tight sandstones with different bedding directions. Different bedding directions result in varying imbibition rates and efficiencies, offering guidance for the development of tight sandstone gas fields.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Zhihao Jiang, Gaoren Li, Peiqiang Zhao, You Zhou, Zhiqiang Mao, Zhidi Liu
Summary: Wettability is crucial for understanding the seepage characteristics of tight sandstone reservoirs. This study investigates the spontaneous imbibition and displacement behaviors of mixed-wet tight sandstone reservoirs using high precision balance and nuclear magnetic resonance (NMR) T2 experiment. The results reveal different types of pores with different wettability and provide a novel wettability evaluation method for mixed-wet tight sandstone.
Article
Energy & Fuels
Tian-Tian Zhang, Zhi-Ping Li, Caspar Daniel Adenutsi, Yong-Zhou Wei, Zhen-Fu Ma, Qing You
Summary: This study systematically examined the imbibition efficiencies of various nanofluids at 60 degrees C, showing that anionic-nonionic and anionic nanofluids exhibited excellent wettability alteration capabilities, significantly increasing oil recovery.
Article
Geochemistry & Geophysics
Chaohui Lyu, Liguo Zhong, Zhengfu Ning, Qing Wang, David R. Cole
Summary: In this study, various experimental techniques were employed to interrogate the complex pore systems of tight gas reservoirs in the Linxing formation of Ordos Basin, China. Results showed that the permeability of tight gas sandstones is very low, with pore types and relative pore contents being more influential factors. Additionally, pore size distribution was found to be critical for the permeability, with pores averaging approximately 350 +/- X nm having sufficient connectivity to host and transmit hydrocarbons.
Article
Chemistry, Physical
Tiantian Zhang, Zhiping Li, Mingwei Gao, Lian Wang, Caspar Daniel Adenutsi, Qing You
Summary: Counter-current imbibition behavior is an important mechanism for oil recovery in tight oil reservoirs during shut-in periods after hydraulic fracturing. This study conducted experiments and developed a numerical model to quantify the range of counter-current imbibition and reduction of oil saturation. The results showed that nanofluid had a higher overall oil recovery and advanced further in the core sample compared to deionized water. The study provides a new method to determine the extent of counter-current imbibition.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Energy & Fuels
Xiang Yan, Caili Dai, Ruoyu Wang, He Liu, Siwei Meng, Xu Jin, Yong Hu, Yining Wu
Summary: This article investigates the countercurrent imbibition of different imbibition agents in order to enhance oil production in tight oil reservoirs. By measuring oil signal profiles and determining the imbibition distance and water saturation, the researchers found that NS-surfactant complexes displayed the highest imbibition efficiency. Furthermore, the study evaluated the ability of the imbibition agents to reduce interfacial tension and alter wettability, with wettability alteration being the primary mechanism to enhance oil recovery. This research provides guidance on selecting the appropriate imbibition agent to improve imbibition efficiency.
Article
Energy & Fuels
Wenlian Xiao, Yubin Yang, Li Ding, Yang Wang, Xiaoying Zhou, Jitian Ren, Min Li, Jinzhou Zhao, Lingli Zheng
Summary: This study investigated the effect of spontaneous imbibition (SI) plus waterflooding on oil recovery in tight sandstone reservoirs. It was found that oil in the SI process mainly comes from macropores and micropores, which is different from previous findings. The SI-plus-waterflooding process showed higher oil recovery factor and lower residual oil saturation compared to waterflooding-only process.
PETROLEUM SCIENCE AND TECHNOLOGY
(2022)
Article
Energy & Fuels
Yi Xin, Guiwen Wang, Bingchang Liu, Yong Ai, Deyang Cai, Shuwen Yang, Hongkun Liu, Yuqiang Xie, Kangjun Chen
Summary: The study describes the reservoir quality and pore characteristics of Bashijiqike sandstones in Kuqa depression using thin sections, SEM analysis, and NMR tests. Fractal analysis was performed using NMR T-2 spectrum to quantify the complexity of pore structure. The results show a positive correlation between fractal dimensions and T-2gm, helping to categorize four pore structure types based on specific parameters.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Guanlin Li, Yuetian Liu, Lijun Mi, Laiming Song, Ziyan Cheng, Qihao Qian, Liang Xue, Xuehao Pei
Summary: The scaling laws play a critical role in researching spontaneous imbibition characteristics and predicting oil and gas recovery from fractured reservoirs. This paper focuses on developing a shape factor for scaling the multi-dimensional counter-current imbibition processes. The results show that the relationship between front distance and imbibition time of 2D and 3D models is different from that of 1D models. The new shape factor is time-dependent and varies with normalized recovery, providing a solution to the difficulty of scaling imbibition data using a constant shape factor.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Yuejie Wang, Huiqing Liu, Yu Li, Qing Wang
Summary: The research established a spontaneous imbibition model for tight reservoirs, verified its reliability through experiments, and found variations in imbibition area and recovery under different boundary conditions. The superimposed effect can not only enhance oil washing efficiency but also inhibit the spread of the imbibition area.
Article
Energy & Fuels
Ran Lin, Zhihao Yu, Jinzhou Zhao, Caili Dai, Yongpeng Sun, Lan Ren, Mengke Xie
Summary: This study investigates the impact of CO2 flooding on tight sandstones, revealing that the corrosion process enhances porosity and liquid permeability while reducing the pore and throat diameter for movable fluids. XRD analysis indicated main corrosion minerals to be calcite, dolomite, and feldspar, with significantly increased corrosion pores post-reaction. These findings suggest improved formation petrophysical properties associated with CO2 flooding in tight sandstones, providing a theoretical basis for the efficient development of tight oil reservoirs.
Article
Energy & Fuels
Yinghe Chen, Jianguang Wei, Fahimeh Hadavimoghaddam, Xiaofeng Zhou, Mehdi Ostadhassan, Xiaoqing Zhao, Abdumalik Gayubov, Jiangtao Li, Anlun Wang, Ying Yang, Xuedong Shi
Summary: This study investigates the oil recovery mechanisms of static imbibition in tight sandstone under different pressures, and optimizes the imbibition agents. The experimental results reveal that the recovery rates and mechanisms vary for different agents and pressures.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
Article
Energy & Fuels
Jin Zhang, Dongmei Wang
Summary: This study investigated the combination of forced surfactant imbibition process with acid stimulation for improving hydrocarbon recovery in carbonate-rich tight formations. The results demonstrated that this approach significantly enhanced oil recovery by increasing the contact area between rock and fluid, leading to improved porosity, permeability, and microstructure changes in the rocks.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Geosciences, Multidisciplinary
M. Y. Shumskayte, A. Y. Manakov, A. K. Sagidullin, V. N. Glinskikh, L. S. Podenko
Summary: In this study, T2 spectra for models of thawing hydrate-bearing sediment were investigated, showing that low-field NMR can be used to study the kinetics of THF hydrates formation/melting in porous media and to explore phase transformations in porous media. Individual bands in the T2 spectra were identified, corresponding to proton relaxation in solid hydrate, aqueous THF solution, and a thin layer of liquid at the hydrate-solid particle boundary.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Instruments & Instrumentation
Abdul Ghaffar, Qi Li, Mujahid Mehdi, Bhagwan Das, Ishrat Hameed Alvi, Qifeng Xie, Jiyuan Ma
Summary: This article introduces a multiplexing sensor technique based on intensity variation for angle and temperature measurement using polymer optical fiber. The experimental results demonstrate that this technique is much easier to implement compared to other methods and can be used for a wide range of measurements, including force, strain, pressure, and refractive index.
INFRARED PHYSICS & TECHNOLOGY
(2023)
Review
Construction & Building Technology
Ishrat Hameed Alvi, Qi Li, Yunlu Hou, Chikezie Chimere Onyekwena, Min Zhang, Abdul Ghaffar
Summary: This comprehensive review evaluates the research efforts on the utilization of graphene oxide (GO) in recycled aggregate-based cement composites (GO-RA-CC) and maps the research viewpoints from available literature. The results indicate that the addition of GO can improve the mechanical and durability properties of RA-CC by enhancing interfacial transition zones and increasing hydration reactions. Life cycle assessment studies also show that GO-RA-CC has better environmental performance, particularly in CO2 emissions reduction, compared to conventional cement composites.
JOURNAL OF BUILDING ENGINEERING
(2023)
Review
Green & Sustainable Science & Technology
Chikezie Chimere Onyekwena, Qiang Xue, Qi Li, Happiness Ijeoma Umeobi, Abdul Ghaffar, Mohammad Hamed Fasihnikoutalab
Summary: This article aims to review previous studies on the reaction mechanisms of rMgO, factors influencing the carbonation curing of rMgO-based composites, and the application of carbonated rMgO in soil stabilization. The findings suggest that rMgO hydration is crucial and material properties and curing conditions affect the carbonation process. Carbonation treatment improves the mechanical and durability performance of carbonated rMgO composites by refining the pore structure and improving porosity. Utilizing hydration agents eliminates delayed hydration and enhances carbonation efficiency. Recommendations for future research directions on rMgO-based composites carbonation are provided.
CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY
(2023)
Article
Thermodynamics
Liang Xu, Qi Li, Matthew Myers, Xiaomin Cao
Summary: Huff-n-puff methods using nanofluid and/or CO2 are the most promising methods for enhancing oil recovery in the Mahu Oilfield, Xinjiang, China. The study showed that D2O could only strip oil from larger pores, resulting in a low oil recovery efficiency of 14.89%. On the other hand, CO2 could effectively enter both small and large pores, leading to a higher oil recovery efficiency of 40.44%. When combined with CO2, the nanofluid further improved the oil recovery in small pores by more than 10%. Overall, the synergistic effect of combining CO2 and nanofluid huff-n-puff achieved recovery rates close to 50% of the overall oil.
Article
Engineering, Ocean
Chikezie Chimere Onyekwena, Qi Li, Ishrat Hameed Alvi, Abdul Ghaffar, Xianwei Zhang
Summary: This study investigates the geomechanical performances of geocell-reinforced soil (GRS) backfilled with magnesia-based cement-stabilized marine fill using the nonlinear stress-strain relationship and 3-D FEM models as an alternative to the traditional earth GRS walls. The study finds satisfactory results regarding stability, deformation, and settlement. Therefore, cement-stabilized soil retaining walls using magnesia-based cement could be a viable alternative to traditional earth GRS walls.
MARINE GEORESOURCES & GEOTECHNOLOGY
(2023)
Article
Engineering, Geological
Xiaying Li, Xinglin Lei, Haimeng Shen, Qi Li
Summary: The distribution of pore water significantly affects the mechanical property of rocks. In this study, the effect of heterogeneous distribution of pore water with high pressure on lower Shaximiao sandstone was investigated. It was found that flooding region with higher pore pressure benefits earlier fracturing, with fractures initiating in the saturated region and migrating towards partially saturated and dry regions. The formation of complex microcrack network and induced seismicity with higher b-value around the wet/dry boundary suggests the potential of developing an interactive wet/dry mixed fracturing technology to facilitate the formation of complex fracture networks and reduce the risk of induced earthquakes.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Energy & Fuels
Hesam Bazargan Harandi, Liwei Zhang, Ali Kargari, Pang-Chieh Sui, Yan Wang, Meiheriayi Mutailipu, Hao Lu, Qi Li
Summary: This study provides a brief review on CO2-EWR technology and its necessities. It comprehensively assesses various treatment technologies for high TDS brine and proposes a chain desalination process for treatment. Membrane distillation (MD) is selected as a suitable main treatment technology, and a mathematical thermodynamic model is programmed to analyze its performance parameters. The study also demonstrates that using a solar energy auxiliary system can enhance the flux of produced freshwater from the extracted brine.
GREENHOUSE GASES-SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Civil
Tao Yu, Qi Li, Yongsheng Tan, Bowen Chen, Haixiang Hu
Summary: This study investigated the influence of wettability in tight sandstone reservoirs on the replacement of brine by CO2 in nanopores through molecular dynamics simulations. The results demonstrated that the interaction between CO2 and water molecules near pore walls varied significantly depending on the wettability, affecting the replacement mechanism.
JOURNAL OF HYDROLOGY
(2023)
Article
Energy & Fuels
Xiaoyan Zhang, Ning Liu, Qi Li, Pingzhi Chen, Xiaochen Wei
Summary: Acid gas injection is an effective strategy for dealing with waste gas in sour oil and gas reservoirs. This study examines the impact of H2S content on acid gas migration and storage in shale reservoirs. The results show that variations in acid gas properties due to different H2S contents greatly influence its plume migration. The horizontal migration distance and pattern change with H2S content, with the maximum distance occurring at different locations depending on the acid gas state.
GREENHOUSE GASES-SCIENCE AND TECHNOLOGY
(2023)
Article
Environmental Sciences
Xianwei Zhang, Ping Wang, Jiangshan Li, Yonghong Gao, Shiyu Liu, Saiou Fu, Chikezie Chimere Onyekwena, Xuewen Lei
Summary: Heavy metals and ammonia nitrogen leaching from electrolytic manganese residue contaminate agricultural soils and water bodies. The leaching tests showed that manganese and ammonia nitrogen had high leachability and their cumulative release fit the HILL model well. Significant accumulation of heavy metals and ammonia nitrogen was observed in agricultural soils after contamination. The risk assessment revealed an increased ecological risk of manganese in agricultural soils and a potential threat to aquatic systems from the large release of ammonia nitrogen.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Energy & Fuels
Xiaying Li, Xinglin Lei, Qi Li
Summary: Understanding the propagating mechanism of complex fracture network is crucial for optimizing the hydraulic fracturing design scheme. The experimental results show that the hydraulic fracturing behaviors were significantly influenced by bedding structure and water infiltration. The bedding plane plays an important role on breakdown pressure, distribution characteristics of AE activities and hydraulic fracture networks.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
Article
Energy & Fuels
Yiyan Zhong, Qi Li, Liang Xu, Yiping Wen, Yunlu Hou, Wenbin Gao
Summary: The heterogeneity of reservoirs has a significant impact on the migration behavior of CO2. Higher coefficient of variation and correlation length values can reduce the migration distance of CO2 while increasing the spread extent. Reservoirs with high coefficient of variation and low correlation length are more suitable for safely storing CO2.
GREENHOUSE GASES-SCIENCE AND TECHNOLOGY
(2023)
Article
Energy & Fuels
Tao Yu, Qi Li, Yongsheng Tan, Haixiang Hu, Liang Xu, Xiaochun Li, Lifeng Xu, Bowen Chen
Summary: This study used molecular dynamics simulation to investigate the behavior of fluid-fluid and fluid-solid interfaces and the exploitation potential of film-like residual oil in water-wet, mixed-wet, and oil-wet systems after CO2 flooding. The results showed that CO2 molecules could easily enter the oil films and divide the oil phase into clusters of different sizes.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
