Article
Energy & Fuels
Shuyang Dong, Long He, Liang Li, Yajun Wu, Xuefeng Wang
Summary: Polymer gels based on polyvinyl alcohol were studied for their stability in formation saltwater and their application in reservoir water plugging operations. The prepared PVA/PAM/PF gel showed excellent elastic properties and high plugging capability, making it a promising option for the oil and gas industry.
Article
Energy & Fuels
Diogo Jurelevicius, Luana Ramos, Fernanda Abreu, Ulysses Lins, Maira P. de Sousa, Vanessa V. C. M. dos Santos, Monica Penna, Lucy Seldin
Summary: This study investigated the biogenic production of hydrogen sulfide by sulfate-reducing bacteria in high-temperature oil reservoirs over three years, and found that the addition of nitrate and THPS during secondary oil recovery effectively controlled SRB activity. Different dominant bacterial groups, including thermophilic SRB and nitrate-reducing bacteria in oil reservoir 1, and mesophilic SRB in oil reservoir 2, were identified. The choice of strategy during secondary oil recovery modulated the microbial community and altered the dynamics of H2S production.
Article
Energy & Fuels
Hao Wang, Oluwafemi Precious Oyenowo, Ryosuke Okuno
Summary: This paper presents an experimental study on the injection of aqueous formate solution into oil-wet carbonate porous media. The research explores the potential use of formate as a wettability modifier in oil recovery and carbon storage. The experiments include aqueous stability, wettability alteration, and dynamic imbibition experiments with fractured carbonate cores.
Article
Energy & Fuels
Artem Shagiakhmetov, Svetlana Yushchenko
Summary: The efficient development of carbonate oil deposits with excessive fissuring is a challenge, and uneven well stream watering complicates the process. This research aims to diagnose, evaluate, and prevent well stream watering for carbon deposits. In situ water shut-off technologies and polymer compositions are studied, and a specific carbonate basin of an oil field is investigated. The main cause of well production watering is the breakthrough of formation and injection water through permeable fractures and channels. A composition based on carboxymethyl cellulose is selected for in situ water shut-off.
Article
Energy & Fuels
Yang Xuewen, Wang Rujun, Deng Xingliang, Li Shiyin, Zhang Hui, Yao Chao
Summary: Based on the analysis of geological characteristics and division of reservoir units, this study established physical models and conducted physical simulations to investigate the water flooding mechanism in the fault-controlled fracture-cavity carbonate reservoir under complex flow state. A mathematical model of fault-controlled carbonate reservoir with coexisting seepage and free flow was established, and pilot water injection tests were conducted to evaluate its effects on enhancing oil recovery. The results show that the fault-controlled fracture-cavity carbonate reservoir units can be divided into three types, and the mathematical model can quantitatively describe the fluid flow law in the fracture-cavity body.
PETROLEUM EXPLORATION AND DEVELOPMENT
(2022)
Article
Energy & Fuels
Yue Zhao, Zhaoyi Dai, Chong Dai, Samridhdi Paudyal, Xin Wang, Saebom Ko, Amy T. Kan, Mason Tomson
Summary: The study investigates the formation and inhibition of celestite scale, develops a semiempirical model based on experimental and literature data, and predicts the minimum inhibitor concentration required for celestite scale control.
Article
Energy & Fuels
Rohit Kumar Saw, Ajay Mandal
Summary: The low salinity water flooding (LSWF) technique is cost-effective and environmentally friendly, but its mechanisms are not yet clear. Recovery in LSWF depends on fluid/fluid and rock/fluid interactions. This study investigated both interactions and found different optimal conditions for improved oil recovery. Rock/fluid interaction showed an incremental recovery of 14%, while fluid/fluid interaction showed an incremental recovery of 7% over simple seawater injection. Results highlight the importance of considering both interactions and wettability alteration in LSWF design.
Article
Energy & Fuels
Farida Amrouche, Donglai Xu, Michael Short, Stefan Iglauer, Jan Vinogradov, Martin J. Blunt
Summary: New approaches for enhanced oil recovery (EOR) are needed to improve recovery from mature oil fields. Electrical heating is investigated as a potential EOR method in carbonate reservoirs. The experiment shows that heating can accelerate water imbibition into the rock and improve oil recovery. Renewable-powered heating can be an option for improving recovery from mature oil fields with low environmental footprint.
Article
Green & Sustainable Science & Technology
A. Mahmoodi, H. M. Nick
Summary: Seawater flooding as a secondary or tertiary oil recovery method may face challenges of scale deposition and reservoir souring. This study finds that scale formation has a minor impact on reservoir souring, but reservoir souring and nitrate treatment significantly influence scale formation. Moreover, more efficient nitrate treatment leads to a closer proximity of the hydrogen sulfide generation zone to the production well.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Energy & Fuels
Guoqiang Luan, Chunmei Dong, Karem Azmy, Li-Yun Fu, Chengyan Lin, Lihua Ren, Changying Shi, Jia Li
Summary: The composition of formation waters in the Dongying Depression provides important clues about regional water-rock interactions. Chemical analysis of formation waters from different geological formations reveals two main geochemical facies: the chloride-magnesium facies and the bicarbonate-sodium facies. The salinity and pH of the water show a systematic relationship with ion concentrations, indicating thermodynamic buffering by silicate-carbonate mineral assemblages.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Ilyas Khurshid, Yoshiaki Fujii
Summary: This study investigated the impact of low-temperature CO2 injection on formation breakdown pressure and associated damage, finding that it may cause tension failure, increase permeability, but decrease stability of reservoir, basement, and caprock. The research also looked at factors affecting formation deformation and compared results with experimental data, showing good agreement. Additionally, the study suggests avoiding shallow reservoirs for CO2 capture and storage due to stability concerns.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2021)
Article
Energy & Fuels
Jing Wang, Xiangsheng Qi, Huiqing Hui, Min Yang, Xiaobo Li, Hongguang Liu, Tuozheng Zhang
Summary: This study constructed 3D models of fractured-vuggy reservoirs and conducted experiments to investigate the formation mechanisms of remaining oil during water flooding and the enhanced oil recovery mechanisms by reversing water injection. The results reveal that the type of remaining oil and the reservoir structure play crucial roles in the effectiveness of reversing water injection for enhanced oil recovery.
PETROLEUM EXPLORATION AND DEVELOPMENT
(2022)
Article
Energy & Fuels
Tao Zhang, Xianjin Zeng, Jianchun Guo, Fanhui Zeng, Ming Li
Summary: A computational fluid dynamics model was established in this study to investigate the transport and accumulation behavior of particles in fractures after water flooding. The results showed that injected particles mainly accumulated along the water phase channel in the main fracture, contributing to enhanced oil recovery.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Geosciences, Multidisciplinary
Pin Jia, Hongxin Guo, Yichen Wang, Cong Peng, Linsong Cheng, Xianzhe Ke
Summary: This study designed three kinds of images representing the pore and throat structure of real rocks and established a microscopic pore model of carbonate rocks using numerical simulation software. The effects of different fracture development forms on water flooding characteristics and residual oil distributions were observed. It provides theoretical support for enhancing oil recovery in carbonate reservoirs.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
F. Amrouche, M. J. Blunt, S. Iglauer, M. Short, T. Crosbie, E. Cordero, D. Xu
Summary: A hybrid technique using magnetic field and magnesium oxide nanoparticles has the potential to enhance oil production from oil-wet carbonate reservoirs. The addition of MgO nanoparticles to water increased the recovery factor of oil from rock samples. This cleaner alternative can improve oil extraction efficiency from existing reservoirs.
MATERIALS TODAY CHEMISTRY
(2023)