Article
Engineering, Chemical
Krishna Raghav Chaturvedi, Durgesh Ravilla, Waquar Kaleem, Prashant Jadhawar, Tushar Sharma
Summary: This study investigates the impact of varying salinity on the CO2 loading capacity of water and finds that the low salinity (LS) water-alternating-gas (WAG) process has potential for achieving high oil recovery rates under different test temperatures. It is also observed that an increase in pressure has a positive effect on CO2 loading, while an increase in temperature shows the opposite behavior. The reduction in water salinity is identified as a favorable factor in terms of CO2 storage and oil recovery performance during CO2 injection.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Energy & Fuels
Davood Zivar, Peyman Pourafshary, Nikoo Moradpour
Summary: The study demonstrates that the low salinity surfactant (LSS) flooding method outperforms low salinity water (LSW) or surfactant flooding (SF) in reducing residual oil saturation (ROS). Experimental data shows a significant difference in ROS between LSS and SF within different ranges of capillary numbers.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2021)
Review
Energy & Fuels
Afeez Gbadamosi, Shirish Patil, Dhafer Al Shehri, Muhammad Shahzad Kamal, S. M. Shakil Hussain, Emad W. Al-Shalabi, Anas Mohammed Hassan
Summary: This article reviews the combination of low salinity waterflooding (LSWF) and chemical enhanced oil recovery (EOR) for improving oil production in reservoirs. Experimental and modeling results show that the combination of LSWF and chemical EOR is more efficient than individual EOR methods.
Article
Energy & Fuels
Qian Wang, Jian Shen, Piroska Lorinczi, Paul Glover, Shenglai Yang, Hao Chen
Summary: Miscible CO2-SAG flooding, by adding a CO2 soaking process after CO2 breakthrough, improves the recovery and permeability variation during CO2 flooding, especially in areas with low permeability and high residual oil saturation. The soaking process leads to more homogeneous distribution of permeability decline and a greater increase in permeability decline, with significant improvement in recovery observed in lower permeability cores.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Energy & Fuels
Xin-Jie Luo, Bing Wei, Ke Gao, Bo Jing, Bo Huang, Ping Guo, Hong-Yao Yin, Yu-Jun Feng, Xi Zhang
Summary: This study developed a high-pressure CO2-triggered gel system based on a smart surfactant to control gas channeling in water-alternating-CO2 flooding. The gel system effectively blocked high-permeability layers and increased oil recovery.
Article
Energy & Fuels
Ahmed S. Adila, Emad W. Al-Shalabi, Waleed Alameri
Summary: This paper investigates the effect of hybrid surfactant-LSWI/EWI on oil recovery from carbonate cores under harsh conditions through a numerical 2D simulation model. The results show that the hybrid surfactant-EWI can alter wettability and achieve higher oil recovery compared to other techniques. The study emphasizes the importance of surfactant adsorption and concentration for the hybrid surfactant-EWI technique.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Chemical
Jiani Hu, Meilong Fu, Minxuan Li, Honglin He, Baofeng Hou, Lifeng Chen, Wenbo Liu
Summary: SiO2 nanofluid alternating with CO2 injection can be used as an effective substitute for the conventional water alternating gas (WAG) process in oil flooding experiments. The SiO2 nanofluid demonstrates excellent stability and emulsification properties, making it a promising medium for petroleum-related applications. Smaller slug sizes and an optimal slug ratio can delay the breakthrough time and enhance the effectiveness of nanofluid alternate CO2 flooding for enhanced oil recovery (EOR). Additionally, lower permeability rock cores show higher oil recovery rates.
Article
Energy & Fuels
Mariam Shakeel, Aida Samanova, Peyman Pourafshary, Muhammad Rehan Hashmet
Summary: The study aims to optimize the performance of engineered water surfactant flooding (EWSF) by designing a negative salinity gradient. By adjusting the brine salinity and creating a negative salinity gradient, a higher incremental oil recovery can be achieved during the surfactant flooding process.
Article
Soil Science
Ya-Lei Li, Zhen-Ming Ge, Li-Na Xie, Shi-Hua Li, Li-Shan Tan
Summary: Coastal marshes are important in sequestering carbon, but are vulnerable to global change. This study investigated the effects of waterlogging and salinity on soil CO2 effluxes in Spartina alterniflora marshes. Waterlogging suppressed soil respiration during inundation but increased it during reaeration, while salinity levels had varying effects. The study found that changes in root biomass and microbial activities played a key role in soil respiration variations under different hydrological treatments.
APPLIED SOIL ECOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Abbas Shahrabadi, Parham Babakhani Dehkordi, Fatemeh Razavirad, Reza Noorimotlagh, Masoud Nasiri Zarandi
Summary: The study found that low salinity water injection has a significant effect on releasing trapped oil, and smart water flooding achieves the maximum oil recovery. Low salinity water and smart water have a significant impact on relative permeability curves, indicating wettability alteration.
NATURAL RESOURCES RESEARCH
(2022)
Article
Chemistry, Physical
Taniya Kar, Hyeyoung Cho, Abbas Firoozabadi
Summary: This study discusses the mechanisms of low salinity waterflooding and finds that oil recovery is higher from high salinity water injection than from low salinity water injection. There is a strong relationship between interface elasticity and oil recovery, while no definitive correlation is found between oil recovery and wettability.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Energy & Fuels
Abdulrazag Zekri, Hildah Nantongo, Fathi Boukadi
Summary: The efficacy of low salinity water flooding depends on the wettability of the system, with seawater being optimal for oil-wet and intermediate-wettability systems. Sequential flooding with seawater followed by diluted seawater yielded the highest displacement efficiency of 88% in a water-wet system. Additionally, low-salinity brine followed by sulfate showed better performance in a water-wet environment compared to oil- and intermediate-wettability systems.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2021)
Review
Energy & Fuels
Shijia Ma, Lesley A. James
Summary: Low salinity water injection (LSWI) and CO2 Water-Alternating-Gas (WAG) injection are cost-effective and environmentally friendly methods for oil recovery. The hybrid EOR method, CO2 low salinity (LS) WAG injection, shows potential in optimizing oil recovery and decreasing operational costs. However, the mechanism for increased recovery using this method is uncertain.
Article
Chemistry, Physical
S. Abbasi, E. Khamehchi
Summary: The research focuses on the competition between dissolution and precipitation mechanisms in the presence of calcite rock samples at reservoir conditions. The results showed that sulfate scale precipitations were dominant with the highest precipitation ratio, and ion concentrations of Ca2+, Sr2+, and SO42- determined the dominant mechanism.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Energy & Fuels
Sunlee Han, Allan Gomez-Flores, Sowon Choi, Hyunjung Kim, Youngsoo Lee
Summary: We examined the stability of SiO2 and Al2O3 nanoparticles in both deionized water and low-salinity water. The stability was influenced by dispersion techniques and surfactant addition. SiO2 showed better stability due to its hydrophilicity, while Al2O3 tended to aggregate in low-salinity water. Various dispersion methods were applied to Al2O3, and the best stability was achieved with cationic and nonionic surfactants at pH 2.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Ranjan Phukan, Subrata Borgohain Gogoi, Pankaj Tiwari
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2019)
Article
Chemistry, Physical
Ranjan Phukan, Subrata Borgohain Gogoi, Pankaj Tiwari
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2020)
Article
Energy & Fuels
Sombir Pannu, Ranjan Phukan, Pankaj Tiwari
Summary: This study examines the efficacy of a combined bio and synthetic surfactants system with glycerol in enhancing oil recovery. The results show that the combined surfactant system has a significant effect on oil-water interfacial tension and wettability alteration. It can achieve ultra-low IFT and lead to additional oil recovery of 15-20% OOIP.
PETROLEUM SCIENCE AND TECHNOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Prasun Banik, Ranjan Phukan, Ranjan Kumar Sarmah, Minati Das
Summary: Coal is a widely available energy resource used by humans for its comfort, but it has adverse effects on the environment. Coal bed methane (CBM) from underground coal seams offers a pure and environmentally friendly alternative. Spectroscopic instruments such as FTIR, UV visible spectroscopy, XRD, and solid state NMR are commonly used to analyze the chemical structures of complex coals and their impact on methane gas. This research analyzes virgin coal samples from the Barail Formation using FTIR and XRD, identifying various functional groups and minerals present. The results indicate that coal at a depth of 740-846 m is favorable for economic methane gas production, showing potential for coal as an unconventional resource.
JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA
(2023)
Article
Energy & Fuels
Ranjan Phukan, Subrata Borgohain Gogoi, Pankaj Tiwari
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2019)