Article
Energy & Fuels
Chanapol Charoentanaworakun, Falan Srisuriyachai, Suttichai Assabumrungrat, Apinan Soottitantawat
Summary: This study compares the properties of palm oil-derived anionic biosurfactants and the petroleum-sourced SDBS surfactant in terms of adsorption, interfacial tension, and oil recovery. The results show that palm oil-derived surfactants outperform SDBS in terms of adsorption and oil recovery effectiveness.
Article
Chemistry, Physical
Rohit Kumar Saw, Anshuman Singh, Neetish Kumar Maurya, Ajay Mandal
Summary: Low salinity water flooding is cost-effective and environmentally friendly, and the addition of nanoparticles and polymers can significantly increase oil recovery. The viscosity of complex chemical slugs can be increased by adding nanoparticles to polymer solutions. Low salinity water requires a lower concentration of polymer to reach the target viscosity compared to high saline formation water. The addition of nanoparticles reduces interfacial tension and contact angle, leading to higher oil recovery in low salinity water. Injection of low salinity water-based complex fluid results in incremental recovery of OOIP compared to low salinity water and conventional formation water flooding.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Environmental Sciences
Krishna Raghav Chaturvedi, Tushar Sharma
Summary: This study investigated the carbon utilization in shaly-sandstone for oil recovery and sequestration using synthetic smart brines. The addition of shale reduced the porosity and permeability of the sand-packs, but had insignificant impact on CO2-based oil recovery. Smart saline water solutions demonstrated superior control on mitigating shale swelling and reducing interfacial tension, and promoted higher oil recovery from sandstone with high shale content compared to conventional water flooding.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Energy & Fuels
Fuyong Wang, Lu Wang, Liang Jiao, Zhichao Liu, Kun Yang
Summary: This study investigates the mechanism of surfactant enhanced oil recovery under reservoir conditions through experiments on spontaneous imbibition with surfactants. The impact of different surfactant types and concentrations on oil recovery is examined, along with the effects of interfacial tension, rock wettability, formation water salinity, and core permeability. The results suggest that surfactant-assisted spontaneous imbibition primarily operates through IFT reduction, wettability alteration, and emulsification of crude oil. Strategies to increase oil recovery include reducing surfactant solution salinity and creating microfractures.
Article
Energy & Fuels
Guangli Fan, Meng Li, Xinxiao Chen, Aleksandra Palyanitsina, Anton Timoshin
Summary: This study investigated the implementation of Nanosilica particles in chemical flooding processes for the petroleum industry, showcasing their enhancement of polymer performance and oil recovery. Experimental results suggest that the Nanosilica-polymer system is most effective in improving oil recovery.
Article
Polymer Science
Tao Liu, Shaohua Gou, Lihua Zhou, Jingjing Hao, Yang He, Ling Liu, Lan Tang, Shenwen Fang
Summary: In this study, a chitosan grafted imidazoline monomer copolymer was successfully prepared with excellent viscosity retention, temperature resistance, and salt resistance under high temperature and high salt conditions. This copolymer showed potential to enhance oil recovery in oil reservoirs with severe conditions that limit traditional polymers.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Energy & Fuels
Subhash Ayirala, Abdulkareem AlSofi, Zuhair AlYousef, Jinxun Wang, Moataz Abu Alsaud, Ali AlYousef
Summary: By synergizing the composition of injection water through SmartWater technology, enhanced oil recovery (EOR) methods can be optimized to achieve higher oil recoveries and reduce the volume requirements of chemicals and gas. This study demonstrates the significant benefits of different SmartWater-based synergistic EOR technologies, which can have practical implications for more efficient and economical EOR projects in the field.
Article
Chemistry, Applied
Yangyul Ju, Jinsu Ha, Yeeun Song, Doojin Lee
Summary: Physically dual-crosslinked cellulose-based hydrogels were fabricated using metal cations and borate ions, leading to enhanced recovery characteristics. Thixotropic testing was used to study the deformation and recovery behaviors of the hydrogels, plotting structural deformation parameters to understand the complex energy dissipation and viscoelastic dynamics of the dual-crosslinked hydrogels.
CARBOHYDRATE POLYMERS
(2021)
Article
Energy & Fuels
Larisa A. Strelets, Sergey O. Ilyin
Summary: The study investigated the viscosity and viscoelastic properties of oil samples to determine their gelation and glass transition temperatures. It was found that oilfield treatment can impact the viscosity, gelation, and composition of heavy crude oil.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Engineering, Chemical
Hang Yang, Yunli Liu, Guoliang Bai, Rugang Liao, Yi Zhang, Shibin Xia
Summary: The study investigated the adsorption kinetics, isotherms, and thermodynamic processes of tamoxifen (TMX) on SDS-modified oil-based drill cutting ash (OBDCA). The adsorption process was found to follow pseudo-second-order and Langmuir models, with an adsorption capacity of 107 mg/g. The adsorption behavior of TMX on OBDCA was spontaneous and exothermic.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
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
Construction & Building Technology
Yu Liu, Zengqi Zhang, Rui Jing, Peiyu Yan
Summary: The study revealed that the interaction between sodium citrate and PCE has complex effects on the rheological properties of fresh cement paste, with different dosages leading to synergistic or antagonistic effects. Additionally, the fluidity of the paste generally improves with time, except in cases of high dosage of sodium citrate. The adsorption behavior of citrate and PCE plays a key role in determining the rheological properties and viscoelasticity of the paste.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Polymer Science
Guoying Jiao, Shijie Zhu, Zhongbin Ye, Zheng Shu, Xijin Wang, Daming Wang
Summary: Polymer flooding, a technique used to recover oil from depleted reservoirs, is hindered by poor performance caused by shearing during injection. An experimental evaluation studied the influence of shearing on rheological properties, viscoelasticity, hydrodynamic size, static adsorption, and seepage characteristics of the polymer solution. Results showed that shear had an irreversible effect on the polymer, damaging its properties. However, hydrophobic association allowed the polymer to recover its solution properties after a critical associating concentration, improving shear resistance and achieving effective flow resistance during porous media seepage and mobility control. Augmenting intermolecular forces to enhance shear resistance is proposed to develop new polymer systems for oil displacement.
Article
Engineering, Chemical
Chandan Sahu, Siddhant Kumar Prasad, Rajnish Kumar, Jitendra S. Sangwai
Summary: The rheological properties of CO2 hydrate slurries with and without the surfactant SDS were studied. It was found that dissolved CO2 actively participated in the nucleation and growth of hydrate crystals at higher pressures. The addition of SDS reduced the peak and steady-state viscosities of the slurries and exhibited pseudoplastic behavior. The presence of SDS also delayed the dissociation of CO2 hydrates and improved their stability and flowability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Applied
Xia Zhao, Dong Li, Li-Jun Wang, Yong Wang
Summary: A high elastic starch-based emulsion gel was successfully fabricated using one-step heat-set gelation. The effect of oil content on the rheological behavior and microstructure of the gel was investigated, and it was found that the role of oil as filler shifted depending on the content.
CARBOHYDRATE POLYMERS
(2022)
Article
Engineering, Chemical
N. Eddaoui, M. Panfilov, L. Ganzer, B. Hagemann
Summary: One promising method for underground hydrogen storage involves converting H-2 and CO2 into methane with methanogenic bacteria. However, the accumulation of bacteria on pore walls can cause pore-clogging, which hinders the implementation of this idea.
TRANSPORT IN POROUS MEDIA
(2021)
Article
Chemistry, Multidisciplinary
Samhar Saleh, Elisabeth Neubauer, Ante Borovina, Rafael E. Hincapie, Torsten Clemens, Daniel Ness
Summary: The study revealed that the synergistic use of nanomaterials and alkali can reduce interfacial tension, improve oil-water emulsification, and potentially enhance oil recovery in oil fields.
Article
Energy & Fuels
Asad Elmgerbi, Gerhard Thonhauser, Alexander Fine, Rafael E. Hincapie, Ante Borovina
Summary: Predicting and evaluating formation damage is critical in completion operations. An experimental methodology for evaluating filter cake removal was presented in this study, which demonstrated the efficiency of polymer-based drilling fluids in cleaning filter cakes compared to potassium carbonate. Three key indicators were used to evaluate filter-cake removal efficiency and no clear correlation was found between filtrate volume and residual damage.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2021)
Article
Energy & Fuels
Calvin Lumban Gaol, Leonhard Ganzer, Soujatya Mukherjee, Hakan Alkan
Summary: This study examines the parameters influencing the efficiency of microbial enhanced oil recovery (MEOR) and their effects on oil displacement in microscale models. It provides insights into the mechanisms at the pore-scale and factors affecting MEOR performance in porous media.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Energy & Fuels
Johannes Steindl, Rafael E. Hincapie, Ante Borovina, Christoph Puls, Johann Badstoeber, Gerhard Heinzmann, Torsten Clemens
Summary: This article discusses the selection and analysis methods of polyacrylamide polymers used in chemical enhanced oil recovery (EOR) projects. The molecular weight distribution (MWD) of the polymers plays a crucial role in their performance. Conventional analysis methods are unable to accurately measure the MWD of high molecular weight polymers, while field-flow fractionation (FFF) technique provides a solution. FFF allows the determination of the MWD and can be used to optimize polymer selection and evaluate EOR effectiveness.
SPE RESERVOIR EVALUATION & ENGINEERING
(2022)
Article
Polymer Science
Rafael E. Hincapie, Ante Borovina, Elisabeth Neubauer, Muhammad Tahir, Samhar Saleh, Vladislav Arekhov, Magdalena Biernat, Torsten Clemens
Summary: This study investigates the wettability alterations through imbibition/flooding and their synergy with interfacial tension (IFT) for alkalis, nanoparticles, and polymers. It demonstrates the influence of the oil total acid number (TAN), chemical agents, and reservoir mineralogy on fluid-fluid and rock-fluid interactions. A laboratory evaluation workflow combining various assessments is used to evaluate wettability alteration, IFT changes, and recovery. The study provides novel data on the synergy of IFT, Amott imbibition, and core floods for the studied chemical processes.
Article
Chemistry, Multidisciplinary
Christian Scheurer, Rafael E. Hincapie, Elisabeth Neubauer, Astrid Metz, Daniel Ness
Summary: The interaction between silica nanostructured particles and sandstone rock was investigated using various experimental approaches. The highest adsorption was observed in brine with high ionic strength, and the addition of alkali reduced adsorption. Berea rock crushed material showed slightly higher adsorption compared to Keuper rock, and temperature had a minor effect on adsorption behavior. In core-flood experiments, there was no effect on permeability. The nanoparticles showed a delayed breakthrough compared to the tracer, with larger particles passing through the rock core faster. SEM images suggested that adsorption spots were defined by surface roughness rather than mineral type.
Article
Environmental Sciences
Muhammad Arif, Hamid M. Behzad, Muhammad Tahir, Changxiao Li
Summary: Developing tourism along river basins has benefits for both tourists and the economy, but it requires balancing between nature-based recreation and ecological functioning. This study investigates the impact of recreational activities and values on ecosystem functioning in high-order rivers, finding that ecosystem functioning is highest around tributaries. The findings suggest the need for zoning and raising public awareness to ensure sustainable use of natural resources.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Polymer Science
Ante Borovina, Rafael E. Hincapie, Torsten Clemens, Eugen Hoffmann, Jonas Wegner
Summary: This study uses micromodels, core floods, and Field-Flow Fractionation (FFF) evaluations to understand the behavior of polymers in heterogeneous reservoirs. Different layers of micromodels were constructed to simulate varying permeability, and core tests and FFF were performed to assess the injectivity and displacement efficiency of selected polymers. The results showed that polymers with narrower molecular weight distribution had better injectivity and lower retention.
Article
Polymer Science
Rafael E. Hincapie, Ante Borovina, Torsten Clemens, Eugen Hoffmann, Muhammad Tahir, Leena Nurmi, Sirkku Hanski, Jonas Wegner, Alyssia Janczak
Summary: This work presents various evaluations of key prior field applications, combining laboratory approaches to optimize the usage of polymers and alkali. The performance of AP floods can be optimized by adjusting the polymer viscosities during injection and aging in the reservoir. AP conditions not only reduce polymer retention in the reservoir but also result in significant cost savings. Lower-concentration polymer solutions aged in alkali show the same displacement efficiency as non-aged polymers with higher concentrations.
Article
Energy & Fuels
Christian Truitt Lueddeke, Calvin Lumban Gaol, Gion Joel Strobel, Leonhard Ganzer
Summary: This study used a brand new micromodel to evaluate its effectiveness in two-phase displacement experiments and validate the applicability of analytical solutions. The potential of the micromodel to visualize fluid flow behavior in porous media was also assessed.
Article
Energy & Fuels
Rafael E. Hincapie, Ante Borovina, Torsten Clemens, Eugen Hoffmann, Jonas Wegner
Summary: Alkali/polymer flooding of high--TAN oil is a promising enhanced oil recovery method. The emulsions generated in this system are thermodynamically unstable macroemulsions. Gas has a significant impact on the displacement efficiency in alkali projects and needs to be considered for accurate evaluation of incremental oil production. Experiments and analysis were conducted to understand the effects of alkali injection and the behavior of emulsions formed.
SPE RESERVOIR EVALUATION & ENGINEERING
(2022)
Article
Engineering, Environmental
Calvin Lumban Gaol, Leonhard Ganzer, Soujatya Mukherjee, Hakan Alkan
Summary: The study investigated the impact of bacteria and their metabolism products on clogging in porous media using micromodels under high pressure, high temperature, and anaerobic conditions. Results showed in situ bacteria growth, biomass accumulation, biofilm formation, and gas production in the micromodels. Real-structure micromodels demonstrated a more significant impact of biomass straining in small pore throats on permeability reduction compared to artificial-structure micromodels.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2021)
