Article
Materials Science, Multidisciplinary
D. Luo, Z. Ren
Summary: Conventional light oil reserves are depleting, leading to a worldwide demand for recovery of viscous oil to meet energy needs. The new nanofluid technology can effectively recover crude oil at room temperature, with multi-stage injection proving superior to single injection.
MATERIALS TODAY PHYSICS
(2021)
Article
Polymer Science
Mifa Chen, Wuhua Chen, Yefei Wang, Mingchen Ding, Zhenyu Zhang, Dongdong Liu, Dihao Mao
Summary: In this study, an amphiphilic polymer PTVR was synthesized, which showed satisfactory viscosity reduction and recovery of heavy oil. The synergistic effect of the functional monomers MAUPy and LMA contributed to the superior performance of PTVR. PTVR exhibited higher viscosity reduction rate and recovery rate compared to other polymers.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Chemistry, Applied
Chenhui Wang, Lingyu Gao, Menghui Liu, Shuqian Xia, You Han
Summary: This study investigated the mechanisms of viscosity reduction of functionalized SiO2 nanoparticles in heavy oil using molecular dynamics simulation. It was found that increasing surface lipophilicity or grafting density enhances adsorption of asphaltene and reduces interfacial tension, leading to viscosity reduction in heavy oil.
FUEL PROCESSING TECHNOLOGY
(2022)
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
Thermodynamics
Chaohui Lyu, Liguo Zhong, Qing Wang, Wei Zhang, Xiaodong Han, Mingqiang Chen, Yu Zhu, Jiawang Yang
Summary: In this study, static tests and core experiments were conducted to evaluate the production performance of heavy oil using low viscosity oil as injection. The results indicate that 30% is the optimal dilution ratio considering economy and efficiency. The study demonstrates the promising strategy of low viscosity oil injection on enhancing heavy oil recovery.
Article
Energy & Fuels
Rohan M. Jadhav, Ganesh Kumar, N. Balasubramanian, Jitendra S. Sangwai
Summary: This study investigates the synergistic effect of nickel nanoparticles and solvent tetralin on the rheological properties and composition of extra-heavy crude oil, revealing that the addition of 0.2 wt% nickel nanoparticles can significantly reduce the viscosity of oil. Aquathermal upgrading of EHO was conducted with nanoparticles, confirming the catalytic properties of nickel nanoparticles in upgrading EHO through tests such as FT-IR, GC-MS, and SARA characterization. Additionally, a new mechanism describing the dynamics of nickel nanoparticles in contact with asphaltene clusters has been proposed for better understanding.
Article
Engineering, Environmental
Mifa Chen, Yefei Wang, Wuhua Chen, Mingchen Ding, Zhenyu Zhang, Chuhan Zhang, Shizhang Cui
Summary: Functional polymers play a significant role in oilfield development. In this study, a side-chain functionalized copolymer APVR was fabricated using a functional monomer BMP and DHM. The structure of APVR was characterized using various analyses and its viscosity reduction and heavy oil displacement performance were studied. The results showed that APVR exhibited higher viscosity reduction rate and ultimate recovery of heavy oil compared to other copolymers. The unique structure of BMP and DHM allowed them to interact with heavy oil, reducing intermolecular forces and promoting emulsification. APVR shows promising potential for reducing heavy oil viscosity and has broad application prospects in heavy oil exploitation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Polymer Science
Dongtao Fei, Jixiang Guo, Ruiying Xiong, Xiaojun Zhang, Chuanhong Kang, Wyclif Kiyingi
Summary: The study successfully reduced heavy oil viscosity and enhanced recovery rate using the PAALB polymer. Through a series of tests, it was found that PAALB can reduce heavy oil viscosity, improve oil-water displacement, and induce spontaneous emulsification of heavy oil, thereby increasing recovery rate.
Article
Engineering, Chemical
Rui Guo, Wei Fu, Le Qu, Yongfei Li, Weihua Yuan, Gang Chen
Summary: In this study, Fe(III) oleate was used as a catalyst and methanol was introduced as a hydrogen donor in aquathermolysis. The results showed that methanol can increase the viscosity reduction rate of aquathermolysis. The addition of methanol promoted the breakage of long-chain alkanes in heavy oil, decreased the content of asphaltene and resin, and improved the fluidity of oil samples.
Article
Chemistry, Physical
Tianmeng Lei, Yefei Wang, Heng Zhang, Jie Cao, Chuanmin Xiao, Mingchen Ding, Wuhua Chen, Mifa Chen, Zhenyu Zhang
Summary: In this study, a branched functional polymer (PEM) was synthesized to tackle the chromatographic separation problem in surfactant-polymer composite systems and achieve efficient displacement of heavy oil in oil reservoir conditions. The results demonstrated that PEM exhibited superior thickening performance, viscosity reduction ability, and recovery factor compared to linear functional polymer PXM and conventional polymer HPAM, highlighting its potential application in enhancing heavy oil recovery.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Engineering, Environmental
Lei He, Yong Dai, Yanxin Gao, Daishuo Zhang, Juqing Cui, Jun Zhang, Haomiao Zhu, Jian Shen, Jingjie Hou
Summary: In this study, a carrier was designed to immobilize Bacillus subtilis for heavy oil exploitation, which reduced the chemical oxygen demand (COD) of oilfield wastewater and heavy oil viscosity. Orthogonal tests determined the ideal conditions for immobilizing Bacillus subtilis, and the carrier showed excellent potential for use in the oil field. It effectively enhanced the recovery of heavy oil and was environmentally friendly and cost-effective.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
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
Energy & Fuels
Chao Ma, Xingyu Liu, Longlong Xie, Yan Chen, Wendong Ren, Wen Gu, Minghua Zhang, Huili Zhou
Summary: The molecular dynamics simulation revealed that the addition of the new amphiphilic low molecular weight viscosity reducer into heavy oil altered the potential energy, non-potential energy, density, and hydrogen bond distribution of heavy oil. The strong polar groups in the molecular structure gradually disassembled the network structure of heavy oil from the inside out, leading to a reduction in viscosity.
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.
Review
Chemistry, Physical
Hui Ke, Meihe Yuan, Shuqian Xia
Summary: This article summarizes the recent progress in using nanomaterials for heavy oil viscosity reduction, including the properties and application conditions of different nanomaterials, as well as the possible mechanisms for reducing oil viscosity. The article points out that the application of nanomaterials in the petroleum industry has great potential.
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
(2022)
Review
Energy & Fuels
Lashun Thomas, Hansong Tang, Dilhan M. Kalyon, Seda Aktas, J. Daniel Arthur, Jens Blotevogel, J. William Carey, Archie Filshill, Pengcheng Fu, Grace Hsuan, Thomas Hu, Daniel Soeder, Subhash Shah, Radisav D. Vidic, Michael H. Young
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2019)
Article
Mechanics
Yijin Zeng, Xiaochun Jin, Shidong Ding, Baoping Zhang, Xiaobing Bian, Subhash Shah, John McLennan, Jean-Claude Roegiers
ENGINEERING FRACTURE MECHANICS
(2019)
Article
Energy & Fuels
Abhishek Govindu, Ramadan Ahmed, Subhash Shah, Mahmood Amani
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2019)
Article
Energy & Fuels
Vineet Sinha, Ramadan Ahmeda, Tarek Akhtar, Subhash Shah, Mahmood Amani
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2019)
Review
Chemistry, Multidisciplinary
Achinta Bera, Jatin Agarwal, Maunish Shah, Subhash Shah, Rakesh Kumar Vij
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2020)
Article
Energy & Fuels
Yuxing Wu, Harshkumar Patel, Saeed Salehi, Mehdi Mokhtari
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2020)
Article
Chemistry, Physical
Achinta Bera, Subhash Shah, Maunish Shah, Jatin Agarwal, Rakesh Kumar Vij
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2020)
Article
Materials Science, Characterization & Testing
Shawgi Ahmed, Harshkumar Patel, Saeed Salehi
Article
Energy & Fuels
Shawgi Ahmed, Harshkumar Patel, Saeed Salehi
Summary: The importance of an intact cement sheath for maintaining well integrity is discussed in this paper, along with the analysis of mechanical integrity and failure risks of the cement sheath. Through finite element modelling, factors such as different pressure conditions, cement and pipe properties, wait-on-cement intervals, and liner setting depths are studied for their impact on cement sheath integrity.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Review
Energy & Fuels
Maunish Shah, Jatin R. Agarwal, Dipal Patel, Jaydeepkumar Chauhan, Dhruvin Kaneria, Subhash N. Shah
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2020)
Article
Energy & Fuels
Yuxing Wu, Harshkumar Patel, Saeed Salehi
Summary: This study investigated the influences on cement sheath, including heat flow direction, temperature difference, cement properties, and casing pressure. The results showed that heat transfer from the formation to the casing has a more detrimental effect on cement integrity.
Article
Engineering, Mechanical
Harshkumar Patel, Saeed Salehi
Summary: This study aims to assess the fitness-for-service of cement sheath, specifically in the context of shallow depth liner-casing overlaps in offshore wells. Results indicate that cement material properties and wellbore pressure are major factors influencing the structural integrity of cement. The study suggests that flexible and expanding cement are more likely to withstand structural failure compared to brittle and nonexpanding cement.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Energy & Fuels
Shawgi Ahmed, Harshkumar Patel, Saeed Salehi, Ramadan Ahmed, Catalin Teodoriu
Summary: Geothermal well construction typically includes a slotted production liner with a dual barrier system designed to maintain well integrity. However, exposure to acidic gases like H2S and CO2 can compromise the integrity of the barrier elements, impacting hydraulic and mechanical performance. Experimental and numerical studies indicate that CO2 exposure can affect the hydraulic integrity of seal elements and compromise the mechanical integrity of cement, highlighting the importance of proper barrier design and material selection for well integrity in geothermal wells.
Article
Energy & Fuels
S. Hari, Shanker Krishna, Laxmi Nandan Gurrala, Sanjeev Singh, Nikhil Ranjan, Rakesh Kumar Vij, Subhash N. Shah
Summary: Hydraulic fracturing is an effective tool for stimulating reservoirs and ensuring economic gas production. The use of proppants to maintain fracture conductivity is crucial in this process. This paper reviews experimental studies on sandstone formations to analyze factors intensifying proppant crushing and embedment, with a focus on maintaining fracture conductivity.
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2021)
Article
Energy & Fuels
Maunish Shah, Subhash N. Shah
Summary: In hydraulic fracturing, using chemical particulates helps achieve uniform distribution of treatment fluid. The bridging and sealing mechanisms create an impermeable diverter plug, with 60% 7 mesh and 40% 60 mesh particles recommended for near-wellbore diversion. Incorporating a new model into fracturing design simulator can help estimate treating pressure increase for unstimulated zones and analyze fluid diversion effectiveness.
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2021)