Article
Polymer Science
Liang-Liang Wang, Teng-Fei Wang, Jie-Xiang Wang, Hai-Tong Tian, Yi Chen, Wei Song
Summary: The study developed a composite gel foam plugging system and evaluated its performance in static injection, dynamic profile control, and oil displacement. A technical boundary chart for plugging systems in heterogeneous reservoirs was proposed, and the research results showed that the adsorption effect of microspheres on the gel particles was potent. The enhanced foam with gel exhibited better performance in plugging control and flooding compared to the composite gel system.
Article
Engineering, Petroleum
Shaofei Kang, Chunsheng Pu, Kai Wang, Xu Li, Na Zhang, Dong Yan, Feifei Huang
Summary: This study investigates the feasibility and influencing factors of oil-soluble particulate temporary plugging agent-assisted water huff 'n' puff (TAWHP) in enhancing oil recovery. Experimental results show that TAWHP can improve oil recovery compared to traditional water huff 'n' puff process. The mathematical model suggests that injection time, diversion index, and huff 'n' puff cycle have an impact on TAWHP's EOR performance.
Article
Chemistry, Physical
Zhoujie Wang, Zijian Cao, Songyan Li, Shaopeng Li
Summary: This study investigates the flow state of a foam system and analyzes the optimal plugging conditions of three-phase foam through resistance factors in sandpack flooding experiments. The research shows that three-phase foam is stable and capable of effective plugging. The highest oil recovery is achieved at a permeability ratio of 9.99 with an oil recovery factor of 80.87%. Three-phase foam flooding has promising application prospects.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Polymer Science
Yanfu Pi, Xinyu Fan, Li Liu, Mingjia Zhao, Linxiao Jiang, Guoyu Cheng
Summary: An adaptive oil displacement system (ASP-PPG) was proposed to enhance the recovery efficiency of heterogeneous reservoirs after polymer flooding. The system showed robust stability, enhanced mobility, effective plugging capability, and profile improvement capability. It successfully passed through the core and effectively blocked large pores, resulting in an 18.4% recovery increment after polymer flooding.
Article
Energy & Fuels
Shengen Chen, Jie Li, Sen Chen, Junhui Qin, Guiqi Wang, Yonggang Yi, Liwei Zhang, Rui Wang, Daoyi Zhu
Summary: High-performance CO2-improved oil recovery and storage technology is a promising measure for global oilfield companies to achieve zero carbon targets. This study investigates the CO2 conformance control performance of different plugging systems in sandstone cores. The results show that polymer gel systems have the highest plugging efficiency and gas production reduction rate among the single-plugging systems. The combined plugging systems, especially those containing polymer gels, exhibit excellent CO2 conformance improvement and oil recovery performance.
Article
Energy & Fuels
Shengen Chen, Jie Li, Sen Chen, Junhui Qin, Guiqi Wang, Yonggang Yi, Liwei Zhang, Rui Wang, Daoyi Zhu
Summary: This paper studies the CO2 conformance control performance of different single and combined plugging systems in long sandstone cores through high-temperature and high-pressure experiments. The results show that the gel system has the best plugging effect, with a plugging efficiency of 86.13% and a gas production reduction rate of 95.71%. The combined plugging systems containing gels have higher plugging efficiency, and their gas production reduction ratios reach around 90%. The research results provide experimental understanding and theoretical guidance for solving the CO2 channeling problem.
Article
Chemistry, Multidisciplinary
Dayan L. Buitrago-Rincon, Veronique Sadtler, Ronald A. Mercado, Thibault Roques-Carmes, Philippe Marchal, Samuel F. Munoz-Navarro, Maria Sandoval, Julio A. Pedraza-Avella, Cecile Lemaitre
Summary: The effect of silica nanoparticles (NP-SiO2) in xanthan gum (XG) solutions was investigated in this study. The addition of nanoparticles showed a slight effect on the viscosity of the fluids, which became more remarkable over time. Interfacial tension tests measured in water-mineral oil systems did not find any effect on the interfacial properties with the addition of polymer or nanoparticles. Three core flooding experiments were conducted using sandstone core plugs and mineral oil, and the nanofluid formulation recovered about 13% of the residual oil, almost double that of the original XG solution.
Article
Polymer Science
Yanfu Pi, Zailai Su, Ruibo Cao, Bo Li, Jinxin Liu, Xinyu Fan, Mingjia Zhao
Summary: This study focuses on using a newly developed precrosslinked particle gel (PPG) combined with alkali surfactant polymer (ASP) to improve the efficiency of heterogeneous system flooding after polymer flooding in Daqing Oilfield. The addition of PPG particles enhances the viscoelasticity of the ASP system and reduces the interfacial tension between the heterogeneous system and crude oil. The experimental results show that employing PPG/ASP heterogeneous flooding after polymer flooding effectively plugs high-flow seepage channels and improves oil washing efficiency.
Article
Engineering, Chemical
Tengfei Wang, Liangliang Wang, Wei Song, Haiming Fan, Alexey Cheremisin, Chengdong Yuan
Summary: AMPS/AM@SiO2 microgel particles were synthesized to achieve good performance in in-depth profile control treatment. The particles showed remarkable temperature and salinity tolerance and improved compression strength and elastic modulus when 1.0 wt % nano-SiO2 was added. The particles also exhibited good plugging performance and oil displacement in parallel sand-packed tubes.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Physical
Yingrui Bai, Qitao Zhang, Jinsheng Sun, Xiaosen Shang, Kaihe Lv, Feng Wang
Summary: The study on the filtration behavior of polymer/chromium gel in fractures revealed the disproportionate filtration behaviors of the gel components, with polymer molecules significantly impacting the filtration degree of Cr3+. Increasing polymer concentration, injection pressure differential, fracture width, and decreasing matrix permeability all affect the filtration degree of Cr3+, providing theoretical reference for enhancing the water plugging performance of polymer gel in hydraulic fractured formations.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Energy & Fuels
Guo Jianchun, Zhan Li, Qi Tianjun, Liu Yuxuan, Wang Xin, Chen Chi, Gou Xinghao
Summary: Using a visualized experimental device, the plugging behaviors of temporary plugging particles of different sizes and concentrations in hydraulic fractures were analyzed under varying fluid displacements and viscosities. The results showed that higher carrier fluid viscosity and displacement made it more difficult to form a plugging layer, while larger particle size and concentration made it easier. The formation of the plugging layer was primarily controlled by the particle concentration and fluid viscosity when the particle size to fracture width ratio was 0.45, and stable plugging layer formation required a concentration above 20 kg/m(3) and viscosity below 3 mPa.s. When the ratio was 0.60, stable plugging layer formation required a concentration above 10 kg/m(3). When the ratio was 0.75, the formation of the plugging layer was not significantly affected by other parameters and could form a stable plugging layer under the experimental conditions.
PETROLEUM EXPLORATION AND DEVELOPMENT
(2023)
Article
Energy & Fuels
Ke Tang, Zhenghao Su, Yong Zhao, Hui Xie, Hongjun Zhang, Zenghao Xu, Chenyang Shi, Guiqi Wang, Daoyi Zhu
Summary: This study investigates the high-strength preformed particle-gel (HSPPG) as a potential solution for the conformance improvement of heterogeneous conglomerate reservoirs. The HSPPG demonstrates strong water swelling and sticking-together ability, as well as good viscoelasticity. It forms high-strength adhesive bonds on rock surfaces and enhances oil recovery in fractured conglomerate rock cores.
Article
Energy & Fuels
Laura M. Corredor, Maria C. Ruiz-Canas, Jorge A. Rojas, Sebastian Llanos, Ruben-Hernan Castro-Garcia, Henderson I. Quintero, Eduardo Manrique, Arnold R. Romero Bohorquez
Summary: This study involves the surface modification of silica nanoparticles with 3-amino-propyltriethoxysilane and hydrolyzed polyacrylamide to prepare a nanopolymer solution. Core flooding experiments showed that the nanopolymer solution reduces capillary forces and increases viscous forces compared to HPAM solution, leading to an increase of 2.2%OOIP in cumulative oil recovery.
Article
Environmental Sciences
Francesco Ricceri, Giulio Farinelli, Mattia Giagnorio, Aurora Zamboi, Alberto Tiraferri
Summary: Polymer flooding is an enhanced oil recovery technique used to extract residual oil from conventional extraction methods, but managing produced water with residual HPAM poses challenges due to high viscosity and organic content. Common treatment methods are not efficient, and innovative techniques are not yet practical. A study found that polymer precipitation induced by divalent ions can effectively improve HPAM removal efficiency.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Engineering, Petroleum
Xindi Sun, Baojun Bai, Ali Khayoon Alhuraishawy, Daoyi Zhu
Summary: This study investigated the plugging performance of HPAM-Cr(III) polymer gel in CO2 flooding reservoirs through laboratory experiments and numerical analysis. It was found that the polymer gel has higher breakthrough pressure in low-permeability cores, with a greater reduction in permeability to water compared to that to CO2. The disproportionate permeability reduction was more prominent in low-permeability cores.
