Article
Energy & Fuels
Sthefany Z. S. do Amparo, Claudia K. B. de Vasconcelos, Aline I. A. R. Almeida, Laryssa E. B. Sena, Meiriane C. F. S. Lima, Felipe S. Medeiros, Vinicius Caliman, Glaura G. Silva, Marcelo M. Viana
Summary: The article introduces an innovative preformed particle gel (PPG) reinforced with carbon nanomaterials for enhanced oil recovery. The experimental results show that the gel cross-linked with carbon nanomaterials has a strong blocking effect and stability.
Article
Engineering, Environmental
Buddhabhushan Salunkhe, Thomas Schuman, Ali Al Brahim, Baojun Bai
Summary: This paper describes the development and evaluation of a unique hydrogel composition with ultrahigh temperature resistance for chemical enhanced oil recovery. The hydrogel demonstrated exceptional thermal stability and swelling behavior in different ionic strengths, making it an ideal candidate for conformance control of reservoirs with harsh temperature and salinity conditions.
CHEMICAL ENGINEERING JOURNAL
(2021)
Review
Energy & Fuels
Mina Seidy Esfahlan, Elnaz Khodapanah, Seyyed Alireza Tabatabaei-Nezhad
Summary: The study focused on the application and performance evaluation of preformed particle gels (PPGs) in controlling high water production in mature oil reservoirs, and carefully examined the hybrid methods of PPG with other oil recovery enhancement methods.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Review
Energy & Fuels
Jianqiao Leng, Mingzhen Wei, Baojun Bai
Summary: This paper reviews the importance and application of preformed particle gel in controlling reservoir conformance in oilfields, covering the particle gel transport and retention mechanisms in experiments and numerical simulation models. It emphasizes the need for different models to simulate particle gel transport in open fractures and porous media with pore networks due to different transport and plugging mechanisms.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Energy & Fuels
Bobo Zhou, Wanli Kang, Hongbin Yang, Tongyu Zhu, Hongwen Zhang, Xinxin Li, Bauyrzhan Sarsenbekuly, Turtabayev Sarsenbek
Summary: In this study, an acid-resistant preformed particle gel (AR-PPG) was prepared using acrylamide, N,N'-methylene bisacrylamide, and dimethyldiallylammonium chloride through radical polymerization. The AR-PPG exhibited improved swelling, shearing resistance, and viscoelastic properties in acidic environments compared to conventional PPG. Furthermore, a conformance control system composed of AR-PPG dispersed in cationic polyacrylamide solution showed good dispersion stability and achieved a plugging rate of 70.8% in low permeability cores after supercritical CO2 flooding, providing a potential alternative material for plugging and conformance control in oilfields.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Review
Energy & Fuels
Dongmei Wang, Randall S. Seright
Summary: This paper reviews literature on the efficacy of floods with colloidal dispersion gels (CDGs) compared to polymer floods for oil recovery. The conclusion suggests that CDGs do not provide better results than polymer floods, and highlights the misleading claims made about CDGs' effectiveness.
Article
Polymer Science
Yanfu Pi, Jinxin Liu, Ruibo Cao, Li Liu, Yingxue Ma, Xinyang Gu, Xianjie Li, Xinyu Fan, Mingjia Zhao
Summary: A heterogeneous composite flooding system, which combines preformed particle gels (PPG) and polymers, has been developed to improve the production of remaining hydrocarbon after tertiary recovery. The performance of this system was evaluated using an oil saturation monitoring device and a large-scale 3D physical model. The evaluation results indicate that the heterogeneous composite flooding system has better viscosity, stability, and elasticity compared to a single polymer system. Furthermore, both systems exhibit pseudoplastic fluid characteristics and follow the principle of shear thinning. Seepage experiments showed that PPG migrates alternately in porous media, resulting in piling plugging-pressure increasing-deformation migration. The heterogeneous composite system can migrate to the depths of the oil layer, improving the injection profile. In visualization experiments, the system preferentially flowed into the high-permeability layer, increasing seepage resistance and forcing subsequent fluid to flow into the medium and low permeability layers. The average saturation of the high, medium, and low permeability layers decreased by 4.74%, 9.51%, and 17.12%, respectively, and the recovery factor was further improved by 13.56% 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: 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
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
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
Chemistry, Physical
Huiyu Wang, Bei Wei, Jian Hou, Yongsheng Liu, Qingjun Du
Summary: This study used microfluidics to observe the fluid flow phenomenon in blind-ends and analyzed the oil displacement mechanism in blind-ends. The results showed that the width of blind-ends affected the displacement efficiency, and heavy oil was more difficult to displace. Polymer flooding and surfactant reduced capillary force and improved the displacement of light oil.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Energy & Fuels
Vikas Kumar Sharma, Anugrah Singh, Pankaj Tiwari
Summary: We quantitatively analyze the pore-scale flow dynamics and displacement behavior of heavy oil recovery at the micro and macro-scale to optimize different chemical flooding processes. Our study reveals the effects of low saline water flooding, polymer flooding, and alkali-polymer solution injection on oil recovery. Furthermore, core flooding experiments show that simultaneous injection of chemical slugs yields higher heavy oil recovery compared to separate injection.
Review
Energy & Fuels
Perekaboere Ivy Sagbana, Ahmad Sami Abushaikha
Summary: This paper provides a comprehensive review of the application of polymer gel, foam and emulsion for conformance control in oil recovery. It discusses various aspects of these chemical-based conformance control methods such as mechanisms, properties, applications, experimental and numerical studies, and parameters affecting successful field application. The recent advances in chemical-based conformance control agents are also highlighted.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2021)
Article
Polymer Science
Mina Seidy Esfahlan, Elnaz Khodapanah, Seyyed Alireza Tabatabaei-Nezhad, Mehdi Salami-Kalajahi
Summary: A new method for synthesizing PPG with nanogels inside them at high temperature and high salinity conditions was introduced in this study. The new PPG showed higher water absorbance capacity and swelling rate compared to ordinary PPG, making it suitable for deep reservoir conformance control.
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.
