Research on the Reservoir Adaptability and Oil Displacement Mechanism of a New Soft Microgel Particle Dispersion System

2020 ◽  
Author(s):  
Zhe Sun ◽  
Xiaodong Kang ◽  
Risu Na ◽  
Jun Zhou
Keyword(s):  
Particle Dispersion ◽  
Microgel Particle ◽  
Displacement Mechanism ◽  
Oil Displacement ◽  
Dispersion System

Study on the Oil Displacement Effect and Application of Soft Microgel Flooding Technology

2021 ◽  
Author(s):  
Jian Zhang ◽  
Zhe Sun ◽  
Xiujun Wang ◽  
Xiaodong Kang
Keyword(s):  
Phase Separation ◽  
Particle Dispersion ◽  
Field Application ◽  
Particle Phase ◽  
Displacement Effect ◽  
Microgel Particle ◽  
Oil Displacement ◽  
And Migration ◽  
Swept Volume ◽  
Poros Media

Abstract Due to the reservoir heterogeneity, there is still a lot of remaining oil that cannot be displaced by water flooding. Therefore, taking the whole injection-production flow field as the research object, the dominant channel is divided into macro and micro channel. Then the corresponding oil displacement system is adopted to realize the continuous flow diversion and effective expansion of swept volume. For micro channels, the soft microgel particle dispersion can be used. It is a novel flooding system developed in recent years. Due to its excellent performance and advanced mechanism, the oil recovery rate can be greatly improved. Soft microgel particle dispersion consists of microgel particles and its carrier fluid. After coming into porous media, its unique phenomenon of particle phase separation appears, which leads to the properties of "plugging large pore and leave the small one open", and the deformation and migration characteristic in the poros media. Therefore, particle phase separation of soft microgel particle dispersion is studied by using the microfluidic technology and numerical simulation. On this basis, by adopting the NMR and 3D Printing technology, the research on its oil displacement mechanism is further carried out. Furthermore, the typical field application cases are analyzed. Results show that, soft microgel particles have good performance and transport ability in porous media. According to the core displacement experiment, this paper presents the matching coefficient between microgels and pore throat under effective plugging modes. Also, the particle phase separation happens when injecting microgels into the core, which makes the particles enter the large pore in the high permeability layer and fluid enters into small pore. Therefore, working in cooperation, this causes no damage to the low permeability layer. On this basis, theoretically guided by biofluid mechanics, the mathematical model of soft microgel particle is established to simulate its concentration distribution, which obtained the quantitative research results. Furthermore, the micro displacement experiment shows that, microgels has unique deformation and migration characteristic in the poros media, which can greatly expand swept volume. The macro displacement experiment shows that, microgels have good oil displacement performance. Finally, the soft microgel particle dispersion flooding technology has been applied in different oilfields since 2007. Results show that these field trials all obtain great oil increasing effect, with the input-output ratio range of 2.33-14.37. And two field application examples are further introduced. Through interdisciplinary innovative research methods, the oil displacement effect and field application of soft microgel particle dispersion is researched, which proves its progressiveness and superiority. The research results play an important role in promoting the application of this technology.

scholarly journals Stability, rheological property and oil-displacement mechanism of a dispersed low-elastic microsphere system for enhanced oil recovery

RSC Advances ◽  
2017 ◽  
Vol 7 (14) ◽  
pp. 8118-8130 ◽  
Author(s):  
Hongbin Yang ◽  
Wanli Kang ◽  
Hairong Wu ◽  
Yang Yu ◽  
Zhou Zhu ◽  
...  
Keyword(s):  
Rheological Property ◽  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Shear Thickening ◽  
Microstructure Change ◽  
Displacement Mechanism ◽  
Oil Displacement ◽  
Internal Forces ◽  
Thickening Behavior

The dispersed low-elastic microsphere system shows shear-thickening behavior because of the microstructure change and the interaction of internal forces.

scholarly journals Experimental Study on Oil Displacement Mechanism

2018 ◽  
Vol 113 ◽  
pp. 012103
Author(s):  
Yanfu Pi ◽  
Hongzhi Shao ◽  
Yanming Pi ◽  
Li Liu
Keyword(s):  
Experimental Study ◽  
Displacement Mechanism ◽  
Oil Displacement

scholarly journals Influence of stability of polymer surfactant on oil displacement mechanism

2018 ◽  
Vol 113 ◽  
pp. 012135
Author(s):  
Li Liu ◽  
Chengliang Li ◽  
Yanming Pi ◽  
Di Wu ◽  
Ying He ◽  
...  
Keyword(s):  
Displacement Mechanism ◽  
Oil Displacement ◽  
Polymer Surfactant

Research of the heavy oil displacement mechanism by using alkaline/surfactant flooding system

2013 ◽  
Vol 434 ◽  
pp. 63-71 ◽  
Author(s):  
Lifeng Chen ◽  
Guicai Zhang ◽  
Jijiang Ge ◽  
Ping Jiang ◽  
Jinyu Tang ◽  
...  
Keyword(s):  
Heavy Oil ◽  
Surfactant Flooding ◽  
Displacement Mechanism ◽  
Oil Displacement
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