The scaling exponents of polyacrylamide and acrylamide‐sodium acrylate copolymer gels

1993 ◽  
Vol 99 (9) ◽  
pp. 7108-7114 ◽  
Author(s):  
Zhibing Hu ◽  
Chunfang Li ◽  
Yong Li
Keyword(s):  
Sodium Acrylate ◽  
Scaling Exponents ◽  
Acrylate Copolymer ◽  
Copolymer Gels

Collapse and swelling of poly(N-isopropylacrylamide-co-sodium acrylate) copolymer brushes grafted on a flat SiO2 surface

2006 ◽  
Vol 44 (4) ◽  
pp. 770-778 ◽  
Author(s):  
He Cheng ◽  
Guangming Liu ◽  
Chengqing Wang ◽  
Guangzhao Zhang ◽  
Chi Wu
Keyword(s):  
Sodium Acrylate ◽  
Sio2 Surface ◽  
Acrylate Copolymer ◽  
Copolymer Brushes

New phase diagram for N‐arylacrylamide/acrylamide/sodium acrylate copolymer gel

1995 ◽  
Vol 102 (4) ◽  
pp. 1846-1850 ◽  
Author(s):  
Seiji Katayama ◽  
Masanori Shimizu ◽  
Yukio Akahori
Keyword(s):  
Phase Diagram ◽  
Sodium Acrylate ◽  
Acrylate Copolymer ◽  
New Phase

scholarly journals Effect of Nanoparticles with Different Chemical Nature on the Stability and Rheology of Acrylamide Sodium Acrylate Copolymer/Chromium (III) Acetate Gel for Conformance Control Operations

Nanomaterials ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 74 ◽  
Author(s):  
Saray Pérez-Robles ◽  
Cristian A. Matute ◽  
Jeison R. Lara ◽  
Sergio H. Lopera ◽  
Farid B. Cortés ◽  
...  
Keyword(s):  
Oil Recovery ◽  
Preferential Flow ◽  
Gelation Time ◽  
Sodium Acrylate ◽  
Al2o3 Nanoparticles ◽  
Chemical Flooding ◽  
Acrylate Copolymer ◽  
Cr2o3 Nanoparticles ◽  
Total Oil ◽  
Gel System

During enhanced oil recovery (EOR), reservoir heterogeneities and fluids distributions promote preferential flow channels formation. Therefore, different types of gels have been proposed to improve swept efficiency on chemical flooding by plugging high permeability zones. The purpose of this article is to evaluate the effect that nanotechnology has on the inhibition of syneresis and the rheological properties of the Acrylamide Sodium Acrylate Copolymer/Chromium (III) Acetate gel system for conformance applications in mature reservoirs. Thus, a methodology is proposed in four stages: First, (I) nanoparticles synthesis, and characterization, followed by (II) bottle tests to monitor gelation kinetics and syneresis degree at 70 °C, then (III) description of the rheological evaluation on static and dynamic conditions to calculate gelation time and viscoelastic modulus (G’ and G”), and finally (IV) the displacement test with the best gel system in the presence of nanoparticles. Results showed that the best nanoparticle was the chromium oxide (Cr2O3), which represented the lesser syneresis degree and increased gelation time. Syneresis of gel samples in the presence of Cr2O3 at day 30 was under 1% for gels prepared with 4000, 6000, and 8000 mg·L−1 of polymer, and polymer to crosslinker ratio (p/c) of 40:1. Regarding SiO2, MgO, and Al2O3 nanoparticles, results show an improvement of gel strength. However, their thermal stability in terms of syneresis was lower. Displacement test in a triple parallel Slim Tube was able to recover an additional 37% of oil of the total oil present in the sandpacks, confirming the effectivity of the system when 100 mg·L−1 of Cr2O3 nanoparticles are included.

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