The impact of graphene oxide particles on viscosity stabilization for diluted polymer solutions using in enhanced oil recovery at HTHP offshore reservoirs

Abstract

Over 60% of the original oil in a place (OOIP) is retained in a reservoir after conventional methods have been exploited. Application of enhanced oil recovery (EOR) technology gives an additional chance to get out possibly about 20% more oil from the reservoir. The use of watersoluble polymers improves the water-oil mobility ratio, therefore, the displacement efficiency increased, and leads to enhanced oil recovery. High-molecular-weight polyacrylamide group is widely and successfully used in EOR. But no commercial polymer composition can be used in conditions of high temperature and hardness brine offshore reservoirs yet. To avoid the time consumption and high expense for selection and synthesis of the appropriate-structural polymer for EOR application, we attempt to find additives to enhance the thermal stability of polymer solutions. In this paper, we report the results of improved viscosity stability of diluted polymer/ seawater solutions aged at reservoir conditions for 31days by adding graphite-oxide particles (GOs). In the presence of 300 ppm of GOs, the viscosity stability of 1700 ppm acrylamide-based polymer in sea water solution increases from 92 °C to 135 °C. FESEM pictures show good distribution of GOs in polymer network, which is a result of integration of functional groups in GOs surfaces and hydrophilic polymer chains.

Porous Graphene Composite Polymer Fibres

“…This is a phenomenon which is not commonly seen; the increase of concentration generally leads to an increase in viscosity. One explanation for the reduction in polymer viscosity could be that it is due to the presence of radical degeneration from the PG, which happens when produced radicals react with the polymer backbone, resulting in a reduction of molecular weight [ 37 ]. A study into the viscosity of graphene oxide nanoparticles dispersed in water however, did not observe the reduction of viscosity with an increase in graphene concentration [ 38 ].…”

Immobilization of Graphene Oxide on the Permeate Side of a Membrane Distillation Membrane to Enhance Flux

“…It was observed that the presence of GO provided additional thermal stability of the modified membrane. Increasing in the thermal stability of GOIM-P could be due to GO particles and the functional groups on GO that play the role as a reducing and sacrificed agent that lead to slow down or limit the degradation process [ 51 ]. The result is in line with what we have reported previously [ 32 , 36 ].…”

Improved rheology and high‐temperature stability of hydrolyzed polyacrylamide using graphene oxide nanosheet

“…in enhancing the mechanical properties of chemically crosslinked poly(acrylic acid) . In advanced drilling fluid, GO is also used as an additive for fluid‐loss control, as a viscosity modifier for EOR or as a crude oil/water emulsion systems stabilizer. Although previous research proclaimed the use of GO as a reinforcing nanofiller of PAM, but PAM itself has less tolerance to high salinity and high temperature (HSHT) compared to the HPAM.…”