Synthesis modified Magnetite quantum dot-based nanofluid as an engineered stable material to enhanced oil recovery in carbonated reservoirs with stuyding mechanisms

Abstract

Abstract Using optimal and environmentally friendly exploration and production technologies for oil reservoirs will be essential in the coming decades. Therefore, we synthesis new engineered low-cost fluids with natural components to study enhanced oil recovery in carbonate reservoir in real rock, fluids and harsh reservoir conditions (high salinity and temperature). This study used low-cost and available Iron oxide quantum dot-based particles synthesized at optimum temperature to have colloidal stability, low formation damage with economic and environmental friendly approach. Modified Magnetite quantum dots (MMQDs) is compared with PEs-decorated magnetite nanostructure particles (MMNPs). MMQDs characteristics were investigated with XRD, FTIR, ASAP, FSM,DLS, HDT, Contact angle, IFT, Amott Cell Tests, Core Flood and PD tests. Structural disjoining pressure, adsorption, and permeability impairment were investigated with different concentrations. We found that PEs can bind to surface modifiers and improve dispersion and the main and predominant mechanism of hydrophilic-modified-nanostructures was the ability of making carbonate rock to be oil-wet. Core flood results show that efficiency in oil recovery of MMQDs is higher than MNPs fluid in same concentrations and can reach 33.8%. With our flooding test derived data, it can probably be said that 53.6% of the decrease is related to mineral uptake and the remaining is related to magnetite irreversible adsorption. However, irreversible adsorption of our MMQDS-1000 ppm fluid is only 1.7% in the core scale; however the important role of injected brine, needs to be discussed in detail in future studies.