Fabrication of surfactant-biopolymer combined system with dual viscosity reduction and mobility controllability for heavy oil reservoirs

Zhao, Yilu; Zhang, Lin; Chang, Guodong; Chen, Huiqing; Lu, Hao; Zhao, Nan; Zhao, Changxi; Geng, C. Q.; Yang, Weili; Li, Zhe

doi:10.1016/j.molliq.2022.120777

Cited by 9 publications

(2 citation statements)

References 49 publications

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“…Adding appropriate water into the polymer solution adjusts the water solubility of the molecular polymer, and the fluidity of the water is reduced by increasing its viscosity. The crude oil comes out of the pore channel preferentially, and the strata water is retained in the primary pore channel as much as possible during the process of polymer flooding, thus improving oil recovery [35,36]. At the macroscopic level, it mainly depends on increasing the viscosity of the displacing fluid and reducing the mobility ratio between the displacing fluid and the displaced fluid, so as to expand the swept volume [37].…”

Section: Polymer Flooding Mechanism and Influencing Factorsmentioning

confidence: 99%

Mechanism and Performance Analysis of Nanoparticle-Polymer Fluid for Enhanced Oil Recovery: A Review

Sun,

Zhang,

et al. 2023

Molecules

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With the increasing energy demand, oil is still an important fuel source worldwide. The chemical flooding process is used in petroleum engineering to increase the recovery of residual oil. As a promising enhanced oil-recovery technology, polymer flooding still faces some challenges in achieving this goal. The stability of a polymer solution is easily affected by the harsh reservoir conditions of high temperature and high salt, and the influence of the external environment such as high salinity, high valence cations, pH value, temperature and its own structure is highlighted. This article also involves the introduction of commonly used nanoparticles, whose unique properties are used to improve the performance of polymers under harsh conditions. The mechanism of nanoparticle improvement on polymer properties is discussed, that is, how the interaction between them improves the viscosity, shear stability, heat-resistance and salt-tolerant performance of the polymer. Nanoparticle-polymer fluids exhibit properties that they cannot exhibit by themselves. The positive effects of nanoparticle-polymer fluids on reducing interfacial tension and improving the wettability of reservoir rock in tertiary oil recovery are introduced, and the stability of nanoparticle-polymer fluid is described. While analyzing and evaluating the research on nanoparticle-polymer fluid, indicating the obstacles and challenges that still exist at this stage, future research work on nanoparticle-polymer fluid is proposed.

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Section: Polymer Flooding Mechanism and Influencing Factorsmentioning

confidence: 99%

Mechanism and Performance Analysis of Nanoparticle-Polymer Fluid for Enhanced Oil Recovery: A Review

Sun,

Zhang,

et al. 2023

Molecules

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“…For example, 0.1 wt% fatty alcohol polyoxyethylene ether sulfate (SC) and 0.05 wt% xanthan gum (XG) were combined to develop a novel surfactant–polymer system. The results showed that the addition of XG into SC systems could obviously decrease the viscosity ratio of oil to displaced water to 1.42 and simultaneously maintain the high viscosity reduction rate at 94.03%, which was beneficial for decreasing the mobility ratio of water to oil [ 16 ]. The viscosity reduction performance and the effect of different chain lengths on the viscosity reduction effect were also investigated.…”

Section: Introductionmentioning

confidence: 99%

Study on the Effect of Different Viscosity Reducers on Viscosity Reduction and Emulsification with Daqing Crude Oil

Zhang

Zhou

et al. 2023

Molecules

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The urgent problem to be solved in heavy oil exploitation is to reduce viscosity and improve fluidity. Emulsification and viscosity reduction technology has been paid more and more attention and its developments applied. This paper studied the viscosity reduction performance of three types of viscosity reducers and obtained good results. The viscosity reduction rate, interfacial tension, and emulsification performance of three types of viscosity reducers including anionic sulfonate, non-ionic (polyether and amine oxide), and amphoteric betaine were compared with Daqing crude oil. The results showed that the viscosity reduction rate of petroleum sulfonate and betaine was 75–85%. The viscosity reduction rate increased as viscosity reducer concentration increased. An increase in the oil–water ratio and polymer decreased viscosity reduction. When the concentration of erucamide oxide was 0.2%, the ultra-low interfacial tension was 4.41 × 10−3 mN/m. When the oil–water ratio was 1:1, the maximum water separation rates of five viscosity reducers were different. With an increase in the oil–water ratio, the emulsion changed from o/w emulsion to w/o emulsion, and the stability was better. Erucamide oxide and erucic betaine had good viscosity reduction and emulsification effects on Daqing crude oil. This work can enrich knowledge of the viscosity reduction of heavy oil systems with low relative viscosity and enrich the application of viscosity reducer varieties.

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Experimental and Computational Study of Modified Biopolymer Xanthan Gum with Synthetic Vinyl Monomers for Enhanced Oil Recovery

Abou-alfitooh,

El-Hosiny,

El-hoshoudy

2024

J Polym Environ

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Utilizing xanthan gum, a biodegradable polymer, in enhanced oil recovery (EOR) is imperative wherever there is a need for innovation in oil production that is both cost-effective and environmentally friendly. Xanthan, chosen for its natural sourcing, availability, controllability, eco-friendliness, and biodegradability, proves resilient against harsh reservoir conditions owing to its rigid structure and elongated polysaccharide chains. This study investigates two modified xanthan gum composites, achieved by grafting with synthetic vinyl monomers through emulsified polymerization. Spectroscopic characterization using FTIR and 1H-NMR, along with surface morphology analysis via atomic force microscopy (AFM) and thermal behavior screening through TGA analysis, elucidates the properties of these modified composites. Rheological behavior under reservoir conditions, including stress scanning and viscosity/shear rate dependency, was evaluated. Material modeling with the Materials Studio program simulated the equilibrium adsorption of xanthan and modified biopolymer chains on SiO2-quartz crystal to assess wettability alteration. Simulation results indicate that XG-g-AM, MMA&TEVS exhibit greater stability and surface coverage with more negative electrostatic energies compared to XG and XG-g-AM&MMA. The laboratory runs on a sandstone-packed model to identify the disclosed XG-g-AM&MMA and XG-g-AM, MMA&TEVS biopolymers as promising EOR candidates and wettability modifiers in challenging sandstone reservoirs, as per experimental outcomes.

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Fabrication of surfactant-biopolymer combined system with dual viscosity reduction and mobility controllability for heavy oil reservoirs

Cited by 9 publications

References 49 publications

Mechanism and Performance Analysis of Nanoparticle-Polymer Fluid for Enhanced Oil Recovery: A Review

Mechanism and Performance Analysis of Nanoparticle-Polymer Fluid for Enhanced Oil Recovery: A Review

Study on the Effect of Different Viscosity Reducers on Viscosity Reduction and Emulsification with Daqing Crude Oil

Experimental and Computational Study of Modified Biopolymer Xanthan Gum with Synthetic Vinyl Monomers for Enhanced Oil Recovery

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