Qualification and Field Injection of Scleroglucan

Kozlowicz, Briana; Muhammed, Farag A.; Kadhum, Mohannad J.; Khambete, Malhar; Jensen, Tryg; Sumner, E. S.; Ravikiran, Ravi; Ray, Chaiti

doi:10.3997/2214-4609.201900161

Cited by 4 publications

(13 citation statements)

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“…In this scenario, the viscosity losses of the SG are less than 30 % at shear rates of up to 275,000 s -1 . These results confirm the low mechanical degradation results reported in the literature with much lower shear rates (up to 1,000 s -1 ) [20]. However, viscosity losses of the sulfonated polyacrylamide reach up to 80 % of its initial viscosity under the same conditions, which lead to a technical-operational disadvantage.…”

Section: Mechanical Stabilitysupporting

confidence: 90%

“…The application of Scleroglucan as an active agent in EOR processes emerges as an environmentally friendly alternative for harsh conditions in reservoirs with high salinity, temperature, and shear stresses, due to its rigid, triple helix structure [12], [18]. Several authors have reported the excellent performance of Scleroglucan in adverse reservoir conditions [19], [20], stability, and high retention for three months at 80°C in high salinity [21]- [23]. Scleroglucan shows great potential with better performance as compared to xanthan gum and polyacrylamides in terms of thermal, chemical and mechanical stability, and oil recovery [12].…”

Section: Experimental Developmentmentioning

confidence: 99%

“…Scleroglucan shows great potential with better performance as compared to xanthan gum and polyacrylamides in terms of thermal, chemical and mechanical stability, and oil recovery [12]. [19], [20]. The concentration determined for these conditions was 300 ppm of the biopolymer to achieve the target viscosity of 1.4 cP.…”

Section: Experimental Developmentmentioning

confidence: 99%

“…Synthetic polymer solutions at a fixed concentration of 2,500 mg/L were prepared according to API-RP-63 [24]. SG solutions were prepared following the practices recommended by the supplier [20], considering agitation, total solubility time, and hydration to ensure homogeneity, stability, and avoid possible negative effects [25]. First, stirthe synthetic brine with a propeller-type agitator at speed enough to generate a vortex of 1/3 of total volume, then sprinkle the biopolymer in the vortex shoulder continuously.…”

Section: Preparation Of Polymer Solutionsmentioning

confidence: 99%

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Heavy Oil and High-Temperature Polymer EOR Applications

García

Gallo

Ardila

et al. 2020

CT&F Cienc. Tecnol. Futuro

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Polymer flooding represents the most common chemical enhanced oil recovery (CEOR) method used at commercial scale. In this process, the polymeric solutions (generally hydrolyzed polyacrylamide - HPAM) are injected to improve the oil/water mobility ratio (M). However, due to mechanical, chemical, bio, and thermal degradation, polymer viscosity losses can occur, causing a negative impact on oil sweep efficiency. In this case, biopolymers seem to be promising candidates in EOR applications with special structural characteristics, which result in excellent stability in harsh environments with high temperatures, ionic forces, and shear stresses. This paper presents the laboratory evaluation of Scleroglucan (SG) and a commercial sulfonated polyacrylamide (ATBS) in synthetic brine, representative of a Colombian heavy-oil field. The effects of ionic strength, pH, temperature, and shear degradation effects on polymer viscosity were also evaluated. For SG, the results reflect its tolerance to high salinities (0-5%wt), ionic strengths (Na+, K+, Ca2+, and Mg2+), shear rates (0-300,000 s-1), temperatures (30, 50, 80 and 100 °C), and pH variations (3-10). The biopolymer was capable of preserving its viscous properties and stability after of the effect of these variables. Finally, the target viscosity (set as 17 cp) was achieved with a lower concentration (2.7 times) than the ATBS polymer tested.

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Section: Mechanical Stabilitysupporting

confidence: 90%

Section: Experimental Developmentmentioning

confidence: 99%

Section: Experimental Developmentmentioning

confidence: 99%

Section: Preparation Of Polymer Solutionsmentioning

confidence: 99%

See 2 more Smart Citations

Heavy Oil and High-Temperature Polymer EOR Applications

García

Gallo

Ardila

et al. 2020

CT&F Cienc. Tecnol. Futuro

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“…According to Figure 5, the viscosity of all solutions is stable within the broad range of pH evaluated (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12). This means that the pH stability of the SG was not affected by carboxymethylation (CMS products) and amidation reactions (NH products).…”

Section: Chemical Stability: Effect Of Ph and Electrolytesmentioning

confidence: 87%

Evaluation of the Thermal, Chemical, Mechanical, and Microbial Stability of New Nanohybrids Based on Carboxymethyl-Scleroglucan and Silica Nanoparticles for EOR Applications

Castro,

Corredor,

Llanos

et al. 2024

Nanomaterials

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Scleroglucan (SG) is resistant to harsh reservoir conditions such as high temperature, high shear stresses, and the presence of chemical substances. However, it is susceptible to biological degradation because bacteria use SG as a source of energy and carbon. All degradation effects lead to viscosity loss of the SG solutions, affecting their performance as an enhanced oil recovery (EOR) polymer. Recent studies have shown that nanoparticles (NPs) can mitigate these degradative effects. For this reason, the EOR performance of two new nanohybrids (NH-A and NH-B) based on carboxymethyl-scleroglucan and amino-functionalized silica nanoparticles was studied. The susceptibility of these products to chemical, mechanical, and thermal degradation was evaluated following standard procedures (API RP 63), and the microbial degradation was assessed under reservoir-relevant conditions (1311 ppm and 100 °C) using a bottle test system. The results showed that the chemical reactions for the nanohybrids obtained modified the SG triple helix configuration, impacting its viscosifying power. However, the nanohybrid solutions retained their viscosity during thermal, mechanical, and chemical degradation experiments due to the formation of a tridimensional network between the nanoparticles (NPs) and the SG. Also, NH-A and NH-B solutions exhibited bacterial control because of steric hindrances caused by nanoparticle modifications to SG. This prevents extracellular glucanases from recognizing the site of catalysis, limiting free glucose availability and generating cell death due to substrate depletion. This study provides insights into the performance of these nanohybrids and promotes their application in reservoirs with harsh conditions.

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Polymers for EOR Application in High Temperature and High Viscosity Oils: Rock–Fluid Behavior

et al. 2020

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Viscosity losses and high degradation factors have a drastic impact over hydrolyzed polyacrylamides (HPAM) currently injected, impacting the oil recovery negatively. Previous studies have demonstrated that biopolymers are promising candidates in EOR applications due to high thermochemical stability in harsh environments. However, the dynamic behavior of a biopolymer as scleroglucan through sandstone under specific conditions for a heavy oil field with low salinity and high temperature has not yet been reported. This work presents the rock–fluid evaluation of the scleroglucan (SG at 935 mgL−1) and sulfonated polyacrylamide (ATBS at 2500 mgL−1) to enhance oil recovery in high-temperature for heavy oils (212 °F and total dissolved solid of 3800 mgL−1) in synthetic (0.5 Darcy) and representative rock samples (from 2 to 5 Darcy) for a study case of a Colombian heavy oilfield. Dynamic evaluation at reservoir conditions presents a scenario with stable injectivity after 53.6 PV with a minimal pressure differential (less than 20 psi), inaccessible porous volume (IPV) of 18%, dynamic adsorption of 49 µg/g, and resistance and residual resistance factors of 6.17 and 2.84, respectively. In addition, higher oil displacement efficiency (up to 10%) was obtained with lower concentration (2.7 times) compared to a sulfonated polyacrylamide polymer.

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Qualification and Field Injection of Scleroglucan

Cited by 4 publications

References 0 publications

Heavy Oil and High-Temperature Polymer EOR Applications

Heavy Oil and High-Temperature Polymer EOR Applications

Evaluation of the Thermal, Chemical, Mechanical, and Microbial Stability of New Nanohybrids Based on Carboxymethyl-Scleroglucan and Silica Nanoparticles for EOR Applications

Polymers for EOR Application in High Temperature and High Viscosity Oils: Rock–Fluid Behavior

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