Novel Application of Polyethylene Oxide Polymer for EOR from Oil-Wet Carbonates

Trine, Eric; Pope, Gary A.; Britton, Chris; Dean, Robert M.; Driver, Jonathan William

doi:10.2118/209446-ms

Cited by 3 publications

(1 citation statement)

References 10 publications

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“…The TriNetX network contains data provided by participating HCOs, each of which represents and warrants that it has all necessary rights, consents, approvals, and authority to provide the data to TriNetX under a business associate agreement (BAA), so long as their name remains anonymous as a data source and their data are utilized for research purposes. The data shared through the TriNetX platform are attenuated to ensure that they do not include sufficient information to facilitate the determination of which HCO contributed which specific information about a patient [25].…”

Section: Supplementary Informationmentioning

confidence: 99%

Increased incidence of adult-onset Still’s disease in association with COVID-19 vaccination and SARS-CoV-2 infection

Gottschalk

Heiland

Nahles

et al. 2023

Orphanet J Rare Dis

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Background Adult-onset Still’s disease (AOSD) is a multi-system, auto-inflammatory disease characterized by fever, arthralgia, typical rash, leukocytosis, sore throat, and liver dysfunction, among other symptoms. Retrospective studies about the frequencies of AOSD have shown that this disease is very rare. However, there has been an increased scientific interest in the last 2 years, as numerous case studies on AOSD have been published. These case studies describe the occurrence of AOSD after SARS-CoV-2 infection and/or COVID-19 vaccination. Methods We analyzed the incidence of AOSD to examine a potential association between AOSD and SARS-CoV-2 infection and/or COVID-19 vaccination. The TriNetX dataset consists of 90 million patients. We found 8474 AOSD cases, which we analyzed regarding SARS-CoV-2 infection and/or vaccination status. We also analyzed the cohorts considering demographic data, lab values, co-diagnoses and treatment pathways. Results We divided the AOSD cases into four cohorts: primary cohort (AOSD), Cov cohort (AOSD + SARS-CoV-2 infection), Vac cohort (AOSD + COVID-19 vaccination) and Vac + Cov cohort (AOSD + COVID-19 vaccination + SARS-CoV-2 infection). For the primary cohort, we found an annual incidence of 0.35 per 100.000. We found an association between AOSD and SARS-CoV-2 infection and/or COVID-19 vaccination. According to the numerical analysis, the incidence of AOSD doubled for the Cov cohort and Vac cohort. Moreover, the incidence of AOSD was 4.82 times higher for Vac + Cov cohort. The lab values for inflammatory markers were increased. Co-diagnoses such as rash, sore throat, and fever appeared in all AOSD cohorts, with the highest occurrences in the AOSD + COVID-19 vaccination + SARS-CoV-2 infection cohort. We identified several lines of treatments, mainly in association with adrenal corticosteroids. Conclusions This research supports the assumption of an association between AOSD and SARS-CoV-2 infection and/or COVID-19 vaccination. However, AOSD remains a rare disease and the usage of vaccines to fight the COVID-19 pandemic should not be questioned because of the increased incidence of AOSD.

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Section: Supplementary Informationmentioning

confidence: 99%

Increased incidence of adult-onset Still’s disease in association with COVID-19 vaccination and SARS-CoV-2 infection

Gottschalk

Heiland

Nahles

et al. 2023

Orphanet J Rare Dis

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Recent Advances in Modeling Polymer Flooding

Li,

Dean,

Lashgari

et al. 2024

SPE Improved Oil Recovery Conference

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New and improved physical property models have been added to the UTCHEM reservoir simulator to accommodate a broader range of polymer flooding applications and to improve its predictive capabilities. Accurate simulations of the chemistry and physics of polymer flooding are needed to design and optimize a polymer flood including the selection of the best polymer to use for specific reservoir conditions. The new polymer viscosity model implemented in UTCHEM can be used to calculate polymer viscosity more accurately as a function of polymer concentration, shear rate, salinity and hardness, temperature, and intrinsic viscosity. The new model is based on extensive polymer viscosity and rheological measurements. The improved polymer rheology is important for more reliable predictions of polymer injectivity and reservoir sweep. A hydrolysis model has been added to UTCHEM to aid in the selection of polymers as a function of temperature, brine composition and pH. A new cation exchange model that includes hydrolyzed polyacrylamide has been implemented to account for the effect of different cations in the brine on the polymer properties as a function of the degree of hydrolysis. The inaccessible pore volume model has been modified to include the exclusion of large polymer molecules from pores below a certain size in addition to the effect of polymer size on the velocity of the polymer molecules within the pores that are large enough for the polymer to enter. The new inaccessible pore volume model serves as a useful tool for selecting reservoir- compatible polymers and improving the accuracy of the simulations. Extensive high-quality lab data were used to validate the new models. Simulation cases were built to illustrate how the models can be used to upscale lab results to field scale.

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EOR Polymer Flooding Enlivening Through Updated Coreflood Experiments and Advanced Numerical Reservoir Simulation: A Comprehensive Case Study

Fiallos-Torres,

Eras,

Orjuela

et al. 2024

SPE Symposium and Exhibition - Production Enhancement and Cost Optimisation

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A 45-year-old oil field has achieved successful transition of its field development plan towards full-field waterflooding after high-volume operations, continuous surveillance, and strategic interventions. Currently, tertiary recovery is on the horizon to take over the waterflooding processes. This paper presents a comprehensive case study on the revitalization of polymer flooding strategies through the integration of advanced numerical reservoir simulation and chemical coreflood experiments to overcome complex reservoir conditions and recover its untapped oil potential. The methodology included the holistic numerical simulation of the physical behavior of a tailored polymer flooding into the reservoir. First, this paper's authors revisited the coreflood results to not only establish expectations on incremental oil recoveries but to elucidate simulation inputs for the polymer rheology model and rock-retention constraints. Detailed analysis was placed on the brine and polymer characterization, its viscosity model, mechanical degradation, and fluid-rock interactions. Next, simulation scenarios focused on overcoming critical parameters such as injectivity and polymer breakthrough time and refining existing operational constraints to optimize oil recovery efficiency. Finally, conformance control methods were evaluated. The proposed approach evaluates the benefits and limitations of sulfonic polyacrylamide HPAM (15-17 MM Daltons) polymer flooding in this high-temperature (210°F) mature reservoir through highly detailed reservoir simulation conducted on Intersect (IX). The final product was a comprehensive evaluation of enhanced oil recovery (EOR) polymer flooding as a mobility control agent to improve sweep and displacement efficiencies of current waterflooding processes of the entire field thanks to advanced numerical simulation workflows. The selected polymer showed thermal stability and aimed to reach 10 cp at 800 ppm Nevertheless, critical parameters such as injectivity losses, permeability reduction factor, and polymer adsorption were thoroughly evaluated in both laboratory and field scales. Laboratory coreflood results were appropriately fitted with numerical methods, which served as reservoir numerical simulator inputs. Residual resistance factors (RRF) and resulting adsorption isotherm showed a low polymer retention by dynamic simulation. Also, monitoring field pressure and polymer concentration provided useful insights about improved sweep and polymer retention associated with the polymer flood. As result, the reservoir of interest and brine conditions (salinity, temperature, permeability, RRF, dead pore space, among others) caused favorable additional production incremental volumes of about 17% with respect to secondary scenarios. The fine-tuned simulation aided to de-risk the EOR technology and evaluate the possible benefits of a full-field expansion of polymer flooding. For instance, modeling the brine ionic concentration of the injected water and its interaction with the polymer was a novel feature of this study. Also, polymer retention and its characterization were tailored in the studied field for the first time by de-risking as many parameters as possible and finding the optimum injection strategies.

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Novel Application of Polyethylene Oxide Polymer for EOR from Oil-Wet Carbonates

Cited by 3 publications

References 10 publications

Increased incidence of adult-onset Still’s disease in association with COVID-19 vaccination and SARS-CoV-2 infection

Increased incidence of adult-onset Still’s disease in association with COVID-19 vaccination and SARS-CoV-2 infection

Recent Advances in Modeling Polymer Flooding

EOR Polymer Flooding Enlivening Through Updated Coreflood Experiments and Advanced Numerical Reservoir Simulation: A Comprehensive Case Study

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