Polymer flooding in high-temperature and high-salinity heterogeneous reservoir by using diutan gum

Lai, Nanjun; Wen, Yiping; Yang, Zhidong; Chen, Jianlin; Zhao, Xin; Wang, Dongdong; He, Wei; Chen, Yuemei

doi:10.1016/j.petrol.2020.106902

Cited by 29 publications

(14 citation statements)

References 41 publications

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“…Consistency coefficient K is a measure of viscosity and thus can reflect the sweep efficiency of polymer solution in porous media. The power law formula [ 43 ] is as follows:

where η is the viscosity of polymer, Pa·s, K is the consistency coefficient, Pa·s n−1 , γ is the shear rate, s −1 , n is the power law index, dimensionless.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Solution Properties of a Novel Hyperbranched Polymer Based on Chitosan for Enhanced Oil Recovery

Chen

Tang

et al. 2020

Polymers

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A new type of chitosan-modified hyperbranched polymer (named HPDACS) was synthesized through the free-radical polymerization of surface-modified chitosan with acrylic acid (AA) and acrylamide (AM) to achieve an enhanced oil recovery. The optimal polymerization conditions of HPDACS were explored and its structure was characterized by Fourier-transform infrared spectroscopy, hydrogen nuclear magnetic resonance, and environmental scanning electron microscopy. The solution properties of HPDACS in ultrapure water and simulated brine were deeply studied and then compared with those of partially hydrolyzed polyacrylamide (HPAM) and a dendritic polymer named HPDA. The experimental results showed that HPDACS has a good thickening ability, temperature resistance, and salt resistance. Its viscosity retention rate exceeded 79.49% after 90 days of aging, thus meeting the performance requirements of polymer flooding. After mechanical shearing, the viscosity retention rates of HPDACS in ultrapure water and simulated brine were higher than those of HPAM and HPDA, indicating its excellent shear resistance and good viscoelasticity. Following a 95% water cut after preliminary water flooding, 0.3 pore volume (PV) and 1500 mg/L HPDACS solution flooding and extended water flooding could further increase the oil recovery by 19.20%, which was higher than that by HPAM at 10.65% and HPDA at 13.72%. This finding indicates that HPDACS has great potential for oil displacement.

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“…Consistency coefficient K is a measure of viscosity and thus can reflect the sweep efficiency of polymer solution in porous media. The power law formula [ 43 ] is as follows:

where η is the viscosity of polymer, Pa·s, K is the consistency coefficient, Pa·s n−1 , γ is the shear rate, s −1 , n is the power law index, dimensionless.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Solution Properties of a Novel Hyperbranched Polymer Based on Chitosan for Enhanced Oil Recovery

Chen

Tang

et al. 2020

Polymers

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“…The measurement steps are the following. 25,26 (a) Water flooding: Inject the simulated brine into the core, record the pressure difference and flow rate at both ends of the core, calculate the permeability of the core according to the Darcy formula, and determine the porosity of the core using the weighing method.…”

Section: Eps Extraction and Pn/ps Content Determinationmentioning

confidence: 99%

Extracellular Polymeric Substances Production by ZL-02 For Microbial Enhanced Oil Recovery

Lin

Zheng

Liu

et al. 2021

Ind. Eng. Chem. Res.

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The use of polymers for plugging high-permeability zones is among the most important technologies for improving oil recovery; however, there are few studies concerning microbial enhanced oil recovery (MEOR) technologies that produce extracellular polymeric substances (EPS) for enhanced oil recovery. In this study, the facultative anaerobic strain Enterobacter cloacae ZL-02 that produces EPS was screened. The results show that the EPS produced by this strain mainly comprise protein and polysaccharide, with a maximum yield of 9.76 g/L. A core flooding test was conducted in order to further explore strains for MEOR potential. The strain showed good ability for mobility control in terms of its resistance coefficient and residual resistance coefficient. Additionally, the plugging rate reached 60.1%, which could increase the oil recovery factor by 26.1%. This study therefore provides theoretical support for using MEOR technology to improve recovery in heterogeneous reservoirs.

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“…When the polymer flooding is unavoidable at high temperatures and salinity, diutan and Scleroglucan are better candidates based on their supreme stability. For example, at 130 °C and 223 g/L salinity, injection of diutan gum solution realized a 19.34% oil recovery, compared with 14.15% of Xanthan gum flooding [ 154 ]. Quadri et al also reported Scleroglucan can keep its entire viscosity at 135 °C and 220 g/L salinity over eight months [ 155 ].…”

Section: Application Of Polysaccharide Biopolymer In Petroleum Recmentioning

confidence: 99%

Application of Polysaccharide Biopolymer in Petroleum Recovery

Xia

Zhang²,

Davletshin

et al. 2020

Polymers

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Polysaccharide biopolymers are biomacromolecules derived from renewable resources with versatile functions including thickening, crosslinking, adsorption, etc. Possessing high efficiency and low cost, they have brought wide applications in all phases of petroleum recovery, from well drilling to wastewater treatment. The biopolymers are generally utilized as additives of fluids or plugging agents, to correct the fluid properties that affect the performance and cost of petroleum recovery. This review focuses on both the characteristics of biopolymers and their utilization in the petroleum recovery process. Research on the synthesis and characterization of polymers, as well as controlling their structures through modification, aims to develop novel recipes of biopolymer treatment with new application realms. The influences of biopolymer in many petroleum recovery cases were also evaluated to permit establishing the correlations between their physicochemical properties and performances. As their performance is heavily affected by the local environment, screening and testing polymers under controlled conditions is the necessary step to guarantee the efficiency and safety of biopolymer treatments.

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Polymer flooding in high-temperature and high-salinity heterogeneous reservoir by using diutan gum

Cited by 29 publications

References 41 publications

Synthesis and Solution Properties of a Novel Hyperbranched Polymer Based on Chitosan for Enhanced Oil Recovery

Synthesis and Solution Properties of a Novel Hyperbranched Polymer Based on Chitosan for Enhanced Oil Recovery

Extracellular Polymeric Substances Production by ZL-02 For Microbial Enhanced Oil Recovery

Application of Polysaccharide Biopolymer in Petroleum Recovery

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