Experimental Study on Influencing Factors of Resistance Coefficient and Residual Resistance Coefficient in Oilfield Z

Wang, Xinran; Ge, Lizhen; Liu, Dong; Zhu, Qin; Zheng, Bin

doi:10.4236/wjet.2019.72018

Cited by 4 publications

(3 citation statements)

References 10 publications

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“…The ability to reduce interfacial tension for AA/AM/AOS/C 16 ‐DMAAC was stronger than that of HPAM, which can be explained by the fact that a certain degree of surface activity was supplied by the introduction of surface‐active monomer of AOS in AA/AM/AOS/C 16 ‐DMAAC. From Table 3, it can be obtained that AA/AM/AOS/C 16 ‐DMAAC had a bigger increment in resistance coefficient (45.24) and residual resistance coefficient (7.91), compared to those (23.07 and 4.61) of HPAM, indicating that AA/AM/AOS/C 16 ‐DMAAC can be adsorbed on the rock surface, thus controlling the flow of the aqueous phase in the porous medium, decreasing the permeability of the porous medium, 48 and increasing the wave volume of subsequent water flooding.…”

Section: Resultsmentioning

confidence: 97%

Synthesis and performance evaluation of a novel zwitterionic quaternary copolymer for enhanced oil‐recovery application

Qin,

Xie,

Tang

et al. 2024

SPE Polymers

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A novel quaternary copolymer of AA/AM/AOS/C16‐DMAAC was synthesized with acrylic acid (AA), acrylamide (AM), sodium α‐alkenyl‐sulfonate (AOS), and dimethyl‐hexadecyl‐allyl‐ammonium chloride (C16‐DMAAC), using ammonium persulfate and sodium bisulfate (NH4)2S2O8‐NaHSO3) as initiators. The structure of AA/AM/AOS/C16‐DMAAC was characterized using Fourier transform infrared spectroscopy and nuclear magnetic resonance hydrogen spectroscopy. It can be found that the thickening capacity, shearing resistance, temperature‐resistance, salt‐resistance, and emulsification properties of AA/AM/AOS/C16‐DMAAC were superior to those of most widely and cost‐effective partially hydrolyzed polyacrylamide (HPAM) solution at the same concentration. Specifically, the viscosity retention rate of AA/AM/AOS/C16‐DMAAC (3000 mg/L) solution was 86%, which was better than that of HPAM solution (52%) after 30 s of mechanical shearing at 28000 r/min. In addition, the enhanced oil recovery of AA/AM/AOS/C16‐DMAAC solution was 16% at 65 °C, which was about 1.5 times higher than that of HPAM solution (11%). Significantly, successful synthesis of zwitterionic quaternary copolymer emphasizes the importance of a systematic approach to designing appropriate copolymers for enhanced oil recovery.Highlights A novel zwitterionic quaternary copolymer of AA/AM/AOS/C16‐DMAAC was successfully synthesized. The performance on thickening capacity, shearing resistance, temperature‐resistance, salt‐resistance, and emulsification properties of AA/AM/AOS/C16‐DMAAC was superior to that of the most widely used partially hydrolyzed polyacrylamide (HPAM). The enhanced oil recovery of AA/AM/AOS/C16‐DMAAC (16%) was about 1.5 times higher than that of HPAM (11%).

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Section: Resultsmentioning

confidence: 97%

Synthesis and performance evaluation of a novel zwitterionic quaternary copolymer for enhanced oil‐recovery application

Qin,

Xie,

Tang

et al. 2024

SPE Polymers

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“…Chemical flooding is a mature technology, which has been popularized and applied in medium- and high-permeability reservoirs. , Field trials began in the United States in the early 1960s, followed by the United Kingdom, France, Norway, and Indonesia. Most of oilfields in China are continental sedimentary basins with strong reservoir heterogeneity.…”

Section: Introductionmentioning

confidence: 99%

Polymer–Surfactant Flooding in Low-Permeability Reservoirs: An Experimental Study

Liao¹,

Yu²,

Xu³

et al. 2022

ACS Omega

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Chemical flooding technology has been widely applied in medium- and high-permeability reservoirs. However, it is rarely applied in low-permeability reservoirs, which is mainly limited by reservoir physical properties, chemical agents, injection capacity, and so forth. In this paper, a novel chemical formula used in low-permeability reservoirs was developed. In response to the low-permeability reservoir geological characteristics, fluid properties, and water flooding development of the target block, some experimental studies and field project studies of polymer–surfactant flooding were carried out. The surfactant structure and polymer molecular weight were determined from laboratory experiments. The polymer–surfactant binary system was synthesized. It had good injectivity in low-permeability reservoirs, and its oil recovery efficiency increased over 10% in the laboratory experiment. The result was higher than that of single chemical flooding. After field implementation, initial results have been achieved with an increase in injection pressure. The chemical formula can effectively alleviate intra-layer and inter-layer contradictions in the reservoir. The project has increased oil output by 77,700 t and the recovery factor by 3.5%. The experience and lessons were of great significance for the development of chemical flooding in high-temperature, high-salinity, and low-permeability reservoirs.

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“…But it has little effect on improving oil recovery rate, as a tertiary oil recovery technology, polymer flooding has been widely used in oilfield development, because it can effectively improve the water to oil mobility ratio, and then it can expand the swept volume of displacement media [1] [2] [3] [4] [5], however, its scope of application mainly concentrates on the onshore oilfields, while offshore oilfields are relatively small. In China, only a few field tests have been carried out in the Bohai Bay area.…”

Section: Introductionmentioning

confidence: 99%

Research on Optimization of Reservoir Perforation Position in Offshore Polymer Flooding Oilfield

Ge¹,

Wang²,

Zhu³

et al. 2019

JPEE

Self Cite

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In order to enhance the effect of polymer flooding in offshore oilfields, so as to realize the longer stable production period and higher oil recovery, the reservoir perforation positions of production wells and injection wells are taken as research objects. By analyzing the distribution of remaining oil and production characteristics under different perforation positions, the optimum perforation positions of production wells and injection wells are selected. Bohai oilfield L was taken as target oilfield in this article, according to the actual reservoir characteristic parameters, three-dimensional laboratory physical simulation experiments of water flooding and polymer flooding were carried out, the experiments include different perforation positions of production wells and injection wells. The research result showed that the influence of perforation position on residual oil and development characteristics of the model is obvious. When takes the scheme of injection well upper part perforated and production well all part perforated, the least of the remaining oil distribution, the longest of the production period without water. Contrast with other perforation schemes, its stable production period increase about 1.2 times, the oil recovery of water flooding increase 3.7%-6.0%, the oil recovery of polymer flooding increase 2.5%-4.1%. So it is recommended as the best perforation scheme. Preferable effect had been achieved when translating research findings into practice. It can serve as a reference to the similar offshore oilfield.

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Experimental Study on Influencing Factors of Resistance Coefficient and Residual Resistance Coefficient in Oilfield Z

Cited by 4 publications

References 10 publications

Synthesis and performance evaluation of a novel zwitterionic quaternary copolymer for enhanced oil‐recovery application

Synthesis and performance evaluation of a novel zwitterionic quaternary copolymer for enhanced oil‐recovery application

Polymer–Surfactant Flooding in Low-Permeability Reservoirs: An Experimental Study

Research on Optimization of Reservoir Perforation Position in Offshore Polymer Flooding Oilfield

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