Performance Evaluation and Oil Displacement Effect of Amphiphilic Polymer Heavy Oil Activator

Zhi, Jiqiang; Liu, Yikun; Chen, Jinfeng; Jiang, Nan; Xü, Dong; Bo, Lifeng; Qu, Guohui

doi:10.3390/molecules28135257

Cited by 3 publications

(2 citation statements)

References 16 publications

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“…After mechanical shearing, the viscosity retention rate of HPDACs in ultrapure water and simulated brine was higher than that of PAM and the dendritic polymer, indicating the excellent shear resistance and good viscoelasticity of HPDACs. In addition, in order to effectively avoid chromatographic separation problems of BPSMs, both hydrophobic and hydrophilic groups were introduced into BPSMs [31] to improve the ability to expand the swept volume and oil displacing efficiency [32,33]. Zhu et al [34] synthesized an amphiphilic polymer with twintailed hydrophobic groups (TAP).…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization, and Properties of a Novel Hyperbranched Polymers with Polyacrylamide Side Chains

Qin,

Wang,

Tang

et al. 2024

Materials

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A novel hyperbranched polymer with polyacrylamide side chains (HAPAM) was synthesized by aqueous solution polymerization using acrylic acid, acrylamide, 2-acrylamido-2-methyl-1-propanesulfonic acid, hydrophobic monomer of dimethyl octadecyl ammonium chloride, and the homemade skeleton monomer of modified-M2.0 as raw materials and (NH4)2S2O8-NaHSO3 as initiator. The molecular structure, functional groups, and surface morphology of HAPAM were characterized by Fourier transform infrared spectroscopy, nuclear magnetic resonance hydrogen spectroscopy, and scanning electron microscopy. It was found that the performance of HAPAM solution was higher than that of ordinary polyacrylamide solution in terms of thickening ability, shearing resistance, thermal endurance, salt-resistance, resistance-coefficient and residual-resistance-coefficient, ability to reduce interfacial tension between polymer solution and crude oil, and oil-displacement-efficiency. In particular, the enhanced oil recovery of the HAPAM solution was 13.03%, and the improvement of shearing resistance and immunity to chromatographic separation were simultaneously achieved by the HAPAM solution. These results indicate that the successful synthesis of the novel HAPAM opens a promising strategy for developing new high-performance oil-displacing polymers.

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Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization, and Properties of a Novel Hyperbranched Polymers with Polyacrylamide Side Chains

Qin,

Wang,

Tang

et al. 2024

Materials

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“…Moreover, amphiphilic polymers with double-tail hydrophobic groups displayed improved temperature resistance, salt resistance, and mechanical shear resistance at equivalent polymer solution concentrations. Zhi [23] employed amphiphilic polymer as a heavy oil activator and investigated the changes in residual oil distribution following activator displacement, along with its performance in heavy oil activation. The results demonstrated that the activator could reduce oil-water interfacial tension, break down and disperse recombination fractions in heavy oil, and decrease heavy oil viscosity.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Performance Evaluation of Amphiphilic Polymers for Enhanced Heavy Oil Recovery

Fei,

Guo,

Xiong

et al. 2023

Polymers

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The continuous growth in global energy and chemical raw material demand has drawn significant attention to the development of heavy oil resources. A primary challenge in heavy oil extraction lies in reducing crude oil viscosity. Alkali–surfactant–polymer (ASP) flooding technology has emerged as an effective method for enhancing heavy oil recovery. However, the chromatographic separation of chemical agents presents a formidable obstacle in heavy oil extraction. To address this challenge, we utilized a free radical polymerization method, employing acrylamide, 2-acrylamido-2-methylpropane sulfonic acid, lauryl acrylate, and benzyl acrylate as raw materials. This approach led to the synthesis of a multifunctional amphiphilic polymer known as PAALB, which we applied to the extraction of heavy oil. The structure of PAALB was meticulously characterized using techniques such as infrared spectroscopy and Nuclear Magnetic Resonance Spectroscopy. To assess the effectiveness of PAALB in reducing heavy oil viscosity and enhancing oil recovery, we conducted a series of tests, including contact angle measurements, interfacial tension assessments, self-emulsification experiments, critical association concentration tests, and sand-packed tube flooding experiments. The research findings indicate that PAALB can reduce oil–water displacement, reduce heavy oil viscosity, and improve swept volume upon injection into the formation. A solution of 5000 mg/L PAALB reduced the contact angle of water droplets on the core surface from 106.55° to 34.95°, shifting the core surface from oil-wet to water-wet, thereby enabling oil–water displacement. Moreover, A solution of 10,000 mg/L PAALB reduced the oil–water interfacial tension to 3.32 × 10−4 mN/m, reaching an ultra-low interfacial tension level, thereby inducing spontaneous emulsification of heavy oil within the formation. Under the condition of an oil–water ratio of 7:3, a solution of 10,000 mg/L PAALB can reduce the viscosity of heavy oil from 14,315 mPa·s to 201 mPa·s via the glass bottle inversion method, with a viscosity reduction rate of 98.60%. In sand-packed tube flooding experiments, under the injection volume of 1.5 PV, PAALB increased the recovery rate by 25.63% compared to traditional hydrolyzed polyacrylamide (HPAM) polymer. The insights derived from this research on amphiphilic polymers hold significant reference value for the development and optimization of chemical flooding strategies aimed at enhancing heavy oil recovery.

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Quantitative Characterization Method for Remaining Oil Distribution in Heavy Oil After Multi-Cycle Steam Huff and Puff Based on CT Scanning

Zheng,

Hou,

2024

Day 3 Wed, April 24, 2024

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Steam huff and puff is an important development method for heavy oil reservoirs. An accurate description of the remaining oil distribution after steam huff and puff is crucial for reservoir development. In this study, an experimental setup is used to simulate the multi-cycle steam huff and puff process more realistically. The occurrence state and distribution of remaining oil after different cycles of steam huff and puff are investigated. CT scanning is conducted after the first, fourth, and seventh cycles. Based on characterization parameters such as shape factor, contact ratio, and Euler number, the microscopic remaining oil is classified into network remaining oil, cluster remaining oil, film remaining oil, and isolated droplet remaining oil. The volume proportions of different types of remaining oil of different cycles of steam huff and puff are compared. The viscosity of the heavy oil used in the experiment is 560 mPa·s (25°C). The results indicate that as the number of cycles increases, the volume proportion of network remaining oil decreases, while the volume proportions of cluster, film, and isolated droplet remaining oil increase. From the first to the seventh cycle, the volume proportion of network remaining oil decreases by 34.11%, while the volume proportions of cluster, film, and isolated droplet remaining oil increase by 12.87%, 14.48%, and 6.76% respectively. The oil phase transitions from a continuous distribution to a discontinuous distribution. With an increase in the number of cycles, the water saturation increases, and the distribution of remaining oil becomes more dispersed. The results of this research guide the subsequent production of heavy oil.

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Performance Evaluation and Oil Displacement Effect of Amphiphilic Polymer Heavy Oil Activator

Cited by 3 publications

References 16 publications

Synthesis, Characterization, and Properties of a Novel Hyperbranched Polymers with Polyacrylamide Side Chains

Synthesis, Characterization, and Properties of a Novel Hyperbranched Polymers with Polyacrylamide Side Chains

Preparation and Performance Evaluation of Amphiphilic Polymers for Enhanced Heavy Oil Recovery

Quantitative Characterization Method for Remaining Oil Distribution in Heavy Oil After Multi-Cycle Steam Huff and Puff Based on CT Scanning

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