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首页> 外文期刊>Energy & fuels >Experimental Investigation of the Novel Phenol-Formaldehyde Cross-Linking HPAM Gel System: Based on the Secondary Cross-Linking Method of Organic Cross-Linkers and Its Gelation Performance Study after Flowing through Porous Media
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Experimental Investigation of the Novel Phenol-Formaldehyde Cross-Linking HPAM Gel System: Based on the Secondary Cross-Linking Method of Organic Cross-Linkers and Its Gelation Performance Study after Flowing through Porous Media

机译：新型苯酚-甲醛交联HPAM凝胶体系的实验研究：基于有机交联剂的二次交联方法及其在多孔介质中流动后的胶凝性能研究

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摘要

The use of a polymer gel is an effective method for water shutoff in mature oilfield development. As for fractured reservoirs, in order to mitigate the filtration of gelant (fluid solution of cross-linker and polymer that exists before gelation) to matrix and increase the enduring erosion ability of mature gel. chromium(lll) acetate, and phenol-formaldehyde cross-linking, (he HPAM gel system of a secondary cross-linking method is used more often. Chromium(lll) salt is often used as the first cross-linker. However, the cross-linking mechanism is achieved by an ion bond, which is less stable than a covalent bond when used as an organic cross-linker. Resorcinol and phenol-formaldehyde used as the first and secondary cross-linker, respectively, are discussed in this paper. Results showed that resorcinol can quickly cross-link with HPAM at room temperature. Gelant formulated with a combination of 0.3 wt % HPAM added to 10-30 mg/L resorcinol can increase its viscosity from 10.2 to 150 mPa-s within 2 h. SEM results show that the microstructure of the first cross-linking gel appears in typical dendritic shape, with branched chains diffused in arbitrary directions. The high shearing tolerant ability of the first cross-linking gel can be achieved by these branched chains. However, a tight 3-D network structure is formed in the microstructure of the secondary cross-linking gel. This is the benefit of the stability of the skeleton structure of gel enhancing. The main factors, including temperature and total dissolved solids (TDS), to affect the gelation performance of this secondary cross-linking gel are also discussed. Results show that gelation time decreased and gel strength increased with increasing temperature and TDS. Especially for TDS, the adverse law of the gelation performance with PEl/PAtBA or PEJ'HPAM gel systems is shown. The gelation performance of a resorcinol/phenol-formaldehyde/HPAM gel system of a first cross-linking state after flowing through porous media is studied. Atomic force microscopy (AFM) scanning results show that in comparison to the original gel. the structure of the weak cross-linking (code B) gels has a certain degree of damage after flowing through porous media. However, the final gel strength of both gels do not show an apparent difference. This demonstrated that the first cross-linking achieved by resorcinol can guarantee the effectiveness of secondary cross-linking. This study suggests that a resorcinol/phenol -formaldehyde HPAM secondary cross-linking gel system can be used for water shutoff in fractured reservoirs.
机译：在成熟油田开发中，使用聚合物凝胶是一种有效的堵水方法。对于裂缝性储层，为了减轻胶凝剂（胶凝之前​​存在的交联剂和聚合物的流体溶液）向基质的过滤并增加成熟胶的持久侵蚀能力。乙酸铬（III）和苯酚-甲醛交联（使用二次交联方法的HPAM凝胶系统的情况较多。铬（III）盐通常用作第一个交联剂。离子键实现了键合机理，离子键在用作有机交联剂时不如共价键稳定，本文分别讨论间苯二酚和苯酚-甲醛分别作为第一和第二交联剂。结果表明，间苯二酚可以在室温下快速与HPAM交联，将0.3 wt％HPAM加入10-30 mg / L间苯二酚的胶凝剂可在2小时内将其粘度从10.2提高到150 mPa-s。结果表明，第一交联凝胶的微观结构呈典型的树枝状，支链向任意方向扩散，第一支交联凝胶具有较高的剪切耐受能力，但支链紧密。 3D网络在第二交联凝胶的微观结构中形成组织。这是增强凝胶的骨架结构的稳定性的益处。还讨论了影响该次级交联凝胶的胶凝性能的主要因素，包括温度和总溶解固体（TDS）。结果表明，随着温度和TDS的增加，胶凝时间缩短，胶凝强度增加。特别是对于TDS，显示了PEI / PAtBA或PEJ'HPAM凝胶系统的凝胶化性能的不利规律。研究了间苯二酚/苯酚-甲醛/ HPAM凝胶体系在流过多孔介质后处于第一交联状态的胶凝性能。原子力显微镜（AFM）的扫描结果表明，与原始凝胶相比。弱交联（代码B）的凝胶在流过多孔介质后具有一定程度的损坏。但是，两种凝胶的最终凝胶强度均未显示出明显差异。这表明间苯二酚实现的第一次交联可以保证二次交联的有效性。这项研究表明，间苯二酚/苯酚-甲醛HPAM二级交联凝胶体系可用于裂缝性储层的注水。

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  • 来源
    《Energy & fuels》 |2011年第janaafeba期|p.727-736|共10页
  • 作者

    Hu Jia; Wan-Fen Pu; Jin-Zhou Zhao; Ran Liao;

  • 作者单位

    State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500,People 's Republic of China;

    State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500,People 's Republic of China;

    State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500,People 's Republic of China;

    State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500,People 's Republic of China,School of Chemistry and Chemieal Engineering. Southwest Petroleum University, Chengdu 610500, People's Republic of China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    PEI: polyethyleneimine; HPAM: partially hydrolyzed polyacrylamide; PAtBA: copolymer of acrylamide and/-butyl acrylate; PAAm-AMPS: copolymer of acrylamide and 2-acryl-amide-2-methylpropanesulfonate; TDS: total dissolved solids;

    机译：PEI：聚乙烯亚胺;HPAM：部分水解的聚丙烯酰胺;PAtBA：丙烯酰胺和丙烯酸正丁酯的共聚物;PAAm-AMPS：丙烯酰胺和2-丙烯酰胺-2-甲基丙烷磺酸盐的共聚物;TDS：总溶解固体;

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