• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >The optimal use of enhanced oil recovery polymers under hostile conditions.
【24h】

The optimal use of enhanced oil recovery polymers under hostile conditions.

机译：在不利条件下增强采油聚合物的最佳使用。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The purpose of this work is to frame the main issues one must face in the design of a mobility control process using polyacrylamide and related acrylic polymers under hostile conditions. Proper preliminary lab evaluation techniques, chemical degradation and related calcium tolerance issues, thermal degradation, and economic optimization based upon injectivity are discussed. Emphasis is placed on stability under alkaline conditions, the use of sodium dithionite to prevent thermal degradation, and the beneficial use of in-situ hydrolysis to increase injectivity.;Filtration properties are a focus of screening experiments, and though it often takes several days to achieve acceptable filter ratios in the lab, experience from two field observations indicate that even high molecular weight polymers have filtration ratios on the order of 1.2 or less before they are injected, so preparation procedures that do not result in this may not yield results that scale to the field.;Chemical stability issues with acrylamide polymers are addressed in two parts, the first describing the kinetics of hydrolysis under neutral and alkaline conditions and the second estimating the calcium tolerance of aged polymers using industrial and lab produced analogues. Under alkaline conditions, hydrolysis is very rapid, even at low temperatures. Though aged copolymers of acrylamide (AM) and 2-acrylamide 2-methyl propane sulfonate (AMPS) exhibit similar calcium tolerances to similarly aged polyacrylamide (PAM), viscosity loss is much higher for the latter as this limit is approached.;Thermal, or "oxidative" degradation, is examined using Pourbaix diagrams for iron to understand the commonly reported relationships between pH, Eh, and stability. The beneficial effects of sodium carbonate and sodium dithionite on polymer solutions as well as some inconsistencies in the literature point towards a catalytic role played by ppb level amounts of iron in oxidative degradation mechanisms. It is put forward that addition of sodium dithionite is a conservative approach to all acrylic-backboned polymer floods, and practical issues related to this are discussed.;A simple analytical model is developed to take a brief look at economic optimization of polymer viscosity, and this is used to demonstrate the benefits of in-situ hydrolysis in alkaline or high-temperature floods.
机译：这项工作的目的是阐明在敌对条件下使用聚丙烯酰胺和相关丙烯酸聚合物进行流动性控制工艺设计时必须面对的主要问题。讨论了适当的初步实验室评​​估技术，化学降解和相关的钙耐受性问题，热降解以及基于注射性的经济优化。重点在于在碱性条件下的稳定性，使用连二亚硫酸钠防止热降解以及有益地使用原位水解以提高进样率。过滤性能是筛选实验的重点，尽管通常需要几天才能完成在实验室中达到可接受的过滤比，来自两次现场观察的经验表明，即使高分子量聚合物在注射前也具有1.2或更低的过滤比，因此未导致此结果的制备步骤可能无法获得如此规模的结果丙烯酰胺聚合物的化学稳定性问题分为两部分，第一部分描述了在中性和碱性条件下的水解动力学，第二部分使用工业和实验室生产的类似物估算了老化聚合物的钙耐受性。在碱性条件下，即使在低温下，水解也非常迅速。尽管丙烯酰胺（AM）和2-丙烯酰胺2-甲基丙烷磺酸酯（AMPS）的老化共聚物显示出与相似老化的聚丙烯酰胺（PAM）相似的钙耐受性，但随着接近该极限，后者的粘度损失要高得多。使用铁的Pourbaix图检查“氧化”降解，以了解通常报道的pH，Eh和稳定性之间的关系。碳酸钠和连二亚硫酸钠对聚合物溶液的有益作用以及文献中的一些矛盾之处表明，ppb水平的铁在氧化降解机理中起着催化作用。有人提出，连二亚硫酸钠的添加是所有丙烯酸基胶粘聚合物注水的一种保守方法，并讨论了与此相关的实际问题。；建立了一个简单的分析模型，简要介绍了聚合物粘度的经济优化，以及这用于证明碱性或高温洪水中原位水解的好处。

著录项

  • 作者

    Levitt, David Benjamin.;

  • 作者单位

    The University of Texas at Austin.;

  • 授予单位 The University of Texas at Austin.;
  • 学科 Engineering Petroleum.
  • 学位 Psy.D.
  • 年度 2009
  • 页码 195 p.
  • 总页数 195
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 石油、天然气工业;
  • 关键词

  • 入库时间 2022-08-17 11:38:28

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号