• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>SPE Asia Pacific improved oil recovery conference (APIORC 01) >A Comparison of Various Laboratory Techniques to Measure Thermodynamic Asphaltene Instability
【24h】

A Comparison of Various Laboratory Techniques to Measure Thermodynamic Asphaltene Instability

机译：测量热力学沥青质不稳定性的各种实验室技术的比较

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

Asphaltenes are the n-pentane or n-heptane insoluble fractionsrnof crude oil that remain in solution under reservoirrntemperature and pressure conditions. They are destabilizedrnand start to precipitate when the pressure, temperature and/orrncomposition changes occur during primary production. Thernprecipitated asphaltene particles will then grow in size andrnmay start to deposit onto the production string and/orrnflowlines, causing operational problems.rnIn this paper, our emphasis is to identify the firstrnpressure and/or temperature conditions at which the asphaltenernwill start to precipitate for two reservoir oils. Four differentrnlaboratory techniques were independently used to define thernonset of the asphaltene precipitation envelope. These methodsrnare 1) gravimetric, 2) acoustic resonance, 3) light scattering,rnand 4) filtration. The gravimetric method was found to bernprecise and within the accuracy of the analytical methods.rnHowever, the method was time consuming. The acousticrnresonance technique (ART) was fast and less subjective, but itrndid not define the lower asphaltene boundary. Therninterpretation of the onset pressure from the near-infraredrn(NIR) light-scattering technique (LST) was subjective to arndegree. However, the NIR response defined the upper andrnlower boundaries of the asphaltene envelope and thernbubblepoint pressure, as did the gravimetric technique. In arnway similar to those of the gravimetric technique and LST, thernfiltration technique can also define the upper and lowerrnasphaltene phase boundaries in addition to the bubblepointrnpressure. The filtration technique is fast compared torngravimetric technique, but takes more time than the ART andrnLST methods.
机译：沥青质是在储层温度和压力条件下保留在溶液中的正戊烷或正庚烷不溶性馏分原油。在一次生产过程中，当压力，温度和/或组成发生变化时，它们不稳定并且开始沉淀。然后沉淀的沥青质颗粒会长大，并且可能开始沉积到生产管柱和/或流动管线上，从而导致操作问题。本文中，我们的重点是确定两个油藏沥青质将开始沉淀的第一压力和/或温度条件。油。分别使用四种不同的实验室技术来定义沥青质降水包膜的热定形。这些方法是：1）重量分析法； 2）声共振分析法； 3）光散射分析法； 4）过滤法。重量法被认为是精确的并且在分析方法的准确性之内。然而，该方法很费时。声共振技术（ART）快速且主观性较低，但并未定义沥青质下界。近红外（NIR）光散射技术（LST）对开始压力的解释受制于学位。但是，NIR响应与重量分析技术一样，定义了沥青质包膜的上边界和下边界以及沸点。在类似于重力法和LST的方法中，除泡点压力外，渗滤技术还可以定义上下萘酚相的边界。过滤技术比重力法要快，但是比ART和LST方法要花费更多的时间。

著录项

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