Development and Efficiency Testing of Sucker Rod Pump Downhole Desanders

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2020-05-01 DOI:10.2118/200478-pa
C. Langbauer, M. Hartl, Sergej Gall, L. Volker, Christian Decker, Lukas Koller, S. Hönig
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引用次数: 10

Abstract

Tense economic situations push the demand for low-cost oil production, which is especially challenging for production in mature oil fields. Therefore, an increase in the meantime between failure and the limitation of equipment damage is essential. A significant number of wells in mature fields are suffering under sand by-production. The objective of this paper is to show the development process and the testing procedure of an in-house-built, effective downhole desander for sucker rod pumps on the basis of a sophisticated analytical design model. In weak reservoir zones, often the strategy to prevent equipment damage due to sand by-production is the sand exclusion method using a gravel pack. Nevertheless, a certain amount of small sand grains still enter the wellbore and may damage the sucker rod pumping system over time. In early 2018, various types and sizes of downhole desander configurations were tested at the pump testing facility (PTF) at the University of Leoben (Montanuniversitaet Leoben). In a period of about 4 months, testing took place under near field conditions to find the optimum and most efficient design. The design optimization was focused on the geometry of the swirl vanes and the sand separation distance at the sucker rod pump intake. An analytical model provided the basis for geometric optimization. Concurrently, field tests of the in-house downhole desander were performed in the Vienna Basin that confirmed the findings of the tests at the PTF. The test results have shown that the downhole desander design and the pumping speed are the most influencing parameters on sand separation efficiency. Poor design in combination with a wrongly selected pumping speed can reduce the sand separation efficiency to lower than 50%, while if all parameters are chosen correctly, the sand separation efficiency can be 95% or higher. The grain size distribution is the additional parameter that enables a decision and ranks the performance. The sensitivity analysis, performed for several downhole desander types, has shown the high dependency of the sand separation efficiency on the major desander design parameters. Proper selection of the components and operating parameters will contribute to an increase in the meantime between failures. This paper will present the testing configurations, the development of the high-efficiency in-house downhole desander, and the sensitivity analysis performed on the design.
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有杆泵井下除砂器的研制及效率测试
紧张的经济形势推动了对低成本石油生产的需求,这对成熟油田的生产尤其具有挑战性。因此,增加故障间隔时间和设备损坏限制是必要的。成熟油田中有相当数量的井正遭受副产砂的困扰。本文的目的是在复杂的分析设计模型的基础上,展示一种自制的有效的有杆泵井下除砂器的开发过程和测试过程。在弱储层中,通常采用砾石充填排砂的方法来防止副产砂对设备造成损害。然而,一定数量的小砂粒仍会进入井筒,随着时间的推移可能会损坏有杆泵系统。2018年初,在Leoben大学(Montanuniversitaet Leoben)的泵测试设施(PTF)测试了各种类型和尺寸的井下除砂器配置。在大约4个月的时间里,在近场条件下进行了测试,以找到最佳和最有效的设计。设计优化的重点是旋涡叶片的几何形状和抽油杆泵进气处的离砂距离。分析模型为几何优化提供了依据。同时,在维也纳盆地进行了内部井下除砂器的现场测试,证实了PTF测试的结果。试验结果表明,井下除砂器的设计和抽速是影响砂分离效率最大的参数。糟糕的设计加上错误的抽速选择会使分离砂效率降低到50%以下,而如果所有参数选择正确,分离砂效率可以达到95%或更高。粒度分布是支持决策和对性能进行排序的附加参数。对几种井下除砂器类型进行的敏感性分析表明,除砂效率高度依赖于主要的除砂器设计参数。正确选择元件和操作参数将有助于增加故障间隔时间。本文将介绍测试配置、高效井下除砂器的开发以及对设计进行的灵敏度分析。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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