Numerical Study on Mechanism and Parameters Optimization of Temporary Plugging by Particles in Wellbore

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2021-11-01 DOI:10.2118/208585-pa

Tao Zhang, Ming Li, Jianchun Guo, Haoran Gou, Kefan Mu

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引用次数: 4

Abstract

The temporary plugging by particles in the wellbore can open new perforation clusters and increase stimulated reservoir volume, but the temporary plugging process of particles is not clear. Therefore, in this paper, we take an ultradeep well in the Tarim Basin as the research object and establish a numerical model based on the coupled computational fluid dynamics-discrete element technology (CFD-DEM) approach, which accurately describes the movement process and mechanism of the temporary plugging particles in the wellbore. Furthermore, the influence of flow rate, concentration of injected particles, and the injected mass ratio of particle size on the temporary plugging effect were studied, respectively. In addition, based on the results of the orthogonal experimental analysis, we obtained the pump rate as the primary factor affecting the effect of temporary plugging, and we recommended the optimal operation parameters for temporary plugging by particles in the field: The pump rate is 2 m3/min, the concentration of the injected temporary plugging particles is 20%, and the ratio of the mass of the injected temporary plugging particles with particle size 1 to 5 mm to the mass of the temporary plugging particles with particle size 5 to 10 mm is 3:1. Finally, a single well that had implemented temporary plugging by particles was used to verify the recommended optimal temporary plugging operation parameters. The research results of this paper provide important guidance and suggestions for the design of temporary plugging schemes on the field.

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井筒颗粒暂堵机理及参数优化的数值研究

颗粒在井筒中的临时封堵可以打开新的射孔簇，增加受激储层体积，但颗粒的临时封堵过程尚不清楚。因此，本文以塔里木盆地的一口超深井为研究对象，建立了基于耦合计算流体力学离散元技术（CFD-DEM）的数值模型，准确描述了暂堵颗粒在井筒中的运动过程和机理。此外，还分别研究了流速、注入颗粒浓度和注入颗粒质量比对暂堵效果的影响。此外，基于正交实验分析的结果，我们得出了泵速是影响暂堵效果的主要因素，并在现场推荐了颗粒暂堵的最佳操作参数：泵速为2 m3/min，注入的临时堵塞颗粒的浓度为20%，粒径为1-5的注入的临时阻塞颗粒的质量比 mm至颗粒尺寸为5至10的临时堵塞颗粒的质量 mm为3:1。最后，以实施颗粒暂堵的单井为例，验证了推荐的最佳暂堵操作参数。本文的研究成果为现场临时封堵方案的设计提供了重要的指导和建议。

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 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.