New Insight on Deformation of Walnut/Ceramic Proppant Pack under Closure Stress in Hydraulic Fracture: Numerical Investigation

Q4 Chemical Engineering

Journal of Chemical and Petroleum Engineering Pub Date : 2019-12-01 DOI:10.22059/JCHPE.2019.278547.1274

Mohammad Hasan Badizad, A. S. Dehaghani

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引用次数: 2

Abstract

This study is an attempt to investigate the mechanical behavior of proppant packs deforming under compression loading. A generalized confined compression test (CCT) was simulated in the present study to investigate the deformation of walnut/ceramic proppants against compression. In this way, the CCT was simulated using ABAQUS explicit code. Unlike ordinary CCT, we obtained permeability of compressed packs through image processing of deformed packs. It was observed that a pack with small particles could markedly withstand deformation, however, at the expense of having lower permeability. Also, selecting a proper proppant pack strongly depends on the prevailing stress regime, where at low stress ( 40 Mpa), the pack with more ceramic is the best choice. Mixtures of walnut and ceramic proppants showed greatly strength improvement compared to similar cases with pure walnut granules. As a result, making use of such packing is highly recommended due to significant mechanical stability and also being of lower price compared to packs of pure ceramic granules.

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水力裂缝闭合应力作用下核桃/陶瓷支撑剂充填变形的新认识:数值研究

本研究旨在探讨支撑剂充填体在压缩载荷下变形的力学行为。本研究模拟了广义受限压缩试验(CCT)，以研究核桃/陶瓷支撑剂在压缩下的变形。这样，利用ABAQUS显式代码对CCT进行了模拟。与普通的CCT不同，我们通过对变形包进行图像处理获得压缩包的渗透率。结果表明，具有小颗粒的储层可以显著地承受变形，但代价是渗透率较低。此外，选择合适的支撑剂充填在很大程度上取决于当前的应力状态，在低应力(40 Mpa)下，含有更多陶瓷的充填是最佳选择。与纯核桃颗粒的支撑剂相比，核桃和陶瓷支撑剂的混合物的强度有了很大的提高。因此，强烈推荐使用这种包装，因为它具有显著的机械稳定性，而且与纯陶瓷颗粒包装相比价格更低。

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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