研究了锥直磨粒射流、旋转磨粒射流和直转混合磨粒射流的流场特性和破岩能力

IF 6.1 1区工程技术 Q2 ENERGY & FUELS

Petroleum Science Pub Date : 2025-06-01 DOI:10.1016/j.petsci.2025.04.010

Jing-Bin Li , Ergun Kuru , Wen-Bin Li , Chen-Rui Guo , Gen-Sheng Li , Zhong-Wei Huang

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引用次数: 0

摘要

径向射流钻井技术有望成为一种高效开发地热资源的技术。然而，低破岩效率是阻碍RJD技术发展的主要障碍。通过数值模拟和实验分析了锥直磨粒射流、旋转磨粒射流和直转混合磨粒射流的流场特性和破岩能力。结果表明：锥直磨料射流轴向速度高，切向速度基本为零，径向速度也较小，射流冲击区域集中在中心；锥直磨料射流在花岗岩上破碎时形成直径仅为25mm的深孔。由于有导向叶轮的存在，旋转磨料射流基本上没有轴向速度，切向和径向速度最高，因此可以将花岗岩破碎，形成直径约55mm的孔和中心凸起。直转混合磨料射流同时具有较大的轴向/切向/径向速度，因此可以破碎花岗岩形成直径约52 mm的孔，凸起度低。结果表明，直转混合磨料射流结合了锥直射流和旋转射流的优点，更适合于RJD工艺。研究成果可为高效破岩成孔技术的发展提供参考，促进地热开发领域RJD技术的发展。

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The flow field characteristics and rock breaking ability of cone-straight abrasive jet, rotary abrasive jet, and straight-rotating mixed abrasive jet

Radial jet drilling (RJD) technology is expected to be a technology for the efficient exploitation of geothermal resources. However, the low rock-breaking efficiency is the major obstacle hindering the development of RJD technology. The flow field characteristics and rock breaking ability of cone-straight abrasive jet, rotary abrasive jet, and straight-rotating mixed abrasive jet are analyzed by numerical simulations and experiments. Results show that the axial velocity of the cone-straight abrasive jet is high, the tangential velocity is basically zero, the radial velocity is also small, and the jet impact area is concentrated in the center. A deep hole with a diameter of only 25 mm is formed when the cone-straight abrasive jet breaks the granite. Due to the presence of the guiding impeller, the rotary abrasive jet basically has no axial velocity and has the highest tangential and radial velocity, so it can break the granite to form a hole with a diameter of about 55 mm and a central bulge. The straight-rotating mixed abrasive jet has a large axial/tangential/radial velocity at the same time, so it can break the granite to form a hole with a diameter of about 52 mm with a low bulge. The results show that the straight-rotating mixed abrasive jet combines the advantages of the cone-straight jet and the rotary jet, and is more suitable for the RJD technology. The research results can provide reference for the development of efficient rock-breaking and hole-forming technology, and promote the development of RJD technology in the field of geothermal development.

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来源期刊

Petroleum Science 地学-地球化学与地球物理

CiteScore

7.70

自引率

16.10%

发文量

311

审稿时长

63 days

期刊介绍： Petroleum Science is the only English journal in China on petroleum science and technology that is intended for professionals engaged in petroleum science research and technical applications all over the world, as well as the managerial personnel of oil companies. It covers petroleum geology, petroleum geophysics, petroleum engineering, petrochemistry & chemical engineering, petroleum mechanics, and economic management. It aims to introduce the latest results in oil industry research in China, promote cooperation in petroleum science research between China and the rest of the world, and build a bridge for scientific communication between China and the world.