钻孔

花岗岩套管钻孔新型微型涡轮钻探技术的全尺寸现场测试概念验证

源自径向喷射钻井的原理，开发了一种称为微型涡轮钻井的新技术，可以在非常坚硬的储层岩石中从套管钻孔中钻探微型侧线。

218378_图.jpg
微型涡轮机基本上包括五个主要部分：浸渍钻头（1）、涡轮叶轮（2）、壳体（3）、推力喷嘴（4）和入口（5）。
资料来源：论文 SPE 218378

地热项目的勘探风险很高，因为往往达不到所需的经济生产率。石油和天然气行业的增产方法，例如径向喷射钻井 (RJD)，可用于经济有效地在主钻孔周围创建流动路径，但由于储层特别坚硬，通常不适用于地热应用。因此，一种称为微型涡轮钻探 (MTD®) 的新技术得以开发，该技术可以从套管钻孔甚至非常坚硬的储层岩石中钻探微型侧线。

该方法基于 RJD 操作原理。然而，使用微型钻井涡轮机代替喷射喷嘴来驱动机械钻探岩石的钻头。

这项研究展示了 MTD 概念验证的结果，该研究是在瑞士 BedrettoLab 花岗岩岩石深处 1,053 英尺（321 m）深处进行的。

本摘要摘自 N. Geissler、Fraunhofer-Einrichtung f r Energieinfrastrukturen und Geothermie IEG 和 Fraunhofer-Chalmers 研究中心工业数学的论文 SPE-218378-PA；F. Garsche、Vitalii Samus 和 Berker Polat，Fraunhofer-Einrichtung f r Energieinfrastrukturen und Geothermie IEG；F. Di Mare，波鸿鲁尔盲大学；和 R. Bracke，Fraunhofer-Einrichtung for Energieinfrastrukturen und Geothermie IEG。该论文已经过同行评审，并可在 OnePetro 的 SPE 期刊上以开放获取形式获取。

原文链接/jpt
Drilling

Proof of Concept in a Full-Scale Field Test for the Novel Micro-Turbine Drilling Technology From a Cased Borehole in Granite Rock

Derived from the principles of radial jet drilling, a new technology called micro-turbine drilling is developed to allow for drilling of micro-sidetracks from cased boreholes in very hard reservoir rock.

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The micro-turbine basically comprises five main parts: impreg drill bit (1), turbine wheel (2), housing (3), thrust nozzles (4), and inlet (5).
Source: Paper SPE 218378

Exploration risks of geothermal projects are high, as required economic production rates are often not achieved. Stimulation methods from the oil and gas industry, such as radial jet drilling (RJD), which can be used to cost-effectively create flow paths around a main borehole, are usually not applicable in geothermal applications due to especially hard reservoir formations. Because of that, a novel technology called micro-turbine drilling (MTD®) has been developed, which allows for the drilling of micro-sidetracks from cased boreholes even into very hard reservoir rock.

The approach is based on the principles of the RJD operation. However, instead of a jetting nozzle, a microdrilling turbine is used to drive a bit that mechanically drills rock.

This study presents the results of the proof of concept for MTD, which was conducted in the BedrettoLab in Switzerland at a depth of up to 1,053 ft (321 m) in granite rock.

This abstract is taken from paper SPE-218378-PA by N. Geissler, Fraunhofer-Einrichtung für Energieinfrastrukturen und Geothermie IEG and Fraunhofer-Chalmers Research Center for Industrial Mathematics; F. Garsche, Vitalii Samus, and Berker Polat, Fraunhofer-Einrichtung für Energieinfrastrukturen und Geothermie IEG; F. Di Mare, Ruhr-Universität Bochum; and R. Bracke, Fraunhofer-Einrichtung für Energieinfrastrukturen und Geothermie IEG. The paper has been peer reviewed and is available as Open Access in SPE Journal on OnePetro.