钻孔

一种新型微型涡轮钻井技术在现有钻孔中通过套管钻出微型侧钻井的现场试验，该技术可钻进周围粘土层。

一项现场试验研究考察了在粘土地层中进行微型涡轮钻井的情况，该地层允许在一次作业中钻穿钢套管和地层。

231415_Fig.jpg
微型涡轮钻井系统地下设备的示意图。
来源：SPE 231415

本研究首次记录了微型涡轮钻井技术在黏土层中的现场应用，该钻井作业在德国马尔市一个直径为5.5英寸的套管井中进行。此次作业是为一家运营商进行的，该运营商的任务包括监测大鲁尔区上覆地层含水层。

此次作业旨在为水力试验提供基础，以确定埃姆舍尔组的垂直渗透率，目前尚无更精确的信息。

微型涡轮钻井技术是一种新型钻井方法，它允许从现有钻孔钻出微型侧钻井，进入周围岩层。这些长度达数米的微型侧钻井可用于建立岩层与钻孔之间的连接。

在这个项目中，通过六个微型侧钻，在两个指定的深度（951 英尺和 1083 英尺）钻穿了一个 1161 英尺深的钻孔，每个侧钻的均匀角度相位为 60°。

这种新方法的关键创新之处在于，可以在一次作业中完成钢套管和地层的钻探。

本摘要摘自 N. Geissler、Fraunhofer-Einrichtung für Energieinfrastrukturen und Geotechnologien IEG 和 Fraunhofer-Chalmers 研究中心工业数学的论文 SPE 231415； B. Polat，Fraunhofer-Einrichtung für Energieinfrastrukturen und Geotechnologien IEG； J. 十托伦，GEOK GmbH； F. Garsche、T. König 和 K. Schulte，Fraunhofer-Einrichtung für Energieinfrastrukturen und Geotechnologien IEG； L. Pranczke，RAG Aktiengesellschaft； F. Di Mare，波鸿鲁尔大学； R. Bracke、Fraunhofer-Einrichtung für Energieinfrastrukturen und Geotechnologien IEG 和波鸿鲁尔大学。该论文已经过同行评审，并可在OnePetro 的SPE 期刊上以开放获取方式获取。

原文链接/JPT
Drilling

Field Testing of a Novel Micro Turbine Drilling Technology for Drilling Micro Sidetracks From an Existing Borehole Through Casing Into the Surrounding Clay Formation

A field test study examines micro turbine drilling in a clay formation that allows steel casing and formation to be drilled in a single operation.

231415_Fig.jpg
Schematic representation of the underground equipment of the micro turbine drilling system.
Source: SPE 231415

This study represents the first documented field application of micro turbine drilling in a clay formation, conducted from a 5.5-in. cased borehole in Marl, Germany. The operation was performed for an operator whose tasks include the monitoring of the aquifers of the overburden in the greater Ruhr area.

The operation was intended to provide the basis for a hydraulic test to determine the vertical permeability of the Emscher Formation, for which more precise information is not yet available.

Micro turbine drilling technology is a novel drilling method that allows micro sidetracks to be drilled into the surrounding rock formation from an existing borehole. The micro sidetracks, which are several meters in length, can be used to establish a connection between the rock and the borehole.

In this project, a 1,161-ft-deep borehole was penetrated at two specified depths, 951 and 1,083 ft, by six micro sidetracks, each with a uniform angular phasing of 60°.

One of the key novelties of this new approach is that steel casing and formation can be drilled in a single operation.

This abstract is taken from paper SPE 231415 by N. Geissler, Fraunhofer-Einrichtung für Energieinfrastrukturen und Geotechnologien IEG and Fraunhofer-Chalmers Research Center for Industrial Mathematics; B. Polat, Fraunhofer-Einrichtung für Energieinfrastrukturen und Geotechnologien IEG; J. ten Thoren, GEOK GmbH; F. Garsche, T. König, and K. Schulte, Fraunhofer-Einrichtung für Energieinfrastrukturen und Geotechnologien IEG; L. Pranczke, RAG Aktiengesellschaft; F. Di Mare, Ruhr-Universität Bochum; and R. Bracke, Fraunhofer-Einrichtung für Energieinfrastrukturen und Geotechnologien IEG and Ruhr-Universität Bochum. The paper has been peer reviewed and is available as Open Access in SPE Journal on OnePetro.