The role of pore pressure and its prediction in deep geothermal energy drilling – examples from the North Alpine Foreland Basin, SE Germany

IF 1.9 4区 地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY Petroleum Geoscience Pub Date : 2022-02-03 DOI:10.1144/petgeo2021-060
M. Drews, I. Shatyrbayeva, D. Bohnsack, F. Duschl, P. Obermeier, M. Loewer, F. Flechtner, M. Keim
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引用次数: 2

Abstract

Pore pressure prediction is a well-developed key discipline for well planning in the hydrocarbon industry, suggesting a similar importance for deep geothermal wells, especially, since drilling cost is often the largest investment in deep geothermal energy projects. To address the role of pore pressure prediction in deep geothermal energy, we investigated pore pressure-related drilling problems in the overpressured North Alpine Foreland Basin in SE Germany – one of Europe's most extensively explored deep geothermal energy plays. In the past, pore pressure was mainly predicted via maximum drilling mud weights of offset hydrocarbon wells, but recently more data became available, which led to a re-evaluation of the pore pressure distribution in this area. To compare the impact of pore pressure and its prediction, 70% of all deep geothermal wells drilled have been investigated for pore pressure-related drilling problems and two deep geothermal projects are given as more detailed examples. Thereby, pore pressure-related drilling problems were encountered in one third of all wells drilled, resulting in several side-tracks and an estimated drilling rate decrease of up to 40%, highlighting the importance of accurate pore pressure prediction to significantly reduce the cost of deep geothermal drilling in overpressured environments. Thematic collection: This article is part of the Geopressure collection available at: https://www.lyellcollection.org/cc/geopressure
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孔隙压力在深层地热能钻探中的作用及其预测——以德国北部阿尔卑斯前陆盆地为例
孔隙压力预测是油气行业井规划的一门重要学科,对于深地热井也同样重要,因为钻井成本往往是深地热能项目的最大投资。为了解决孔隙压力预测在深层地热能中的作用,我们研究了德国东南部超压北阿尔卑斯前陆盆地的孔隙压力相关钻井问题,该盆地是欧洲勘探最广泛的深层地热能区之一。过去,孔隙压力主要通过邻井最大钻井液比重进行预测,但近年来随着资料的增多,对该地区孔隙压力分布进行了重新评价。为了比较孔隙压力的影响及其预测,对70%的深地热井进行了与孔隙压力有关的钻井问题调查,并以两个深地热井为例进行了比较详细的分析。因此,三分之一的钻井遇到了与孔隙压力相关的钻井问题,导致多个侧钻道,估计钻井速度下降高达40%,这凸显了准确的孔隙压力预测对于显着降低超压环境下深层地热钻井成本的重要性。专题合集:本文是地质压力合集的一部分,可在https://www.lyellcollection.org/cc/geopressure找到
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来源期刊
Petroleum Geoscience
Petroleum Geoscience 地学-地球科学综合
CiteScore
4.80
自引率
11.80%
发文量
28
审稿时长
>12 weeks
期刊介绍: Petroleum Geoscience is the international journal of geoenergy and applied earth science, and is co-owned by the Geological Society of London and the European Association of Geoscientists and Engineers (EAGE). Petroleum Geoscience transcends disciplinary boundaries and publishes a balanced mix of articles covering exploration, exploitation, appraisal, development and enhancement of sub-surface hydrocarbon resources and carbon repositories. The integration of disciplines in an applied context, whether for fluid production, carbon storage or related geoenergy applications, is a particular strength of the journal. Articles on enhancing exploration efficiency, lowering technological and environmental risk, and improving hydrocarbon recovery communicate the latest developments in sub-surface geoscience to a wide readership. Petroleum Geoscience provides a multidisciplinary forum for those engaged in the science and technology of the rock-related sub-surface disciplines. The journal reaches some 8000 individual subscribers, and a further 1100 institutional subscriptions provide global access to readers including geologists, geophysicists, petroleum and reservoir engineers, petrophysicists and geochemists in both academia and industry. The journal aims to share knowledge of reservoir geoscience and to reflect the international nature of its development.
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