Wall stabilization and collapse prevention technology for geothermal drilling in shale formations in Zhuhu area

Liu Zhouhui

doi:10.20265/j.cnki.issn.1007-2993.2024-0420

Volume 39 Issue 6

Dec. 2025

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Liu Zhouhui. Wall stabilization and collapse prevention technology for geothermal drilling in shale formations in Zhuhu area[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2025, 39(6): 823-829. doi: 10.20265/j.cnki.issn.1007-2993.2024-0420

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Liu Zhouhui. Wall stabilization and collapse prevention technology for geothermal drilling in shale formations in Zhuhu area[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2025, 39(6): 823-829. doi: 10.20265/j.cnki.issn.1007-2993.2024-0420

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Wall stabilization and collapse prevention technology for geothermal drilling in shale formations in Zhuhu area

doi: 10.20265/j.cnki.issn.1007-2993.2024-0420

Liu Zhouhui

The Sixth Geological Brigade of Hubei Provincial Geological Bureau, Xiaogan 432000, Hubei, China

Received Date: 2024-09-12
Accepted Date: 2025-06-11
Rev Recd Date: 2025-04-18

Available Online: 2025-12-08

Publish Date: 2025-12-08

Abstract

Abstract

There is a significant activity difference between the geothermal drilling shale formation in the Zhuhu area and the on-site drilling fluid. The on-site drilling fluid exhibits moderate dispersibility and fails to effectively inhibit pressure transmission, resulting in poor sealing performance and serious collapse of the drilling wellbore. To solve this problem, an optimization of the on-site drilling fluid system was proposed, and an anti-collapsing drilling fluid was prepared. The drilling fluid is composed of saline water + 4% bentonite + 1% PAM+2% STQ + 1% SPKY + 1% multi-element sealing agent (2% concentration ZT-1 + 3% concentration GX-1 + 2% concentration NQ) + 1% amino polyol, which has reasonable rheological properties and can effectively inhibit the hydration expansion and dispersion of shale. It can effectively inhibit the transmission of upstream pressure to downstream, with good plugging performance, as well as good lubrication performance and resistance to drilling debris pollution. Through on-site application, it has been proven that the use of this anti-collapsing drilling fluid has prevented serious collapse and instability. At the same drilling depth, the drilling construction period has been saved 11 days, and it has achieved good wall stabilization and anti-collapsing effects.
- geothermal drilling,
- anti-collapsing drilling fluid,
- rheological properties,
- inhibitory,
- blockability,
- lubricity,
- anti drilling debris pollution,
- stabilize the wall and prevent collapse

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Wall stabilization and collapse prevention technology for geothermal drilling in shale formations in Zhuhu area

doi: 10.20265/j.cnki.issn.1007-2993.2024-0420

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Wall stabilization and collapse prevention technology for geothermal drilling in shale formations in Zhuhu area

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