2017 Fiscal Year Final Research Report
Optimization of Drilling Fluid Circulation System in Superhot Enhanced Geothermal Drilling with Fluid Loss and Gas Kick
| Project/Area Number |
26420842
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Earth system and resources engineering
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| Research Institution | Akita University (2017)
The University of Tokyo (2014-2016) |
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Principal Investigator |
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| Research Collaborator |
Nurul Aimi Ghazali 東京大学, 大学院工学系研究科
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| Project Period (FY) |
2014-04-01 – 2018-03-31
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| Keywords | 地熱開発 / EGS / 掘削 / 逸泥 / ガスキック / 泥水循環 / 超臨界地熱開発 |
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| Outline of Final Research Achievements |
The purpose of this study is to develop and propose a new concept of drilling fluid circulation system that enables to adequately control both lost circulation and gas kick simultaneously occurring for safe superhot geothermal drilling on the basis of the managed pressure drilling technology. A model to estimate the loss rate was developed by use of a traditional fracture model and it was combined with a transient wellbore flow simulator. Drilling a model well that represented a simultaneous lost circulation and gas kick situation was simulated to evaluate the proposed new concept managed pressure drilling method. Also, fundamental study on development of a new deflocculant for drilling fluid in high temperature conditions.
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| Free Research Field |
石油・天然ガスおよび地熱開発における掘削工学
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