書誌事項
- タイトル別名
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- Detection of Flow-pathway Structure based on Pore Pressure Distribution Estimated from Micro-seismic Events
- ビショウ ジシン ジョウホウ カラ モトメタ カンゲキ スイアツ ブンプ ニ モトズク チョリュウソウナイ ノ リュウロ コウゾウ ヒョウカ
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抄録
In the hydraulic stimulation, a number of micro-seismic events are commonly observed. It is believed that injected fluid flows through subsurface pre-existing fractures, and the fluid flow raises pore-pressure in those fractures, and finally the raised pore-pressure triggers micro-seismic events. In the previous work of Osada et al. (2005), we have considered carefully such a scenario and come up with a method to estimate pore-pressure distribution in a rock formation by analyzing the observed data of micro-seismic events. On the other hand, pore pressure distribution along flow-pathways should change according to the location of flow-pathways and the distribution of hydraulic conductivity along them. Therefore, it could be possible to estimate flow-pathway structure as it gives a good explanation of the pore pressure distribution. Based on this idea, in the present work we propose a new method to estimate the flow-pathway structure. We assume an appropriate model of flow-pathway structure and optimize it as the pore pressure distribution estimated numerically by the model agrees well with the pore pressure distribution estimated from micro-seismic events by the method proposed in the previous work. Then we accept the most optimized model as the answer to represent the actual flow-pathway structure.We demonstrated how we can optimize the model of flow-pathway structure according to synthetic pore pressure distributions in 1D and 2D cases. Finally we applied this method to Soultz field in France and estimated the subsurface flow-pathway structure. The results were in good agreement with the flow logs carried out in the injection well.
収録刊行物
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- 日本地熱学会誌
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日本地熱学会誌 30 (1), 49-60, 2008
日本地熱学会
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詳細情報 詳細情報について
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- CRID
- 1390282681103274112
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- NII論文ID
- 130003624394
- 10021161620
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- NII書誌ID
- AN00333995
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- ISSN
- 18835775
- 03886735
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- NDL書誌ID
- 9383335
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- データソース種別
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- JaLC
- NDL
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可