| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Outline of Final Research Achievements |
In order to efficiently and sustainably extract shale gas from deep subsurface, the permeability of the proppant-treated fractures are examined in detail. In this work, we have observed the evolution of permeability in the proppants and the proppant-treated fractures under the simulated stress and temperature conditions. In addition, the mechanisms of the permeability change were investigated. The experimental results show that the permeability in the proppants little changes for about 100 days, while it decreases with time significantly in case of the proppant-treated fractures. The reduction may be the interpenetration of the proppants and the mineral re-precipitation.
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