| Budget Amount *help |
¥18,330,000 (Direct Cost: ¥14,100,000、Indirect Cost: ¥4,230,000)
Fiscal Year 2012: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2011: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2010: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2009: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
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| Research Abstract |
Carbon dioxide (CO_2) is injected into geological formations to mitigate climate change. First, CO_2 displaces brine which fills pore space of porous rock. This process is strongly influenced by capillarity, buoyancy and viscous shear stress. Next, brine displaces CO_2 again, but some fraction of CO_2 would be trapped in porous rock because of capillarity. Then trapped CO_2 bubbles would be solved into the brine. In a reservoir scale, dissolution of CO_2 into the brine is limited by the natural convection due to the density differences between unsaturated and saturated brine with CO_2. We experimentally investigated these processes in a pore scale by means of X-ray computer tomography. To predict long-term fate of the injected CO_2, novel mathematical models were developed for each process.
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