10:15 AM - 10:30 AM
[HSC05-06] Study for the mechanism to the effect of improvement of CO2 storage efficiency by micro bubble injection technology
Keywords:Geological CO2 Storage, microbubble, flow simulation, capillary pressure
From core flooding test by using Berea sand stones with length of 7cm and 30 cm, it was indicated that not only CO2 saturation was increased but CO2 Storage was increased in core and CO2 dissolution to water was advanced by MB-CO2 injection technology. Moreover, CO2 was injected in area of small pore size, in which it was difficult to inject by normal injection technology, by MB-CO2 injection technology.
We proceed to make the 3D flow simulation model based on core flooding tests by normal and MB CO2 injection and evaluate the parameters which indicate characteristics of MB injection. As a result of these simulation studies, it was indicated that capillary pressure curves calculated based on core flooding tests were different between normal and MB injection and were also related to the differences of injection area between normal and MB injection in spite of same sample (Berea sand) , fluids (brine and CO2) and condition (pressure, temperature and flow rate).
This study is part of an R&D project “the Development of Safety Management Technology for Large-Scale CO2 Geological Storage”, commissioned to the Geological Carbon Dioxide Storage Technology Research Association by the Ministry of Economy, Trade and Industry (METI) of Japan and attributed to basic study for micro bubble CO2 injection technology by Tokyo-gas Co., Ltd. and RITE. We deeply appreciate them.