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[HSC08-12] Study of advanced CO2 dissolution technology for improvement of CO2 storage efficiency
Keywords:Geological CO2 Storage, advanced dissolution, microbubble, core flooding
Reducing cost of CO2 injection and storage is important challenge for applying to commercialization. Establishing the advanced CO2 dissolution technology which controls the reservoir pressure during CO2 injection is very important to inject and store CO2 in reservoir efficiently and we focused the technology of CO2 injection as the microbubble (MB). In this study, we proceeded the unraveling the efficiency of increase of CO2 storage and the mechanism by MB-CO2 from experiment and flow simulation.
MB is formed by CO2 passed through the porous filter. In past study, it was seen that CO2 saturation which is ratio of CO2 volume divided by pore volume increase by MB-CO2 injection more than normal injection and now it is the key point to applying this technology to field scale to study for the behavior and the efficiency of MB in the well and the reservoir and the mechanism of them.
As one of the studies, we targeted the “Effective area of MB-CO2” and estimated the relation between the effective area of MB-CO2 and CO2 storage by conducting core flooding test with the long berea sand core (length : 30cm). Core flooding test was conducted at the reservoir condition (40℃, 10MPa) at which it is supercritical CO2 and CO2 saturation was increased 7.4% and CO2 Storage is also increased 30.4% in core by MB-CO2 injection as relative increase against normal injection. It was considered that these results show the effect of advance of CO2 dissolution to water by MB-CO2 injection technology. In addition, the behavior, which breakthrough time of CO2 in MB-CO2 injection was later than that in normal injection, was observed.
Acknowledgements
We appreciate Geological Carbon dioxide Storage Technology Research Association to support this study and Tokyo-gas co., Ltd. and RITE to proceed the basic study for MB-CO2 injection technology.
reference
Akai, T., Xue, Z., Yamashita, Y., Yoshizawa, M. Abu Dhabi International Petroleum Exhibition and Conference, Abu Dhabi, 2015 SPE-177672-MS
MB is formed by CO2 passed through the porous filter. In past study, it was seen that CO2 saturation which is ratio of CO2 volume divided by pore volume increase by MB-CO2 injection more than normal injection and now it is the key point to applying this technology to field scale to study for the behavior and the efficiency of MB in the well and the reservoir and the mechanism of them.
As one of the studies, we targeted the “Effective area of MB-CO2” and estimated the relation between the effective area of MB-CO2 and CO2 storage by conducting core flooding test with the long berea sand core (length : 30cm). Core flooding test was conducted at the reservoir condition (40℃, 10MPa) at which it is supercritical CO2 and CO2 saturation was increased 7.4% and CO2 Storage is also increased 30.4% in core by MB-CO2 injection as relative increase against normal injection. It was considered that these results show the effect of advance of CO2 dissolution to water by MB-CO2 injection technology. In addition, the behavior, which breakthrough time of CO2 in MB-CO2 injection was later than that in normal injection, was observed.
Acknowledgements
We appreciate Geological Carbon dioxide Storage Technology Research Association to support this study and Tokyo-gas co., Ltd. and RITE to proceed the basic study for MB-CO2 injection technology.
reference
Akai, T., Xue, Z., Yamashita, Y., Yoshizawa, M. Abu Dhabi International Petroleum Exhibition and Conference, Abu Dhabi, 2015 SPE-177672-MS