Development of monitoring approach for injected CO2 in CO2 capture and storage using change in seismic attenuation and velocity

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K18332
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Earth system and resources engineering
• Research Institution: Kyushu University
• Principal Investigator: Ikeda Tatsunori 九州大学, カーボンニュートラル・エネルギー国際研究所, 助教 (00736845)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: 二酸化炭素地中貯留 / モニタリング / デジタル岩石物理 / 地震波

Outline of Final Research Achievements

By analyzing continuous field seismic data and numerical simulation using digital rock, we obtained the following achievements related to monitoring in CO2 capture and storage. (1) We developed a method to monitor spatial and temporal variation of seismic velocity in shallow subsurface using controlled seismic source system. This method could be applied to improve the accuracy of monitoring of deep reservoirs by considering near-surface variation, and to identify CO2 leakage in shallow subsurface. (2) We performed seismic wave propagation simulation for digital rock models with different CO2 distribution. Our results indicated that seismic attenuation has different sensitivity to CO2 distribution from seismic velocity. Using both seismic velocity and attenuation, more quantitative evaluation of injected CO2 may be possible.

Free Research Field

物理探査