[H-SC07] CCUS (Carbon Dioxide Capture, Utilization, and Storage) for Climate Mitigation

[HSC07-P05] The initiatives for the development of the permanent seismic source and the improvement of data quality for the CCS monitoring

*Keisuke Teranishi¹, Yuki Imai¹, Takao Nibe², Takuya Miura², Takeshi Tsuji³ (1.JGI, 2.JAPEX, 3.The University of Tokyo)

Keywords:Portable Active Seismic Source (PASS), CCS/CCUS

Accurate monitoring techniques with high repeatability, as well as spatial and temporal resolution, are essential for tracking the subtle changes in reservoirs and cap rock during Carbon Capture and Storage (CCS) projects. Seismic survey methods are often used to estimate spatial plume behavior, but the high survey costs have been identified as an issue for large-scale commercial CCS operations. Early detection of reservoir integrity issues is also vital for operational control and anomaly detection, making quality improvement and time reduction of seismic reflection data processing important. Recent research has focused on geophysical monitoring techniques that use permanently installed receivers and seismic sources to reduce monitoring costs and survey periods.
In the FY2022 demonstration test, we verified the effectiveness of DAS-VSP recordings using permanently installed receivers. We also identified issues with the reproducibility of waveforms and the lack of source energy when using a small portable seismic source. (Tsuji et al., 2023)
To address these, we modified a small seismic source to increase its output energy and then evaluated its performance for CCS monitoring. We conducted the following performance evaluations for CCS monitoring purposes:
- Evaluating the optimal method for recording sweep waveforms
- Verifying the impact of enhanced output energy
- Checking for improved recording quality through waveform processing.
We will compare the results obtained through the demonstration test and discuss the factors that affect the reproducibility and quality of the records.

Reference
Tsuji, T., Arakawa, E., Tsukahara, H., Murakami, F., Aoki, N., Abe, S., & Miura, T. (2023). Signal propagation from portable active seismic source (PASS) to km-scale borehole DAS for continuous monitoring of CO2 storage site. Greenhouse Gases: Science and Technology.