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Abstract

Summary

CO2CRC Otway project is focused on development and validation of the various components of CO2 geosequestration technology. The project site, which is located approximately 240 km South-West of Melbourne, was previously used to conduct several small (65 kt in Stage 1 and 15 kt in Stage 2) test injections of the CO2-rich gas mixture into different geological formations.

Stage 3 of the CO2CRC Otway project targets development of the low invasive downhole geophysical monitoring techniques applicable for CO2 geosequestration monitoring, pressure tomography and time-lapse (TL) seismic. To field test performance of these modalities another 15 kt injection will be conducted in 2020–2021.

The TL seismic will include 4D VSP acquired with DAS and conventional vibroseis sources and continuous monitoring using permanently deployed seismic sources. A multi-well monitoring array comprised of six ∼1.5–1.7 km deep wells was deployed on site covering approximately 1 km2. We utilized distributed fiber optic sensing to monitor drilling and completion of the wells. In this presentation we discuss fiber optic instrumentation of the array and preliminary outcomes of the DAS monitoring.

© EAGE Publications BV
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/content/papers/10.3997/2214-4609.202030004
2020-03-09
2024-04-26

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References

  1. AlNasser, H., Pevzner, R., Tertyshnikov, K., Popik, D. & Urosevic, M.
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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.202030004
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Monitoring Drilling and Completion Operations Using Distributed Acoustic Sensing: CO2CRC Stage 3 Project Case Study
Conference Proceedings 2020, 1 (2020); https://doi.org/10.3997/2214-4609.202030004
/content/papers/10.3997/2214-4609.202030004
/content/papers/10.3997/2214-4609.202030004
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