JAPEXにおけるCCS/CCUS技術指針の策定とその適用事例

抄録

In October 2020, the Japanese government declared an ambitious climate goal, targeting net-zero greenhouse gas emissions by 2050 and aiming for a 46% reduction by 2030 relative to 2013 levels. In alignment with this goal, JAPEX, in collaboration with other consortium members, has been selected for seven projects by JOGMEC. These initiatives are strategically aligned with achieving the 2050 carbon neutrality objective and securing a stable energy supply.

In March 2022, JAPEX introduced technical guidelines for CCS/CCUS, with a particular focus on new wells, the utilization of existing wells, and the plug and abandonment of wells. These guidelines, based on international standards and expert consultations, are designed to facilitate the practical application and commercialization of CCS/CCUS technologies. A significant application of these guidelines was demonstrated during the well workover carried out in 2023.

The technical specifications contained in the guidelines mandate the installation of two cement barriers for well abandonment and include specific measures to prevent CO₂ leakage. The implementation of these guidelines in the workover operations, transitioning from a deep depleted gas layer to a shallower oil layer, conducted by JAPEX, emphasizes cost-effectiveness and considers the potential for future CCS/CCUS projects.

This initiative highlights the continuous efforts and the necessity for periodically updated guidelines to ensure the effective and reliable deployment of CCS/CCUS technologies in achieving Japan’ s carbon-neutral goals.