Project Overview

This study builds on the high-level inventory of CO₂ storage resources in saline aquifers across Indonesia, first launched in 2023 (ERIA–BRIN, 2023). Deep saline aquifers are porous and permeable reservoir rocks containing saline water in the pore spaces between grains. Due to their depth and salinity, this water cannot be technically or economically exploited for surface uses.

The 2023 ERIA–BRIN study estimated Indonesia’s CO₂ storage potential in saline aquifers at 680.57 Gt across 21 sedimentary basins. While this provides a valuable overview of the scale and distribution of potential storage resources for large-scale, long-term CCS projects, the estimates carry varying degrees of technical uncertainty and commercial feasibility. A more detailed assessment is therefore essential to ensure the effective and safe implementation of CCS, as well as to clarify associated costs – both of which are prerequisites for mobilising investment. This research focuses on the Ngimbang and Nona Fields, systematically analysing their geological characteristics and refining key parameters to reduce uncertainties in CO₂ storage evaluations through both static and dynamic approaches. In addition, it assesses lifecycle costs of CO₂ storage in the study area.

The results of this research provide critical insights for sustainable development and strategic economic planning in the region, particularly in the context of global climate change.