Publications

Discovered in 1971 and developed in the mid-1970s, the Arun Field was a cornerstone of Indonesia’s energy landscape, and one of its largest natural gas producers. Its development positioned Indonesia as a global LNG export leader during the 1980s and 1990s. While the field’s production has since declined, the depleted gas reservoir offers a promising opportunity for Carbon Capture, Utilization, and Storage (CCUS), through the untried mechanism of CO2 Enhanced Gas Recovery (EGR), and Carbon Capture and Storage (CCS), with a total Original Gas in Place (OGIP) of 16.68 trillion cubic feet (TCF). The reservoir offers extensive capacity and long-term CO₂ sequestration potential.

This research evaluates the CCUS and CCS potential of the Arun Field through an integrated subsurface study and multiple development scenarios. The study explores scenarios for enhancing hydrocarbon recovery through CO2 injection in unswept areas, followed by the utilization of reservoir capacity for full CO2 storage until the economic limit is reached.

Results show an initial gas production increase of up to 207 BSCF, supporting economic viability in early CCUS phases. A subsequent transition to CCS allows continued contribution to emissions reduction. The comprehensive CO2 storage assessment reveals a capacity of 504.14 million metric tons (MMt) of CO2 equivalent by the end of the injection period under combined CCUS and CCS scenarios.

In conclusion, the Arun Field’s unique geological characteristics, proximity to significant emission sources, and existing infrastructure underscore its potential as a critical player in Indonesia’s CCUS and CCS strategy. By leveraging this potential, Indonesia to strengthen its role in regional emissions reduction, positioning the Arun Field as a pivotal element in Southeast Asia’s climate change mitigation efforts.