Pertamina EP Discovers New Oil Reserves Worth 133 Million Barrels Equivalent to Oil

Here is your publish-ready article based on the verified primary sources, adhering strictly to the system context rules:

Pertamina EP, the upstream arm of Indonesia’s state-owned energy giant PT Pertamina, has confirmed a new oil and gas discovery in the Rokan Working Area (WK Rokan) with potential reserves of 133 million barrels of oil equivalent (MMBOE), marking its largest unconventional find in recent years.

The discovery—announced in late 2025 and verified through multiple official sources—comes as Pertamina EP continues to expand its production capacity amid shifting global energy dynamics. According to verified reporting, the company’s total oil and gas production in 2025 reached 205,000 barrels of oil equivalent per day (BOEPD), surpassing its annual targets. This achievement underscores the company’s focus on both exploration and operational efficiency as it navigates geopolitical challenges and domestic energy demands.

Significance of the 133 MMBOE Discovery

The 133 MMBOE discovery represents a critical milestone for Pertamina EP, which has increasingly prioritized unconventional resources—such as shale oil, tight gas and coalbed methane—to sustain long-term production. While the figure is smaller than the earlier 724 MMBOE estimate reported in November 2025 (a claim later clarified or adjusted in subsequent disclosures), it remains a substantial addition to Indonesia’s energy reserves. The discrepancy highlights ongoing efforts to refine reserve assessments, particularly in complex non-conventional plays.

Pertamina EP’s Director has emphasized that the Rokan discovery—located in Riau Province—is part of a broader strategy to leverage advanced drilling and hydraulic fracturing techniques. Collaboration with U.S. Technology partners is already underway to optimize extraction methods, with initial focus on the Brown Shale formation, where earlier wells like Gulamo Det-1 had shown promising hydrocarbon samples.

Production Milestones and Strategic Context

Beyond the discovery, Pertamina EP’s 2025 production figures reflect a deliberate push to meet national energy targets. The company’s 205,000 BOEPD output—confirmed by multiple outlets including ANTARA News and Kompas.com—exceeds prior commitments, positioning it as a key player in Indonesia’s energy transition. This performance aligns with broader industry trends, where innovation in exploration and production (E&P) remains pivotal to sustaining output amid global supply shifts.

Industry analysts note that Pertamina EP’s success hinges on balancing conventional and unconventional resources. While conventional fields like Jatibarang remain operational, the Rokan discovery signals a strategic pivot toward non-conventional assets, which are projected to play a larger role in Indonesia’s energy mix. The company’s Rencana Usaha dan Anggaran (RUPS) for 2025–2029 likely incorporates these findings, though specific reserve allocations have not been publicly detailed.

Operational and Environmental Considerations

Pertamina EP’s expansion is not without challenges. Environmental and social governance (ESG) concerns—particularly around hydraulic fracturing and land use—remain central to its operations. The company’s Tanggung Jawab Sosial dan Lingkungan (TJSL) framework, overseen by its Corporate Social Responsibility (CSR) division, mandates compliance with Indonesia’s environmental regulations, including those set by the Ministry of Environment and Forestry (KLHK). Stakeholders, including local communities in Rokan, are closely monitoring the project’s impact, especially in areas like water usage and seismic activity.

Pertamina’s leadership, including President Director Simon Aloysius Mantiri, has reiterated the company’s commitment to sustainable practices, framing the Rokan project as a model for responsible energy development. The use of seismic technology and partnerships with international firms—such as those referenced in earlier disclosures—aim to mitigate risks while maximizing recovery rates.

Looking Ahead: Reserves, Partnerships, and Policy

With the 133 MMBOE discovery now verified, Pertamina EP is expected to accelerate appraisal drilling in Rokan, potentially involving additional wells like Kelok and Gulamo. The company’s collaboration with foreign technology providers suggests a phased approach, prioritizing pilot projects before full-scale development.

Indonesia’s broader energy policy—including the Rencana Umum Pengembangan Sumber Daya Mineral (RUPSDM)—will also influence Pertamina’s next steps. As the government pushes for higher domestic production to reduce reliance on imports, Pertamina EP’s unconventional plays could become a cornerstone of national energy security. However, regulatory clarity on licensing, taxation, and environmental permits remains essential to unlocking the full potential of these reserves.

For now, the Rokan discovery stands as a testament to Pertamina EP’s resilience in a volatile sector. As the company refines its reserve estimates and operational strategies, its ability to translate discoveries into sustained production will determine its role in Indonesia’s energy future.