Sisi-Nubi

Sisi-Nubi Oil Field Profile

Location

The Sisi-Nubi Oil Field is located offshore in the Mahakam Block, approximately 25 kilometers east of the Mahakam Delta in East Kalimantan, Indonesia. The coordinates for the field are -0.928, 117.712 (WGS 84).

Operator and Ownership

The field is operated by Pertamina Hulu Mahakam (PHM), a subsidiary of Pertamina, which is the state-owned oil and gas company of Indonesia. Pertamina is the owner of the Sisi-Nubi Oil Field.

Discovery and Production

The Sisi-Nubi Oil Field was discovered in 1989. Production at the field began in 2007. The field is part of the larger Mahakam complex, which includes other fields such as Handil Oil and Gas Field, Peciko Gas Field, Stupa Oil and Gas Field, Tunu Oil and Gas Field, Jumelai Oil and Gas Field, and the Mahakam Oil and Gas Block.

Production and Reserves

As of 2017, the Sisi-Nubi Oil Field produced approximately 23.34 million barrels of oil per year. The field is also involved in gas production, although specific current gas production figures are not provided in the available sources. However, the ongoing development projects aim to enhance both oil and gas reserves.

Current Development Projects

Pertamina Hulu Mahakam has initiated the Offshore Field Development Project (OPLL-3B) to optimize the development of the Sisi-Nubi field along with the Peciko and South Mahakam fields. This project involves drilling and connecting 32 infill wells, perforation activities, and workovers. The project is expected to increase the Mahakam Block’s gas reserves by approximately 75 billion cubic feet (Bcf) of gas and 1 million barrels (MMbbl) of condensate. Peak production from this project is anticipated to be achieved in 2026, with estimated production of around 70 million standard cubic feet per day (MMscfd) for gas and 1,200 barrels/day for condensate.

Technological and Operational Enhancements

The development of the Sisi-Nubi field has benefited from the integration of new evaluation tools and software. These tools have improved the accuracy of production forecasts and optimized field development by considering surface and subsurface limitations. Projects such as the installation of wellhead compressors and the use of drag reducer agents have been implemented to enhance production efficiency, particularly during the late life of the gas field.

Economic and Strategic Significance

The Mahakam Block, including the Sisi-Nubi field, is crucial for Indonesia’s oil and gas production. The gas produced in this block is essential for various industries, including fertilizer, petrochemicals, power generation, and city gas in East Kalimantan. The project aligns with PHM’s commitment to continuous gas well development and is supported by government incentives, which have improved fiscal terms for the Mahakam Block.

Regulatory and Approval

The OPLL-3B Offshore project has received the final investment decision (FID) approval from SKK Migas, the Indonesian upstream oil and gas regulatory body. This approval is a significant milestone in the development of the Mahakam Block.

In summary, the Sisi-Nubi Oil Field is a key component of Indonesia's oil and gas production, operated by Pertamina Hulu Mahakam, and is undergoing significant development to enhance its production capacity and reserves.