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The refining sector is the Group’s core activity, accounting for approximately 75% of the total assets. In Greece, the Group owns three out of the four refineries operating in the country, supplying approximately 65% of the Greek oil products wholesale market. The Group’s domestic refineries at Aspropyrgos, Elefsina and Thessaloniki cover approximately 65% of the country’s total refining capacity, with a composite Nelson complexity index of 9.3.

Their location (coastal refineries) and high complexity give them the competitive advantage of easy access to and processing of all types of crude oil that are available in the region. Furthermore, the logistics infrastructure offers a storage capacity of 6.65 million m3 for crude and products. 


Daily Refining
Annual Refining
Refinery TypeNelson
Αspropyrgos1487.5Cracking (FCC)9.7


The Group’s domestic refineries operate as a single refining system (hub). Consequently, monthly crude oil supply, production planning and sales forecast are integrated processes for the entire system, thus maximizing refining value and profits for the Group, always based on domestic demand and current prices in the regions of Eastern Mediterranean and Southeast Europe. The Group’s ability, due to the refineries’ increased complexity, to process intermediate products (SRAR, VGO) and adjust its crude slate and oil processing levels, considering prevailing refining economics, is a key competitive advantage.

Aspropyrgos Refinery

The high-complexity, FCC-type refinery in Aspropyrgos was built in 1958. One of the most modern refineries in Europe, it has undergone several upgrades, the most important ones being:

  • 1986: residue conversion project and installation of FCC, mild hydrocracker, visbreaker and CCR units,
  • 1999: refining capacity increase to 148,000 bbl/d and
  • 2004: revamp and extensive upgrade of the conversion units.
  • 2019: completion of the conversion of the gasoline blending components MTBE and TAME production units into ETBE and TAEE production units respectively and the Aspropyrgos refinery began producing bio-ethers.

Bunkering fuel specifications globally changed in 1.1.2020 (IMO/MARPOL Directive). The Aspropyrgos refinery began implementing the new IMO production standards in November 2019, in order to respond to changes in the market. In particular, the refinery further diversified its crude slate through processing very low sulfur crude oils (“IMO crude oil”), with the objective of producing 0.5% sulfur fuel oil and marine gasoil. As both the Elefsina and Thessaloniki refineries do not produce high sulphur fuel oil, no adjustments are required in their operation.

The refinery has a significant number of distillation and conversion units, including: a fluid catalytic cracker (FCC), a vacuum distillation unit, a mild hydrocracker and a visbreaker for processing atmospheric residue. It has a significant gasoline production capacity through the isomerization and reforming units (CCR).

The refinery fully complies with the new environmental regulations and safety requirements. It delivers petroleum products in accordance with the highest EU standards.

The refinery is very flexible regarding production, storage and distribution of products as it owns a large private port, an extensive crude oil pipeline network from and to the crude oil unloading and storage terminal at Pachi, Megara, and a pipeline for finished and semi-finished products from and to the Elefsina refinery. It also has the main responsibility for fuel supply through pipeline to the "Eleftherios Venizelos" Athens International Airport.  The refinery is connected to the natural gas network with significant benefits in energy effeciency and environmental performance.

Elefsina Refinery

The Elefsina refinery has a refining capacity of 106 kbpd. In 2012 a  €1.5 billion upgrade project was completed, making it one of the most modern and complex in the Mediterranean region, with a high pressure hydrocracker complex and a flexicoker.

It is a strategically important refinery for the Group, due to its high storage capacity (3,3 m. m3 of crude oil and petroleum products) and the logistics infrastructure for imports and exports management, including a large private port. The refinery is connected to the crude oil terminal at Pachi, Megara and to the Aspropyrgos refinery through a pipeline network.

The upgraded refinery has significantly boosted the Group’s competitiveness, as it increased the yield of middle distillates through maximising processing of high-sulphur crude oil for the production of diesel (ULSD). The refinery has a Nelson Complexity Index (NCI) of 12 and a Solomon Complexity Index of 14.

In addtion, the upgrade also reduced emissions, thus significantly improving the environmental impact, while in recent years the reduction of basic gaseous emissions per unit of supply continued.

The refinery has an increased flexibility in terms of crude oil supply, as it can process 100% high-sulfur crude oil, heavy crude oil products and semi-finished products in the hydrocracker complexes.

Middle distillates yield (diesel, jet) exceeds specifications with more than 65%, with the respective yield at Group level over 50%.Τhis has positively contributed to the Group’s refineries’ operating performance, with the yield of high added value products standing amongst the highest in the European refining industry, highlighting the competitiveness of our asset base, following the considerable investment that was implemented during the five-year period 2007-2012.

Thessaloniki Refinery

The Thessaloniki refinery is of a hydroskimming type and has a 1.4 m. m3  storage capacity. It is the only refinery in Northern Greece, with capability of supplying both the domestic market and the neighboring countries in Southeast Europe.

The refinery’s upgrade was successfully completed in 2011 and consisted of into three main projects: (a) distillation units revamping, (b) storage capacity increase for better flexibility in crude oil supply, and (c) a new Continuous Catalytic Reformer (CCR, 15,000 bbl/d) as well as a desulfurization unit for maximizing gasoline and diesel production.

It is connected to the Group’s facilities in Skopje through a pipeline.

The new Continuous Catalytic Reformer Unit (CCR) enables the refinery to process additional naphtha from the Elefsina refinery, on top of own naphtha production, maximising the system refining margins.
Moreover, its energy efficiency was improved following refinery targeted interventions works on piping and steam traps.


OKTA Facilities

In 1999, the Group acquired the OKTA facilities in Skopje through its subsidiary, EL.P.ET. BALKANIKI.

OKTA is connected to the Thessaloniki refinery through a pipeline for the transportation of high added value products. Its location offers a significant competitive advantage in terms of the distribution of products into the local market, through marketing companies, and exports to neighboring countries in the Balkans.