Offshore gas field
The Teodorico gas field (formerly d40 PY AC) lies in the Adriatic Sea offshore Emilia Romagna region, Italy. It is owned and operated by Po Valley Energy, an oil and gas company based in Australia.
Po Valley was awarded the exploration permit for the field in July 2012, followed by a production concession in November 2014. It submitted the environmental impact assessment (EIA) report for the project in the first half of 2017.
The preliminary approval for the EIA was received in February 2019, while the final approval is expected in the fourth quarter of 2019. First gas is expected to be achieved in the second quarter of 2021.
The Teodorico gas field is located in the AR94PY licence area, which spans across 66km². It lies in a water depth of 25m outside the 12-nautical mile exclusion zone.
The field was previously owned by Eni and known as Carola/Irma field. It was discovered by the Carola-1 discovery well, which was drilled in 1986 to a depth of 2,620m. Eni drilled and tested five wells, including Irma-1, Carola-2, Irma-2X and Ametista-1 following the discovery.
Eni also acquired 120km² of full 3D seismic data, which was purchased from Po Valley along with well dataset.
The Teodorico gas field is a low-relief four-way dip closure containing gas in the Pleistocene and Quaternary intervals.
The field is estimated to contain 36.5 billion cubic feet (bcf) of proven reserves and 10bcf of probable reserves.
The field development plan includes the drilling of two production wells, with a possibility to drill two additional wells, and installation of a new normally unmanned offshore platform and fluid treatment facilities.
The new offshore platform at Teodorico will feature an integrated superstructure supported by a three-legged tubular-shaped jacket. The platform will be normally unmanned and have a design life of 25 years. It will feature a three-level deck measuring 21mx22m and a helideck.
The platform will be equipped with two gas-powered generators. It will be connected to Eni’s Naomi Pandora offshore gas processing facility located south-east through a 12km-long, 10in-diameter pipeline. Another 12km-long pipeline with a diameter of 3in will be laid to supply diethylene glycol to the new platform.
Minor modifications will be made to the Naomi Pandora platform, including installation of a gas trap, valves and a riser.
Construction of the platform and pipelines is expected to be commenced following receipt of the final EIA approval and planned to be completed by the third quarter of 2020.
Drilling of the two production wells is expected to be commenced in the second half of 2020. The drilling will carried out using a jack-up type drilling rig.
The produced natural gas liquids will undergo water separation at the new platform through two filters capable of removing solids and two activated carbon filters for removal of hydrocarbons. The separated water will be discharged into the sea.
The gas from the Teodorico platform will be transported to the Naomi Pandora platform, where it will be processed. The processed gas will be sent to Italy through existing infrastructure.
RINA D’Appolonia, an engineering consultancy based in Italy, performed the pre-front-end engineering and design (FEED) studies and EIA for the Teodorico gas field.
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