Lirio

Lirio Oil and Gas Field Profile

Location and Geology

• The Lirio Oil and Gas Field is located in Block 17, offshore Angola, approximately 140 km from the Angolan coast. It is situated in water depths ranging between 1,100 and 1,400 meters.
• The field is part of the CLOV (Cravo, Lirio, Orquidea, Violeta) development project, which covers an area of about 381 square kilometers.

Discovery and Production

• The Lirio field was discovered in 1998.
• Production from the Lirio field, along with the other fields in the CLOV project, commenced in June 2014.

Operator and Partners

• The field is operated by TotalEnergies, which holds a 38% interest in Block 17. Other partners include Equinor (22.16%), ExxonMobil (19%), BP Exploration Angola Ltd. (15.84%), and Sonangol P&P (5%).

Reservoirs and Oil Types

• The Lirio field, along with Cravo, produces oil from Oligocene reservoirs. This oil is characterized by an API gravity of 32-35°, which is one of the best qualities in Block 17.
• In contrast, the Orquidea and Violeta fields produce mixed Oligocene and Miocene oils, with API gravities ranging from 20-30°. These oils are more permeable and viscous.

Infrastructure and Development

• The CLOV project, including the Lirio field, involves a network of subsea infrastructure. This includes 34 subsea wells (19 producers and 15 water injectors) tied back to the CLOV floating production, storage, and offloading (FPSO) unit.
• The FPSO, built by Daewoo Shipbuilding & Marine Engineering (DSME), has a production capacity of 160,000 barrels of crude oil per day and a gas treatment capacity of 6.5 million cubic meters per day. It also has an oil storage capacity of 1.8 million barrels.
• The project utilizes an all-electric subsea multi-phase pumping system to enhance oil recovery, particularly for the more viscous oils from the Orquidea and Violeta fields.

Phase 2 Development

• The CLOV Phase 2 project, which includes additional development of the Lirio field, was sanctioned in 2018 and started production in December 2021. This phase involves the drilling of seven additional wells and is expected to reach a production rate of 40,000 barrels of oil equivalent per day by mid-2022. The estimated resources for Phase 2 are approximately 55 million barrels of oil equivalent (Mboe).

Contractors and Local Content

• Several contractors were involved in the development, including GE Oil & Gas for gas turbines and compressors, Subsea 7 for subsea pipelines and infrastructure, and Technip for dynamic and static umbilicals. Local content was emphasized, with over 10 million man-hours of work executed in Angola and significant integration of Angolan employees into the project teams.

Environmental and Operational Efficiency

• The project is designed to ensure 'zero flaring' under normal operations, with gas either exported to an onshore liquefaction plant or used to support other Block 17 operations.
• The use of variable-speed drive (VSD) systems and an all-electric FPSO helps in controlling energy consumption and improving operational efficiency.