OMLs 4, 38 & 41

Seplat Energy holds a 45% working interest in OMLs 4, 38, and 41, located onshore in Edo (OML 4) and Delta (OMLs 38 and 41) States, Nigeria.

The Company is the operator of the three blocks, which together form a single contract area under the NEPL/Seplat Joint Venture.

As operator, Seplat Energy manages day-to-day operational activities, sets production and performance targets, and leads exploration and appraisal programmes, subject to joint venture partner approvals.

Production is predominantly from six key fields — Oben, Amukpe, Okporhuru, Ovhor, Orogho, and
Sapele — with ongoing work to bring additional fields onstream. Since acquiring the blocks in July 2010, Seplat Energy has steadily increased its oil production capacity through new well drilling, asset optimisation, and the deployment of advanced technologies to enhance recovery from mature fields.

Notably, Seplat Energy was the first operator in the Niger Delta to install a Lease Automatic Custody
Transfer (LACT) unit, enabling accurate oil measurement prior to injection into the Trans Forcados
Pipeline system. This innovation significantly reduced reconciliation losses from around 18–20% to
approximately 10–12%, with further improvements to 3–5% following enhanced pipeline security. Crude oil from all assets is routed through the Amukpe–Escravos Pipeline and Trans Forcados Pipeline to the Escravos and Forcados Oil Terminals, or to the Warri Refinery.

Alongside its oil operations, Seplat Energy continues to prioritise the commercialisation of its substantial gas reserves within OMLs 4, 38, and 41, reinforcing its position as a leading supplier of gas to Nigeria’s domestic market. This is evidenced by the successful commissioning and operation of the Oben Gas Processing Plant (465 MMscfd capacity) and the Sapele Integrated Gas Plant (SIGP, 85 MMscfd capacity).

Looking ahead, Seplat Energy remains committed to sustaining and increasing its oil and gas production to meet Nigeria’s growing domestic energy demand and support the nation’s transition to cleaner energy sources.

Background

OML 4

Covering an area of 267 km², the block is located approximately 78 km northeast of Warri, Delta State. The Oben Field, situated within OML 4, is the main producing field on the block. Facilities within the block include a 60,000 bopd double-bank capacity flow station, a 465 MMscfd Non-Associated Gas (NAG) processing plant (Oben Gas Processing Plant), and an Associated Gas Compressor (AGC) station equipped with 5 x 10 MMscfd compressors. In addition, Oben hosts 2 x 1.5 MMscfd Vapor Recovery Units (VRUs) dedicated to eliminating routine flaring.Production operations and facilities are supported by the Oben Field Logistics Base. Strategically located,
the Oben Gas Hub provides access to Nigeria’s key gas demand centers and serves as a critical
component of the Company’s future gas expansion plans. The OML 4 license was renewed in 2018 for a further 20 years and is next due for renewal on 21st October 2038.

OML 38

Covering an area of 2,094 km², the block is located approximately 48 km north of Warri. There are
currently four producing fields within the block — Amukpe, Okporhuru, Orogho, and Ovhor (which
straddles OML 38 and OML 41). There are also two additional discoveries in OML 38, Mosogar and Jesse, which are yet to be brought onstream. Facilities on the block include a 45,000 bopd capacity flow station, a Liquids Treatment Facility (LTF), 2 x 50,000-bbl crude storage tanks, and 4x5.4 MMscfd compressors used for conveying associated gas to wells requiring gas lift. Projects such as the construction and installation of additional 4 × 50,000-bbl storage capacity are currently underway to strengthen the asset’s operational resilience. The OML 38 license was renewed in 2018 for a further 20 years and is next due for renewal on 21st October 2038.

OML 41

Covering an area of 291 km², the block is located approximately 50 km from Warri. There are currently two producing fields — Sapele and Ovhor (which straddles OML 41 and OML 38) and two discoveries namely Ubaleme and Okoporo. Facilities in the block include a double-bank flow station with a 60,000 bopd capacity, an 85 MMscfd non-associated gas processing plant (Sapele Integrated Gas Plant – SIGP), and a 26 MMscfd NGC-owned gas compressor station. The condensate stream is commingled with the oil for export, while produced gas is evacuated via the NGC-owned Oben–Sapele pipeline system. The OML 41 license was renewed in 2018 for a further 20 years and is next due for renewal on 21st October 2038.