How Does the OB3 Pipeline Connect With the Escravos–Lagos Pipeline System?

Nigeria has significant natural gas resources, but transporting gas from production areas to the industries and power facilities that need it depends on an interconnected transmission network.

Many of Nigeria's major gas-producing areas are located in the Niger Delta, while important industrial and power-generation centres are spread across western, central and northern Nigeria. Connecting these regions requires pipeline infrastructure capable of moving natural gas between production facilities, transmission hubs and consuming markets.

The Obiafu–Obrikom–Oben (OB3) Gas Pipeline was developed to strengthen this connection. By linking the eastern gas transmission network with the Escravos–Lagos Pipeline System (ELPS) in the west, OB3 provides an additional route for transporting natural gas between major parts of Nigeria.

The connection also supports the wider infrastructure arrangement linking eastern gas supplies to the northern corridor through the Ajaokuta–Kaduna–Kano (AKK) Gas Pipeline. Understanding how these systems connect helps explain why OB3 is an important part of Nigeria's domestic gas infrastructure and why completing its River Niger crossing was a significant construction milestone.

The Escravos–Lagos Pipeline System, commonly known as ELPS, is one of Nigeria's major natural gas transmission networks. It transports gas from production and processing facilities in the Niger Delta towards industrial and power-generation centres in western Nigeria.

The system supports the movement of natural gas to facilities that rely on it for electricity generation, manufacturing and other industrial activities. ELPS is therefore an important part of Nigeria's domestic gas supply infrastructure. However, the effectiveness of a transmission network depends partly on its connections with other pipelines.

When regional systems are interconnected, gas can potentially move between more production sources and consuming markets, subject to available capacity, operational conditions and commercial arrangements. This is one of the principal reasons the OB3 pipeline was developed.

The OB3 Gas Pipeline extends approximately 130 kilometres from the Obiafu and Obrikom gas-producing areas in Rivers State towards the Oben gas transmission hub in Delta State. The wider project comprises a 48/36-inch trunk gas pipeline designed to connect the eastern gas network with the western transmission system.

The connection at Oben provides the critical link between OB3 and the western gas network, including ELPS.

Through this network arrangement, natural gas from eastern production and processing facilities can be transported towards Oben and connected to transmission infrastructure serving western Nigeria.

This creates an additional pathway for moving gas between regions that were previously more dependent on their respective transmission corridors. The connection does not mean that gas automatically flows through the system at its maximum designed capacity. Actual transportation depends on the readiness and operating conditions of the connected infrastructure.

Nevertheless, OB3's role as an interconnector is important because it strengthens the physical links between Nigeria's major gas transmission networks.

Nigeria's gas-producing regions and major consumption centres are not always located close to one another. Gas produced in eastern Nigeria may be needed by power plants, manufacturers and industrial facilities elsewhere in the country.

Without sufficient transmission infrastructure, transporting that gas between regions can be difficult. The OB3–ELPS connection is intended to address this challenge by providing additional transportation capacity between the eastern and western gas networks. The connection has several potential benefits.

Improved Gas Network Connectivity

OB3 links major regional transmission corridors, allowing gas to move through a more interconnected pipeline system. This helps reduce the limitations associated with operating regional networks without sufficient interconnections.

Greater Gas Supply Flexibility

An interconnected network can provide access to additional gas supply sources. For example, gas originating from eastern production areas can potentially reach facilities connected to the western transmission network. However, this flexibility depends on available gas volumes, pipeline operating conditions and transmission arrangements.

Support for Power Generation and Industry

Natural gas is an important fuel for electricity generation and industrial operations in Nigeria. By strengthening connections between gas-producing regions and transmission networks, OB3 can support the movement of gas towards power-generation facilities and industrial centres.

Support for Future Gas Infrastructure

Major transmission connections also provide a foundation for additional gas transportation and distribution infrastructure. As new pipeline connections and industrial demand centres develop, an interconnected network can offer more options for transporting gas between regions. These benefits depend on the wider system's operational readiness, available gas supply and downstream infrastructure.

The importance of OB3 extends beyond its connection to the western gas network. The Ajaokuta–Kaduna–Kano (AKK) Gas Pipeline is designed to extend natural gas transmission towards central and northern Nigeria.

According to NNPC Limited, OB3 forms part of the interconnection between the eastern gas pipeline network, ELPS in the west and the northern transmission corridor served by AKK. This relationship is important because the pipelines perform different functions within the wider gas infrastructure.

Together, these systems form part of Nigeria's broader effort to improve gas transportation between production areas and consuming regions. Their effectiveness depends on the physical connections between pipelines, commissioning requirements and the operating capacity of the wider network.

One of the most significant construction challenges affecting the OB3 Gas Pipeline was its crossing beneath the River Niger. The crossing required a 48-inch gas pipeline to be installed along a 2,000-metre underground route, connecting Ndoni in Rivers State with Aboh in Delta State.

The planned HDD route reached a reported depth of approximately 52 metres and encountered complex sand, gravel and rock formations. Previous specialist attempts had not completed this section, leaving a critical gap in the wider OB3 pipeline route.

We subsequently appointed by Nigerian Gas Infrastructure Company (NGIC) to execute the specialist crossing. The company used Horizontal Directional Drilling (HDD), a trenchless construction method that enables pipelines to be installed beneath obstacles without excavating an open trench across the entire crossing route.

How We Completed the Crossing

Our engineering approach included:

The equipment configuration included the GS-12000L and GD-5000L HDD rigs, providing high pulling capacity for the demanding installation. Construction began on 6 October 2025, and PCE Nigeria successfully completed the River Niger HDD crossing on 28 April 2026.

The completed installation addressed a major construction bottleneck that had affected the connection and commissioning of the wider OB3 pipeline. Its significance extended beyond the drilling operation itself. By completing the previously unfinished river-crossing section, the project removed a major physical obstacle to connecting the eastern and western gas transmission networks.

Explore PCE Nigeria's OB3 River Niger Crossing project.

According to NNPC Limited, the OB3 Gas Pipeline has a designed transportation capacity of 2 billion standard cubic feet of natural gas per day (2 Bscf/d).

This capacity reflects the scale of the pipeline's intended role within Nigeria's gas transmission infrastructure.

However, designed capacity should not be confused with actual daily gas deliveries. The amount of natural gas transported through OB3 depends on factors including:

NNPC has identified OB3 as an important part of the infrastructure intended to strengthen domestic gas supply and improve connections between regional transmission networks.

The pipeline's designed capacity therefore represents its potential transportation capability, not confirmation that the system is continuously delivering that volume.

The OB3 pipeline illustrates the importance of connecting major gas transmission systems rather than developing individual pipeline routes in isolation. A pipeline may carry gas efficiently along its own route, but its wider value depends on how effectively it connects with production facilities, transmission hubs and consuming markets.

By linking the eastern gas network with the western transmission system, OB3 helps create a more integrated infrastructure framework. Its relationship with ELPS and the northern corridor through AKK also demonstrates the importance of coordinated pipeline development. The completed River Niger crossing was an important step towards realising this network connection.

It demonstrates how specialist engineering can address a difficult physical obstacle that affects a much larger infrastructure project. For Nigeria's gas industry, OB3 provides an example of how transmission interconnections and complex pipeline construction contribute to the development of domestic energy infrastructure.

What is the OB3 Gas Pipeline?

The Obiafu–Obrikom–Oben (OB3) Gas Pipeline is an approximately 130-kilometre gas transmission project designed to connect Nigeria's eastern gas network with the western transmission system through the Oben hub.

How does OB3 connect to the Escravos–Lagos Pipeline System?

OB3 runs from the Obiafu and Obrikom areas towards the Oben gas transmission hub, where it interfaces with the western gas network, including ELPS. This provides an additional transmission connection between eastern gas supply infrastructure and western gas markets.

What is the role of ELPS in Nigeria?

The Escravos–Lagos Pipeline System transports natural gas from the Niger Delta towards industrial and power-generation centres in western Nigeria. It is one of the country's major gas transportation corridors.

Does OB3 connect to the AKK Gas Pipeline?

OB3 forms part of the wider transmission infrastructure linking eastern gas supplies with the western network and the northern corridor served by AKK. The connection is through the broader gas transmission network rather than a single direct OB3-to-AKK pipeline segment.

What is the capacity of the OB3 Gas Pipeline?

NNPC Limited states that OB3 has a designed capacity of 2 billion standard cubic feet of gas per day. This is the pipeline's design capacity, not a confirmed figure for actual daily gas deliveries.

Why was the OB3 River Niger crossing important?

The River Niger crossing was a critical unfinished section of the wider OB3 route. PCE Nigeria completed the 2,000-metre HDD crossing for the 48-inch pipeline on 28 April 2026, removing a major construction obstacle affecting the broader transmission connection.

The OB3 Gas Pipeline demonstrates why connections between major transmission networks are important for Nigeria's gas infrastructure. While individual pipelines transport gas along specific routes, interconnected systems create more opportunities to move natural gas between production areas, transmission hubs and consuming markets.

OB3's connection with ELPS and its relationship with the wider AKK corridor form part of Nigeria's effort to develop a more integrated domestic gas transportation network. Completing the OB3 River Niger crossing was a significant milestone towards this objective.

PCE Nigeria contributed to the project through specialist HDD engineering and construction, completing one of the most technically demanding sections of the wider pipeline. The company also provides pipeline EPC services, drilling equipment, drilling-fluid solutions and technical support for complex infrastructure projects.

Planning an HDD river crossing or complex gas pipeline construction project?

Explore PCE Nigeria's HDD capabilities or view the OB3 River Niger Crossing project to learn more about our engineering experience.

For project enquiries, contact wanyang@pcenigeria.com.