Assessment of Liquefied Natural Gas Project Economics and Infrastructure Requirements for the Nigerian LNG Train 7 Expansion, Bonny Island, Rivers State

The Nigeria Liquefied Natural Gas Train 7 expansion at Bonny Island, Rivers State, represents the most significant addition to Nigeria's gas monetisation capacity in over two decades, and its economic viability and infrastructure requirements merit systematic technical and economic assessment from a petroleum engineering perspective. This study assesses the project economics and primary infrastructure requirements for the NLNG Train 7 expansion. Published project data, including the nameplate liquefaction capacity of 8 million tonnes per annum, feed gas composition requirements, and capital cost estimates, are reviewed and contextualised within current LNG market conditions. A simplified cash flow model is constructed to estimate project Net Present Value and Internal Rate of Return across base, upside, and downside LNG price scenarios at spot prices ranging from 6 to 14 USD per million British thermal units. Feed gas supply commitments from upstream OML operators are evaluated against contractual tie-in volumes, and technical challenges associated with the integration of Train 7 with existing utilities including power generation, seawater cooling, and nitrogen generation are discussed. The study further examines the domestic gas supply obligations embedded in the project's host government agreements and their impact on overall revenue projections. Results indicate that Train 7 generates positive NPV across all evaluated price scenarios above 8 USD per million BTU. Keywords: LNG economics, NLNG Train 7, Bonny Island, gas monetisation, Rivers State.