Field-Proven Mobile LNG Technology Shifts From Flaring to Power Generation

_ This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper SPE 229088, “From Flare to Power: Field-Proven Mobile LNG Technology for Decarbonizing Oilfield and Off-Grid Energy Use Cases,” by Slim Hbaieb, Hugo Bizzo Sotomayor, and Gabriel Sotomayor, Macaw Energies. The paper has not been peer-reviewed. _ This paper introduces a field-deployable, trailer-mounted liquefaction system engineered to convert flared or stranded gas into low-carbon liquefied natural gas (LNG). The objective is to evaluate how this mobile LNG platform can mitigate methane emissions while displacing diesel across oilfield service operations, including drilling and hydraulic fracturing, and enabling off-grid electric-vehicle (EV) charging and heavy-duty transportation. Its scope includes life-cycle-emissions benchmarking across diverse geographies and use cases. Introduction The environmental and economic case for flare-gas recovery has been studied extensively, highlighting both global mitigation potential and deployment challenges at scale. In these scenarios, even when flare gas can theoretically be captured and used, the following three core challenges hinder investment: - Volume variability: Associated gas production often fluctuates with oil flow, leading to unpredictable availability. - Uncertain duration: Wells may have short production horizons, limiting return on fixed infrastructure. - High capital-expenditure (CAPEX) thresholds: Centralized solutions require long asset life and steady volumes to justify cost. Infield power generation using conditioned gas to feed gas engines or turbines often is a partial solution. However, this approach depends on being able to consume all generated power onsite, which is rarely practical. Many pads do not have enough power demand to match the gas available, and the lack of grid-export options leaves operators with limited alternatives. The described platform, the F2X, was developed to fill this gap. By converting flare gas into LNG directly at the wellsite, the platform transforms excess gas into a dense, transportable, and storable energy product, enabling the following: - Offsite use in applications such as industrial power and transportation - Diesel displacement within a regional radius (e.g., drilling rigs and remote operations) - Emissions reduction and compliance with flaring regulations Unlike infield gas engines that require immediate and total consumption, LNG allows flexible timing and distribution of energy use. This decouples gas capture from power demand, unlocking broader value for stranded gas resources while reducing environmental impact. Technology Overview The unit is a fully integrated, trailer-mounted LNG production platform designed for field mobility, modularity, and standalone operation. It consists of the following five core trailers, each fulfilling a critical process function: - Gas-treatment trailer: Performs CO2 removal through amine absorption, dehydration through molecular sieves, and optional heavies/natural-gas liquid (NGL) separation depending on feed-gas composition - Compression trailer: Boosts inlet gas to optimal pressure levels for refrigeration cycles - Liquefaction trailer: Employs a refrigerant loop and brazed plate exchangers to achieve high liquefaction efficiency - Control and automation trailer: Hosts human/machine-interface panels, supervisory control and data acquisition architecture, and Azure internet-of-things cloud integration for real-time monitoring, control, and diagnostics - Power-generation trailer: Provides energy fueled by tail gas, ensuring off-grid capability and energy self-sufficiency