Methods, systems and devices that utilize a mobile
offshore drilling unit (MODU) with other integrated equipment, hereinafter a mobile offshore
production unit (MOPU) or a traditional floating
production unit (FPU) to produce
oil and natural gas from an oil and gas containing
subsea geological formation are described. When the MOPU / FPU consumes all produced
natural gas in one or more processes onsite to produce products selected from power,
liquid petroleum products,
hydrogen gas,
solid carbon, and combinations thereof, then the
production unit is transformed into a Modular MOPU™. Some produced
natural gas is used to generate
electricity for normal facility operations and additional
natural gas consumed to generate
electricity for various 4th-phase processes or used as feedstock for the production of value added products in
processing equipment such as
pyrolysis units, and / or gas-to-liquids units. Maximizing consumption of produced natural gas onsite, optimizes
oil production without flaring, and without any export pipelines.