Research on key influencing factors of natural gas commodity rate for W offshore gas field group

To identify the key constraints on the natural gas commodity rate and facilitate cost reduction and efficiency improvement in offshore gas fields, this paper takes the domestic W offshore gas field group as the research object. Based on actual production gas flow data, the composition and sources of non-commercial gas, including self-consumed gas and lost gas, are systematically analyzed. The results show that self-consumed gas and lost gas are the core factors affecting the commodity rate. Self-consumed gas accounts for 63.6% of the non-commodity volume, mainly consumed by platform gas-fired power generator and onshore terminal gas booster compressors, while lost gas primarily originates from light hydrocarbon recovery reduction and flare venting. On this basis, comprehensive consumption-reduction measures are proposed, including optimizing compressor operating modes, retrofitting gas-driven equipment with electric-driven ones, applying plasma flare ignition technology, and adjusting process parameters of light hydrocarbon recovery. The above measures can reduce non-commodity gas volumes, thereby effectively improving the natural gas commodity rate and providing an practical technical scheme for enhancing quality and efficiency in offshore gas fields.