A Lookback Analysis of the Long-Term Sustainability of Chemical Stimulation Jobs in an Offshore Field

Abstract

Chemical stimulation has long been recognised as an effective production enhancement technique for restoring well productivity and mitigating near-wellbore formation damage. Across mature oil fields, stimulation treatments are routinely employed to address various production impairments arising from fines migration, scale deposition, drilling and completion damage, organic deposits, and other flow restrictions. The success of these treatments is typically measured using immediate post-job production gains, productivity improvements or short-term incremental oil response. However, as producing assets mature, intervention decision-making increasingly extends beyond immediate production response. Mature fields are commonly characterised by increasing water cut, sand production, declining reservoir pressure, aging well completions and rising intervention costs. Under these conditions, achieving an initial production uplift may no longer be sufficient justification for a stimulation campaign. Instead, the sustainability of the production gain becomes a critical factor in determining whether the intervention ultimately delivers long-term value.