INTEGRATED FIELD MANAGEMENT TO ALLOW EFFECTIVE SCALE CONTROL DURING THE WATER CYCLE IN MATURE OIL FIELDS

摘要

Scale control within produced fluids as water follows the cycle of injection, production, processing and reinjection in oil/gas production facilities is critical to the effective production of hydrocarbons in a safe, economic and environmentally acceptable manner. The scale challenges associated with seawater injection into a South American offshore reservoir with a moderate Barium Sulfate scale challenge (180 ppm Barium within the formation water) are described. An integrated scale management strategy addresses these issues based on tracking production rates, ion chemistry changes and amount/composition of the suspended solids to evaluate the requirement to scale squeeze the production wells. The impact of the reservoir stripping mechanism on scale ions concentration and the resulting impact on scale inhibitor chemical required to control scale is outlined. The selection of scale inhibitors for scale squeeze application, the optimization of these treatments to enhance squeeze life is also demonstrated.