The combination of both effects will result in a reduction of water and sand production. Laboratory studies were performed to optimize polymer formulation and evaluate flow properties in reservoir cores. Because of the low reservoir rock permeability (around 10-20 mD), high focus was put on polymer injectivity and RPM effects. Since 2013, nine offshore gas wells have been treated with polymers.

Treatments have shown positive results combining gas rate increase up to 100% and water reduction around 50% while stopping the sand. Details regarding well and polymer selection, job design, execution and production data are provided.

Reducing water productin from mature oil & gas fields represents a major challenge. Excessive water induces additional costs of lifting, separation, fluid treatments and disposal, as well as problems such as scales, corrosion, emulsion, bacteria development and sand production. Furthermore, water overtakes oil production in heterogeneous reservoirs. Water control becomes thus a major issue for the operators.