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Physicochemical Characterization and Analysis of Injection Water Quality During Waterflooding at Offshore Petroleum Facilities

Vijai Kumar Baskaran, Suresh Kumar Govindarajan, Kamal Chandra Dani and Mandhir Kumar

In this research, we study the physicochemical characterization of the injection water during water flooding and the changes in the water quality during its transportation from the Main injection pump (MIP) to the Well Head (WH) at the offshore platform in Mumbai High offshore field, India. The distance between the main injection pump and the well head is approximately 15 kilometers, connected by a subsea pipeline, which is long enough to degrade the quality of injection water during its transport. Physicochemical parameters such as pH, turbidity, cations, anions, filterability, iron content, Total suspended solids (TSS), Total dissolved solids (TDS) were determined from the industrial laboratory investigations. Cerini plots were graphed to determine the relative quality of water at MIP and injector. The result indicates the addition of solid content in the water during travel to wellhead. There is also a reduction in filterability from 6.45L/30 min to 3.43L/30 min. There has been increase in iron content from 0.01 mg/L to 6.85 mg/L. The research showed that there was deterioration in the quality of injection water during the transportation through the pipeline. An injection water treatment plant was recommended at the Mumbai High offshore platform after this study.