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Produced water is the largest volume of wastewater generated during oil and gas production. It comprises of organic and inorganic compounds. The amount of produced water from various oil fields of Upper Assam Basin are increasing with the ageing maturity of the oil field. Produced water adversely affect the environment as it contains different toxic compounds such as petroleum contaminants and impurities include oil, naturally occurring radioactive minerals, oil & grease, hydrocarbons, production chemicals and various materials. This paper determines the quantitative and qualitative characterization of physical and chemical properties of produced water generated from different depths and horizons of Upper Assam oil fields. As produced water is re-injected into the reservoir for pressure maintenance and is discharged into the environment, so its characterization is highly significant for environment and reservoir management. The characterized physical and chemical properties of produced water have higher values which will adversely affect the environment. The characterized results are validated in Lenntech software to determine the corrosion and scaling forming tendency of produced water on the basis of Ryznar stability index and Langelier saturation index. The produced water samples are found to be highly corrosive and it has tendency to form scale. The samples are also highly corrosive.
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- Quantitative and Qualitative Characterization of Oil Field Produced Water of Upper Assam Basin (India)
Subrata Borgohain Gogoi