Produced Water Effluent in East Baghdad Oil Field: Treatment for Oil Recovery Application
Abstract
This study focuses on the problem of produced water (PW) in Midland Oil Company (Md.O.C)-East Baghdad Oil Field (EBOF). This type of water is produced with huge amounts in the company's subsidiary fields annually. For safely reinjection application, the collected produced water sample was subjected to several bench scale sequences of treatment including (Coagulation, Flocculation, Filtration, dissolved oxygen removing and disinfection of bacteria) to make it appropriate for reinjection. The target parameters for treatment were (pH, Oil and grease, Turbidity, suspended solids (TSS), Dissolved oxygen (DO) and Bacteria). The obtained results from final treatment stage proved that the treated parameters of water are proper to use the water for injection to increase the recovery of oil. The concentration of oil and grease was decreased from 74 mg/L in the raw water sample to less than 5mg/L after treatment. The total suspended solids (TSS) and turbidity were reduced from 164 mg/L and 45 Nephelometric Turbidity Unit (NTU) to trace and 0.15mg/L respectively. A dissolved oxygen (DO) was remediated to be 0.7mg/L from initial concentration (2.4 mg/L) via using a 100 mg/L sodium sulfite solution as oxygen scavenger. A sand filter proposed design was set and used successfully to get the required specifications of the treated produced water using in the oil recovery.
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