Simultaneous Determination of Ba and Sr in Oilfield Produced Water by ICP-AES
نویسندگان
چکیده
Oil is an important non-renewable resource for the world. The application of alkaline-surfactant-polymer flooding has successfully enhanced the oil recovery in Chinese oilfields. The oilfield produced water is the layer water that came from the oil well along with the oil in the alkaline-surfactant-polymer flooding. Thus, the treatment process of oilfield produced water to meet the reinjection standard is an important issue for oil production and environment. The component of the oilfield produced water complexly, and the salinity high is one of the characteristics of the oilfield produced water. The main reason is the existence of a large number of ions that easy to scaling (such as Ba2+, Sr2+, CO32and SO42-) and they are easy to form carbonate precipitation (such as BaCO3, SrCO3, BaSO4, and SrSO4) in the production pipelines. Therefore, the determination of Ba and Sr in oilfield produced water is an essential step for water quality analysis of oilfield produced water. In this paper, a method for the simultaneous determination of Ba and Sr in oilfield produced water by ICP-AES was established. The working conditions of the apparatuses were optimized. The detection limit of Ba and Sr was 0.066 and 0.051. The relative standard deviation of Ba and Sr was 0.43% and 0.68%. The recovery within standard solution of Ba and Sr was 96.6% and 103.7%.
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