«Equipment and technologies for oil and gas complex»

Acid compositions influence on the formation of organochlorine compounds in oil

UDC: 665.6:547.4
DOI: -

Authors:

¹ AEL Expert, Kazan, Russia

Keywords: organochlorine, OChC, acid compositions, naphtha, commercial oil, hydrochloric acid treatment of wells, OChC formation

Annotation:

The author of the article considers the process of organochlorine compounds (OChC) formation during the interaction of oil with a hydrochloric acid composition used for treating the bottomhole zone of the reservoir. The research was conducted in order to study the specific features of organochlorine compounds formation when oil interacts with acidic compounds. To achieve this goal, the following actions were carried out: determination of organochlorine compounds mass fraction in acid compositions from different manufacturers; determination of the content of OChC in oil; mixing of acid compositions with oil, followed by heating to 50 and 80 °C; determination of OChC content in a mixture of oil with acid composition before and after heating; conducting pilot field tests of acid compositions in wells with monitoring changes of OChC content in oil over time. Gas chromatographic and X-ray fluorescence methods of investigation were used by the author during work. The practical significance of the lies in reducing the risk of commercial oil contamination by OChC as a result of hydrochloric acid treatment of wells. The study resulted in substantiating the fundamental possibility of OChC formation due hydrochloric acid treatments. Practical recommendations for controlling OChC content in oil after hydrochloric acid treatments are given in the article.

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