Abstract
In this paper, the corrosion rate in the oil and gas production and collection systems of the Zhanazhol field is investigated. Research work has been carried out at the Zhanazhol field aimed at determining the rate of corrosion in oil and gas production and collection systems, as well as assessing the state of inhibitory corrosion protection. In the course of the study, pipelines and equipment of CDNG-1, CDNG-2 and CDGiK were examined. Corrosion is one of the main problems faced by oil and gas production and transportation systems, especially in the presence of aggressive hydrogen sulfide-containing liquids and wastewater. To combat this phenomenon, the KO-101 and KW-201 corrosion inhibitor is used at the Zhanazhol deposit, which is a complex composition of organic amines with additives and is used to protect pipelines and equipment from destruction. One of the advantages of these inhibitors is their ability to be introduced into the system without altering the technological process. Special attention is paid to the hydrodynamic flow of carbonated liquid, which has a significant effect on the distribution of corrosion through pipelines. Depending on the flow mode (emulsion mode, phase separation of the gas-liquid flow), corrosion manifests itself unevenly. For example, in the case of phase separation, corrosion localization is observed along the lower forming line of the pipeline. This is important because such areas are exposed to maximum exposure to aggressive components, such as the aqueous phase containing H2S, CO2 and O2.Transporting large volumes of produced water together with oil significantly reduces the capacity of pipelines and increases energy consumption due to the increased viscosity of the oil-water mixture. Moreover, this contributes to the growth of the area of corrosion damage in the oil collection system, which in turn affects the efficiency of equipment and pipelines.