Аnalysis of the causes and methods used to mitigate scale deposits at the production wells in Western Siberia

A comprehensive analysis of all failures and replacements of subsurface lifting equipment in one region of Western Siberia on a well stock with problems due to scale deposits has been carried out. In total, about 2,500 equipment replacements (electrical submersible pump) were carried out due to failures during the period 2019–2023. All wells with complications were either equipped with a pre-connected device to prevent scale precipitation, or routine maintenance was carried out on the wells using chemical agents. Based on the results of data collection and systematization, the main objects with the highest number of failures and complications were identified. A total of 24 formations were selected, where about 1,400 equipment replacements were carried out during this period. For these objects, a search was carried out to identify systemic causes of the formation of scale deposits with additional analytical studies. Complications at Cretaceous and Jurassic formation have different origins. Newly gained experience on Jurassic formation production can be used to draw up new regulations and methodological recommendations, since the current set of measures and the work program have certain limitations. As part of the analysis, a pilot scheme for data collection, generalization and analysis has been prepared, which can then be expanded to a full neural network. In particular, several databases were combined and new databases were prepared based on initial laboratory studies that had not previously been considered when analyzing the causes of equipment failure. The approaches and results independent producers are analyzed, which allows us to identify best practices and compare different approaches and methods of dealing with complications.

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