In this article is review an experience of PJSC "Gazprom neft" at well cost estimation, methodologies development and building IT instruments for well cost calculation. The process from sketch diagrams to IT realization is presented and this process includes concept phase, transformation of needs to requirements to IT products, methodologies development, development of IT alghoritms, prototyping and verification via testing tools and validation through approbation at production units of company. At the final there are some conclusions about using this alghoritms and tools and future plans.

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