Key words: major project, conceptual design, design logic, project phase, information value, cost engineering.
This article is devoted to the major projects preparation and implementation system used in Gazprom Neft for development of new hydrocarbon deposits. Special focus is made on key elements of the system: project phasing, elaboration of conceptual solutions, work of project teams, including at the stage of Implementation. Detailed consideration is given to the main principles of project division into phases and selection of development concept subject to the existing uncertainties and risks. The author describes phased decision-making methods and approaches to conceptual design illustrating usage of these tools with examples of projects which have already been or are being implemented.