Certain experience in development of re-structuring in various branches is accumulated complying with highest world standarts. Re-structuring in oil-and-gas complex includes three main aspects: Perfection of structure and functions of management by oil companies. Perfection of financial and economic policy of oil-and-gas companies and achievement on this basis of production efficiency, its competitiveness and improvement of all technical and economic parameters. Overcoming of gap in technical and economic aspects of companies activity. Various models of re-structuring of oil-and-gas companies in Russia and abroad are considered, their features and influencing factors are allocated.