The investment project is a system of quantitative ideas about its geological and physical properties, used in the calculations of field development. The field of deposits and deposits is a system of quantitative ideas about the process of extracting oil and gas from the subsoil. Generally speaking, any combination of reservoir models and development process can be used in an oil field development model, as long as this combination most accurately reflects reservoir properties and processes. At the same time, the choice of a particular reservoir model may entail taking into account any additional features of the process model and vice versa.