Diagnosis of the state of the reservoir system based on the entropy approach

Abstract

Investigation of the energy balance of the oil fields development process by thermodynamic methods shows that the production of reservoir fluids leads to irreversible energy losses, and the use of optimal operating conditions minimizes these losses. Studies were conducted to determine the degree of order of the reservoir system, based on an analysis of the positive and negative signs of production values and changes in the entropy increment, an estimation was made of the self-organization of dynamic open systems far from the equilibrium state. Based on the concept of entropy production, an analysis was made of the main technological data of the oilfield development, which allowed us to determine the boundaries of the transient processes of the reservoir system and evaluate the estimated recoverable oil volumes. The proposed approach, taking into account the reservoir system transient processes using dynamic analysis and the concept of entropy production, allows to obtain reliable predicted values of the recoverable volumes of hydrocarbons and make reasoned decisions on choosing a strategy for oil and gas fields development. Keywords: oil field; development; entropy production; echnological development indicators.