Abstract: In order to solve problems including lack of underground system energy consumption index on oil field water injection system and deficient over ground system energy consumption index, this article puts forward the energy consumption index of underground water injection system according to water injection effectiveness in different reservoir types and blocks. Major Reservoir parameters including permeability, porosity, saturation pressure, formation water salinity were analyzed to find relationships with essential standard unit energy consumption parameters on ground water injection system as well as the pressure and quantity of flow on wellhead. The research synthesizes the effectiveness assessment systems of ground water injection and reservoir water inject and recovery; oil field exploration profit is maximized with water injection energy consumption substituting water injection quantity. By adding station effectiveness and pipe network energy efficiency as energy consumption index on ground water injection system, a completed ground and underground water injection assessment index were established. Such index assists to evaluate the energy consumption of the whole water injection system and provides guidance for evaluating energy consumption condition of water injection system.

Key words: water injection, reservoir type, block, energy consumption index, system construction