Injection Strategy Study And Effectiveness Forecast Of Aonan Oilfield Ao 157 Block

AoNan Oilfield Ao 157 Block pertains to low permeability reservoir, water flooding exploitation main expose two function questions: firstly, water breakthrough have clearly orientation, in other words ,oil well breakthrough quickly if oil well and water flood injection well in latitudinal direction; On the other hand, deficient well has a high proportion ascribe to oil layer condition difference, water inflooding effects slow ,oil well formation pressure resume slowly and producing fluid level low. In order to resolve development problems of Ao 157 block, launched a method of water injection research, forecasted and evaluated the development effect in the block of AO 157.In this paper, reference from the domestic and the external blocks of Aobaota oilfield successful experiences of water cycle, using numerical simulation to express the AO 157 blocks water cycle, designing ten water injection based on the correction in the history matching of geological model. through comparative analysis of numerical simulation, the cyclic water flooding of noting 50 days and ceasing 40 days cycle is best. Using the numerical simulation and the empirical formula to study different types sand body of water intake per unit thickness and using numerical simulation research the effect of water injection of different adjustments well patterns in summarize a set of water injection modesuit for low-permeability oil fields.In this paper ,through reaching water injection mode of low-permeability oil fields, determine a reasonable network of injection wells, different sand body reasonable water intake per unit thickness,instability water injection mode. In order to extend the period of middle and low water cut oil production, control the injection pressure, delay the increase speed of water cut to implement high-performance exploiting the low-permeability oil field.