The Optimization Research Of Injection And Production Rate Deployment Method For Commingling Production Fault-block Reserviors

Multilayer reservoirs located in eastern china which mainly comprise clastic sediments from continental depositional environment are characterized by severe inter-layer heterogeneities.Due to the restriction of production technology,commingling production is usually adopted in order to improve the single well productivity.In other words,a set of well pattern is applied into several layers of reservoir.In this paper,with typical well groups as the objects,several methods of injection and production rate deployment is put forward using numerical simulation technology in order to realize equilibrium displacement for single well group of monolayer production fault-block reservoirs and commingling production fault-block reservoirs.The deployment method of injection and production is proposed based on the oil-water two-phase unsteady percolation theory.As for the whole reservior,oil-well propration is optimized using nonlinear optimization method so as to realize the maximization production of the entire reservoir.The results show that there're several factors affecting injection and production proration.The proration difference increases with the increasement of dip angle,permeability and the differences of reservoir thickness and saturation between different injection-production units.The optimization research of injection and production rate deployment for the whole reservior is proved to be able to improve the developing contrditions and maximize oil production,which provides certain guiding significance for the development of commingling production fault-block reserviors.