Study Of Thermal Methods In The N Oilfield

Thermal recovery of heavy oil reservoir has been widely used in onshore oil fields.Due to the complicated conditions of the offshore reservoir,the thermal recovery is difficult to apply directly.So the research of the thermal recovery on the offshore is of great significance.In this paper,the numerical simulation model of a typical cyclic steam simulation oil reservoir is established.On the basis,using numerical simulation methods studies the impact of the parameters of injection-production that effect the exploitation of heavy oil.On the base of cyclic oil production,using the method of orthogonal design on the the steam injection intensity,steam injection rate and etc.six factors do optimal orthogonal design.And the incremented rate of each cycle steam injection is 20% with best results.In this paper,four thermal recovery methods are studied.Including steam stimulation,multi-thermal fluid stimulation,steam stimulation turn to steam flooding,multi-thermal fluid stimulation turn to multi-thermal fluid flooding.Thermal recovery of heavy oil reservoir plate optimization is established based on the different oil viscosity and different effective thickness.The results show that: steam stimulation is suitable for low viscosity and thick reservoir,multiple thermal fluid stimulation is suitable for low viscosity and thin reservoir,steam stimulation turn steam flooding is suitable for high viscosity and thick reservoir,multiple thermal fluid stimulation turn multiple thermal fluid flooding is suitable for high viscosity and thick reservoir.