Study On Deep Water Plugging And Profile Controlinfractured Biogenic Limestone Reservoir In The Wang Xu Oilfield

The main reason of production decline in Fractured Oilfield is the increase of water production caused by fracture,reasonable and effective control of water production in oil wells is the key to improve the recovery rate of fractured reservoirs.The main development layer of Wang xu zhuang oilfield is the Biogenic limestone reservoir,The reservoir has the characteristics of fault fracture development,the initial oil production capacity is high,the water is active and water free production period is short,during the water injection development process,injected water channeling along fractures,resulting the reservoir heterogeneity is serious,water cut rising rapidly,which greatly reduces the sweep area and the effect of oilfield development.Therefore,in this paper,based on the recognition of the fracture development,we screened the plugging agent,and put forward the new geological polymer plugging agent,discusses its plugging mechanism,finally to develop multi-functional composite gel system and geological polymer plugging agent to enhance the oil recovery.In this paper,from the characteristics of the block,the temperature and the degree of mineralization,as well as the plugging strength,we studied the laboratory research and field test,the results show that the composite plugging agent system can act well on the selected wells.The multi-functional composite gel system can quickly seal off the cracks and large pore channels into the formation,and the injection of the geologic polymer plugging agent is very good enough to enhance the strength of the system.The two work together to block crack and the high permeability layer,and so that the subsequent injection water bypass flow,to drive out the remaining oil,this is the purpose of increasing the amount of oil and reducing water.This implementation Wang xu zhuang oilfield biological limestone fractured reservoir efficient development and exploitation.