| In this paper,according to the actual needs of fracturing bottom water reservoir in order to improve the recovery rate,the concept of early water plugging is adopted to make full use of the formation energy and prevent formation of water channel,oil soluble resin is chosen as the selective plugging agent to reduce the reservoir damage of solid particles and liquid.Finally the objective of this paper is to study the feasibility of oil soluble blocking agent in fracturing bottom water drive reservoir.The results of static experiment on oil soluble plugging agent show that,the oil soluble plugging agent is in good dispersion in different carrying fluid.The optimum temperature of oil soluble plugging agent for oil soluble is 70°C,the lower wax content of crude oil and the longer of the dissolving time,the higher solubility of oil soluble plugging agent;oil soluble blocking agent has a good compatibility with formation water and acid solution,which is suitable for various formation conditions and technologies.The results of the dynamic experiment show that,the conductivity of composite artificial barriers formed by the oil soluble blocking agent and isolation agent are influenced by many factors,including the quality ratio of oil soluble plugging agent and isolation agent,reservoir temperature and reservoir oil saturation.The reservoir temperature mainly affects the water diversion capacity of the artificial barrier,and the oil saturation of the reservoir mainly affects the oil phase conductivity.The relationship between the height of fracture and the displacement pressure was established.The impact of the thickness of the artificial compartment,the ratio of the oil-soluble plugging agent and the isolation agent to the fracture height control was studied.The results show that the increase of the thickness of artificial barriers is the main factor of height control under the condition of low mass ratio of oil-soluble plugging agent and isolation agent. |
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