关键词: 高凝油油藏, 储层敏感性, 析蜡温度, 冷伤害, 驱油效率

Abstract:

This paper analyzes the sensitivity of high pour-point oil reservoir，fluid property and the law of water flooding with different temperature.The results show that temperature and reservoir sensitivity affect water flooding result of high pour-point oil reservoir.Because of the high wax content and the high solidifying point of oil in high pour point oil reservoir，the influence of temperature change on its rheological characteristics is large.The experimental result shows that the oleic permeability reduces along with the temperature dropping，and then temperature increases after the temperature decreasing，the permeability is recoverable，but irreversible.Temperature of high pour-point oil reservoir has a greater impact on the efficiency of water flooding.When temperature is lower than wax precipitation temperature，the wax precipitation affects the efficiency of water flooding.If the wax precipitation temperature is close to formation temperature，it will cause cold injury.So the measure should be put in practice to make the formation temperature higher than the wax precipitation temperature.Water injection well temperature test of Shen 84-An 12 block shows that strata exists cold injury at present.If the reservoir temperature drops too fast，consideration should be taken to improve the injected water temperature，make the formation temperature higher than the wax precipitation temperature and improve oil field development results.

Key words: high pour-point oil reservoir, reservoir sensitivity, wax precipitation temperature, cold injury, the efficiency of water flooding