火烧山油田储层裂缝发育特征新认识

根据毛管压力、相对渗透率曲线形态及有关参数，对火烧山油田储层裂缝发育特点进行了研究。研究结果认为：火烧山油田低孔渗、高排驱压力、高进汞饱和度具大平台段的毛管压力曲线是由于加压后微细裂缝张开所致，而这种张开高导流裂缝大都是在打开油藏以后产生的；火烧山油田储层处于一遇应力扰动便产生裂缝的岩石力学临界体状态。

NEW IDEA ON FRACTURE CHARACTERISTICS OF RESERVOIR IN HUOSHAOSHAN OILFIELD

On the basis of the shape of capillary pressure and relative permeability curve.and related parameters.the fracture characteristics of reservoir in Huoshaoshan oilfield were discussed.It is concluded that capillary pressure curve with low porosity,low permeability,high displacement pressure,high mercury injection saturation and large platform segment resulted from open mini fracture after pressurization,while this kind of open fracture with high transmissibility mostly formed after the perforation of reservoir.Therefore,we presented a new idea:reservoir in Huoshaoshan oilfield exists as a critical body of rock mechanics,i.e.fracturing occurs once stress disturbance is imposed.