储层参数压力敏感性研究

储层压力变化会引起储层物性参数（如渗透率）发生相应变化。岩石覆压渗透率与净有效覆压呈指数凝减关系，且渗透率变化不可逆；岩石覆压孔隙度与净有效覆压成二次三项式递减关系；裂缝型地层与碎屑岩地层相比，压力敏感性更强。因此，研究储层参数的压力敏感性对于确定合理的试油压差是必要的。

Study on Sensitivity to Pressure on Reservoir Factors

The changes of reservoir pressure will result in the cianges of reservoir physical properties such as permeability and porosity.It is found in this paper that with the uplift of net effective overlying formation pressure,the reservoir permeability at the overlying formation pressure decreases exponentially and irreversibly,and also the reservoir porosity at the overlying formation pressure decreases parabolically.Furthermore,the fissured reservoir factors are much more sensitive to pressure than the clastic rock reservoir factors.Therefore the study on sensitivity to pressure on reservoir factors is essential to the determination of the reasonable well testing pressure difference.