相对渗透率法评定储集层岩石表面润湿性

A RELATIVE PERMEABILITY METHOD FOR ASSESSING THE MOISTENINC CAPACITY OF RESERVOIR ROCK SURFACE

李琴

Li Qin

江苏油田地质科学研究院, 江都 225261

Geological Scientific Research Institute of Jiangsu Oil Field

作者通过理论分析,认为用相对渗透率法,即用相对渗透率曲线特征值、水相渗透率与油相渗透率的比值与含水饱和度关系及Kw(Sor)/Ko(Swc)比值,评定润湿性在理论上可靠,与实际油田结合,定性结果可信度高.该方法与现行的驱替法、离心机法并用,能使润湿性评价更为客观.在无润湿性实验资料情况下,用相渗资料评定润湿性,可以弥补资料空白.

After theoretical analyses,the author considers that the assessment of moistening capacity by a relative permeability method,that is,by the characteristic value of relative permeability curves,the relationship between the permeability ratio of water factes to oil f actes and water-bearing saturability and the ratio of Kw(Sor)/Ko(Swc)is reliable theoretically.When combined with data from actural oil fields,qualitative results have high reliability.This method used together with a present displacement method and a centrifugal machine method can make moistening Capacity evaluation more objective.When experimental data of moistening capacity is unavailable,factes permeability data can be used to assess moistening capacity in order to make up gaps in the data.

https://doi.org/10.11781/sysydz199604454