利用压汞资料评价低电阻率油层含水饱和度

Evaluation of Water Saturation in Low Resistivity Reservoir Using Mercury Injection Data

压汞资料能有效反映储层的孔隙结构,评价低电阻率油层含水饱和度。该方法利用压汞资料得到毛细管压力与油藏高度的转化关系,确定含水饱和度与毛细管压力、孔隙度、渗透率和油藏高度的相关关系式,得到饱和度的定量评价方程,计算结果与密闭取心结果更加相符,可以为测井解释结果提供较为准确的校验值。

Mercury injection data may effectively reflect the pore structure in reservoir, and it is a very effective method to evaluate the original oil saturation in the reservoir. The basic idea of the method is： first to get the transformation relationship between capillary pressure and oil height of the reservoir using mercury injection data, then determine the relationship between water saturation and capillary pressure, porosity, permeability and the height of the reservoir, and last get a quantitative evaluation equation of the saturations. Using mercury injection data to determine the water saturation of oil reservoir with low resistivity is very simple, and provides an effective way for accurate reservoir evaluation. The result of this method conforms to sealing core drilling results very well, and can be used as a calibration value of the result of logging interpretation.