用泥质含量估算孔隙度的方法探讨

Discussion of Porosity Estimation Method with Shale Volume

对于缺乏孔隙度测井资料的油田老区,利用标准电极系测井资料,通过"岩心刻度测井"的方法建立测井孔隙度解释模型。利用经岩心刻度后的孔隙度测井数据,与对应深度点的泥质含量交会拟合,得到孔隙度计算关系式。通过实例验证,利用泥质含量计算储层孔隙度与岩心分析孔隙度吻合很好。因此认为在老区测井评价过程中,没有孔隙度测井资料的条件下定量求取储层参数,通过泥质含量反算孔隙度是一种行之有效的方法。

For old oil wells with lack of porosity logging data, using standard electrode system logging data, logging interpretation porosity model can be established by‘core calibration logging'. With crossplot fitting of porosity logging data after core calibration and shale volume in the corresponding depth, porosity calculation formula was got. As validated by examples, reservoir porosity calculated by shale volume and core analysis porosity are well-matched.Therefore, for logging interpretation in old oil regions, no porosity logging data conditions, obtaining quantitative reservoir parameters by shale volume calculate porosity is an effective method.