【作者】 李晓辉；

【导师】 李舟波；

【作者基本信息】 吉林大学 ， 地球探测与信息技术， 2006， 硕士

【摘要】 本文就束缚水饱和度参数的难于确定，但它却在泥质砂岩导电模型中起着重要作用的事实，而对束缚水饱和度进行了深入研究。 本文依据岩心分析资料，明确束缚水饱和度参数的关键影响因素是岩石的孔隙结构；从理论、实验及生产实际三个方面进行分析和验证，建立束缚水饱和度的界限划分标准，这是本次研究中的创新点。以统一标准下的束缚水饱和度为基础，应用常规测井资料、核磁测井资料及常规与核磁相结合的方法，在海拉尔盆地的乌尔逊凹陷和贝尔凹陷，分别建立了束缚水饱和度解释模型。由于核磁测井资料在划分孔隙结构上的优越性，因此，应用核磁测井资料提供的不同孔隙组分计算的束缚水饱和度精度较高。最后，根据不同的测井资料占有情况而选择不同的解释模型，并对模型精度进行了验证。优化后的解释精度能够满足生产的要求。更多还原

【Abstract】 The log interpretation of shaly sands with complicated configuration, such as low-resistivity oil/gas reservoirs and high-resistivity water reservoirs, is always in the regard of the log analysts owing to the influences of the complex lithology and porosity structure on the calculation of the formation parameters. Thus water-bearing reservoir and oil-bearing reservoir are difficult to distinguish with the log data. The same problem exists in Daqing oil field, especially in its periphery. In order to solve the problem, many three-porosity electrical conduction models aiming to describe the effect of the complex porous structure on the shaly sands conductivity have been presented In the application of the models, the calculation of three porosities, including free porosity, microporosity and clay porosity, are involved. Usually, the three porosities are calculated with irreducible saturation, clay saturation and bulk porosity. But the irreducible saturation, of the three parameters, is difficult to exactly estimated, and some studies on the determination of the irreducible saturation are presented in the paper.These studies are held in Hailaer basin of Daqing oil field. Firstly, the relations of the irreducible saturation with shaly content, porosity, granularity and the content of clay are analysed. The porosity structure of rock is thought as the main factor in affecting the irreducible saturation according to the analysis.Secondly, from three aspects of theories, experiments and practices, microporosity has been deeply reviewed to clarify the limit among free更多还原