摘要
海拉尔盆地南屯组和铜钵庙组是主要的目的层,火山碎屑岩广泛发育,地层岩石中普遍含有凝灰质成分,并且凝灰质含量自上而下逐渐增多。由于储层中同时含有凝灰质和粘土矿物,使储层的孔隙结构变得复杂、渗透性变差,解释模型不适应。本文通过对比分析三种基于阳离子交换能力的饱和度模型,并对研究区块主要目的层粘土含量进行了统计分析,确定了该区块饱和度模型选用基于阳离子交换理论的威克斯曼-史密斯(Waxman-Smits)模型,在储层分类的基础上,对火山碎屑岩储层W-S模型中的m、n、Qv等参数进行了确定,通过在密闭取心井中进行验证,平均绝对误差为±8.2%,提高了饱和度参数计算精度。
Nantun formation and Tongbo formation are the principal target zones in Hailar basin where volcaniclastic rocks are widely developed. The rocks always contains tuff component and the tuffaceous content increases gradually from top to bottomd.Because the reservoirs contain both tuff and clay minerals, pore structure becomes complex and permeability gets worse. The interpretation model is not adaptive.By comparative analysis of three models based on the saturation of cation exchange capacity, and statistical analysis of the clay content in the primary target, the Waxman-Smith(Waxman-Smits) model is selected as the saturation model of this area based on the theory of cation exchange. The parameters of volcanic clastic reservoirs such as m,n and Qv are determined on classification. Through verification in sealed coring well, the mean absolute error is ±8.2%. It improves the computational accuracy of saturation parameters.
出处
《国外测井技术》
2013年第2期49-52,4,共4页
World Well Logging Technology
