Characterization of pore systems in seal rocks using Nitrogen Gas Adsorption combined with Mercury Injection Capillary Pressure techniques
Characterization of pore systems in seal rocks using Nitrogen Gas Adsorption combined with Mercury Injection Capillary Pressure techniques
复制标题
DOI：
10.1016/j.marpetgeo.2012.09.001
复制
发表时间：
2013-01-01
影响因子：
4.2
通讯作者：
dos Santos, Viviane S. S.
中科院分区：
文献类型：
--
作者：
Schmitt, Mayka;Fernandes, Celso P.;dos Santos, Viviane S. S.
来自巴西地质构造内不同深度的密封岩石样品的多孔微观结构参数与预测固有渗透率的经验模型相关。将汞注射毛细管压力（MICP）和氮气吸附（N（2）GA）作为互补技术组合应用; MICP用于获得孔隙率值以及中孔和大孔的尺寸分布，并且N（2）GA与Brunauer、Emmett和Teller（BET）理论相关联以确定比表面积（S-0）。应用Barret，Joyner和Hallenda（BJH）理论来找到微孔和中孔的尺寸分布。MICP和N（2）GA曲线的组合表明，所分析的样品呈现多峰孔径分布（PSD）和范围为0.33%至10.44%的总孔隙率。通过N（2）GA测量的S-0值高于通过MICP计算的S-0值，这是由于大多数样品具有20-1000 A的平均孔径。利用实测参数、S-0曲线、PSD曲线和总孔隙度，采用Carman-Kozeny模型和串并联模型预测了储层的固有渗透率。得到的渗透率值的范围分别为4.09 × 10（-24）-4.96 × 10（-21）m（2）和9.48 × 10（-27）-9.14 × 10（-22）m（2）。这些结果进行了比较，在相关文献中报道的值，并提交给压力脉冲衰减渗透率（PDP）测试的四个样品所获得的。(c)2012爱思唯尔有限公司保留所有权利。
Porous microstructure parameters of seal rock samples originating from different depths within Brazilian geological formations were correlated to empirical models which predict the intrinsic permeability. Mercury Injection Capillary Pressure (MICP) and Nitrogen Gas Adsorption (N(2)GA) were applied in combination as complementary techniques; MICP to obtain the porosity values and the size distribution of meso- and macropores, and N(2)GA associated with the Brunauer, Emmett and Teller (BET) theory to determine the specific surface area (S-0). The Barret, Joyner and Hallenda (BJH) theory was applied to find the size distribution of the micro- and mesopores. The combination of the MICP and N(2)GA curves showed that the samples analyzed present a polymodal pore size distribution (PSD) and a total porosity ranging from 0.33 % to 10.44 %. The S-0 values measured by N(2)GA were higher than those calculated by MICP, due to the majority of the samples having a mean pore size of 20-1000 A. The intrinsic permeability could also be predicted applying the measured parameters, S-0, PSD curves and total porosity in the Carman-Kozeny and Series-Parallel models. The ranges of permeability values obtained were 4.09 x 10(-24)-4.96 x 10(-21) m(2) and 9.48 x 10(-27)-9.14 x 10(-22) m(2), respectively. These results were compared with values reported in the related literature and those obtained for four samples submitted to pressure pulse decay permeability (PDP) tests. (c) 2012 Elsevier Ltd. All rights reserved.