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Petrophysical Characteristics of Silurian Mudstones from Central Taurides in Southern Turkey
Journal of Earth Science ( IF 3.3 ) Pub Date : 2021-08-15 , DOI: 10.1007/s12583-021-1408-0
Zeynep Döner 1 , Mustafa Kumral 1 , Qinhong Hu 2 , Md Golam Kibria 2 , Hongguo Qiao 3 , Mengdi Sun 4
Affiliation  

This study used a range of integrated and complementary experiments to examine pore-structure, fluid-shale wetting characteristics, sample size-dependent porosity towards different fluids, and imbibition behavior, as well as the relationships between these properties and the mineralogy of Silurian mudstones in the Central Taurides of Turkey. Working with different sample-sizes, the experiments consisted of helium pycnometry, low-pressure nitrogen physisorption isotherm, mercury intrusion porosimetry, fluid immersion porosimetry, liquid displacement, fluid droplet wettability and contact angle measurements, and spontaneous imbibition of fluids; four fluids with different hydrophilicity were used to assess the characteristics of fluid-shale interaction and its influence on pore-structure. Results show that studied mudstones can be grouped into three rock types: siliceous, carbonate-dominated, and mixed mudstones. Siliceous and mixed mudstones have higher porosities, pore-throat diameters, surface areas and tortuosities than the carbonate-dominated mudstones, regardless of sample sizes and fluids used. With low permeabilities and medium pore-throat sizes for the siliceous and mixed mudstones, the wettability and imbibition results show that these mudstones are both oil-wet and moderately-to-high water-wet. In contrast, the carbonate-dominated mudstones exhibit oil-wet characteristics. These results indicate that studied siliceous and mixed mudstones in the Central Taurides seem to have appropriate petrophysical properties in the context of reservoir quality.



中文翻译:

土耳其南部陶里德斯中部志留系泥岩的岩石物理特征

本研究使用了一系列综合和互补的实验来检查孔隙结构、流体-页岩润湿特性、样品大小依赖的不同流体孔隙度和渗吸行为,以及这些特性与志留系泥岩矿物学之间的关系。土耳其的中央 Taurides。使用不同的样本量,实验包括氦比重法、低压氮物理吸附等温线、压汞孔隙率法、流体浸没孔隙率法、液体置换、液滴润湿性和接触角测量以及流体的自吸;使用具有不同亲水性的四种流体来评估流体-页岩相互作用的特征及其对孔隙结构的影响。结果表明,研究的泥岩可分为三种岩石类型:硅质、碳酸盐为主和混合泥岩。与碳酸盐为主的泥岩相比,硅质泥岩和混合泥岩具有更高的孔隙度、孔喉直径、表面积和曲折度,无论样品大小和使用的流体如何。硅质泥岩和混合泥岩的渗透率低,孔喉尺寸中等,润湿性和渗吸性结果表明这些泥岩既是油湿性的,又是中高水湿性的。相比之下,以碳酸盐为主的泥岩表现出油湿特征。这些结果表明,在储层质量的背景下,中央 Taurides 研究的硅质和混合泥岩似乎具有适当的岩石物理特性。与碳酸盐为主的泥岩相比,硅质泥岩和混合泥岩具有更高的孔隙度、孔喉直径、表面积和曲折度,无论样品大小和使用的流体如何。硅质泥岩和混合泥岩的渗透率低,孔喉尺寸中等,润湿性和渗吸性结果表明这些泥岩既是油湿性的,又是中高水湿性的。相比之下,以碳酸盐为主的泥岩表现出油湿特征。这些结果表明,在储层质量的背景下,中央 Taurides 研究的硅质和混合泥岩似乎具有适当的岩石物理特性。与碳酸盐为主的泥岩相比,硅质泥岩和混合泥岩具有更高的孔隙度、孔喉直径、表面积和曲折度,无论样品大小和使用的流体如何。硅质泥岩和混合泥岩的渗透率低,孔喉尺寸中等,润湿性和渗吸性结果表明这些泥岩既是油湿性的,又是中高水湿性的。相比之下,以碳酸盐为主的泥岩表现出油湿特征。这些结果表明,在储层质量的背景下,中央 Taurides 研究的硅质和混合泥岩似乎具有适当的岩石物理特性。硅质泥岩和混合泥岩的渗透率低,孔喉尺寸中等,润湿性和渗吸性结果表明这些泥岩既是油湿性的,又是中高水湿性的。相比之下,以碳酸盐为主的泥岩表现出油湿特征。这些结果表明,在储层质量的背景下,中央 Taurides 研究的硅质和混合泥岩似乎具有适当的岩石物理特性。硅质泥岩和混合泥岩的渗透率低,孔喉尺寸中等,润湿性和渗吸性结果表明这些泥岩既是油湿性的,又是中高水湿性的。相比之下,以碳酸盐为主的泥岩表现出油湿特征。这些结果表明,在储层质量的背景下,中央 Taurides 研究的硅质和混合泥岩似乎具有适当的岩石物理特性。

更新日期:2021-08-19
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