کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6447080 1641128 2015 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Induced polarization dependence on pore space geometry: Empirical observations and mechanistic predictions
ترجمه فارسی عنوان
وابستگی قطبی شدن به هندسه فضای خالی: مشاهدات تجربی و پیش بینی های مکانیکی
کلمات کلیدی
قطبش منجر شده، پتروشیمی، منطقه سطح، قطبش پذیری خاص،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فیزیک زمین (ژئو فیزیک)
چکیده انگلیسی
We use an extensive database to compare empirical observations and previously proposed empirical models against recently developed mechanistic formulations for the induced polarization (IP) response in porous media as a function of pore space geometry and interfacial chemistry. These comparisons support the argument that the pore-volume normalized internal surface (Spor) is the most important geometric parameter influencing the polarization. The specific polarizability derived from the empirical relationship between imaginary conductivity σ″ and Spor is independent of the porosity. By contrast, equivalent specific polarizability terms in recently proposed mechanistic models are found to be significantly correlated with porosity, and thus do not appear to represent an interfacial chemistry factor independent of the pore space geometry. Furthermore, the database shows no evidence for a significant decrease in the counterion mobility of clayey materials relative to clay-free materials, as postulated in recent studies. On the contrary, a single value of cp is consistent with no significant differences in ionic mobility given that all samples were saturated with a NaCl solution close to a common salinity of about 100 mS/m.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Applied Geophysics - Volume 123, December 2015, Pages 310-315
نویسندگان
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