کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1757743 1523017 2015 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A new formulation of apparent permeability for gas transport in shale
ترجمه فارسی عنوان
فرمول جدید نفوذ پذیری ظاهری برای انتقال گاز در شیل
کلمات کلیدی
گاز شیل، نفوذپذیری ظاهری، انتشار سطح، مدلسازی حمل و نقل گاز
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم زمین و سیاره ای (عمومی)
چکیده انگلیسی
Recently, a few apparent permeability formulations have been proposed for gas transport in tight formations aiming of correcting flow deviation caused by slip flow and Knudsen diffusion. However, the effect of surface diffusion has always been neglected. Surface diffusion happens when gas molecules adsorb on the solid surface. Considering significant proportion of adsorbed gas (20%-80%) in shale, surface diffusion could play an important role during gas transport. In this paper, we presented a new apparent permeability formulation, which takes surface diffusion into account, for gas transport in shale. The parametric study of the presented formulation shows apparent permeability is sensitive to pressure, temperature, pore radius and surface roughness. The permeability caused by surface diffusion can be several times larger than shale intrinsic permeability at low pressure. Neglecting surface diffusion in the formulation would underestimate gas flux by 25%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Natural Gas Science and Engineering - Volume 23, March 2015, Pages 221-226
نویسندگان
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