کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8128271 | 1522991 | 2018 | 33 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Experimental study and isotherm models of water vapor adsorption in shale rocks
ترجمه فارسی عنوان
مطالعه تجربی و مدل های ایزوترم جذب بخار آب در سنگ های شیل
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کلمات کلیدی
جذب آب، سنگهای شیل، مدل های ایزوترم جذب تک لایه چند لایه، تراکم قلیایی، احتباس آب،
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علوم زمین و سیاره ای (عمومی)
چکیده انگلیسی
The understanding of water vapor adsorption and equilibrium in the low permeability matrix of gas shale is crucial for predicting and optimizing gas productivity in shale gas reservoirs. In this study, water vapor adsorption isotherms for gas shale samples from the Lower Silurian Longmaxi Formation in Southern China were measured gravimetrically at two temperatures (30â¯Â°C and 50â¯Â°C) under the relative humidity ranging from 11.1% to 97.0%, and four different isotherm models were used to fit the experimental data and to analyze water vapor adsorption on shale rocks. The experimental results showed that water vapor adsorption for shale rocks followed a typeâ
¡sigmoid shape over the humidity range. At the lower humidity range, the monolayer-multilayer adsorption was the dominant process while capillary condensation and temperature effects became significant with relative humidity increasing. As the amount of total organic carbon increases, water adsorption weakens while calcite has an inhibitory effect. Through quantifying the average relative error (ARE), coefficient of determination (R2) and chi-square (Ï2) of the isotherm models relative to data, the GAB isotherm model was identified to be the best-fitting isotherm to describe the water adsorption process in shale rocks. Moreover, the FHH plot was used to analyze and distinguish the states of water retention by adsorption and capillary condensation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Natural Gas Science and Engineering - Volume 52, April 2018, Pages 484-491
Journal: Journal of Natural Gas Science and Engineering - Volume 52, April 2018, Pages 484-491
نویسندگان
Weijun Shen, Xizhe Li, Xiaobing Lu, Wei Guo, Shangwen Zhou, Yujin Wan,