کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5484141 1522785 2017 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental study of water blocking damage on coal
ترجمه فارسی عنوان
بررسی تجربی از آلودگی آب بر روی زغال سنگ
کلمات کلیدی
مخازن زغال سنگ، آلودگی آب سورفاکتانت، فشار مویرگی، اثر جین،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی اقتصادی
چکیده انگلیسی
Water blocking damage, caused by the invasion of external fluids into the coal seams during hydraulic fracturing, is one of the reasons causing coalbed methane wells uneconomic in most areas of China. This paper presents an experimental study of water blocking damage on coal based on the measurements of surface tension, contact angle, gas-phase permeabilities and adsorption and desorption of nitrogen on synthetic coal samples. Distilled water, KCl, AN, and KCl+AN solutions were used as testing liquids in this study. Results show that the hydraulic fracturing fluid with surfactant AN causes the lowest damage to the reservoir permeability; the surfactant AN reduces the surface tension of the liquid and increases the wettability of liquid to coal reservoir; and the surfactant AN inhibits the occurrence of capillary and Jamin effects efficiently. It is concluded that the surfactant AN can reduce the water blocking damage rates of coal reservoirs; and the hydraulic fracturing fluid mixed with 1.5% KCl and 0.05% AN reduces the effect of water blocking damage on the coal permeability.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Petroleum Science and Engineering - Volume 156, July 2017, Pages 654-661
نویسندگان
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