کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6637012 461137 2014 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of CO2 injection on heterogeneously permeable coalbed reservoirs
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Effect of CO2 injection on heterogeneously permeable coalbed reservoirs
چکیده انگلیسی
Further, a reservoir with initial permeability heterogeneity was considered to explore the effect of CO2 injection on the evolution of permeability heterogeneity - whether heterogeneity increases or decreases. The evolution of permeability heterogeneity is investigated for the same two CO2 injection scenarios. For the specific parameters selected, the model results demonstrate that: (1) The injection of CO2 in coalbed reservoirs increases the production nearly 10-fold. (2) At higher injection pressures the recovery is rapid and the production increases dramatically - the production increases 2-fold on increasing the CO2 injection pressure from 4 MPa to 8 MPa. (3) However, CO2 breakthrough occurs earlier at higher injection pressures. (4) The permeability heterogeneity in the reservoir is reduced after a threshold time (∼500 days) although the overall heterogeneity is increased relative to the initial condition and is overall increased for both non-CO2 and CO2 injection scenarios. This indicates that the homogenizing influence of CO2-sorption-swelling is outpaced by CH4-desorption-shrinkage and effective stress influences. This leaves the reservoir open to short-circuiting and earlier breakthrough of CO2 rather than having this effect damped-out by the homogenizing influence of swelling. (5) The cumulative volume of CO2 produced and stored in the reservoir is proportional to the injection pressure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 135, 1 November 2014, Pages 509-521
نویسندگان
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