کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6630930 | 1424938 | 2018 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of gas hydrate formation and decomposition on flow properties of fine-grained quartz sand sediments using X-ray CT based pore network model simulation
ترجمه فارسی عنوان
اثر تشکیل و تجزیه هیدرات گاز بر خواص جریانات رسوبات شن و ماسه کوارتز ریز دانه با استفاده از شبیه سازی شبکهای مدل توخالی بر پایه اشعه ایکس
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
Experiments are performed to study the closed-loop effect of gas hydrate formation and decomposition on the flow properties of a fine-grained quartz sand specimen. The high resolution X-ray CT images of the test specimen at different experimental stages are acquired. In order to elucidate the changes in pore structure of the test specimen, topologically representative pore networks are established. The evolution of the flow properties during gas hydrate formation and decomposition is further evaluated. The results show that, gas hydrates occupancy in pore space exhibit different modes; they grow mainly as the grain-cementing mode except some intermediate stages, where pore-filling or load-bearing hydrates are observed. It is also found that the formation and decomposition of gas hydrates can cause the pore structure and flow properties changed. Increase of gas hydrate saturation results in a sharp decline in water relative permeability, larger irreducible water saturation and smaller gas-water percolation zone, while gas relative permeability does not exhibit obvious changing law. The decomposition of gas hydrates will exert a greater influence on the flow properties described above than gas hydrate formation does. The increase in frequency percentage of 10-20â¯Î¼m pores within the fine-grained test specimen after experiments might be caused by gas hydrate decomposition induced damage of pore structure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 226, 15 August 2018, Pages 516-526
Journal: Fuel - Volume 226, 15 August 2018, Pages 516-526
نویسندگان
Daigang Wang, Chenchen Wang, Chengfeng Li, Changling Liu, Hailong Lu, Nengyou Wu, Gaowei Hu, Lele Liu, Qingguo Meng,