Study of Compositions for Selective Water Isolation in Gas Wells
Study of Compositions for Selective Water Isolation in Gas Wells
Author(s): Sudad Al-Obaidi, Miel Hofmann, V. Smirnov, F. Khalaf, H. AlwanSubject(s): Social Sciences, Education, Vocational Education, Adult Education, Higher Education , State/Government and Education, Sociology of Education, Distance learning / e-learning
Published by: Национално издателство за образование и наука „Аз-буки“
Keywords: Volatile solvents; Gas wells; Permeability; Water isolation; Porous media
Summary/Abstract: A hydrophobic composition containing water repellents and highly volatile solvents is shown in this tudy to isolate water from the bottom hole formation zone of gas wells and reduce as much as possible the saturation of pore spaces with water. During injection, this composition shows selectivity and mostly penetrates water-saturated porous media. The study shows that the injection of such composition into porous media has a high water-insulating effect, reducing the water permeability of water-saturated porous media by 35 times with a degree of water isolation of 97%. Moreover, while injecting, it has selective action, mainly penetrating water-saturated media rather than gas-saturated media. As a result of injecting 0.91 to 0.99 pore volumes (pv) of the composition, the Qwater/Qgas ratio reaches 5.22 to 5.26, indicating high selectivity.
Journal: Обучение по природни науки и върхови технологии
- Issue Year: 30/2021
- Issue No: 6
- Page Range: 551-565
- Page Count: 15
- Language: English
- Content File-PDF