STUDY OF COMPOSITIONS FOR SELECTIVE WATER ISOLATION IN GAS WELLS

Abstract
Abstract. A hydrophobic composition containing water repellents and highly\r\nvolatile solvents is shown in this study to isolate water from the bottomhole\r\nformation zone of gas wells and reduce as much as possible the saturation of pore\r\nspaces with water. During injection, this composition shows selectivity and mostly\r\npenetrates water-saturated porous media. The study shows that the injection of such\r\ncomposition into porous media has a high water-insulating effect, reducing the\r\nwater permeability of water-saturated porous media by 35 times with a degree of\r\nwater isolation of 97%. Moreover, while injecting, it has selective action, mainly\r\npenetrating water-saturated media rather than gas-saturated media. As a result of\r\ninjecting 0.91 to 0.99 pore volumes (pv) of the composition, the Qwater/Qgas ratio\r\nreaches 5.22 to 5.26, indicating high selectivity.\r\nKeywords: Volatile solvents; Gas wells; Permeability; Water isolation; Porous\r\nmedia

Author
Falah hussein KHALAF

DOI
https://doi.org/10.53656/nat2021-6.04

ISSN
Volume 30 Number 6, 2021

Publish Date: 2021-12-01