Journal de géologie et géophysique
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Prospects for Improving the Efficiency of Water Insulation Works in Gas Wells

Sudad H AL Obaidi and Falah H Khalaf

In the oil industry, the inflow of water into the gas and oil wells represents always an important issue that needs to deal with. In this study a water-repellent composition, which is based on volatile hydrocarbon solvent, was proposed for handling of water isolating work in gas wells. As a volatile hydrocarbon solvent, it was quite promising to use gas condensate and its primary processing products (like stable gas condensate SC and light distillate of gas condensate DGCL). Initially, we studied the effect of compositions based on the ABR water repellent, M100 fuel oil and solvents SC, DGCL and mixed in equal volumes of DGCL + SC on gas permeability of gas-saturated porous medium. The article presents the results of studies, conducted on physical models of the formation, confirming the efficiency and selectivity of the water-repellent composition impact on the water-cut interval.