PROSPECTS FOR IMPROVING THE EFFICIENCY OF WATER INSULATION WORKS IN GAS WELLS

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 ofgas-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-cutinterval.

Экстрактовые масла Acacia dealbata Link. для элитной парфюмерной продукции

The aim of this survey was to find the best way for the extraction of essential oils from the Acacia dealbata Link. floral raw materials, as well as discover samples of elite perfumery products of various brands that use this aroma in perfumery compositions. Two methods of extraction with a volatile hydrocarbon solvent were used, namely, 1) Soxhlet extraction; 2) extraction of raw materials by the method of triple infusion in a solvent at a low positive temperature (+ 3 °C). To obtain absolute, concrete was extracted in a classical manner. In the first variant, the yield of concrete was 1.46 % of the weight of raw materials; in the second – 1.18 % but its aroma was more delicate. The content of absolute in the samples was 28.4 % and 24.6 % of the concrete mass, respectively. Famous brands using mimosa fragrance are L`Artisan Parfumeur (Mimosa Pour Moi), Jo Malone (Mimosa & Cardamom), Dolce & Gabbana (Velvet Mimosa Bloom), Calvin Klein (Eternity Summer), Kenzo (Summer by Kenzo), etc.