PROCESS OF TEMPORARY ISOLATION OF ABSORBING SEAMS Russian patent published in 2001 - IPC

FIELD: oil and gas production. SUBSTANCE: process of temporary isolation of absorbing seams is employed in overhauls of wells. Process includes supply of granulated filling agent into well by way of usage of liquid-carrier. Emulsion intended for extinction of wells is utilized as liquid-carrier. It is prepared in gear with wear-resistant checkers placed in opposition by guiding jets through these checkers with flow rate 10-15 l/s with velocity 150-230 m/s and by mixing hydrocarbon fluid, emulsifying agent, calcium chloride, chemically precipitated chalk, potassium bichromate and water. Chemically active dolomite crushed rock with size of following fractions three times smaller than previous ones is used in the capacity of granulated filling agent. EFFECT: increased efficiency of isolation of wells by plugging perforation holes under conditions of abnormally low seam pressure with intention of subsequent development of wells and reduced usage of chemical reagents. 2 dwg, 2 tbl