Control of Scaling Tendencies in an Effluent Water Injection Plant in West Kuwait Oil Fields: Laboratory Study

摘要

Scale inhibitors screening and evaluation study was conducted to minimize the possibility of scaling tendencies when effluent water is injected into the reservoir of West Kuwait oil fields. Static autoclave jar test and dynamic scaling rig were used to screen and evaluate six commercially available scale inhibitors. Five different effluent and formation waters were tested using the static jar test and dynamic scaling test rig under reservoir and surface conditions. The results of this scale inhibitor screening and evaluation study were judged upon efficiency to inhibit calcium carbonate (CaCO3) and barium sulphate (BaSO4) scales. The two most effective scale inhibitors to reduce both CaCO3 and BaSO4 scales were selected with optimum dosages. The first effective inhibitor was an aqueous solution of organic phosphate with an optimum dose of 15 ppm to control CaCO3 and 20 ppm to control BaSO4. The second effective inhibitor was a combination of organic amine and organic phosphates with an optimum dose of 20 ppm to control both CaCO3 and BaSO4.