부산대학교 도서관

During 1981, about two-thirds of the low-tension slug was injected. By year-end, the oil cut had increased from 0.6 to over 2%. Injection rates were less than predicted. The viscosity of the slug was reduced from 20 to 14 cp. Following the viscosity reduction, the injection rate continued to decline from 65,000 to 50,000 barrels per month by year-end. An oil response has apparently occurred from the low-tension slug injection, with tracer appearance in only Well 88. The plant operation is now satisfactory. By year-end, the filter operation was satisfactory. The blending system produced satisfactory concentrations throughout the year. Laboratory support work is being done on field treatments of sulfonate-containing crude. A family of chemicals has been developed for a two-stage field treating operation; the first stage for demulsification and the second stage for extraction of the sulfonate from the crude oil. All of the sulfonate has been manufactured and quality control tests were run on each batch. While differences between batches could not be discerned by chemical analysis, the amount of alcohol required for phase stability at constant temperature differed between batches. It was found that if the required isobutyl alcohol (IBA) for phase stability was added, the oil recovery was about the same for each batch. 90 figures, 20 tables.