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一、大庆油田土酸酸化发展概况油层酸化是目前国内外各油田普遍采用的增产、增注主要措施之一。大庆油田从六十年代初期开始研究,1963年开始现场试验。矿场实践表明,砂岩油层采用土酸酸化有明显的增产增注效果。大庆油田采用的油层酸化工艺经历了三个发展阶段: 1963—1966年采用7:6土酸(即7％HCI+6％HF及各种添加剂)酸化,酸化后用混气水排酸;1967—1969年用7:6土酸酸化加络合剂,不排酸;1970年起用7:3土酸酸化,不加络合剂不排酸(包括稠油段
First, the development of acid soil acidification in Daqing Oilfield acidification is currently widely used oil fields at home and abroad to increase production, one of the main injection. Daqing Oilfield began its research from the early 1960s and began field tests in 1963. Practice shows that the mine, sandstone acidizing acidification has obvious effects of stimulation. The oil layer acidification process used in Daqing Oilfield has undergone three development stages: Acidification with 7: 6 earthmoving acid (ie 7% HCI + 6% HF and various additives) from 1963 to 1966; - 1969 7: 6 acidizing with complexing agent, not row acid; 1970 7: 3 acidizing with acid, without complexing agent not row acid (including heavy oil section