高效旋流气浮一体化预分水除油技术.docx

高效旋流气浮一体化预分水除油技术 胡长朝，党伟，谭文捷，王莉莉，唐志伟 中国石油化工股份有限公司石油勘探开发研究院，北京 100083 摘要 为克服高含水期油田预分水设施的局限性，对旋流、自溶气气浮、二级气浮、斜板聚结等技术进行集成研究，形成一体化预 分水除油技术及装置。该装置取代了常规预分水除油工艺中的预分水器、除油罐、沉降罐等大型设备，具有预分水除油效率高、 工艺流程短、占地面积小、投资低等优点，可用于集输系统的接转站和边缘油田就地预分水和污水处理。室内实验表明，在来液 含水大于 80%、含悬浮物 300 mg/L 条件下，装置可预分出 38%的污水，可将分出污水中的含油、含悬浮物指标分别控制在 15 mg/L、5 mg/L 以内，实现了预分水和除油功能的有机结合，经济效益明显。 关键词 预分水除油一体化；旋流技术；自溶气气浮 中图分类号 X741 文献标志码 A doi 10.3981/j.issn.1000-7857.2014.08.005 Integrated Hydrocyclone and Flotation Separation Technology for Water Preseparation and Wastewater Treatment HU Changchao, DANG Wei, TAN Wenjie, WANG Lili, TANG Zhiwei Petroleum Exploration and Production Research Institute, Sinopec, Beijing 100083, China Abstract In view of the disadvantages of the current water preseparation facilities in a high water- cut oilfield, a high efficient integrated technology of the hydrocyclone, the self- dissolved gas flotation, the second stage flotation and the inclined plate coalescence for the water preseparation and the wastewater treatment is proposed, and the laboratory equipment is developed. With this equipment for the water preseparation and the wastewater treatment, 38% of the wastewater can be preseparated, and the outlet content of oil and suspended solids can be controlled under 15 mg/L and 5 mg/L, respectively, when the inlet water-cut is more than 80% and the concentration of suspended solids is less than 300 mg/L. With its high efficiency, the short process flow, the small size and the low investment, the equipment can be used for the water preseparation and the wastewater treatment at transfer stations of gathering systems and marginal oilfields, to bring about great economic benefits. Keywords integration of water preseparation and oil removal; hydrocyclone technology; self-dissolved gas flotation 国内外油田开发都经历着产油量上升、油量达到高峰稳 产、油井见水产量递减 3 个阶段[1]。中国东部主力油田大部分 已进入高含水或特高含水开采期 ，原 油综合含水已超过 90％，有的油田甚至高达 98%，油田开发已由“采油”变为“采 水”。地面处理系统利用的是中、低含水期的生产设施，不能 适应高含水期产液量