泡沫复合驱污水配注聚合物溶液粘度损失原因及对策  

Analysis and treatments of factors for viscosity loss of polymer solution with sewage in foam flooding

作　　者：袁斌[1] 韩霞[2] 

机构地区：[1]中国石化西北油田分公司,新疆乌鲁木齐830000 [2]中国石化胜利油田胜利勘察设计研究院有限公司,山东东营257026

出　　处：《油气地质与采收率》2013年第2期83-86,116-117,共4页Petroleum Geology and Recovery Efficiency

基　　金：中国石化胜利油田分公司河口采油厂和采油工艺研究院的支持

摘　　要：为了确定泡沫复合驱污水配注聚合物溶液粘度损失严重的主要原因,寻找保持粘度稳定的有效措施,分析了金属阳离子、溶解氧、硫化物、化学需氧量、硫酸盐还原菌和泡沫剂及破乳剂对聚合物溶液粘度损失的影响程度,确定了污水中的还原性物质是导致聚合物溶液粘度损失的主要因素。在此基础上,研究了埕东油田泡沫复合驱污水配注聚合物溶液粘度的稳定方法,提出了适宜高效的曝气生物氧化工艺技术。利用曝气氧化方法,将通过硫化细菌和硝酸盐还原菌这2类菌株联合生化处理的污水用于配制聚合物溶液,可使聚合物溶液的粘度达到35mPa·s并趋于稳定。The effects of various factors on viscosity loss of polymer solution are investigated to highlight the main issue of serious loss for viscosity during foam flooding as well as to find the effective preserving measurements. The results showed that the reducing substances in the wastewater such as sulfides, Fe2+, SRB, and COD are the main reasons affecting the viscosity loss of polymer solution. On this basis, one kind of preserving method for viscosity loss of polymer solution in Chengdong foam flooding is pointed out by aerobic biological oxidation. The viscosity of polymer solution prepared with the wastewater which is aerobically treated by sulfur-oxidizing bacteria SOB and denitrifying bacteria DNB can reach more than 30 mPa·s.

关 键 词：泡沫复合驱 还原性物质粘度损失 粘度稳定 曝气生物氧化 

分 类 号：TE357.42[石油与天然气工程—油气田开发工程]