回注聚合物驱产出水的油层污染机理  

Analysis of contaminants in water produced from formation with polymer flooding and the mechanism of their damage to formation

作　　者：刘晓冬[1] 吕靖[1] 于舒杰[1] 王艳丽[2] 

机构地区：[1]大庆石油学院石油勘探系,黑龙江安达151400 [2]大庆油田有限责任公司钻井二公司,黑龙江安达163000

出　　处：《大庆石油学院学报》2001年第4期8-10,共3页Journal of Daqing Petroleum Institute

摘　　要：系统分析了大庆南三区东部聚合物驱产出水处理前后各组分的含量及分布 ;根据油层损害机理及该区油层的孔渗特征 ,研究和确定了污染物质和污染机理 ;认为聚合物驱产出水中硫酸盐还原菌是主要污染物质 ,向萨尔图、葡萄花油层的低、中渗层及高台子油层回注时 ,固体悬浮物和原油也是主要污染物质 ,而聚合物仅对低渗层造成损害 ;固体颗粒在孔喉中形成“桥塞” ,为油珠进一步堵塞孔喉提供了条件 ,渗透率的降低远比只含有固相颗粒或油珠的流体严重 ;硫酸盐还原菌因大量繁殖聚积而产生沉淀 ;The contents of oil, polymers, solid particles, inorganic ions and bacteria in water with or without pretreatment were analyzed respectively by means of various chemical and physical methods, which was produced from formation with PAM flooding in Nanshan Area, Daqing oilfield. The diameters and their distribution of solids were also measured by laser granularity equipment. According to the chemical and physical properties of these materials and their damage mechanism to oil formation, the damage contents were determined. The sulphate\|deoxidized bacteria are main damage contents for the rejecting of water into formation. Solid particles and oil can damage formation with medium or low permeability, and PAM can damage formation low permeability. The usual pretreatment of water can remove oil effectively, but have little effects for removing PAM and particles. The permeability of the formation becomes lower because of the particles accumulating around thorats in rocks. The asorption of polymers in formation can clog the thorats in rocks with permeabilities.

关 键 词：聚合物驱油 油层 产出水 回注 污染物质 污染机理 油层污染 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程] TE258.1