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.
出处
《大庆石油学院学报》
CAS
北大核心
2001年第4期8-10,共3页
Journal of Daqing Petroleum Institute
