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聚合物降解是油井出聚的内在原因。聚合物降解主要由物理因素(热、光、剪切等)和化学因素(水解、氧化、微生物酶解等)造成的。注聚区地层存在高渗透带,大孔道、开发井网及生产参数不适合,是油井出聚的外因。控制油井出聚浓度,防止油井窜聚,对提高聚合物驱油效率有重要意义。提高聚合物溶液的粘度并使其粘度值在地层条件下,保持相对稳定,在注聚开发方案编制时注重对段塞的保护,在段塞不稳定区域实施油井堵聚水井调剖相结合的工艺是控制油井出聚的有效措施。
Polymer degradation is the intrinsic cause of well conglomeration. Polymer degradation mainly by the physical factors (heat, light, shear, etc.) and chemical factors (hydrolysis, oxidation, microbial hydrolysis, etc.) caused. There are high permeable zones in the injection zone, large channels, development of well pattern and production parameters are not suitable, is the external cause of the well conglomeration. It is important to improve the polymer flooding efficiency by controlling the concentration of oil in the well and preventing the well from gathering and gathering. Improve the viscosity of the polymer solution and make its viscosity value remain relatively stable under formation conditions, pay attention to the protection of the slug during the process of injection-polymerization development, and implement the combination of oil well plugging well profile control in the unstable slug area Process is an effective measure to control the well to gather.