改善二类油层聚合物驱开发效果的途径

通过对已开展的二类油层注聚试验区和工业化区块的动态反映特征分析，指出二类油层在聚驱开发过程中存在着注入能力差、产液能力低、见效含水低值期短、聚驱平面矛盾突出等问题。从实践的角度总结了改善二类油层聚合物驱开发效果的主要途径。二类油层聚合物驱通过严格控制注聚对象，可以减少层间差异；通过采取细分层系、缩小井距、完善注采系统以及优化注聚方案等技术措施，可以取得较好的开发效果。

Methods to Improve Development Results of Polymer Flooding in Class II Reservoirs

Based on the analysis of dynamic characteristics in field tests area and commercialized production areas for polymer injection in class II reservoirs, some problems about polymer flooding in class II reservoirs can be found, such as low injectivity, low liquids productivity, short period with low water cut and serious planar conflicts. The main methods to improve the development results of polymer flooding have been generalized based on practice. The polymer injection objects should be strictly controlled to decrease difference between layers during polymer flooding in class II reservoirs; Focusing on improving the control efficiency of polymer flooding, some measure, including further division of strata of layers, shortening well distance, improvement of injection-production system and optimization of polymer flooding program, have taken, and then better development results for polymer flooding in class II reservoirs can be obtained.