冲洗液在聚合物驱油田固井中的应用研究

聚合物驱油田调整井固井时,注入地层中的聚合物及地层流体混合物浸入水泥浆后,使水泥浆增稠、流动性降低,从而降低固井顶替效率,最终影响固井质量。根据河南油田聚合物驱特点,选用自制悬浮剂,研制出CX-W21L冲洗液。该冲洗液体系悬浮稳定性好、冲洗效率高、相容性良好。更加适用于河南油田聚驱调整井固井,提高了注聚合物驱油田的固井质量,解决了河南油田的固井难题。

油田开发目标管理系统设计

为了科学地管理油田，更好地评价油田总体开发效果，大庆油田经过近几年的开发实践，建立了不同油藏类型、不同驱动方式油田的开发指标和管理指标体系。采用层次分析法，建立了多目标、多层次的开发目标评价体系，形成了一套完善的开发目标管理系统，在实际应用中取得了良好效果，为油田的可持续发展提供了科学的决策依据。

Geochemical characteristics of reservoir after water and polymer flooding in Xingshugang oilfield of Daqing

Collecting 44 oil-sand specimens of Pu-I Member in two inspection wells before and after polymer flooding in the thirteenth district of Xingshugang oilfield,with experimental analysis,the author obtained the data about oil viscosity,flow,oil saturation and oil displacement efficiency.The result shows that viscous oil predominates in the main remaining oil in Xingshugang oilfield after water flooding with a certain amount of low viscosity oil,high viscosity oil and heavy oil;after polymer flooding,the viscous oil is main ingredient.Compared with water flooding,the low mobility and poor oil can be spread by polymer flooding,expanding the affected area and improving sweep efficiency and oil recovery.The geochemical affecting factors of water flooding and oil displacement efficiency refer to reservoir flow,permeability and the viscosity of residual oil.In the reservoir with permeability from low to high,the polymer flooding efficiency is better than water flooding.It provides the basis for improving the water and polymer flooding efficiency of the Xingshugang oilfield.