大庆喇嘛甸油田存在基础井网、层系调整、注采调整、二次加密、厚油层聚驱及聚驱上返等多套井网。截至2010年,葡I1-2油层已经全面转入聚驱后水驱。随着油田的开发,油层水淹厚度加大,水淹级别升高,水淹情况越来越复杂。通过分析取心井在不同开发阶段的物性、水洗情况变化,并结合测井曲线变化特征及其水淹解释情况,总结了油层水淹过程中岩性、物性、电性含油性等指标变化规律。在此基础上,总结厚油层的水淹变化规律,确定低中水淹(水洗)分布特征,为葡I1-2油层进一步挖潜奠定基础;分析厚油层水淹的主控因素,为二类油层聚驱开发提供指导。

The Daqing Lamadian oil field has developed by basic well pattern, layer system adjustment pattern, producer injector adjustment pattern, secondary infilled well pattern, thick oil layer polymer flooding pattern, and polymer flooding upward pattern. Up to 2010, the PI1-2 layer has completely shifted to polymer waterflood in Daqing Lamadian oil field. With oil field developing, the oil layer waterflooding thickness and hierarchy increase. The water flooding situation becomes more and more complex. Through the analysis on coring well data change of property, water washing combining well logging curve characteristics and waterflooding explanation in different development stages, the evolution rules of lithologic character, petrophysical property, electrical property, and oil-bearing property are summed up in the process of water flooded reservoir. Based on the above results, thick oil reservoir water flooding regularity is summed up. The distribution of low waterflooding (washing) thickness is determined. It lays the foundation for further discovering potentials of PI1-2 oil layer; the anatomy of waterflooding main controlling factors provides the guidance for polymer flooding development in the sub-main layers.