疏松砂岩油藏大孔道定性识别新方法研究

摘要

During water flooding of the unconsolidated sandstone reservoir,water channeling’s appearance has a serious impact on the water flooding effect and recovery extent. Thus,identification of water channeling effectively is a key problem to solve. By analysis,the mainly 7 static factors which impact the formation and development of water channeling were selected,and the mainly 6 dynamic factors which indicate the formation of water channeling were confirmed also. The nine standard degree method and grey correlation method were used to calculate the weight of static factors and dynamic factors,then the new identification model of water channeling was established. The monitor result of tracer indicates the new method is practical and effective.%疏松砂岩油藏在长期注水开发过程中，往往伴随着大孔道的出现，这严重影响了油藏水驱开发效果，制约了采出程度的进一步提高，因此，大孔道识别及有效封堵成为该类油藏急需解决的关键问题。通过研究分析，确定了影响大孔道从形成到发展的7种主要静态因素，以及标志大孔道形成的6种主要动态因素。将层次分析法及灰色关联法相结合，分别计算静态及动态因素的权重，建立了全新的大孔道定性识别模型。示踪剂监测结果验证了该方法的实用性和有效性。