Prediction of Braided River Sedimentary Reservoir in Middle and Shallow Layers of Banqiao Area
The Guantao Formation Reservoir in the middle and shallow layers of Bannan area is characterized by single oil layer and developed bottom water.Accurate characterization of the loca-tion of oil layer and distribution of the upper and lower interlayer of oil layer is the key to effective development.Based on the study of sedimentary reservoir,it is believed that the Guantao Formation in Bannan is a braided river sedimentary system,mainly developing four microfacies:core beach,braided channel,inter channel,and flood plain mud.The reservoir is a high porosity and permea-bility reservoir with strong heterogeneity and relatively stable oil layer distribution.Analysis shows that conventional inversion methods have low resolution and cannot effectively identify single sand bodies;seismic waveform indication inversion has obvious advantages in identifying single sand bodies,which can meet the needs of horizontal well deployment.Based on the reservoir inversion re-sults,the reservoir engineering scheme and actual drilling performance tracking were completed,and good results were achieved,demonstrating the reliability of the reservoir inversion method.
sedimentary reservoir characteristicsseismic waveform indication inversionbraided rivermiddle and shallow layers
万方数据
维普
