Study and Application of Well-Seismic Combined Sedimentary Microfacies Prediction Method

摘要

By far domestic onshore oilfields are mostly in the late stage of development,with the character of high well density and remaining oil dispersed,thus,fine prediction and description of inter-well reservoir heterogeneity and their connection relation at present is the primary task.The well-seismic integration reservoir prediction method based on the sedimentary microfacies,short can create the sedimentary microfacies model that can reflect inter-well change.The principle of method and its implementation process are as followed:By determining the single-well microfacies,creating the statistics relation between the well sedimentary microfacies and seismic impedance;integrating the sequential indicator simulation sequential Guassian simulation by the well microfacies guidance,simulation calculating by the inter-well seismic forward constraint simulation,outputting the sedimentary microfacies results.FSC methods were applied in the SL block of Song Liao Basin,verified by reserved wells;the precision of channel identification is over 86%.A cross-well and about 1000 m narrow river channel is identified on the Kl-1 sedimentary facies plan,this is the first time showed in the public reports domestic and abroad,and the value of application of this method is fully demonstrated.Methods can offer the reference for the reservoir prediction methods in every oil field.