Application of Integrated Seismic-geology Prediction Techniques to Weathering Crust Karst Reservoir——An Example from Lower Ordovician, Northern Slope of Tazhong Area

The complexity of carbonate reservoirs formation and the difference of seismic data cause obvious characteristics difference of seismic response in the northern slope zone of Tazhong area. The well-seismic calibration is used to predict the carbonate reservoir response characteristics on the basis of analyzing the main control factors of reservoirs. The distribution rules of different grade karst reservoirs are identified using the spectral decomposition, instantaneous frequency, correlation length, well-seismic calibration inversion technology and the geology-seismic comprehensive technology, and the accuracy of reservoir prediction is improved. It is successfully applied in the study area.