Seismic Prediction of Ultra-Deep Tight Sandstone Reservoir Fractures in HTB Area,Zhungaer Basin
A seismic fracture prediction method is proposed based on the fusion of multiple prestack and poststack sei-simc attributes for predicting the development of tight sandstone reservoir fractures in HTB area in the Zhungaer Basin.The fracutres in the area include both large-scale fracutres that can be identified by seismic responses and small-scale fracutres that can not be readily identified by seismic responses.It is the latter that requires special processing.The geo-metric seismic attributes related to large-scale fractures are firstly extracted by using the poststack seismic data of high signal-to-noise ratio and then combined with the distribution pattern of the fractures in the target layer characterized with multi-attribute fusion to predict the distribution of small fractures through further combination with frequency-dependent anisotropic parameter inversion.At last,the prediction results are summarized to analyze the fracture distribution pattern of the target layer,with a view to accurately depicting potential targets with well-developed fractures.In all,the actual da-ta obtained are consistent with predicted results,showing that fractured reservoirs can be accurately described by using this integrated multi-scale fracture prediction technology.
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