Fine shear-wave (S-wave) impedance access technology based on logging and prestack channel set seismic data
A technology of shear wave impedance and prestack gathers, which is used in seismology and seismic signal processing for logging records. It can solve the problems of lack of shear wave impedance data, harsh application conditions, and difficulty in parameter selection. , strong adaptability, strong anti-noise effect
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[0019] Based on the technique of obtaining precise shear wave impedance based on well logging and prestack gather seismic data, the shear wave information at the well control position plays an important role in lithology identification and identification of oil, gas and water reservoirs. It is also a popular pre-stack elasticity in the world. Priori information for impedance inversion. The accuracy of the shear wave information at the well control position directly affects the accuracy of the lithologic reservoir description results. Firstly, the petrophysical model and conventional logging data are used to establish the initial shear wave impedance, and then the pre-stack seismic gathers are used for fine adjustment, which not only reduces the error caused by the difficulty of using the shear wave information estimated by the petrophysical theory for parameter selection, but also It also overcomes the large deviation caused by the low signal-to-noise ratio of purely using pre-...
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