Research And Application Of Multi-component Interpretation Technology

Contraposing the question of jointed interpret in multiwave seismic data, it has been researched that the poststack parameter inversion, horizon calibration and multiparameter joint interpret of multiwave, in order to extract geologic achievement from multiwave data and impulse the multiwave seismic exploration. The detail research contents are as follows:1) It has been researched that the P and PS wave poststack impedance inversion methods and the application of it. The postsatck impedance inversion methods based on model has been extended to S-S wave impedance inversion, then coefficient of reflection of P-S wave be conversed to coefficient of reflection of SoS wave approximately, there for the inversion of S wave impedance through P-S wave data by impedance inversion method of P wave is done. The parameter such as Vp/Vs ratio, Poisson ratio,λp/μp and so on can be gained.2) The methods and applications of horizon calibration ofmultiwave section has been researched. As the sonic and density log got and the S wave velocity got through the conversion, the calibration of P-P and P-SV section has been done through composing the P-P and P-SV wave seismic record by coefficient of reflection's formula of P-P and PoSV wave, in result it can been done that making sure the geologic horizon of refract wave on section, and calibrating the horizon relation of P and S wave section, this is a foundation for geologic interpret later.3) Colligate interpret research of multiwave data in guangan has been accomplished. Using the impedance of P and S wave, V_p/V_s ratio, Poisson ratio,λp,μp and the crossplot of its that may have response to the gas, the rang of reservoir has been judged and the detail of it has been described.A poststack parameter inversion of multiwave has been found in this research, the horizon of multiwave has been calibrated and the research of multi-parameter joint interpret of multiwave has been accomplished. The reservoir's detail has been analyzed close to the log guangan 2 through multiwave seismic attributes that has been extracted, the gas reservoir and mud rock that can hardly be separated only using P wave data has been distinguished, the question that the result of reservoir forecast only using P wave data is no only one has been conquered, the accuracy of the reservoir forecast has been improved very well.