The 3D Seismic Geology Modeling Method Is Applied In The B Areas

The 3D seismic geologic model is mainly established by geophysical exploration data and modern visualization technology, which has the characteristics of high imaging precision, strong space and can reflect the real underground situation. Geological model can greatly reduce the workload in seismic processing and analysis, while the distribution of underground reservoir parameters to be more quantitative and accurate description, so in the field of oil exploration has a wide range of applications.The B area is located in the west of BN oilfield, has excellent reservoir forming conditions and reservoir performance, but its development difficulty is how to find increasingly hidden oil and gas reservoirs, and simply improve the seismic sampling density will cause waste. It is necessary to carry out observation system parameters and geological characteristics of sensitivity analysis, and the establishment of the study area of the three-dimensional geological model, the sensitivity of the theoretical significance of the study.Based on the analysis of the study area and the analysis of earthquakes, logs and geological data, the Kriging interpolation algorithm is used to establish the conventional geological model. That is, through the seismic interpretation of the horizon to do horizontal constraints, geology and logging related data for longitudinal control, interpolation extrapolation to get the geological model. This conventional modeling method has the problem that the model accuracy is not high in the geologic complex area of the study area.On the basis of the conventional geological model, the paper uses the seismic data to reflect the characteristics of the intermediate frequency information of the underground space distribution, constrain the conventional model by seismic data, and fit the generated wave impedance data body into the information needed for the model.Conventional and fitted models are optimized for 3D geological models. The optimization modeling method can reduce the influence of the horizon interpretation error on the modeling, the higher the accuracy of the model after the treatment, and can reflect the complex formation and fine structure changes.The multi-dimensional qualitative and quantitative evaluation of the three-dimensional geological model is carried out, including seismic data matching, logging curve consistency, section identification, attribute plane feature and forward modeling simulation. The optimized geologic model can accurately reflect the underground space distribution and complex structure, which is in accordance with the requirements of the subsequent degradation treatment and interpretation evaluation, and provides theoretical guidance and basis for the study of the sensitivity of the observation system parameters and geological features.