Mohe Region Seismic Prospecting Data Acquisition And Processing Of Natural Gas Hydrate

Ravines crossbar at mohe region in our country, the surface situation was complex. Seismic geological condition is very complex. Underground is rich in natural gas hydrate, but due to surface static correction problems and the causes of low signal-to-noise ratio data, the influence of seismic data makes the region is limited greatly in solving geological problems. In this paper, we study from the acquisition of seismic data, after a lot of testing to determine the appropriate parameters, through the analysis of the raw data in the processing, adopt reasonable processing technology:First of all, research the current status of the seismic exploration of gas hydrate research, in past at mohe region geologic survey conducted by the work study, distribution of stratum, geological structure, hydrate reservoiring characteristics of a systematic research.Second, the data collection phase, selecting appropriate parameters through multiple sets of test, the forward modeling of geological model is further confirmed the accuracy of the parameters. Observation system is established and the original ChanBao records for slope analysis, determine the types of interference wave.Again, through the refraction static correction in processing and tomographic static correction in solving high frequency correction quantity, adopting indoor residual static correction (multiple iterations) solve the problem of final correction; Using prestack multi-domain denoising technology reasonably, improve data signal-to-noise ratio; Prestack using serial deconvolution, post-stack using zero phase deconvolution increasing data resolution; In velocity analysis, stack and migration stage, finally through many experiments and iterations, the final profile reflects various seismic geologic information is more accurate and reliable. And significantly improves the signal-to-noise ratio of data.Finally, to summarize the data processing work, combined with the test, and then summarizes a set of complete, suitable for permafrost region seismic acquisition and processing method of gas hydrate.