Research On Key Technology Of 3D High Density And Wide Azimuth Seismic Data Processing In Marcy 1 Well Area

Mx-1 well high density seismic prospecting of Junggar acquisition is vibroseis slip sweep, this acquisition method is always contaminated by harmonic noise, seriously affecting seismic data signal-to-noise ratio and resolution. This study is based on the characteristics of the harmonic, based on median filter, least square method, a total offset frequency suppression, GeoEast system.Through experiment and exploration, a set of effective method of resonance suppression is formed.The Mx-1 well area of 3D high density, acquisition compared to the previous conventional acquisition techniques, single shot energy is weak, due to the viscoelastic properties of surface and underground medium, seismic wave will have strong absorption, especially the attenuation of the high frequency component, will lead to the decrease of the resolution of seismic record. Through field investigation of Q, the relative accuracy of Q is obtained, and the Q compensation method is developed. The Q factor is compensated by VSP data, and the empirical formula and data spectrum ratio method is used to extract the Q factor.For the wide azimuth of seismic acquisition, the imaging and clear reservoir space distribution of the multi direction and small fault can be obtained. The traditional detection technology of common offset is better than the VTI anisotropic problem. But it is not feasible to analyze and detect the cracks in the CRP gathers. At present, the OVT domain processing technology has the potential to solve these problems. Based on this reason, this system has studied the OVT domain processing technology, and has carried out a range of CRP CRP, which has been used in the OVT domain.