Static correction approaches being frequently applied
Lin Boxiang, Sun Jingmei, Xu Ying and Li Bo. Institute of Geophysical Prospecting, the Research Institute of Petroleum Exploration and Development of SINOPEC, Nanjing 210014, China
The fundamental principles of static correction approaches being frequently applied, including elevation, model, refraction and tomography static corrections, are described and their suitability for complex near-surface conditions is discussed. The tomography static correction based on first breaking time is considered to be one of the most effective methods to deal with the long wavelength statics caused by variation of topography and low velocity zone (LVZ). The residual statics correction calculation based on multiple domains statistics is thought to be a quit good approach for determining the short wavelength statics caused by geometry deviation and LVZ model error, it is suitable for complex near-surface conditions through correct application. The conventional residual statics correction calculation based on reflection energy is of course indispensable in data processing. Time variable residual static correction can also be used if necessary. Real data examples give an explanation on above opinions.