The Method Of Converted-Wave Static Correction

Static correction is one of the difficult problems of seismic data processing. Converted-wave static correction is now a hot issue both at home and abroad. Converted-wave static correction is composed of the P-wave static correction of the focal points and S-wave static correction of the reception point. Static correction can be broken down into low-frequency and high-frequency components. Low-frequency components of the static correction is called long-wavelength static correction, the static correction of the high-frequency components, known as short-wavelength static correction. Usually, short-wavelength of the static correction is relative in terms of the length of field observation with the generally greater than or close to the wavelength with a length of the delay changes as static correction of long-wavelength, and the wavelength of less than a length with delay change as the static correction of short wavelength. Short-static correction by the weight of surface changes and the local media measurement errors caused by. In a random distribution within the order, it will cause reflection of the wave axis with the dislocation, stacking the focus can not be very good imaging, the impact of seismic signal to noise ratio; Static correction long wavelength component mainly by the near-surface in the larger context of medium speed or thickness caused by the change will cause false seismic profiles on the structure, leading to erroneous conclusions explained. of course, the long-wavelength and short-wavelength static correction of the division should be relative. In fact smaller than the earthquake at length with the medium wavelength of static correction of the changes, sometimes with both the earthquake affected the focus of the axis and leading with a certain width of the shaft the ups and downs, a false structure.In this paper, first of all, contrast with conventional P-wave, on the converted-wave seismic data processing in the P-wave is different from dealing with some of the key steps, and then research the seven-conventional approach: converted wave refraction static correction methods, and optimize the point of receiving Road coherent superposition law, step-by-step elimination of static correction,Ï„-P transformation, inter-related, when converted-wave delay, a sleek, respectively study, analysis of their respective applicability and limitations, and above the actual data processing results were analyzed.This paper studied the 3-D three component seismic data in XinChang area. Information in resolving the converted wave static correction, in accordance with the wave downlink and uplink longitudinal wave is the wave characteristics of the S-wave, converted wave shot of a static correction longitudinal wave correction on the following five ways to strike a detection point S-wave correction: Scan coefficient converted-wave static correction, surface model based on the converted wave static correction method, based on the time structure of the converted wave control static correction method, based on the converted of wave- wave static correction method based on the long wave length, short wavelength conversion static correction wave of static correction method, and ultimately a better solution to the converted wave of static correction problems, and enhance the quality of the profile, and the combine of their own experience of the actual work of the recommendations made good results...