Multi-wave Multi-component Seismic Data Processing Technology Study In Lamadian Oil Field Of Northern Part Of Daqing Placanticline

Along with the more deep degree in oil & gas exploration, the complex oil & gas reservoir, lithology and concealment and so on, become the key exploration goal. To the traditional P wave exploration, the multi-wave seismic exploration technology, based on P wave and converted wave ,can enhance the image accuracy for complex geological body, then carries on the complex trap description effectively and the drilling target identification.About 100km2 3D3C seismic data in Lamadian oil field,the main development part of DaQing, was gathered in 2007,so that carries on precise description of oil & gas reservoir, identification of residual oil and tapping potentialities effectively .The imaging technical of 3D converted wave is one of the seismic exploration which is difficult to study and also is urgent to solve. This article aims at the special seismic geologic condition of the Changyuan oil field, p-wave high resolution processing to digit geophone and the converted wave processing technology was studied, a set of 3D3C seismic data processing technology and the flow to suit in the thin reservoir Songliao Basin were formed.According to the seismic feature of research area, this article carried technology research mainly on the pre-stack noise suppression for the converted wave, the static correction, the anisotropy analysis, the compensation and pre-stack time migration of the converted wave. To get the achievement is as follow:Through the noise analysis of oil field area and the technology research of six sub-law noise suppression processes, converted-wave the signals were protected ,meanwhile various types of noise caused by oil field facilities were also removed effectively. Through the analysis for Converted-wave pre-stack and post-stack azimuthal anisotropy and the development of compensation techniques, impact and enhance the converted wave data resolution and imaging accuracy.The techniques of restraint combined static correction of converted-wave model were proposed, combine with the lower frequency components of model statics by tiny-well logs and higher frequency components of coherence methods based on the CRP gathers to accomplish statics of converted wave.The result indicated that this method was very effective in solving the rough problem of converted wave static correction, eliminated the false structure caused by the static correction, obtained the good seismic profile of converted wave.High-density anisotropic velocity analysis method and the processing of 3D converted-wave pre-stack time migration was developed, which avoid contradiction of CCP gathers extraction and solve the problem of converted wave structure imaging.It will act as direction and reference function to the next multi-wave processing, it will establishes strong foundation for follow-up multi-wave exploration, and it will be wide application in Daqing Oil Field.