The Multi-wave Pre-stack AVA Joint Inversion Based On The Broad-band Constrained Method

Multi-wave pre-stack inversion is based on the abundant multi-wave amplitude information and can provide ample parameter information which can intuitively describe lithology and physical properties, which has played an important role in the reservoir lithology prediction and identification and has a wide application prospect in the oil-gas exploration.After the reference of many related documents which studies on the development of the multi-wave seismic exploration technology both at home and abroad. The research of this thesis has been divided into the following aspects:1) VTI medium AVA analysis. First, analyze the relationship between the seismic wave’s anti, transmission amplitude and angle of incidence. In order to facilitate the research, combined with the actual strait characteristics, this paper will establish uniform transverse isotropic model. This paper will do AVA forward analysis on based on VTI medium and prepare for the inversion.2) Parameter inversion accuracy is a very important link of the inversion process, because the prestack parameter inversion results will depend on the direct effects of seismic profile. Many factors influence the inversion results, such as the selection and calculation, the original quality of seismic data inversion algorithm and the number of times the component selection. This paper will analyze these factors, the specific method of comparative analysis of various factors of accuracy, is to choose a most suitable combination of prestack AVA inversion, in order to get the most likely to be applied in practical seismic processing and interpretation methods.3) According to the previous work done after, after being played during the AVA analysis, how to establish a good question you want to be the equation of the inversion, and choose a good algorithm for solving equations, etc., on the theory of single-component and multi-media components of the stack AVA inversion before Then the accuracy of the inversion results analysis, and finally to the inversion method has the advantage of doing some actual data retrieval4) According to the previous work done after, after being played during the AVA analysis, how to establish a good question you want to be the equation of the inversion, and choose a good algorithm for solving equations, etc., on the theory of single-component and multi-media components of the stack AVA inversion before. Then the accuracy of the inversion results analysis, and finally to the inversion method has the advantage of doing some actual data retrieval.