Research Of Unified Velocity Fusion On Field Construction Method And Application

Nowadays,there are more and more ways to acquire seismic data,and there are various differences in the types and precisions of the data obtained,which have an impact on the later processing and interpretation.For large-area areas composed of multiple work areas,there must be different velocity data from multiple work areas.Different work areas often have a certain range of overlapping areas.How to effectively use these scattered velocity data to establish a uniform velocity of the whole area The field has become a very important research content in actual production.Under the premise that the quality of the data is guaranteed,the influence and function of each effective velocity information in the construction of the velocity field can be fully considered to more accurately reflect the real situation of the velocity field in the underground background.This is crucial for subsequent processing and interpretation.Therefore,it is of great practical value to carry out the unified construction and management of the seismic velocity data obtained,which can provide important basic data for subsequent contiguous processing and seismic interpretation.The research of this thesis aims to develop a set of functions including Kriging interpolation technology,different periods and types of velocity data and three-dimensional visualization based on the Qt development environment by the research of the unified velocity field interaction management platform construction and velocity fusion strategy.The unified velocity field in the interaction management platform software system is used in the actual data to form a unified geophysical velocity model,which is convenient for unified velocity comparison analysis and imaging.Through a large amount of research,a horizontal and vertical velocity fusion strategy and a unified velocity field interactive management platform were established,and a unified velocity interactive management platform software integrating velocity file management,vertical and horizontal velocity fusion unified construction and velocity 3D visualization was developed.The system improves the accuracy and efficiency of the velocity uniform construction,further improves the imaging quality of the offset processing,and verifies the validity and applicability of the research results in the velocity fusion and imaging applications of thousands of square kilometers of actual data,and verifies the effectiveness of the research methods and software modules developed.