Geographic Information System Application In The Establishment Of The Surface Structure Model

In petroleum geophysical exploration process,each process affected by many factors such as objective and subjective,the data mainly includes image data(Including remote sensing maps,topographic maps,etc.),vector data(including location data,geological survey data,measurement data,etc.),attribute data(including all kinds of spatial data of the earth's surface and underground within 200 m of lithologic data such as surface information).But the above types of seismic exploration data,the data quantity is big,it is not convenient for management,reduce the efficiency of data.Oil geophysical exploration construction is restricted by various factors such as topography,geology,and based on the underground geological target to complete the construction design,due to complex surface conditions in the site construction and the influence of low velocity zone structure,often need to by changing the shot point and acceptance point coordinates,to the scene to change view design;And the situation of the variable view design as the surface complexity increases,reduces the construction efficiency,and also has a great influence on the quality of acquisition.In addition,the surface structure survey collected data often adopt different interpretation software,the explanation method is single,explain the results need artificial analysis and comparison of the technical personnel,so often can appear different software,data interpretation results of different situations.This paper is the use of geographic information system technology,combining with the current surface structure modeling technology,designed and developed a set of modeling and surface structure of the integration of geographic information system,construction of geophysical prospecting for oil in surface structure model provides a fast and effective method.Through the system finally realizes the basis of geophysical prospecting data warehousing storage,management and sharing,realize 3D visualization of near-surface model,implementation based on the near-surface model point-by-point excitation well depth design method,improve the accuracy of excitation well depth design,improve the efficiency of oil geophysical exploration construction.