Three-dimensional modeling method of eruptive volcanic rock geological bodies based on computer graphics

Abstract

The invention discloses an eruption-facies volcanic rock geological body three dimensional modeling method based on computer graphics. The eruption-facies volcanic rock geological body three dimensional modeling method based on computer graphics includes the steps: selecting a seismic achievement profile and a seismic attribute slice; carving the front views respectively corresponding to the top interface form and the bottom interface form of an eruption-facies volcanic body; determining the function relation between the elevation of the top and bottom interfaces of the volcanic body and horizontal distribution of the volcanic body space; carving a top view corresponding to the form of the eruption-facies volcanic body; performing two dimensional linear interpolate value; determining the corresponding relation between the space distribution range of the volcanic body and the horizontal coordinates; determining the function corresponding relation between the elevation of the top and bottom interfaces of the volcanic body and the horizontal coordinates; obtaining the filling relative speed or the density attribute parameter value between the top and bottom interfaces of the volcano geological body; and obtaining a three dimensional model of the stratum. The eruption-facies volcanic rock geological body three dimensional modeling method based on computer graphics can effectively reduce the higher dependency of modeling on the development data, can overcome the high requirement for computer performance at the same time, can improve the modeling efficiency and enhance the modificability of the model at the same time, enables the modeling result to accord with the requirement of research and the practical geological situation.

Description

technical field [0001] The invention belongs to the technical field of exploration and development of oil and gas fields, and in particular relates to a three-dimensional modeling method for eruptive facies volcanic rock geological bodies based on computer graphics. Background technique [0002] The reserves of igneous oil and gas reservoirs continue to grow, and have become one of the important fields of exploration and development in my country. In areas where igneous rocks are developed, due to the great contrast between igneous rocks and sedimentary rocks in terms of petrophysical properties, it has the characteristics of high speed and high density, and has a strong shielding and absorption effect on seismic waves. Strong reflections and multiple reflections often occur in igneous rock formations. Accompanied by the emergence of strong converted waves, the quality of seismic data between igneous rock formations and the overlying strata under igneous rocks is poor, which...

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Problems solved by technology

High dependence on data is one of the shortcomings of existing modeling methods

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