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

Abstract

The invention discloses a three-dimensional modeling method of eruptive phase volcanic rock geological bodies based on computer graphics. It mainly includes selecting seismic result profiles and seismic attribute slices, depicting corresponding main views of the top and bottom surfaces of the eruptive phase volcanic body, and determining the top and bottom surfaces of the volcanic body. The functional relationship between the elevation and the spatial lateral distribution of the volcanic body, depicting the top view corresponding to the volcanic body shape in the eruption phase, two-dimensional linear interpolation, determining the correspondence between the spatial distribution range of the volcanic body and the plane coordinates, and determining the top of the volcanic rock body. The functional correspondence between the elevation of the bottom interface and the plane coordinates is used to fill in the corresponding velocity or density attribute parameter values ​​between the top and bottom interfaces of the obtained volcanic geological body to obtain a three-dimensional model of the formation. The present invention effectively reduces modeling's strong dependence on development data, and at the same time overcomes the high requirements for computer performance. It improves modeling efficiency while enhancing model modifiability, so that modeling results meet research requirements and are in line with reality. Geological condition.

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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