Method and equipment for building two-dimensional near-surface geological model

Abstract

The invention provides a method and equipment for building a two-dimensional near-surface geological model. The method comprises the steps: near-surface data, stratigraphic geological data and surface elevation data of a seismic exploration work area are measured; a geological model framework is built according to lateral range data of a two-dimensional measuring line in the near-surface data and depth data of an underground geological target in the stratigraphic geological data; an original geological model is formed according to a surface elevation curve in the surface elevation data and the geological model framework; near-surface structure data points in the near-surface data are distributed to the original geological model to obtain the two-dimensional near-surface geological model. The method and equipment eliminate the defect that in a geological model building technique in the prior art, only a geological model with a constant velocity in a geological model block can be built, and a complicated geological model with a changing velocity in the geological model block cannot be built, and can automatically convert the surface and near-surface data obtained directly from field measurement into the accurate two-dimensional near-surface geological model.

Description

Technical field [0001] The present invention relates to the field of petroleum and natural gas exploration and development, particularly to the technology for establishing a geological model of the surface, and specifically is a method and equipment for establishing a two-dimensional near-surface geological model. Background technique [0002] Under the background of increasingly complex exploration conditions, the exploration of complex structural oil and gas reservoirs has become one of the difficulties in reservoir prediction. Geophysical numerical forward simulation is a method that uses the known spatial distribution of the ground surface and underground strata and the internal physical properties of the strata to establish a geological model, designs different observation systems according to exploration targets, and uses computer technology to simulate the phenomenon of seismic wave propagation. Establishing an accurate near-surface geological model is the basic work of ge...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the above-mentioned problems in the prior art, the present invention provides a method and equipment for establishing a two-dimensional near-surface geological model, which solves the problem that the geological model establishment technology in the prior art can only establish a constant velocity within the geological model block The geological model cannot be applied to establish the defect in the complex geological model of the speed change in the geological model block, and realizes the automatic transformation of the surface and near-surface data directly obtained from field measurements into an accurate two-dimensional near-surface geological model

Images