A method and device for establishing a two-dimensional near-surface geological model

Abstract

The invention provides a method and equipment for establishing a two-dimensional near-surface geological model. The method includes: measuring near-surface data, stratum geological data, and surface elevation data of a seismic exploration work area; The range data and the depth data of the subsurface geological targets in the stratigraphic geological data establish the geological model framework; the geological initial model is formed according to the surface elevation curve in the surface elevation data and the geological model framework; the near-surface structure data points in the near-surface data are assigned to the geological In the initial model, a two-dimensional near-surface geological model was obtained. The method and equipment of the present invention solve the defect that the geological model establishment technology in the prior art can only establish a geological model with a constant speed in the geological model block, and cannot establish a complex geological model with a speed change in the geological model block, and realizes In order to automatically convert the surface and near-surface data obtained directly from field measurements into an 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, in particular to the establishment technology of the geological model of the earth's surface, specifically 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 oil and gas reservoirs with complex structures has become one of the difficulties in reservoir prediction. Geophysical numerical forward modeling is a method of using the known spatial distribution of the surface and underground strata and the internal physical properties of the strata to establish a geological model, designing different observation systems according to exploration targets, and using computer technology to simulate seismic wave propagation phenomena. Establishing an accurate near-surface geological model is the basic work of geo...

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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

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