A Cooperative Target Position Inversion Method Based on Stereoscopic Gravity and Magnetic Data of Open Ground Well

Abstract

The present invention discloses a space well stereoscopic gravity-magnetic data cooperative target position inversion method. The method comprises the steps of: employing the same target function to establish a relation equation between data, and setting inverted weight coefficients according to precision of different space data so as to obtain accurate space distribution of underground materials;and obtaining multiplicity of solution capable of effectively reducing inversion through stereoscopic gravity-magnetic data cooperative forward and inversion on the basis of gravity-magnetic responseof different heights of the same geological target. The space well stereoscopic gravity-magnetic data cooperative target position inversion method is reasonable in design, clear in thinking, convenient in operation and high in inversion result accuracy, can effectively reduce the exploration cost, and employs the space well cooperative forward and inversion to effectively reduce the result multiplicity of solution so as to provide a more accurate result, accurately divide a target region of the next step exploration and greatly reduce the exploration cost, and therefore, the method is safe and stable, and wide in application range, and facilitates promotion and popularization.

Description

technical field [0001] The invention belongs to the technical field of earth sciences, and more specifically relates to a method for inversion of a target position in coordination with three-dimensional gravity and magnetic data of empty ground wells. Background technique [0002] For the geophysical exploration work in difficult-to-access areas, as well as the goal of improving the resolution of geological bodies and reducing the ambiguity of interpretation results, on the basis of the existing ground gravity and magnetic exploration, aerial exploration and borehole exploration have become new types of gravity and magnetic exploration in recent years. Therefore, the acquisition of air-ground-well three-dimensional gravity and magnetic data is realized. Gravity and magnetic exploration has the advantages of large-scale, fast speed, and low cost. It is the first exploration in all geophysical work, and the interpretation of the data is the next step. Seismic, well and other f...

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Problems solved by technology

[0002] For the geophysical exploration work in difficult-to-access areas, as well as the goal of improving the resolution of geological bodies and reducing the multi-solution of interpretation results, on the basis of the existing ground gravity and magnetic exploration, aerial exploration and borehole exploration have become new types of gravity and magnetic exploration in recent years. Therefore, the acquisition of air-ground-well three-dimensional gravity and magnetic data has been realized. Gravity and magnetic exploration has the advantages of large-scale, fast speed, and low cost. It is the first exploration in all geophysical work, and the interpretation of the data is the next step. Seismic, well and other fine and expensive geophysical exploration methods provide exploration targets, and the accuracy of the results directly determines the accuracy of resource targets. If the results are inaccurate, it will cause waste of fine exploration. In the past, ground gravity and magnetic exploration used a single Inversion of underground targets with data, the results have obvious multi-solution and uncertain behavior.

For gravity and magnetic data at different heights, people often use data ratios for inversion, or establish their own inversion equations, which cannot make full use of the advantages of multiple data, and is not conducive to widespread promotion and popularization

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