Sea magneto-telluric field non-linear conjugate gradient three-dimensional parallel inversion method

Abstract

The invention discloses a sea magneto-telluric field non-linear conjugate gradient three-dimensional parallel inversion method, comprising the steps of: adding a sea layer with a fixed resistivity value into an initial model, and deriving the interpolation expression and computational process of the magneto-telluric field value with sea layer model each node to realize directive calculation; and deriving the computational expression and solution process of the model modifiers (a computational process mainly comprises variable parameters such as an objective function, an objective function gradient, a searching direction, a searching step size, etc.) with sea layer model each node to realize directive calculation. The method is suitable for magneto-telluric field non-linear conjugate gradient three-dimensional inversion of sea or other water areas.

Description

technical field [0001] The invention relates to the processing technical field of the magnetotelluric sounding method, in particular to a three-dimensional parallel inversion method of the marine magnetotelluric field nonlinear conjugate gradient. Background technique [0002] The magnetotelluric sounding method is widely used in deep geological exploration and exploration of minerals, water, oil, geothermal and other resources. At present, two-dimensional inversion is the mainstream method of data processing, and there are few studies on three-dimensional inversion methods. Foreign scientists have proposed methods such as fast relaxation method, conjugate gradient method, nonlinear conjugate gradient method, etc., which have been realized in China. Fast relaxation and conjugate gradient methods. [0003] At present, the development of marine resources has become an important development direction. Existing 3D magnetotelluric inversions are land-based data processing metho...

AI Technical Summary

Problems solved by technology

Existing 3D magnetotelluric inversions are land-based data processing methods, which can only invert the magnetotelluric field data measured on the surface (air-ground interface), and cannot process underwater geodetic data such as the seabed.

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