Structural constraint-based normalized gravity-magnetic-electric-seismic joint inversion method

A joint inversion and structure-constrained technology, applied in geophysical surveying, instruments, etc., can solve the coupling problems of large different physical parameters, cannot deal with complex model problems, and does not consider the normalized order of magnitude difference, etc., to reduce the inversion Multiple solutions, avoiding direct coupling inversion, and improving the effect of resolution
CN108680964AInactive Publication Date: 2018-10-19JILIN UNIV
0 Cites 34 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
JILIN UNIV
Publication Date
2018-10-19
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a structural constraint-based normalized gravity-magnetic-electric-seismic joint inversion method. The method includes the following steps that: S1, a normalized joint inversion objective function is established; S2, an initial model is established; S3, forward calculation and Jacobian matrix solving are carried out; S4, a normalized cross-gradient partial derivative and Lagrangian operator are calculated; S5, an iterative model is calculated; and S6, forward calculation is performed on the obtained iterative model, and the fitting difference of calculation results andobservation data is solved, if the fitting difference increases, the maximum number of iterations is reached, or the fitting difference reaches a threshold, loop inversion is stopped, and a normalizedjoint inversion model is outputted, otherwise S3 is executed. With the structural constraint-based normalized gravity-magnetic-electric-seismic joint inversion method of the invention adopted, the limitations of a single method are eliminated, the non-uniqueness of the inversion of geophysical inversion is decreased; and wrong inversion results caused by inversion based on the direct coupling ofphysical property parameters with large differences in order of magnitudes can be avoided. The method does not rely on the physical property relations of rock.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the field of simultaneous processing of four geophysical methods including gravity, magnetic method, magnetotelluric method and seismic first arrival wave travel time, and in particular provides a normalized gravity, magnetic, electric and seismic joint inversion method based on structural constraints. Background technique

[0002] According to different petrophysical parameters, geophysical methods can be divided into gravity, magnetic, seismic, and electrical methods. Gravity and magnetic methods have good horizontal resolution and play an important role in the division of geological structure distribution, but Poor capability and shallow exploration depth; the exploration depth of magnetotelluric sounding (MT) is related to the frequency. Due to the rich frequency range, its exploration depth reaches tens or hundreds of kilometers, and it is not shielded by high-resistivity layers. Good conductor has the advantages of sensit...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More