Mass space homing sphere gravity external correction method

A technology of spatial homing and correction method, applied in the field of geophysical exploration, which can solve problems such as impossible to obtain

Active Publication Date: 2006-02-22
BGP OF CHINA NAT GASOLINEEUM CORP
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  • Application Information

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Problems solved by technology

Using the same instrument and observation network to carry out high-precision gravity surveying in mountainous areas, it is actually impossible to obtain good results as in plain areas

Method used

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  • Mass space homing sphere gravity external correction method
  • Mass space homing sphere gravity external correction method
  • Mass space homing sphere gravity external correction method

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Experimental program
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Effect test

Embodiment 1

[0066] Embodiment 1 (see figure 1 )

[0067] Gravity terrain correction values ​​and intermediate layer correction values ​​are implemented in two steps:

[0068] The first step is to perform spherical terrain correction: make an auxiliary sphere concentric with the geoid sphere through the observation point. Based on the auxiliary sphere, calculate the gravitational influence of the materials above the auxiliary sphere on the observation point and eliminate it; then fill the space below the auxiliary sphere with the materials that make up the terrain, calculate the gravitational effect of this part of the material on the observation point, and add it to into the gravity observations. The terrain correction value of a single square cylinder is calculated by using the square cylinder combination model during correction as follows:

[0069] Δg = Gρ | | ...

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Abstract

This invention relates to space homing sphere gravity outer correction method, which adopts right angle coordinate system to represent earth outline curve surface and large earth ellipsoid and adopts sphere outline correction and shell center correction method to make the homing of earth outline quality; separately computing out gravity correction value and middle layer correction. The outer correction method overcomes the correction error of the traditional exploring data process and correction method.

Description

[0001] Involved areas [0002] The invention relates to a geophysical prospecting method, which is a processing method of gravity prospecting data, in particular, a mass space homing spherical surface gravity external correction method. Background technique [0003] In the past 20 years, due to the development of gravity exploration technology (greatly improved gravimeter observation accuracy and the creation of potential field wavenumber domain technology), and the progress of related technologies (widespread application of computers and improvement of GPS positioning accuracy), high-precision gravity The geological effects of exploration are becoming more and more significant. [0004] The accuracy of gravity exploration is measured by the total accuracy of gravity anomalies. The total accuracy of gravity anomalies is determined by the instrument observation accuracy, internal calibration accuracy (zero calibration and solid tide calibration) and external calibration accura...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V7/02G01V7/00
Inventor 杨占军柴玉璞
Owner BGP OF CHINA NAT GASOLINEEUM CORP
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