High-precision aviation ground and well different space gravity and magnetic data transforming method

Abstract

The invention discloses a high-precision aviation ground and well different space gravity and magnetic data transforming method. The high-precision aviation ground and well different space gravity andmagnetic data transforming method proves that the downward continuation calculation can be completed by the sum of the upward continuation and a horizontal derivative through the Taylor series expansion. The calculation of the upward continuation and the horizontal derivative is stable, and is less affected by the noise; in order to compensate for the error caused by the derivative order being aneffective term, the horizontal derivative iteration method of an abnormal downward continuation is used to effectively enhance the stability and accuracy of the calculation result. The invention proves that the downward continuation calculation can be completed by the sum of the upward continuation and the horizontal derivative through the Taylor series expansion. The calculation of the upward continuation and the horizontal derivative is stable, and is less affected by the noise; in order to compensate for the error caused by the derivative order being an effective term, the horizontal derivative iteration method of an abnormal downward continuation is used to effectively enhance the stability and accuracy of the calculation result.

Description

technical field [0001] The invention belongs to the technical field of earth sciences, and more specifically relates to a method for transforming gravity and magnetic data in different spaces of high-precision air-ground wells. Background technique [0002] For mineral and oil and gas resource potential areas, in order to understand the distribution of underground materials at different depths, aerial, ground, and well gravity and magnetic measurements are often carried out in an area, so as to use data from different spaces to jointly complete the depth and physical properties of underground geological bodies. It can effectively improve the accuracy and reliability of interpretation results. However, in actual exploration, the range and scale of data in different spaces are different, so most of the time it is necessary to use data from other spaces to convert and fill in missing data. Therefore, the transformation technology of gravity and magnetic data in different spaces...

AI Technical Summary

Problems solved by technology

However, in actual exploration, the range and scale of data in different spaces are different, so most of the time it is necessary to use data from other spaces to convert and fill in missing data. Therefore, the transformation technology of gravity and magnetic data in different spaces is to carry out space-ground-well location The premise of joint inversion of field data, and its transformation accuracy is also the main factor restricting the inversion accuracy

[0003] The acquisition of different spatial potential field data is realized by using the upward and downward continuation technology, and the upward continuation is carried out using the frequency domain formula, which has the advantages of fast calculation speed and less interference by noise; if the downward continuation uses the frequency domain The technical progress is unstable, and it will significantly increase the noise interference, causing the measured curve to jump strongly, resulting in low measurement accuracy and inaccurate measured data. It is increasingly unable to meet people's needs. Conducive to widespread promotion and popularization

Images