Static displacement correction method and device
A correction method and static displacement technology, applied in the field of geophysical exploration, can solve the problems of less application, low correction efficiency, poor correction effect, etc., and achieve the effect of eliminating distortion points, improving efficiency, and improving static displacement correction effect.
Pending Publication Date: 2021-07-16
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology
However, these methods are mainly used in two-dimensional magnetotelluric prospecting, and are rarely used in three-dimensional magnetotelluric prospecting.
However, the static displacement correction method applied to the three-dimensional magnetotelluric not only has the problem of poor correction effect, but also has the problem of low correction efficiency
[0005] Therefore, the existing static displacement correction has the problems of poor correction effect and low correction efficiency
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[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.
[0045] figure 1 The implementation process of the static displacement correction method provided by the embodiment of the present invention is shown. For the convenience of description, only the parts related to the embodiment of the present invention are shown. The details are as follows:
[0046] Such as figure 1As shown, the static displacement correction method includes:
[0047] Step 101, determine each original apparent resistivity in the original apparent resistivity data volume including all apparent resistivity data in the preset direction; the original appare...
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The invention discloses a static displacement correction method and device. The method comprises the steps of filtering original apparent resistivity to obtain second apparent resistivity; replacing the apparent resistivity of the original apparent resistivity with the apparent resistivity in the second apparent resistivity of which the relative error is not less than a preset relative error threshold value to obtain a third apparent resistivity data body; determining fourth apparent resistivity in the third apparent resistivity data body; filtering the fourth apparent resistivity to obtain a filtering result, namely, sixth apparent resistivity; and determining a fourth apparent resistivity data body after static correction according to the fourth apparent resistivity, the corresponding sixth apparent resistivity and the second apparent resistivity data body. According to the invention, distortion points in apparent resistivity can be eliminated, and the static displacement correction effect is improved; and meanwhile, distortion points are eliminated based on relative errors, the distortion points in apparent resistivity can be eliminated without other processing, and the static displacement correction efficiency is improved.
Description
technical field [0001] The invention relates to the technical field of geophysical exploration, in particular to a static displacement correction method and device. Background technique [0002] This section is intended to provide a background or context to embodiments of the invention that are recited in the claims. The descriptions herein are not admitted to be prior art by inclusion in this section. [0003] In magnetotelluric detection and exploration, when there is a local electrical inhomogeneity near the surface, the surface of the electrical inhomogeneity will generate accumulated charges under the action of an external electric field, thereby generating an additional electric field, resulting in distortion of the observed electric field. Almost independent of frequency. The measured apparent resistivity is distorted, which is mainly manifested in that the single-point curve shifts a fixed value upward or downward along the resistivity axis in the double-logarithmi...
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IPC IPC(8): G01V3/38
CPCG01V3/38
Inventor 陶德强
Owner BC P INC CHINA NAT PETROLEUM CORP