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Different-ladder degree ratio method for gravity structure recognition

A ratio method and structure technology, applied in the direction of measuring gravitational field, instruments, measuring devices, etc., can solve the problems that cannot be comprehensively utilized, and deep structures cannot be clearly reflected, so as to achieve high resolution and accuracy, and improve the resolution ability Effect

Inactive Publication Date: 2017-09-12
JILIN UNIV
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Problems solved by technology

[0005] Using a single gradient to identify the structural position is based on the corresponding relationship between the extreme value of the horizontal derivative, the zero value of the vertical derivative and the geological body. However, because the derivative has the characteristic of attenuation and acceleration with depth, it is impossible to obtain a clear view of the deeper structure. reflection of
There is an obvious mismatch between the feature points of the ratio of the horizontal and vertical gradients of the same order, so using their ratios for identification cannot comprehensively utilize the features of different gradients

Method used

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Embodiment

[0024] The actual data is used to test the application effect of the method. The data is the measured gravity data of the East China Sea. In order to compare the resolution ability of the developed method, it is compared with the commonly used Theta map (Wijns, 2005). The expression is:

[0025]

[0026] In the actual results, the extremum values ​​of the three methods all represent the location information of the structure. The development method of the present invention has better resolution, can give the location information of the fracture more accurately, and is simpler and more convenient for subsequent explanations.

[0027] The accumulation of oil and gas is mostly the intersection of multiple faults, so the accuracy of fault division directly determines the location of drilling. Accurate results can effectively reduce the cost of oil and gas exploration and avoid unnecessary losses. The location of fractures is a major component of zonal plate tectonic units, geodyn...

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Abstract

The invention discloses a different-ladder degree ratio method for gravity structure recognition. A conventional idea that structure recognition is carried out by using ratios of single ladder degrees and same-order ladder degrees is broken through, advantages of different order derivatives are sufficiently taken, the defect that interference caused by high-order calculation is increased is avoided in practical application, position information of structures can be relatively clearly and accurately divided, in addition, the distinguishing performance upon deep structures is improved.

Description

technical field [0001] The invention relates to the field of earth science and technology, in particular to a different-order gradient ratio method for gravity structure identification. Background technique [0002] The gradient ratio method of different orders for gravity structure identification is to comprehensively use the ratio of different orders of horizontal and vertical gradients to identify the position of the structure. The boundary identification function of the ratio, the comprehensive use of the distribution characteristics of different order gradients can obtain the distribution of the structure more clearly and accurately, and its extreme value can directly identify the horizontal position of the structure. [0003] In addition, the calculation of high-order vertical derivatives will significantly increase the interference of noise in actual calculations. In the calculation of high-order vertical derivatives, the Laplace equation satisfied by the potential fi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V7/06
CPCG01V7/06
Inventor 马国庆李丽丽王泰涵周帅
Owner JILIN UNIV
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