CN107153221A - A kind of different ladder degree ratio methods of gravity tectonics identification - Google Patents
A kind of different ladder degree ratio methods of gravity tectonics identification Download PDFInfo
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- CN107153221A CN107153221A CN201710505628.0A CN201710505628A CN107153221A CN 107153221 A CN107153221 A CN 107153221A CN 201710505628 A CN201710505628 A CN 201710505628A CN 107153221 A CN107153221 A CN 107153221A
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- identification
- gravity
- tectonics
- ladder degree
- construction
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V7/00—Measuring gravitational fields or waves; Gravimetric prospecting or detecting
- G01V7/02—Details
- G01V7/06—Analysis or interpretation of gravimetric records
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
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Abstract
The invention discloses a kind of different ladder degree ratio methods of gravity tectonics identification, the present invention breaches the traditional thought for carrying out conformation identification using single gradient and same order gradient ratio in the past, it makes full use of the advantage of different order derivatives, and the shortcoming that high-order calculates caused interference increase is avoided in actual applications, it can become apparent from and mark off the positional information of construction exactly, and improve the resolution capability to depthwise construction.
Description
Technical field
The present invention relates to earth science and technology field, specially a kind of different ladder degree ratio methods of gravity tectonics identification.
Background technology
The different ladder degree ratio methods of gravity tectonics identification are that the ratio for comprehensively utilizing the horizontal and vertical gradient of not same order comes
The position of construction is recognized, it breaks through the theory for carrying out conformation identification only with single gradient or same order gradient ratio in the past, structure first
The Boundary Recognition function based on different gradient ratios is built, comprehensively utilizing the distribution characteristics of different ladder degree can become apparent from and accurate
The distribution of construction really is obtained, its extreme value can directly identify the horizontal level of construction.
In addition, the calculating of high-order vertical derivatives can significantly increase the interference of noise in actually calculating, vertically led in high-order
Number is carried out in calculating using the Laplace's equation of potential field satisfaction, so that the calculating of high-order vertical derivatives can be led using level
Several calculating combinations, the calculating of horizontal derivative will not significantly increase the influence of noise, more stablize and accurate so as to obtain
As a result.
Fracture is the vital task of gravity data interpretation, and it is for analyzed area structural evolution, plate formation, oil-gas reservoir etc.
Important value is respectively provided with, this method proves the resolution ratio and precision for fault recognition of high-order vertical derivatives from theory deduction
It is higher than low order, and the ratio of same order can not significantly more highlight the feature of fracture, so that this method can obtain more accurate
True fracture position.
The identification of construction location is carried out using single gradient, is to utilize horizontal derivative extreme value, vertical derivatives null value and geologic body
Corresponding relation carry out, but because derivative has the characteristics of being speeded with depth attenuation, can not obtain clearly for deeper construction
Clear reflection.Exist significantly not corresponding between same order level and the characteristic point of vertical gradient ratio, therefore entered using its ratio
Row identification, can not comprehensively utilize the feature of different gradients.Being derived from the theoretical formula of class rift structure proves not same order level
Characteristic value between vertical gradient is corresponding, and the calculating of higher derivative can improve the horizontal resolution to geologic body,
Therefore the different ladder degree ratio methods of gravity tectonics identification are proposed to carry out the identification of fracture position, are analyzed area construction feature
And And Hydrocarbon Potential has important value.
The content of the invention
It is an object of the invention to provide a kind of different ladder degree ratio methods of gravity tectonics identification, to solve above-mentioned background
The problem of being proposed in technology.
To achieve the above object, the present invention provides following technical scheme：A kind of different ladder degree ratios of gravity tectonics identification
Value method, using following formula：
Wherein,
It is preferred that, in addition to following expression：
Wherein,
Compared with prior art, the beneficial effects of the invention are as follows：The present invention is breached in the past using single gradient and same ladder
The traditional thought that ratio carries out conformation identification is spent, it makes full use of the advantage of different order derivatives, and avoids in actual applications
High-order calculates the shortcoming of caused interference increase, can become apparent from and mark off exactly the positional information of construction, and improve
To the resolution capability of depthwise construction；Gravity tectonics recognition methods of the invention based on different gradient ratios, it is comprehensively utilized not
The distribution characteristics of same order gradient can become apparent from and obtain exactly the distribution of construction, and its extreme value can directly identify the water of construction
Prosposition is put.Relatively conventional single gradient and same order gradient ratio has higher resolution ratio and accuracy.
Brief description of the drawings
Fig. 1 is processes of research ＆ development figure of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Referring to Fig. 1, the present invention provides a kind of technical scheme：A kind of different ladder degree ratio methods of gravity tectonics identification,
Using following formula：
Wherein,
Also include following expression：
Wherein,
The calculating of high-order vertical derivatives can significantly increase the interference of noise in actual calculating, in the calculating of high-order vertical derivatives
The Laplace's equation that is met using potential field is carried out, so that calculating for high-order vertical derivatives can use the calculating of horizontal derivative
Combination, the calculating of horizontal derivative will not significantly increase the influence of noise, more stablize and accurate result so as to obtain.
Embodiment：
Using real data come the application effect of method of testing, data are East China Sea gravity measured data, in order to contrast
The resolution capability of researched and developed method, it is contrasted with conventional Theta map (Wijns, 2005), its expression formula is：
The extreme value of three kinds of methods characterizes the positional information of construction in actual result, and development approach of the invention has more
Good resolution ratio, can more accurately provide the positional information of fracture, simpler, conveniently for following explanations.
Oil gas convergence is mostly the crossover location of multiple fractures, therefore is broken the position that the accuracy divided directly determines drilling well
Put, accurate result can be effectively reduced the cost of oil-gas exploration, it is to avoid unnecessary loss.Fracture position is subregion plate structure
Unit, geodynamical chief component are made, its accuracy directly determines that earth model is distributed.
The present invention breaches the traditional thought for carrying out conformation identification using single gradient and same order gradient ratio in the past, and its is abundant
Using the advantage of different order derivatives, and the shortcoming that high-order calculates caused interference increase is avoided in actual applications, can be more
Plus it is clear and mark off the positional information of construction exactly, and improve the resolution capability to depthwise construction；The present invention is not based on
With the gravity tectonics recognition methods of gradient ratio, its distribution characteristics for comprehensively utilizing different ladder degree can become apparent from and exactly
The distribution of construction is obtained, its extreme value can directly identify the horizontal level of construction.Relatively conventional single gradient and same order gradient ratio
With higher resolution ratio and accuracy.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of changes, modification can be carried out to these embodiments, replace without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (2)
1. a kind of different ladder degree ratio methods of gravity tectonics identification, it is characterised in that：Using following formula：
Wherein,
2. a kind of different ladder degree ratio methods of gravity tectonics identification according to claim 1, it is characterised in that：Also include
Following expression：
Wherein,
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710505628.0A CN107153221A (en) | 2017-06-28 | 2017-06-28 | A kind of different ladder degree ratio methods of gravity tectonics identification |
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| CN201710505628.0A CN107153221A (en) | 2017-06-28 | 2017-06-28 | A kind of different ladder degree ratio methods of gravity tectonics identification |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111142170A (en) * | 2020-02-25 | 2020-05-12 | 中国地质大学（北京） | Submarine position detection method based on gravity gradient extreme point |
| CN112596113A (en) * | 2021-01-08 | 2021-04-02 | 吉林大学 | Method for identifying field source position based on intersection points of characteristic values of different gradients of gravity |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012021938A1 (en) * | 2010-08-20 | 2012-02-23 | Technological Resources Pty Limited | A method of analysing data obtained using a gravity gradiometer |
| CN104280784A (en) * | 2013-07-12 | 2015-01-14 | 中国石油天然气集团公司 | Method for recognizing small fracture through gravity |
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2017
- 2017-06-28 CN CN201710505628.0A patent/CN107153221A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012021938A1 (en) * | 2010-08-20 | 2012-02-23 | Technological Resources Pty Limited | A method of analysing data obtained using a gravity gradiometer |
| CN104280784A (en) * | 2013-07-12 | 2015-01-14 | 中国石油天然气集团公司 | Method for recognizing small fracture through gravity |
Non-Patent Citations (6)
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| 刘鹏飞: "Tilt梯度算法的改进与应用：以江苏韦岗铁矿为例", 《地球科学-中国地质大学学报》 * |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111142170A (en) * | 2020-02-25 | 2020-05-12 | 中国地质大学（北京） | Submarine position detection method based on gravity gradient extreme point |
| CN111142170B (en) * | 2020-02-25 | 2021-07-02 | 中国地质大学（北京） | Submarine position detection method based on gravity gradient extreme point |
| CN112596113A (en) * | 2021-01-08 | 2021-04-02 | 吉林大学 | Method for identifying field source position based on intersection points of characteristic values of different gradients of gravity |
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Application publication date: 20170912 |