CN113673073A - Stratum turning point marking method and device - Google Patents
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Abstract
The stratum turning point marking method and the stratum turning point marking device provided by the invention have the advantages that the seismic section is converted into the corresponding relation curve of the well track length and the horizon depth with obvious characteristics, the slope of each point can be counted by computer software through the corresponding relation curve, and then whether the turning point is judged by presetting a stratum dip angle change threshold value, the whole calculation processing process is clear and definite, manual subjective marking is not needed, manpower and material resources are saved, meanwhile, the stratum dip angle change threshold value provides a uniform standard for the measurement of the turning point, and the marking of the turning point is more accurate.
Description
Technical Field
The invention relates to the technical field of exploration of oil fields, in particular to a method and a device for marking a turning point of a stratum.
Background
With the comprehensive development of shale gas reservoirs in the Sichuan basin, uninterrupted well position tracking service needs to be provided by seismic exploration, wherein an important circle is to mark a stratum turning point where a designed well track is located and calculate a stratum dip angle. The existing calculation modes are all visual identification and manual calculation, which not only wastes time and labor, but also has great calculation errors. The judgment standard of the turning point has great human subjective consciousness and is lack of standard.
Disclosure of Invention
In order to solve the foregoing disadvantages, an embodiment of a first aspect of the present invention provides a method for marking a formation turning point, including:
acquiring a seismic section at the position of the horizontal well section;
drawing and forming a corresponding relation curve of the well track length and the horizon depth according to the horizon depth data in the seismic profile and the seismic line channel number data;
determining a formation dip change threshold based on geological requirements of the well;
and marking the turning point of the stratum according to the stratum dip angle change threshold and the corresponding relation curve.
In some embodiments, the method for marking formation turning points further comprises:
carrying out smoothing treatment on the corresponding relation curve;
the determining a formation dip change threshold based on the geological requirements of the well bore comprises:
and determining a stratum inclination angle change threshold according to the smoothness degree of the smoothing processing and the geological requirements of the well drilling.
In some embodiments, the marking the formation turning point according to the formation dip angle variation threshold and the corresponding relationship curve includes:
dividing the corresponding relation curve into a plurality of intervals according to a set interval;
and in each interval, marking a first type stratum turning point according to the slope signs before and after each point in the corresponding relation curve, wherein the first type stratum turning point is a point with opposite slope signs of two adjacent points before and after the corresponding relation curve.
In some embodiments, the marking the formation turning point according to the formation dip angle variation threshold and the corresponding relationship curve includes:
dividing the corresponding relation curve into a plurality of intervals according to a set interval;
in each interval, marking a second type of stratum turning point according to a slope change value between two adjacent points in the corresponding relation curve and the stratum dip angle change threshold; the slope change value between the second type stratum turning point and the next point adjacent to the second type stratum turning point is larger than the stratum inclination angle change threshold value.
In some embodiments, the smoothing the correspondence curve includes:
and smoothing the corresponding relation curve by adopting a lowess smoothing function.
In a second aspect of the present invention, an apparatus for marking a turning point of a formation includes:
the seismic profile acquisition module is used for acquiring a seismic profile at the position of the horizontal well section;
the corresponding relation curve drawing module is used for drawing and forming a corresponding relation curve of the well track length and the horizon depth according to the horizon depth data and the seismic line channel number data in the seismic profile;
the stratum inclination angle change threshold value determining module is used for determining a stratum inclination angle change threshold value based on the geological requirements of the drilling well;
and the stratum turning point determining module marks the stratum turning point according to the stratum inclination angle change threshold and the corresponding relation curve.
In some embodiments, the formation turning point labeling apparatus further comprises:
the smoothing module is used for smoothing the corresponding relation curve;
and the stratum inclination angle change threshold value determining module determines a stratum inclination angle change threshold value according to the smoothness degree of the smoothing processing and the geological requirements of the well drilling.
In certain embodiments, the formation turning point determination module comprises:
the interval dividing unit is used for dividing the corresponding relation curve into a plurality of intervals according to a set interval;
and the first type of stratum turning point is marked according to the slope signs before and after each point in the corresponding relation curve in each interval, and is a point with opposite slope signs of two adjacent points before and after the corresponding relation curve.
In certain embodiments, the formation turning point determination module comprises:
the interval dividing unit is used for dividing the corresponding relation curve into a plurality of intervals according to a set interval;
a second turning point determining unit, which marks a second type of stratum turning point according to the slope change value between two adjacent points in the corresponding relation curve and the stratum dip angle change threshold value in each interval; the slope change value between the second type stratum turning point and the next point adjacent to the second type stratum turning point is larger than the stratum inclination angle change threshold value.
In some embodiments, the smoothing module smoothes the correspondence curve using a lowess smoothing function.
In a third aspect, the present invention provides an electronic device, which includes a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the formation turning point labeling method as described above.
A fourth aspect of the present invention provides a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the steps of the formation turning point labeling method as described above.
The invention has the following beneficial effects:
the stratum turning point marking method and the stratum turning point marking device provided by the invention have the advantages that the seismic section is converted into the corresponding relation curve of the well track length and the horizon depth with obvious characteristics, the slope of each point can be counted by computer software through the corresponding relation curve, and then whether the turning point is judged by presetting a stratum dip angle change threshold value, the whole calculation processing process is clear and definite, manual subjective marking is not needed, manpower and material resources are saved, meanwhile, the stratum dip angle change threshold value provides a uniform standard for the measurement of the turning point, and the marking of the turning point is more accurate.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 shows a schematic flow chart of a method for marking a formation turning point in an embodiment of the invention.
FIG. 2 shows a horizontal wellbore section seismic profile in an embodiment of the invention.
FIG. 3 shows a before-after comparison diagram of horizon smoothing in an embodiment of the invention.
FIG. 4 shows a comparison graph of turning point identification in an embodiment of the present invention.
Fig. 5 illustrates a turning point diagram manually identified in an embodiment of the present invention.
Fig. 6 shows a schematic structural diagram of a formation turning point marking device in an embodiment of the invention.
FIG. 7 shows a schematic diagram of an electronic device suitable for use in implementing embodiments of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
FIG. 1 illustrates a method for marking a turning point of a formation, which includes:
s1: acquiring a seismic section at the position of the horizontal well section;
s2: drawing and forming a corresponding relation curve of the well track length and the horizon depth according to the horizon depth data in the seismic profile and the seismic line channel number data;
s2: determining a formation dip change threshold based on geological requirements of the well;
s4: and marking the turning point of the stratum according to the stratum dip angle change threshold and the corresponding relation curve.
The stratum turning point marking method provided by the invention has the advantages that the seismic section is converted into the corresponding relation curve of the well track length and the horizon depth with obvious characteristics, the slope of each point can be counted by computer software through the corresponding relation curve, and then whether the turning point is judged by presetting a stratum dip angle change threshold value, the whole calculation processing process is clear and definite, manual subjective marking is not needed, manpower and material resources are saved, meanwhile, the stratum dip angle change threshold value provides a uniform standard for the measurement of the turning point, and the marking of the turning point is more accurate.
In step S2, first, horizon depth data and seismic line track number data need to be acquired, and a seismic depth horizon with a design target segment 1 × 1 grid density, including line number, track number, coordinates, and depth, can be acquired through a depth domain conversion of a fine horizon time domain interpretation result and time domain data established by a fine velocity field. If the bin size is B (m), the calculation precision range of the bin along the well track is (B to V2B); in the current three-dimensional collection, the size of a bin is generally 20 multiplied by 20, the calculation precision is 20 meters to 28.3 meters, namely the step interval between data points is 20 meters to 28.3 meters, and the requirement of drilling precision is met.
In step S3, the inclination change threshold is finally determined according to drilling engineering requirements, which are determined according to geological requirements of the drilling. When the inclination angle is changed by more than a certain degree, the change of the turning point can be regarded as a specific condition, and the inclination angle change threshold value is set according to the change of the turning point.
In addition, in some embodiments, the method for marking a formation turning point further includes:
carrying out smoothing treatment on the corresponding relation curve;
that is, step S3 is specifically, in this embodiment:
and determining a stratum inclination angle change threshold according to the smoothness degree of the smoothing processing and the geological requirements of the well drilling.
In this embodiment, the formation horizon data may appear slightly jittered due to the quality of the data. Such jitter cannot represent the change of the formation morphology, but affects the determination of the formation turning point and the calculation of the dip angle, so that the depth domain data needs to be smoothed. And reasonable smoothing parameters and smoothing functions are set according to the surface element size and the precision and accuracy of the horizon interpretation result, target horizon data are reasonably smoothed, and calculation interference caused by micro jitter of local horizon data is eliminated.
In the well position tracking process, when the stratum inclination angle changes greatly, the stratum is considered as a stratum turning point. However, the specific change is much considered as a turning point, and the practical operation has great randomness. In order to complete the automatic calculation of the turning points, the specifications are organized into two turning point types, I-type turning points and II-type turning points. For the class I turning point, the turning point is an uphill and downhill turning point, and the signs of the slopes before and after the turning point are opposite, so that the turning point can be regarded as a mathematically stationary point. The type II turning point has the same slope sign before and after the turning point, but the slope change value exceeds a certain threshold value. The change of the stratum dip angle between the turning points can be approximately regarded as constant, and is characterized by the average dip angle.
That is, in some embodiments, the step of identifying the type I inflection point is as follows:
s41: dividing the corresponding relation curve into a plurality of intervals according to a set interval;
s42: and in each interval, marking a first type stratum turning point according to the slope signs before and after each point in the corresponding relation curve, wherein the first type stratum turning point is a point with opposite slope signs of two adjacent points before and after the corresponding relation curve.
The identification procedure for class II turning points is as follows:
s43: dividing the corresponding relation curve into a plurality of intervals according to a set interval;
s44: in each interval, marking a second type of stratum turning point according to a slope change value between two adjacent points in the corresponding relation curve and the stratum dip angle change threshold; the slope change value between the second type stratum turning point and the next point adjacent to the second type stratum turning point is larger than the stratum inclination angle change threshold value.
In specific implementation, based on the smooth stratum data, the stratum inclination angle array is calculated, and the position of an extreme point of the stratum inclination angle curve is searched. The searched extreme point position is the mathematical turning point of the stratum horizon data, namely the turning point of the concave-convex interface connection; dividing the stratum horizon curve into a plurality of intervals, and respectively searching stratum turning points for stratum data in each interval, wherein the method specifically comprises the following steps:
(a) if the turning point in the interval is the I-type turning point, searching the extreme point of the interval, wherein theoretically the extreme point has one point and only one point;
(b) if the turning point in the interval is a type II turning point, searching the maximum inclination angle change value between the single step lengths in the interval, comparing the maximum inclination angle change value with an inclination angle change threshold value, and if the maximum inclination angle change value is greater than the inclination angle change threshold value, determining that the point is the type II turning point;
(c) if the stratum has no I-type turning point and no II-type turning point, the stratum is considered to have no turning point under the threshold value;
then, calculating the average dip angle value of the stratum in each interval according to the interval divided by the turning points; outputting the line number, the coordinate and the depth of the position of the turning point, and drawing; and outputting the average dip angle value of the stratum of each interval and drawing.
Based on the calculation program, the work efficiency can be improved. As shown in fig. 4, the dip and inflection points of a well section of about 2000 meters in length were calculated, which required half to several hours of operation in the past, while the shortening currently required only 0.214 seconds (the lowess smoothing function was chosen). Meanwhile, the method can improve the accuracy of judging the turning point. As shown by the arrow in fig. 3, the difference between the turning point identified by the program and the turning point subjectively recognized by the human is large, but the average inclination angle change of the front and rear sections of the turning point identified by the program is the largest in the interval through data analysis, and the inclination angle change of the front and rear sections of the turning point considered by the human subjectively does not exceed the set threshold value. The method can find out the stratum turning points identified by the program, can eliminate the subjectivity of manual identification, and has more accurate turning point identification.
The method can be understood that the seismic section is converted into a corresponding relation curve of the well track length and the horizon depth with obvious characteristics, the slope of each point can be counted by computer software through the corresponding relation curve, and then whether the turning point is judged by presetting a stratum dip angle change threshold value.
An example of a specific scenario is shown below, where seismic software is used to intercept a seismic section at the location of a horizontal well section, as shown in FIG. 2. The axis below the double-strength homodromous axis is a target horizon, the abscissa is a seismic line number, and the ordinate is depth. It can be seen that due to the particularity of seismic profile display, the abscissa is not horizontal segment length data, and cannot directly read the dip angle due to the influence of scale display. Meanwhile, the stratum turning points are identified on the section, so that the turning point positions are difficult to accurately judge and cannot be unified.
The method of the invention specifically implements the following steps in specific operation: firstly, a new layer is created, and the target layer is tracked to obtain layer depth data. Deriving the seismic depth horizon of the designed target section with the density of 1 multiplied by 1 measuring net from seismic interpretation software, normalizing and sorting the horizon according to the format of line number, channel number, x coordinate, y coordinate and depth, and putting the horizon into a program calculation path; and setting a stratum dip angle threshold value. The setting is carried out according to the drilling geological requirements, and if the stratum is smooth, the threshold value can be slightly reduced; a smoothing function, wherein six smoothing parameters are provided in a program, and are respectively an average moving method, a Loess method, a Lowess method, a Robust Loess method, a Robust Lowess method and a Savitzky-Golay method, and the six smoothing parameters are respectively corresponding to indication parameters 1-6; the degree of smoothing is selected. The larger the value, the larger the smoothness; running a program, and judging whether the stratum horizon is smooth reasonably or not according to the graph (figure 3) after smoothing; if the horizon is judged to be smooth and reasonable, continuously calculating to obtain inclination angle data between every two turning points and a turning point diagram (figure 4); fig. 5 is a diagram of the identification of the turning points of the stratum after the manual identification, and it can be seen that the marking of the turning points has great randomness, the reading of the line numbers is inaccurate, and a deviation of 30 meters exists every difference of one line number. Meanwhile, the line number identification of the region with a relatively gentle middle has great randomness, and the position of the turning point is greatly different from that of the automatically identified turning point. Through data inspection, the turning point position automatically identified is accurate, and the manual identification has large deviation.
In terms of time efficiency, the time taken for drawing the section shown in fig. 5 is 1 hour, the time required by the automatic identification program is only less than 1s, and the work such as marking and the like can be completed within 10 minutes, so that the work efficiency is greatly improved.
Therefore, it can be understood that the stratum turning point marking method provided by the invention can be used for calculating the slope of each point by utilizing computer software through converting the seismic section into the corresponding relation curve of the well track length and the horizon depth with obvious characteristics, and further judging whether the turning point is the turning point by presetting a stratum dip angle change threshold value.
Fig. 6 shows a formation turning point marking device in an embodiment of the present invention, which includes:
the seismic profile acquisition module 1 is used for acquiring a seismic profile at the position of a horizontal well section;
the corresponding relation curve drawing module 2 draws and forms a corresponding relation curve of the well track length and the horizon depth according to the horizon depth data in the seismic profile and the seismic line channel number data;
the stratum inclination angle change threshold value determining module 3 is used for determining a stratum inclination angle change threshold value based on the geological requirements of drilling;
and the stratum turning point determining module 4 marks the stratum turning point according to the stratum inclination angle change threshold and the corresponding relation curve.
Based on the same inventive concept, in some embodiments, the formation turning point labeling device further includes:
the smoothing module is used for smoothing the corresponding relation curve;
and the stratum inclination angle change threshold value determining module determines a stratum inclination angle change threshold value according to the smoothness degree of the smoothing processing and the geological requirements of the well drilling.
Based on the same inventive concept, in some embodiments, the formation turning point determining module includes:
the interval dividing unit is used for dividing the corresponding relation curve into a plurality of intervals according to a set interval;
and the first type of stratum turning point is marked according to the slope signs before and after each point in the corresponding relation curve in each interval, and is a point with opposite slope signs of two adjacent points before and after the corresponding relation curve.
Based on the same inventive concept, in some embodiments, the formation turning point determining module includes:
the interval dividing unit is used for dividing the corresponding relation curve into a plurality of intervals according to a set interval;
a second turning point determining unit, which marks a second type of stratum turning point according to the slope change value between two adjacent points in the corresponding relation curve and the stratum dip angle change threshold value in each interval; the slope change value between the second type stratum turning point and the next point adjacent to the second type stratum turning point is larger than the stratum inclination angle change threshold value.
Based on the same inventive concept, in some embodiments, the smoothing module employs a lowess smoothing function to smooth the corresponding relationship curve.
The stratum turning point marking device provided by the invention can be understood that the earthquake section is converted into a corresponding relation curve of well track length and horizon depth with obvious characteristics, the slope of each point can be counted by computer software through the corresponding relation curve, and then whether the turning point is judged by presetting a stratum dip angle change threshold value.
An embodiment of the present invention further provides a specific implementation manner of an electronic device, which is capable of implementing all steps in the method in the foregoing embodiment, and referring to fig. 7, the electronic device specifically includes the following contents:
a processor (processor)601, a memory (memory)602, a communication Interface (Communications Interface)603, and a bus 604;
the processor 601, the memory 602 and the communication interface 603 complete mutual communication through the bus 604;
the processor 601 is used to call the computer program in the memory 602, and when the processor executes the computer program, the processor implements all the steps of the method in the above embodiments.
Embodiments of the present invention also provide a computer-readable storage medium capable of implementing all the steps of the method in the above embodiments, the computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements all the steps of the method in the above embodiments.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the hardware + program class embodiment, since it is substantially similar to the method embodiment, the description is simple, and the relevant points can be referred to the partial description of the method embodiment. Although embodiments of the present description provide method steps as described in embodiments or flowcharts, more or fewer steps may be included based on conventional or non-inventive means. The order of steps recited in the embodiments is merely one manner of performing the steps in a multitude of orders and does not represent the only order of execution. When an actual apparatus or end product executes, it may execute sequentially or in parallel (e.g., parallel processors or multi-threaded environments, or even distributed data processing environments) according to the method shown in the embodiment or the figures. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the presence of additional identical or equivalent elements in a process, method, article, or apparatus that comprises the recited elements is not excluded. For convenience of description, the above devices are described as being divided into various modules by functions, and are described separately. Of course, in implementing the embodiments of the present description, the functions of each module may be implemented in one or more software and/or hardware, or a module implementing the same function may be implemented by a combination of multiple sub-modules or sub-units, and the like. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks. As will be appreciated by one skilled in the art, embodiments of the present description may be provided as a method, system, or computer program product. Accordingly, embodiments of the present description may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present description may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein. The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment. In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the specification. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. The above description is only an example of the embodiments of the present disclosure, and is not intended to limit the embodiments of the present disclosure. Various modifications and variations to the embodiments described herein will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present specification should be included in the scope of the claims of the embodiments of the present specification.
Claims (12)
1. A method for marking a stratum turning point is characterized by comprising the following steps:
acquiring a seismic section at the position of the horizontal well section;
drawing and forming a corresponding relation curve of the well track length and the horizon depth according to the horizon depth data in the seismic profile and the seismic line channel number data;
determining a formation dip change threshold based on geological requirements of the well;
and marking the turning point of the stratum according to the stratum dip angle change threshold and the corresponding relation curve.
2. The method for marking formation turning points according to claim 1, further comprising:
carrying out smoothing treatment on the corresponding relation curve;
the determining a formation dip change threshold based on the geological requirements of the well bore comprises:
and determining a stratum inclination angle change threshold according to the smoothness degree of the smoothing processing and the geological requirements of the well drilling.
3. The method for marking stratum turning points according to claim 1 or 2, wherein the marking stratum turning points according to the stratum dip angle change threshold and the corresponding relation curve comprises:
dividing the corresponding relation curve into a plurality of intervals according to a set interval;
and in each interval, marking a first type stratum turning point according to the slope signs before and after each point in the corresponding relation curve, wherein the first type stratum turning point is a point with opposite slope signs of two adjacent points before and after the corresponding relation curve.
4. The method for marking stratum turning points according to claim 1 or 2, wherein the marking stratum turning points according to the stratum dip angle change threshold and the corresponding relation curve comprises:
dividing the corresponding relation curve into a plurality of intervals according to a set interval;
in each interval, marking a second type of stratum turning point according to a slope change value between two adjacent points in the corresponding relation curve and the stratum dip angle change threshold; the slope change value between the second type stratum turning point and the next point adjacent to the second type stratum turning point is larger than the stratum inclination angle change threshold value.
5. The method for labeling a formation turning point according to claim 2, wherein the smoothing of the correspondence curve comprises:
and smoothing the corresponding relation curve by adopting a lowess smoothing function.
6. A formation turning point marking device, comprising:
the seismic profile acquisition module is used for acquiring a seismic profile at the position of the horizontal well section;
the corresponding relation curve drawing module is used for drawing and forming a corresponding relation curve of the well track length and the horizon depth according to the horizon depth data and the seismic line channel number data in the seismic profile;
the stratum inclination angle change threshold value determining module is used for determining a stratum inclination angle change threshold value based on the geological requirements of the drilling well;
and the stratum turning point determining module marks the stratum turning point according to the stratum inclination angle change threshold and the corresponding relation curve.
7. The formation inflection point labeling apparatus of claim 6, further comprising:
the smoothing module is used for smoothing the corresponding relation curve;
and the stratum inclination angle change threshold value determining module determines a stratum inclination angle change threshold value according to the smoothness degree of the smoothing processing and the geological requirements of the well drilling.
8. The formation turning point labeling apparatus of claim 6 or 7, wherein the formation turning point determining module comprises:
the interval dividing unit is used for dividing the corresponding relation curve into a plurality of intervals according to a set interval;
and the first type of stratum turning point is marked according to the slope signs before and after each point in the corresponding relation curve in each interval, and is a point with opposite slope signs of two adjacent points before and after the corresponding relation curve.
9. The formation turning point labeling apparatus of claim 6 or 7, wherein the formation turning point determining module comprises:
the interval dividing unit is used for dividing the corresponding relation curve into a plurality of intervals according to a set interval;
a second turning point determining unit, which marks a second type of stratum turning point according to the slope change value between two adjacent points in the corresponding relation curve and the stratum dip angle change threshold value in each interval; the slope change value between the second type stratum turning point and the next point adjacent to the second type stratum turning point is larger than the stratum inclination angle change threshold value.
10. The apparatus of claim 7, wherein the smoothing module smoothes the curve of the relationship using a lowess smoothing function.
11. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method of any of claims 1 to 5 when executing the program.
12. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the method of any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010411062.7A CN113673073A (en) | 2020-05-15 | 2020-05-15 | Stratum turning point marking method and device |
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| US20180334896A1 (en) * | 2015-12-30 | 2018-11-22 | Landmark Graphics Corporation | Geosteering based on automated well performance prediction |
| CN110291269A (en) * | 2017-02-13 | 2019-09-27 | 沙特阿拉伯石油公司 | Drill out and operate the well of S-shaped shape |
| RU2720115C1 (en) * | 2018-01-24 | 2020-04-24 | Общество с ограниченной ответственностью "Геонавигационные технологии" | Method of automated geological survey of wells and system for its implementation |
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| US20180334896A1 (en) * | 2015-12-30 | 2018-11-22 | Landmark Graphics Corporation | Geosteering based on automated well performance prediction |
| CN110291269A (en) * | 2017-02-13 | 2019-09-27 | 沙特阿拉伯石油公司 | Drill out and operate the well of S-shaped shape |
| RU2720115C1 (en) * | 2018-01-24 | 2020-04-24 | Общество с ограниченной ответственностью "Геонавигационные технологии" | Method of automated geological survey of wells and system for its implementation |
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