A warning method, device, computer device and storage medium for cable sticking

Abstract

The present invention discloses a warning method, device, computer device and storage medium for cable sticking. The method includes: calculating the standard deviations of the surface cable tension values and the downhole cable tension values respectively, and the covariance between the surface cable tension values and the downhole cable tension values, based on at least two surface cable tension values and at least two downhole cable tension values; calculating the correlation coefficient between the surface cable tension values and the downhole cable tension values according to the standard deviations of the surface cable tension values and the downhole cable tension values, and the covariance between the surface cable tension values and the downhole cable tension values; if it is determined that the warning condition is satisfied according to the correlation coefficient, determining a warning measure matching the correlation coefficient. By using the technical solution of the present invention, accurate identification of cable sticking can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of oil well logging, and particularly to a warning method, device, computer equipment and storage medium for stuck cable. Background Art

[0002] Stuck cable is a common accident in open-hole cable logging operations. The tension of the cable is limited. If the cable cannot be released from the stuck state, only the methods of threading fishing or reverse threading fishing can be adopted, which are time-consuming, laborious and costly. Stuck cable often occurs in fixed-point operations, as well as in the cases of large well deviation and long open hole. In recent years, the proportion of directional wells in open-hole cable logging operations has been increasing, the well deviation has been getting larger, and the open hole has been getting longer, increasing the difficulty of cable operations and making the situation of preventing stuck cable more and more serious.

[0003] In the existing technology for preventing stuck cable, mainly by measuring the cable tension and setting a certain offset for the cable tension, an alarm is given when the offset range is exceeded. However, using the method in the existing technology, it is impossible to accurately identify whether the downhole cable is stuck. After the cable tension exceeds a certain tension threshold, the cable has often been stuck. Summary of the Invention

[0004] The present invention provides a warning method, device, computer equipment and storage medium for stuck cable to achieve accurate identification of the stuck cable situation.

[0005] In a first aspect, an embodiment of the present invention provides a warning method for stuck cable, the method comprising:

[0006] Calculating the standard deviations of the surface cable tension values and the downhole cable tension values, and the covariance between the surface cable tension values and the downhole cable tension values respectively according to at least two surface cable tension values and at least two downhole cable tension values;

[0007] Calculating the correlation coefficient between the surface cable tension values and the downhole cable tension values according to the standard deviations of the surface cable tension values and the downhole cable tension values, and the covariance between the surface cable tension values and the downhole cable tension values;

[0008] If it is determined that the warning condition is satisfied according to the correlation coefficient, determining a warning measure matching the correlation coefficient.

[0009] In a second aspect, an embodiment of the present invention further provides a warning device for stuck cable, the device comprising:

[0010] A standard deviation and covariance calculation module, configured to calculate the standard deviations of the surface cable tension values and the downhole cable tension values, and the covariance between the surface cable tension values and the downhole cable tension values respectively according to at least two surface cable tension values and at least two downhole cable tension values;

[0011] A correlation coefficient calculation module, configured to calculate a correlation coefficient between the surface cable tension value and the downhole cable tension value according to the standard deviations of the surface cable tension value and the downhole cable tension value, and the covariance between the surface cable tension value and the downhole cable tension value;

[0012] An early warning measure determination module, configured to determine an early warning measure matching the correlation coefficient if it is determined according to the correlation coefficient that the early warning condition is satisfied.

[0013] In a third aspect, an embodiment of the present invention further provides a computer device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the early warning method for cable sticking as described in any one of the embodiments of the present invention is implemented.

[0014] In a fourth aspect, an embodiment of the present invention further provides a storage medium storing computer-executable instructions, and the computer-executable instructions are used to execute the early warning method for cable sticking as described in any one of the embodiments of the present invention when executed by a computer processor.

[0015] The technical solution of the embodiment of the present invention obtains at least two surface cable tension values and at least two downhole cable tension values, calculates the standard deviation of the surface cable tension value, the standard deviation of the downhole cable tension value, and the covariance between the surface cable tension value and the downhole cable tension value, and calculates the correlation coefficient between the surface cable tension value and the downhole cable tension value according to the two standard deviations and the covariance. When the correlation coefficient meets the early warning condition, an early warning measure matching the correlation coefficient is taken. It solves the problem that in the prior art, the method of warning about cable sticking based on the numerical value of the cable tension cannot accurately identify whether the downhole cable is stuck, and realizes the accurate identification of the cable sticking situation.

[0016] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1a is a flowchart of an early warning method for cable sticking provided by Embodiment 1 of the present invention;

[0019] Figure 1b It is a schematic diagram for measuring the tension value of surface cable and the tension value of downhole cable provided by Embodiment 1 of the present invention;

[0020] Figure 2 It is a flowchart of a warning method for cable sticking provided by Embodiment 2 of the present invention;

[0021] Figure 3 It is a schematic structural diagram of a warning device for cable sticking provided by Embodiment 3 of the present invention;

[0022] Figure 4 It is a schematic structural diagram of a computer device provided by Embodiment 4 of the present invention. Detailed implementation manners

[0023] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0025] Embodiment 1

[0026] Figure 1a A flowchart of a warning method for cable sticking is provided for Embodiment 1 of the present invention. This embodiment is applicable to the situation of pre-identifying cable sticking in open-hole cable logging operations. This method can be executed by a warning device for cable sticking, which can be implemented in the form of hardware and / or software, and can be configured in a computer device and used in cooperation with a tension sensor and a cable control device, etc.

[0027] As Figure 1a shown, the method includes:

[0028] S110. Calculate the standard deviation of the surface cable tension value and the downhole cable tension value, and the covariance between the surface cable tension value and the downhole cable tension value, respectively, based on at least two surface cable tension values and at least two downhole cable tension values.

[0029] The surface cable tension value is the tension value of the surface part of the cable, which can be measured by the tension sensor set on the surface cable. The downhole cable tension value is the tension value of the downhole part of the cable, which can be measured by the tension sensor set on the downhole equipment. Figure 1b A measurement schematic diagram of the surface cable tension value and the downhole cable tension value is provided. As Figure 1b shown, the surface cable tension value is measured by the tension sensor set on the cable pulley, and the downhole cable tension value is measured by the tension sensor set at the downhole equipment.

[0030] Based on at least two surface cable tension values, calculate the standard deviation of the surface cable tension value. Specifically, first calculate the average value of at least two surface cable tension values. Denote at least two surface cable tension values as X 1 、X 2 …X N , where N is the number of surface cable tension values. Then the average value M X =(X 1 +X 2 +…X N ) / N. The variance of the surface cable tension value The standard deviation of the surface cable tension value

[0031] Similarly, based on at least two downhole cable tension values, calculate the standard deviation of the downhole cable tension value. Specifically, denote at least two downhole cable tension values as Y 1 、Y 2 …Y N , where N is the number of downhole cable tension values, and the number of downhole cable tension values is the same as that of the surface cable tension values. The average value M of the downhole cable tension value Y =(Y 1 +Y 2 +…Y N ) / N. The variance of the downhole cable tension value The standard deviation of the downhole cable tension value

[0032] Based on at least two surface cable tension values and at least two downhole cable tension values, calculate the covariance between the surface cable tension value and the downhole cable tension value. Specifically, based on at least two surface cable tension values as X 1 、X 2 …XN , calculate the average value M of the surface cable tension value X , according to at least two downhole cable tension values of Y 1 , Y 2 …Y N , calculate the average value M of the downhole cable tension value Y . Calculate the covariance between the surface cable tension value and the downhole cable tension value

[0033] S120. According to the standard deviations of the surface cable tension value and the downhole cable tension value, and the covariance between the surface cable tension value and the downhole cable tension value, calculate the correlation coefficient between the surface cable tension value and the downhole cable tension value.

[0034] The correlation coefficient is used to represent the synchronization between the surface cable tension value and the downhole cable tension value. When the synchronization between the surface cable tension value and the downhole cable tension value is good, only the cable needs to be processed according to the normal operation requirements. When the synchronization between the surface cable tension value and the downhole cable tension value is poor, it indicates that the cable is prone to sticking and jamming, and at this time, a warning for cable sticking and jamming needs to be given.

[0035] In the embodiment of the present invention, the correlation coefficient is calculated through the standard deviations of the surface cable tension value and the downhole cable tension value, and the covariance between the surface cable tension value and the downhole cable tension value. Such a setting can make the identification of the synchronization between the surface cable tension value and the downhole cable tension value more regular, and the identified synchronization result is more accurate, so as to accurately pre-identify cable sticking and jamming.

[0036] S130. If it is determined that the warning condition is satisfied according to the correlation coefficient, determine the warning measure matching the correlation coefficient.

[0037] Determining that the correlation coefficient satisfies the warning condition can be that the value of the correlation coefficient is within a preset value range. The historical correlation coefficient in each historical open-hole cable logging operation can be calculated according to the historical surface cable tension value and the historical downhole cable tension value in the historical open-hole cable logging operation, and the value range can be determined according to the cable sticking and jamming situation of each historical open-hole cable logging operation. However, the present embodiment does not limit the value range and the way of presetting the value range.

[0038] In the embodiments of the present invention, due to different values of the correlation coefficient, the synchronization between the ground cable tension value and the downhole cable tension value is different, and the sticking degree of the cable is different. Therefore, multiple numerical intervals can be set, and different warning measures can be set in advance for different numerical intervals. After determining that the correlation coefficient meets the warning condition, the matching warning measure is determined according to the numerical interval corresponding to the correlation coefficient. Different rescue measures are taken according to different sticking degrees of the cable, which can avoid the cable sticking phenomenon to the greatest extent.

[0039] The technical solution of the embodiments of the present invention calculates the standard deviation of the ground cable tension value, the standard deviation of the downhole cable tension value, and the covariance between the ground cable tension value and the downhole cable tension value by obtaining at least two ground cable tension values and at least two downhole cable tension values, and calculates the correlation coefficient between the ground cable tension value and the downhole cable tension value according to the two standard deviations and the covariance. When the correlation coefficient meets the warning condition, a warning measure matching the correlation coefficient is taken. It solves the problem that the prior art cannot accurately identify whether the downhole cable is stuck by warning the cable sticking according to the numerical value of the cable tension, and realizes the accurate identification of the cable sticking situation.

[0040] Embodiment 2

[0041] Figure 2 It is a flowchart of a warning method for cable sticking provided by Embodiment 2 of the present invention. On the basis of the above embodiments, the present invention further specifies the process of calculating the correlation coefficient between the ground cable tension value and the downhole cable tension value, the process of judging whether the correlation coefficient meets the condition, and the process of determining the warning measure matching the correlation coefficient, and adds the process of performing low-pass filtering on the ground cable tension value and the downhole cable tension value to generate a ground cable tension value curve and a downhole cable tension value curve, and obtaining at least two ground cable tension values and at least two downhole cable tension values according to the ground cable tension value curve and the downhole cable tension value curve.

[0042] As Figure 2 shown, the method includes:

[0043] S210. Obtain the ground cable tension value and the downhole cable tension value corresponding to different depths.

[0044] In this embodiment, depth data is obtained, and the ground cable tension value and the downhole cable tension value corresponding to different depths are recorded. The purpose of obtaining the depth data is to refer to the tension change at different depths and prevent errors caused by the cable tension change when the depth remains unchanged.

[0045] S220. Perform low-pass filtering on each surface cable tension value and each downhole cable tension value respectively to obtain a surface cable tension value curve and a downhole cable tension value curve.

[0046] Low-pass filtering is a filtering method. The rule is that low-frequency signals can pass through normally, while high-frequency signals exceeding the set critical value are blocked and attenuated, and the degree of blocking and attenuation will change according to different frequencies and different filtering purposes. In the embodiment of the present invention, performing low-pass filtering on multiple collected surface cable tension values can be to reduce the surface cable tension values exceeding the preset threshold, and update the values of the surface cable tension values exceeding the preset threshold to the preset threshold. According to the multiple surface cable tension values after low-pass filtering, a surface cable tension value curve is generated. Similarly, perform low-pass filtering on multiple collected downhole cable tension values, reduce the downhole cable tension values exceeding the preset threshold, and update the values of the downhole cable tension values exceeding the preset threshold to the preset threshold. According to the multiple downhole cable tension values after low-pass filtering, a downhole cable tension value curve is generated.

[0047] In the embodiment of the present invention, performing low-pass filtering on multiple collected surface cable tension values and downhole cable tension values avoids the influence of measurement errors on the recognition result and improves the accuracy of cable sticking recognition.

[0048] S230. According to the depth sampling interval and the surface cable tension value curve, obtain at least two surface cable tension values.

[0049] Take values on the surface cable tension value curve. Starting from the origin of the surface cable tension value curve, take a value of a surface cable tension value every depth sampling interval to obtain multiple surface cable tension values.

[0050] S240. According to the depth sampling interval and the downhole cable tension value curve, obtain at least two downhole cable tension values.

[0051] Similarly, take values on the downhole cable tension value curve. Starting from the origin of the downhole cable tension value curve, take a value of a downhole cable tension value every depth sampling interval to obtain multiple downhole cable tension values.

[0052] It should be noted that in this embodiment, performing low-pass filtering on each obtained cable tension to generate a cable tension curve and taking cable tension values on the cable tension curve is only an implementation method of cable tension value taking in this embodiment. It is also possible to directly process each obtained cable tension, update the cable tension exceeding the preset threshold to the preset threshold, and directly calculate the standard deviation according to each processed cable tension. This embodiment does not limit the method of obtaining multiple surface cable tension values and multiple downhole cable tension values.

[0053] S250. Calculate the standard deviation of the surface cable tension values based on at least two surface cable tension values.

[0054] S260. Calculate the standard deviation of the downhole cable tension values based on at least two downhole cable tension values.

[0055] The method for calculating the standard deviation has been described in the above embodiments, and will not be elaborated herein.

[0056] S270. Calculate the covariance between the surface cable tension values and the downhole cable tension values.

[0057] Similarly, the method for calculating the covariance has been described in the above embodiments, and will not be elaborated herein.

[0058] S280. Calculate the product of the standard deviation of the surface cable tension values and the standard deviation of the downhole cable tension values.

[0059] S290. Use the value obtained by dividing the covariance by the product of the standard deviations as the correlation coefficient between the surface cable tension values and the downhole cable tension values.

[0060] Specifically, the correlation coefficient between the surface cable tension values and the downhole cable tension values is calculated by the following formula:

[0061] S2100. Determine whether the correlation coefficient is less than or equal to the first correlation coefficient threshold. If so, execute S2110; otherwise, return to execute S210.

[0062] Optionally, the historical surface cable tension values, historical downhole cable tension values, and cable status of historical open-hole wireline logging operations can be analyzed in advance to determine the critical values of the correlation coefficient when the cable is in a free state without sticking, when the cable is stuck but measures such as releasing the stuck can be taken, and when the cable is completely stuck and only fishing can be carried out.

[0063] Preferably, the first correlation coefficient threshold is 0.9.

[0064] That is, when the correlation coefficient is greater than 0.9, the cable is in a free state, and at this time, the cable can be moved within the established range and frequency that meet the safety operation requirements. When the correlation coefficient is less than or equal to 0.9, the cable has a risk of sticking, and sticking warning measures need to be taken.

[0065] S2110. Determine whether the correlation coefficient is greater than the second correlation coefficient threshold. If so, execute S2120; otherwise, execute S2130.

[0066] The second correlation coefficient threshold is the critical value when the cable is stuck but measures such as releasing the stuck can be taken. Preferably, the second correlation coefficient threshold is 0.6.

[0067] S2120. Adjust the movement amplitude and frequency of the cable. Return to execute S210.

[0068] When the correlation coefficient is less than or equal to the first correlation coefficient threshold but greater than the second correlation coefficient threshold, the situation of the cable being stuck can be solved by increasing the movement frequency and amplitude of the cable to restore the free state of the cable.

[0069] S2130. Perform stuck cable release treatment on the cable. Return to execute S210.

[0070] When the correlation coefficient is less than the second correlation coefficient threshold, the cable faces the risk of being completely stuck and unable to be released. At this time, stuck cable release measures need to be taken, such as unsealing the downhole instrument or retracting the push arm, etc., and pulling the cable with the maximum safe tension to avoid the situation of the cable being stuck.

[0071] Embodiment III

[0072] Figure 3 It is a schematic structural diagram of a warning device for cable sticking provided by Embodiment III of the present invention. As Figure 3 shown, the device includes: a standard deviation and covariance calculation module 310, a correlation coefficient calculation module 320, and a warning measure determination module 330. Among them:

[0073] The standard deviation and covariance calculation module 310 is used to calculate the standard deviation of the surface cable tension value and the downhole cable tension value, and the covariance between the surface cable tension value and the downhole cable tension value respectively according to at least two surface cable tension values and at least two downhole cable tension values;

[0074] The correlation coefficient calculation module 320 is used to calculate the correlation coefficient between the surface cable tension value and the downhole cable tension value according to the standard deviation of the surface cable tension value and the downhole cable tension value, and the covariance between the surface cable tension value and the downhole cable tension value;

[0075] The warning measure determination module 330 is used to determine a warning measure matching the correlation coefficient if it is determined that the warning condition is met according to the correlation coefficient.

[0076] In the technical solution of the embodiment of the present invention, by obtaining at least two surface cable tension values and at least two downhole cable tension values, calculating the standard deviation of the surface cable tension values, the standard deviation of the downhole cable tension values, and the covariance between the surface cable tension values and the downhole cable tension values, calculating the correlation coefficient between the surface cable tension values and the downhole cable tension values according to the two standard deviations and the covariance, and taking a warning measure matching the correlation coefficient when the correlation coefficient meets the warning condition. It solves the problem that in the prior art, the method of warning against cable sticking according to the numerical size of the cable tension cannot accurately identify whether the downhole cable is stuck, and realizes the accurate identification of the cable sticking situation.

[0077] Based on the above embodiment, the device further includes:

[0078] A tension value acquisition module, configured to acquire the surface cable tension values and downhole cable tension values corresponding to different depths;

[0079] A low-pass filtering processing module, configured to perform low-pass filtering processing on each surface cable tension value and each downhole cable tension value respectively to obtain a surface cable tension value curve and a downhole cable tension value curve.

[0080] Based on the above embodiment, the standard deviation and covariance calculation module 310 includes:

[0081] A surface cable tension value acquisition unit, configured to acquire at least two surface cable tension values according to the depth sampling interval and the surface cable tension value curve;

[0082] A downhole cable tension value acquisition unit, configured to acquire at least two downhole cable tension values according to the depth sampling interval and the downhole cable tension value curve;

[0083] A surface cable tension value standard deviation calculation unit, configured to calculate the standard deviation of the surface cable tension values according to at least two surface cable tension values;

[0084] A downhole cable tension value standard deviation calculation unit, configured to calculate the standard deviation of the downhole cable tension values according to at least two downhole cable tension values.

[0085] Based on the above embodiment, the correlation coefficient calculation module 320 includes:

[0086] A standard deviation product calculation unit, configured to calculate the standard deviation product of the standard deviation of the surface cable tension values and the standard deviation of the downhole cable tension values;

[0087] A correlation coefficient calculation unit, configured to use the value obtained by dividing the covariance by the standard deviation product as the correlation coefficient between the surface cable tension values and the downhole cable tension values.

[0088] Based on the above embodiments, the early warning measure determination module 330 includes:

[0089] An early warning condition judgment unit, configured to determine that the early warning condition is satisfied if it is determined that the correlation coefficient is less than or equal to the first correlation coefficient threshold.

[0090] Based on the above embodiments, the early warning measure determination module 330 includes:

[0091] A cable adjustment unit, configured to adjust the movement amplitude and movement frequency of the cable if it is determined that the correlation coefficient is less than or equal to the first correlation coefficient threshold and greater than the second correlation coefficient threshold;

[0092] A cable unjamming unit, configured to perform unjamming processing on the cable if it is determined that the correlation coefficient is less than or equal to the second correlation coefficient threshold.

[0093] Based on the above embodiments, the first correlation coefficient threshold is 0.9, and the second correlation coefficient threshold is 0.6.

[0094] The early warning device for cable sticking provided by the embodiments of the present invention can execute the early warning method for cable sticking provided by any embodiment of the present invention, and has corresponding functional modules and beneficial effects for executing the method.

[0095] Embodiment 4

[0096] Figure 4 It is a schematic structural diagram of a computer device provided by Embodiment 4 of the present invention. As Figure 4 shown, the computer device includes a processor 70, a memory 71, an input device 72, and an output device 73; the number of processors 70 in the computer device can be one or more, Figure 4 taking one processor 70 as an example; the processor 70, the memory 71, the input device 72, and the output device 73 in the computer device can be connected through a bus or other means, Figure 4 taking the connection through the bus as an example.

[0097] The memory 71, as a computer-readable storage medium, can be used to store software programs, computer-executable programs, and modules, such as the modules corresponding to the early warning method for cable sticking in the embodiments of the present invention (for example, the standard deviation and covariance calculation module 310, the correlation coefficient calculation module 320, and the early warning measure determination module 330 in the early warning device for cable sticking). The processor 70 executes various functional applications and data processing of the computer device by running the software programs, instructions, and modules stored in the memory 71, that is, implements the above-mentioned early warning method for cable sticking. The method includes:

[0098] Calculate the standard deviations of the surface cable tension values and the downhole cable tension values, respectively, and the covariance between the surface cable tension values and the downhole cable tension values, based on at least two surface cable tension values and at least two downhole cable tension values;

[0099] Calculate the correlation coefficient between the surface cable tension values and the downhole cable tension values, based on the standard deviations of the surface cable tension values and the downhole cable tension values, and the covariance between the surface cable tension values and the downhole cable tension values;

[0100] If it is determined that the warning condition is met according to the correlation coefficient, determine the warning measure matching the correlation coefficient.

[0101] The memory 71 may mainly include a program storage area and a data storage area. Among them, the program storage area may store an operating system and application programs required for at least one function; the data storage area may store data created according to the use of the terminal, etc. In addition, the memory 71 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices. In some instances, the memory 71 may further include a memory remotely set relative to the processor 70, and these remote memories may be connected to the computer device through a network. Examples of the above network include but are not limited to the Internet, an enterprise intranet, a local area network, a mobile communication network, and combinations thereof.

[0102] The input device 72 may be used to receive input digital or character information, and generate key signal inputs related to the user settings and function controls of the computer device. The output device 73 may include a display device such as a display screen.

[0103] Embodiment Five

[0104] Embodiment Five of the present invention further provides a storage medium containing computer-executable instructions, and the computer-executable instructions are used to execute a warning method for cable sticking when executed by a computer processor. The method includes:

[0105] Calculate the standard deviations of the surface cable tension values and the downhole cable tension values, respectively, and the covariance between the surface cable tension values and the downhole cable tension values, based on at least two surface cable tension values and at least two downhole cable tension values;

[0106] Calculate the correlation coefficient between the surface cable tension values and the downhole cable tension values, based on the standard deviations of the surface cable tension values and the downhole cable tension values, and the covariance between the surface cable tension values and the downhole cable tension values;

[0107] If it is determined that the warning condition is met according to the correlation coefficient, determine the warning measure matching the correlation coefficient.

[0108] Certainly, for a storage medium containing computer-executable instructions provided by an embodiment of the present invention, the computer-executable instructions are not limited to the method operations described above, and can also execute relevant operations in the early warning method for cable sticking provided by any embodiment of the present invention.

[0109] From the above description of the embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software and necessary general hardware. Of course, it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as a floppy disk, read-only memory (ROM), random access memory (RAM), flash memory (FLASH), hard disk or optical disc of a computer, etc., including several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in various embodiments of the present invention.

[0110] It should be noted that in the embodiments of the above-mentioned early warning device for cable sticking, the various units and modules included are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be achieved; in addition, the specific names of the functional units are only for the convenience of mutual distinction and do not limit the protection scope of the present invention.

[0111] Note that the above is only the preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein. Various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, it can also include more other equivalent embodiments, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A warning method for cable sticking Characterized in that It includes According to at least two surface cable tension values and at least two downhole cable tension values, calculate the standard deviation of the surface cable tension value and the downhole cable tension value respectively, and the covariance between the surface cable tension value and the downhole cable tension value; According to the standard deviation of the surface cable tension value and the downhole cable tension value, and the covariance between the surface cable tension value and the downhole cable tension value, calculate the correlation coefficient between the surface cable tension value and the downhole cable tension value, including Calculate the product of the standard deviation of the surface cable tension value and the standard deviation of the downhole cable tension value; The value obtained by dividing the covariance by the product of the standard deviations is used as the correlation coefficient between the surface cable tension value and the downhole cable tension value; If it is determined that the warning condition is met according to the correlation coefficient, determine the warning measure matching the correlation coefficient; Among them, determining that the warning condition is met according to the correlation coefficient includes If it is determined that the correlation coefficient is less than or equal to the first correlation coefficient threshold, it is determined that the warning condition is met.

2. The method according to claim 1 Characterized in that Before calculating the standard deviation of the surface cable tension value and the downhole cable tension value respectively according to at least two surface cable tension values and at least two downhole cable tension values, it further includes Obtain the surface cable tension value and the downhole cable tension value corresponding to different depths; Perform low-pass filtering processing on each surface cable tension value and each downhole cable tension value respectively to obtain the surface cable tension value curve and the downhole cable tension value curve.

3. The method according to claim 2 Characterized in that Calculating the standard deviation of the surface cable tension value and the downhole cable tension value respectively according to at least two surface cable tension values and at least two downhole cable tension values includes According to the depth sampling interval and the surface cable tension value curve, obtain at least two surface cable tension values; According to the depth sampling interval and the downhole cable tension value curve, obtain at least two downhole cable tension values; According to at least two surface cable tension values, calculate the standard deviation of the surface cable tension value; According to at least two downhole cable tension values, calculate the standard deviation of the downhole cable tension value.

4. The method according to claim 1 Characterized in that Determining the warning measure matching the correlation coefficient includes If it is determined that the correlation coefficient is less than or equal to the first correlation coefficient threshold and greater than the second correlation coefficient threshold, adjust the movement amplitude and movement frequency of the cable; If it is determined that the correlation coefficient is less than or equal to the second correlation coefficient threshold, perform a sticking release treatment on the cable.

5. The method according to claim 4 Characterized in that The first correlation coefficient threshold is 0.9, and the second correlation coefficient threshold is 0.

6.

6. A warning device for cable sticking Characterized in that It includes A standard deviation and covariance calculation module, which is used to calculate the standard deviation of the surface cable tension value and the downhole cable tension value respectively according to at least two surface cable tension values and at least two downhole cable tension values, and the covariance between the surface cable tension value and the downhole cable tension value; A correlation coefficient calculation module, configured to calculate a correlation coefficient between a surface cable tension value and a downhole cable tension value according to the standard deviations of the surface cable tension value and the downhole cable tension value, and the covariance between the surface cable tension value and the downhole cable tension value; The correlation coefficient calculation module includes: A standard deviation product calculation unit, configured to calculate the product of the standard deviations of the standard deviation of the surface cable tension value and the standard deviation of the downhole cable tension value; A correlation coefficient calculation unit, configured to use the value obtained by dividing the covariance by the standard deviation product as the correlation coefficient between the surface cable tension value and the downhole cable tension value; An early warning measure determination module, configured to determine an early warning measure matching the correlation coefficient if it is determined that the early warning condition is satisfied according to the correlation coefficient; The early warning measure determination module includes: An early warning condition judgment unit, configured to determine that the early warning condition is satisfied if it is determined that the correlation coefficient is less than or equal to a first correlation coefficient threshold.

7. A computer device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein, when the processor executes the computer program, the early warning method for cable sticking as described in any one of claims 1-5 is implemented.

8. A storage medium storing computer-executable instructions, wherein, the computer-executable instructions are used to execute the early warning method for cable sticking as described in any one of claims 1-5 when executed by a computer processor.

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