Formation gap blocking method, device and equipment, storage medium and product

Abstract

The invention provides a stratum gap plugging method, device and equipment, a storage medium and a product, and the method comprises the steps: determining a gap region in response to detection of a gap in a stratum; calculating the adding mass of the plugging substance; the plugging substance is a substance capable of flexibly expanding along with temperature rise; the initial expansion temperature of the plugging material is greater than or equal to the highest temperature of the shaft; the shaft bears drilling fluid, and the plugging substance with the added mass is uniformly distributed in the drilling fluid; and the temperature of the gap area is controlled to rise, so that the plugging substance with the added mass is subjected to flexible expansion to plug the stratum gap. The plugging substance is a flexible plugging substance, and after the temperature rises, the plugging substance expands in the stratum gap, so that the plugging substance can be better filled in the stratum gap, and the plugging effect can be improved.

Description

Technical Field

[0001] The present application relates to the field of industrial safety, and in particular to a method, device, equipment, storage medium and product for sealing formation gaps. Background Art

[0002] The exploration scale of deep oil and gas and unconventional oil and gas resources is increasing day by day. However, deep and unconventional formations are generally developed with cracks. During the wellbore drilling process, a large amount of drilling fluid will enter the formation through the cracks, causing well leakage. After the well leakage occurs, the liquid level in the wellbore decreases, resulting in a decrease in the pressure of the liquid column. Not only will a large amount of drilling fluid be consumed, increasing the drilling cycle, but if not handled in time, it may also cause a series of complex situations such as well collapse and drill stuck. It is also the main inducing factor for well control safety accidents.

[0003] At present, various types of plugging materials such as bridging type, polymer gel type, liquid absorption and swelling type, and sac fluid type have been developed on the market. The plugging materials are transported through the wellbore to the formation cracks, thereby achieving the plugging of the formation cracks by the plugging materials.

[0004] However, when the above-mentioned plugging materials are used for plugging, the solidified particle size of the plugging materials used is difficult to match the gap size, which reduces the filling rate and weakens the plugging effect. Summary of the invention

[0005] The present application provides a method, device, equipment, storage medium and product for plugging formation fissures, which are used to solve the problems in the prior art of low matching rate between plugging materials and fissure scales and poor plugging effect.

[0006] In a first aspect, the present application provides a method for plugging a formation crack, the method comprising:

[0007] In response to detecting a fracture in the formation, determining a fracture area;

[0008] The added mass of the plugging material is calculated; the plugging material is a material that can flexibly expand in volume as the temperature rises; the initial expansion temperature of the plugging material is greater than or equal to the highest temperature of the wellbore; the wellbore carries drilling fluid, and the added mass of the plugging material is evenly distributed in the drilling fluid;

[0009] The temperature rise of the crack area is controlled so that the added mass of the plugging material can flexibly expand and plug the formation cracks.

[0010] In one embodiment, in response to detecting a crack in the formation, determining the crack area includes:

[0011] Control the noise meter to fall from the wellhead, and receive the noise data collected by the noise meter at the formation depth during the falling process;

[0012] In response to noise data received at a first depth of the formation exceeding a preset gap threshold, determining the first depth of the formation as a start depth of a gap in the formation;

[0013] Continue to control the noise meter to fall, and in response to the noise data received at the second depth of the formation continuously exceeding the preset gap threshold to being less than or equal to the preset gap threshold, determine that the second depth of the formation is the end depth of the formation gap; between the start depth and the end depth of the formation gap, the noise data collected by the noise meter all exceed the preset gap threshold;

[0014] A fracture area is determined based on the start depth and the end depth of the formation fracture.

[0015] In one embodiment, the determining of the fracture area based on the start depth and the end depth of the formation fracture comprises:

[0016] Calculating the difference between the end depth and the start depth, and determining the difference as the gap depth;

[0017] The gap area is determined based on the gap depth.

[0018] In one embodiment, determining the gap area based on the gap depth includes:

[0019] determining the stratum region covered by the fracture depth as the fracture region; and / or,

[0020] The stratum region included in the crack depth and the regions preset above and below the stratum region are determined as the crack region.

[0021] In one embodiment, the calculation of the added mass of the plugging material includes:

[0022] Obtaining a relationship table between the volume expansion rate and temperature corresponding to the plugging material;

[0023] Obtaining a preset target temperature for volume expansion of the plugging material;

[0024] Determining the volume expansion rate corresponding to the target temperature from the relationship table;

[0025] The added mass of the plugging material is calculated based on the volume expansion rate.

[0026] In one embodiment, the calculating the added mass of the plugging material based on the volume expansion rate includes:

[0027] Obtain the volume of drilling fluid;

[0028] The ratio of the volume of the drilling fluid to the volume expansion rate is calculated as the added mass of the plugging material.

[0029] In one embodiment, controlling the temperature rise of the crack region so that the added mass of plugging material flexibly expands to plug the formation cracks includes:

[0030] Controlling the heating unit prepared for the gap area to fall into the gap area;

[0031] The heating unit is controlled to heat the crack region to a target temperature of the plugging material, so that the plugging material with added mass can flexibly expand and plug the formation cracks.

[0032] In a second aspect, the present application provides a formation crack plugging device, the formation crack plugging device comprising:

[0033] A determination module, configured to determine a crack area in response to detecting a crack in the formation;

[0034] A calculation module is used to calculate the added mass of the plugging material; the plugging material is a material that can flexibly expand in volume as the temperature rises; the initial expansion temperature of the plugging material is greater than or equal to the highest temperature of the wellbore; the wellbore carries drilling fluid, and the added mass of the plugging material is evenly distributed in the drilling fluid;

[0035] The control module is used to control the temperature rise of the gap area so that the added mass of the plugging material can flexibly expand and plug the formation gap.

[0036] In a third aspect, the present application provides an electronic device, comprising: a processor, and a memory communicatively connected to the processor;

[0037] The memory stores computer-executable instructions;

[0038] The processor executes the computer-executable instructions stored in the memory to implement the method as described in the first aspect or any one of the above-mentioned methods.

[0039] In a fourth aspect, the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, they are used for the method described in any one of the above-mentioned first aspects.

[0040] In a fifth aspect, the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the method as described in any one of the above-mentioned first aspects.

[0041] The present application provides a method, device, equipment, storage medium and product for plugging formation cracks. In the present application, an electronic device for formation cracks (hereinafter referred to as the electronic device) determines the crack area in response to detecting a crack in the formation, and then calculates the added mass of the plugging material. The plugging material is a material that flexibly expands in volume at high temperature, and the initial expansion temperature of the plugging material is greater than or equal to the highest temperature of the wellbore. The wellbore carries drilling fluid, and the above-mentioned added mass of the plugging material is evenly distributed in the drilling fluid. Further, the electronic device controls the temperature rise of the crack area so that the added mass of the plugging material expands flexibly, thereby plugging the cracks in the formation. The plugging material in the present application is a flexible plugging material. After the temperature rises, the plugging material will expand in the formation cracks, so that it can be better filled in the formation cracks, so the plugging effect can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0043] Figure 1 This is an application scenario diagram of a formation fracture plugging method provided in this application;

[0044] Figure 2 A schematic flow chart of a method for plugging a formation crack provided in Example 1;

[0045] Figure 3 A schematic flow chart of a method for plugging formation cracks provided in Example 2;

[0046] Figure 4 A schematic flow chart of a method for plugging formation cracks provided in Example 5;

[0047] Figure 5 A schematic diagram of a formation gap provided in Example 8;

[0048] Figure 6 A schematic diagram of a blocking method provided in Example 8;

[0049] Figure 7 A schematic diagram of the structure of a formation fracture plugging device provided in Example 9;

[0050] Figure 8 A schematic diagram of the structure of an electronic device provided in Example 10.

[0051] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0052] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0053] At present, various types of plugging materials such as bridging, polymer gel, liquid absorption and swelling, and sac fluid have been developed successively at home and abroad. The plugging materials are transported through the wellbore to the formation cracks, so that the plugging materials can plug the formation cracks.

[0054] However, when the above-mentioned plugging materials are used for plugging, the solidified particle size of the plugging materials used is difficult to match the gap size, which reduces the filling rate and weakens the plugging effect.

[0055] In order to solve the defects of the prior art, the inventor of this scheme has designed a new scheme after creative research. This scheme provides a method for sealing formation cracks. In order to solve the problem of poor sealing effect in the prior art, the electronic device of this scheme responds to the detection of cracks in the formation, determines the corresponding crack area, and then calculates the added mass of the sealing material, so that the wellbore can be evenly distributed with the above-mentioned added mass of the sealing material, and then controls the temperature rise of the crack area. At this time, the sealing material in the crack area will flexibly expand with the increase of temperature. At this time, the formation cracks can be blocked after the volume expansion. Since the sealing material in this scheme is a flexible sealing material, it is like an irregular sealing material such as foam after expansion, so it can better match the scale of the formation cracks, so the filling effect is improved. The sealing material in this scheme is a material that expands with the increase of temperature, so only the temperature needs to be controlled to achieve the control of the volume of the sealing material, which is convenient for implementation in actual scenarios.

[0056] The following is an introduction to the application scenarios of a formation fracture sealing method, device, equipment, storage medium and product provided by the present application.

[0057] Figure 1 This is an application scenario diagram of a method for plugging formation gaps provided in this application. Figure 1 As shown, the application scenario diagram includes an electronic device 101 and a heating unit 102 , a formation 103 and a wellbore 104 .

[0058] The electronic device 101 may be any device with computing functions, such as a mobile phone or a computer, and is not limited here.

[0059] The heating unit 102 can generate heat. The heating unit is located in the wellbore 104.

[0060] Specifically, in response to detecting a crack in the stratum, the electronic device 101 determines a crack area.

[0061] Furthermore, the electronic device 101 calculates the added mass of the plugging material, so that the user can evenly distribute the added mass of the plugging material in the drilling fluid, which is located in the wellbore 104 .

[0062] In this scenario, the stratum 103 includes stratum fractures.

[0063] Furthermore, the electronic device 101 can control the heating unit 102 to drop to the gap area, and then the electronic device 101 controls the heating unit 102 to generate heat. At this time, the sealing material in the formation gap expands flexibly as the temperature rises, thereby filling the formation gap.

[0064] The heating unit 102 may be prepared based on the gap region.

[0065] The present application provides a method for sealing formation fissures, aiming to solve the above technical problems in the prior art.

[0066] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0067] Embodiment 1

[0068] The execution subject of Embodiments 1 to 8 of the present application is the plugging of formation gaps, and the plugging of formation gaps (referred to as the plugging device) is located in the electronic device.

[0069] Figure 2 A schematic flow chart of a method for plugging formation fractures provided in Example 1. Figure 2 As shown, specifically including:

[0070] S201, in response to detecting a crack in the formation, determining a crack area.

[0071] In one embodiment, the electronic device may detect that there are cracks in the ground formation based on a crack prompt input by the user.

[0072] In one approach, electronic equipment can detect cracks in the formation through noise data from a noise meter.

[0073] The fracture area refers to the area with fractures in the stratum.

[0074] S202, calculating the added mass of the plugging material; the plugging material is a material that can flexibly expand in volume as the temperature rises; the initial expansion temperature of the plugging material is greater than or equal to the highest temperature of the wellbore; the wellbore carries the drilling fluid, and the added mass of the plugging material is evenly distributed in the drilling fluid.

[0075] Among them, the added mass refers to the mass of the plugging material added into the drilling fluid.

[0076] In this case, the volume of the wellbore can be known in advance.

[0077] Specifically, after the electronic device calculates the added mass of the plugging material, the user can evenly add the added mass of the plugging material to the drilling fluid, stir it evenly, and then add the drilling fluid with evenly distributed plugging material to the wellbore.

[0078] Among them, the blocking material is a material that can be flexibly encapsulated in volume as the temperature rises. Therefore, when the temperature rises, if the blocking material reaches the starting expansion temperature, it begins to expand in volume. If the temperature continues to rise, the blocking material will continue to expand.

[0079] It should be noted that the plugging material will not continue to expand after reaching the final expansion temperature (ie, the maximum expansion temperature).

[0080] It should be noted that the plugging material undergoes flexible expansion like an irregular substance, such as foam.

[0081] It should be noted that in order to ensure that the plugging material does not expand after being added to the wellbore, the initial expansion temperature of the plugging material selected in this application is greater than or equal to the highest temperature of the wellbore. The initial expansion temperature refers to the lowest temperature at which the plugging material expands.

[0082] It is understandable that if the initial expansion temperature of the plugging material is greater than or higher than the highest temperature of the wellbore, no expansion will occur when the plugging material is added to the wellbore.

[0083] It should be noted that the plugging material in the present application may be expanded graphite or other materials, which are not limited here.

[0084] It should be noted that the temperature of the wellbore will change with the depth of the formation, so the temperature of the wellbore is not fixed.

[0085] It can be understood that in order to enable the sealing material to expand better and fill the formation cracks, the sealing material in the present application is evenly distributed in the drilling fluid. There will not be a situation where there is more sealing material in some places and less sealing material in others, thus avoiding the situation where the formation cracks cannot be completely filled due to insufficient sealing material.

[0086] S203, controlling the temperature rise in the crack area to allow the added mass of the plugging material to flexibly expand and plug the formation cracks.

[0087] In one embodiment, a user may drop a corresponding heating unit into the gap area, wherein the heating unit is communicatively connected with the electronic device.

[0088] Furthermore, the electronic device controls the heating unit to generate heat in the gap area, so that the temperature of the gap area rises, and then the temperature of the drilling fluid in the gap area also rises, so that the temperature of the plugging material evenly distributed in the drilling fluid also rises. When the temperature of the plugging material reaches the starting expansion temperature, the plugging material begins to expand, and the temperature continues to rise, then the volume of the expanded plugging material will increase.

[0089] In one method, at least one small segmented heating device is pre-installed on the wellbore, each heating device is connected to the electronic device for communication, and each heating device is controlled by the electronic device to generate heat. In this method, the electronic device determines at least one heating device corresponding to the gap area, and then controls at least one heating device to generate heat, thereby increasing the temperature of the drilling fluid and the temperature of the plugging material, so that the plugging material flexibly expands to plug the gap in the formation.

[0090] The present embodiment provides a method for sealing formation cracks. In the present embodiment, the electronic device first detects the cracks in the formation, then determines the crack area, and further calculates the added mass of the sealing material. The sealing material can flexibly expand in volume as the temperature rises. The sealing material exists in the drilling fluid, and the drilling fluid exists in the wellbore. The electronic device controls the temperature rise in the crack area, thereby causing the drilling fluid temperature in the crack area to rise, so the temperature of the sealing material in the crack area will also rise, so that the sealing material can flexibly expand to seal the cracks in the formation. The sealing material in the present application is a flexible sealing material, so it can better fill the cracks in the formation; in addition, the sealing material in the present application is evenly distributed in the drilling fluid, so when sealing the cracks in the formation, the sealing material is evenly distributed, so that cracks of different sizes can be filled, and there will be no situation where there is only a small amount of sealing material in a large crack, thereby achieving uniform sealing, so the present application improves the sealing effect.

[0091] Embodiment 2

[0092] This embodiment is a further refinement of any of the above embodiments. This embodiment is an optional way to determine the fracture area in response to detecting fractures in the formation.

[0093] Figure 3 A schematic flow chart of a method for plugging formation gaps provided in Example 2. Figure 3 As shown, specifically including:

[0094] S301, controlling the noise meter to fall from the wellhead, and receiving noise data collected by the noise meter at the formation depth during the falling process.

[0095] Among them, the noise meter can be an underground operation noise meter.

[0096] The noise meter is communicatively connected with the electronic device.

[0097] In one embodiment, the noise meter can be connected to the falling control device by wire, and the falling control device can control the falling of the noise meter by wire. The falling control device can be connected to the electronic device for communication, and the falling control device can collect or determine the falling depth of the noise meter in the formation. The falling control device can send the falling depth and the corresponding noise data to the electronic device, so that the electronic device receives the noise data collected by the noise meter at the formation depth.

[0098] In another way, the noise meter can be directly connected to the electronic device by wire, and the electronic device can control the falling of the noise meter by wire. The electronic device can collect or determine the falling depth of the noise meter in the formation and receive the noise data of the noise meter at the depth of the formation.

[0099] It should be noted that there are corresponding noise data at any stratum depth.

[0100] S302: In response to noise data received at a first depth of a formation exceeding a preset fracture threshold, determining the first depth of the formation as a start depth of a formation fracture.

[0101] Specifically, it is assumed that the noise meter is directly connected to the electronic device via wire, so that the electronic device can directly receive the noise data of the noise meter at the formation depth.

[0102] The preset gap threshold refers to a preset noise threshold for a gap in the formation. When the measured noise data exceeds the preset gap threshold, it is determined that there is a formation gap at the formation depth. It should be noted that the formation gap has a start depth and an end depth.

[0103] The starting depth refers to the shallowest depth of the stratum fracture, and the ending depth refers to the deepest depth of the stratum fracture.

[0104] Specifically, the electronic device obtains noise data at each stratum depth and compares each noise data with a preset gap threshold. If it is determined that the noise data received at a first depth of a stratum exceeds the preset gap threshold, the first depth of the stratum is determined to be the starting depth of the stratum fracture.

[0105] Exemplarily, assuming that the electronic device receives noise data corresponding to three formation depths, the noise data of the first two formation depths are within the preset gap threshold, and the noise data corresponding to the third formation depth exceeds the preset gap threshold, it is determined as the first formation depth, and it is determined that there is a formation gap at this time, and the first formation depth is determined as the starting depth.

[0106] S303, continue to control the noise meter to fall, in response to the noise data received at the second depth of the formation changing from continuously exceeding the preset gap threshold to being less than or equal to the preset gap threshold, determine the second depth of the formation as the end depth of the formation fracture; between the starting depth and the end depth of the formation fracture, the noise data collected by the noise meter all exceed the preset gap threshold.

[0107] Specifically, after the electronic device determines the starting depth of the formation crack, it continues to control the noise meter to fall so as to determine the ending depth of the formation crack.

[0108] Furthermore, after determining the starting depth, the electronic device assumes that noise data corresponding to four formation depths are received, the noise data corresponding to the first three formation depths all exceed the preset gap threshold, and the noise data corresponding to the fourth formation depth is less than the preset gap threshold, thereby determining the fourth formation depth as the second formation depth, and determining the second formation depth as the end depth of the formation gap.

[0109] It should be noted that when determining the formation gap, the wellbore carries the initial drilling fluid. If there is a formation gap in the formation, the drilling fluid will leak, thereby generating noise at the formation gap, so that the noise data at the formation gap is greater than the noise data at other places without formation gaps. Therefore, this scheme uses a noise meter to determine the formation gap in the formation. When it is determined that the noise data corresponding to the first depth of the formation exceeds the preset gap threshold, the first depth of the formation is determined to be the starting depth, indicating that the drilling fluid is leaking at this time. The noise meter continues to fall, and the noise data received in the formation gap is greater than the preset gap threshold. When it falls to the second depth of the formation, its corresponding noise data is less than the preset gap threshold, then the second depth of the formation is determined to be the end depth.

[0110] S304, determining the fracture area based on the start depth and the end depth of the formation fracture.

[0111] In one approach, the area covered by the start depth and the end depth of a formation fracture is determined as the fracture area.

[0112] The present embodiment provides a method for sealing formation fractures. In the present embodiment, noise data collected by a noise meter is used, and the noise data is compared with a preset fracture threshold. When the noise data at a first depth of the formation exceeds the preset fracture threshold, it is determined to be the starting depth of the formation fracture. When the noise data at a second depth of the formation is less than the preset fracture threshold, it is determined to be the end depth of the formation fracture. Therefore, in the present embodiment, the starting depth and the end depth of the formation fracture can be accurately determined based on the noise data, thereby accurately determining the fracture area.

[0113] Embodiment 3

[0114] This embodiment is a further refinement of any of the above embodiments. This embodiment is an optional way to determine the fracture area based on the start depth and end depth of the formation fracture.

[0115] This embodiment includes:

[0116] The difference between the end depth and the start depth is calculated and determined as the gap depth, and the gap area is determined based on the gap depth.

[0117] Specifically, the end depth is expressed as Indicates that the starting depth is The gap depth is .

[0118] In one embodiment, the electronic device can The covered stratigraphic area is identified as the fracture area.

[0119] This embodiment provides a method for plugging formation fractures. In this embodiment, the fracture depth is calculated, and the fracture area is further determined based on the fracture depth.

[0120] Embodiment 4

[0121] This embodiment is a further refinement of any of the above embodiments. This embodiment is an optional way to determine the gap area based on the gap depth.

[0122] Specifically, it includes: determining the stratum area covered by the fracture depth as the fracture area.

[0123] This embodiment also includes:

[0124] The stratum area included in the crack depth and the areas preset above and below the stratum area are determined as the crack area.

[0125] The areas preset above and below the stratigraphic area refer to an area preset above the stratigraphic area and an area preset below the stratigraphic area.

[0126] The preset area may be an area corresponding to a depth of 5 meters, for example, an area corresponding to 5 meters above Ho and an area corresponding to 5 meters below Ho.

[0127] It can be understood that the area corresponding to 5 meters above the formation area covered by the gap depth Ho, and the area corresponding to 5 meters below the formation area covered by the gap depth Ho.

[0128] This embodiment provides a method for sealing formation fractures. In this embodiment, the formation area covered by the fracture depth is determined as the fracture area, or the formation area included by the fracture depth and the areas preset above and below the formation area are determined as the fracture area. This ensures that the fracture area has a wider range and can create better temperature conditions for subsequent sealing work.

[0129] Embodiment 5

[0130] This embodiment is a further refinement of any of the above embodiments, and is an optional way to calculate the added mass of the plugging material.

[0131] Figure 4 A schematic diagram of a method for plugging a formation crack provided in Example 5. Figure 4 As shown, specifically including:

[0132] S401, obtaining a relationship table between the volume expansion rate and temperature corresponding to the plugging material.

[0133] The relationship table between volume expansion rate and temperature is pre-stored.

[0134] It should be noted that when the temperature is different, the corresponding volume expansion rate of the plugging material is different.

[0135] Table 1 is a relationship table in this embodiment.

[0136] Table 1

[0137]

[0138] As shown in Table 1, the first temperature corresponds to a first volume expansion rate, the second temperature corresponds to a second volume expansion rate, and the third temperature corresponds to a third volume expansion rate.

[0139] S402, obtaining a preset target temperature for volume expansion of the plugging material.

[0140] The target temperature refers to the final temperature to which the temperature of the plugging material is raised in actual application.

[0141] It should be noted that the target temperature is less than or equal to the maximum temperature that the plugging material can reach.

[0142] In one embodiment, the electronic device obtains a preset target temperature of the plugging material at a storage center.

[0143] S403, determining the volume expansion rate corresponding to the target temperature from the relationship table.

[0144] Furthermore, the electronic device determines the volume expansion rate corresponding to the target temperature from the relationship table.

[0145] Exemplarily, assuming that the target temperature is consistent with the third temperature, the third volume expansion rate corresponding to the third temperature is determined to be the volume expansion rate corresponding to the target temperature.

[0146] S404, calculating the added mass of the plugging material based on the volume expansion rate.

[0147] This embodiment provides a method for plugging formation fractures. In this embodiment, the volume expansion rate corresponding to the target temperature is determined from a relationship table, and an accurate volume expansion rate can be obtained, and an accurate added mass can be calculated.

[0148] Embodiment 6

[0149] This embodiment is a further refinement of any of the above embodiments. This embodiment is an optional method for calculating the added mass of the plugging material based on the volume expansion rate.

[0150] Specifically include:

[0151] The volume of the drilling fluid is obtained, and the ratio of the volume of the drilling fluid to the volume expansion rate is calculated as the added mass of the plugging material.

[0152] The volume of the drilling fluid is determined based on the volume of the wellbore and can be pre-stored in the electronic device.

[0153] In turn, the electronic device obtains the volume of drilling fluid from the storage center.

[0154] Furthermore, the added mass is calculated based on the following formula (1).

[0155] (1)

[0156] in, is the volume expansion rate corresponding to the target temperature, in units of ; is the added mass of plugging material, unit ; Drilling fluid volume, unit .

[0157] It should be noted that, in order to ensure that the plugging material can be better filled into the formation gaps, the target temperature in this embodiment can be set to the highest temperature that the plugging material can reach.

[0158] In one method, the target temperature is the highest temperature that the plugging material can reach, and its corresponding volume expansion rate is the maximum volume expansion rate. Therefore, the added mass of the plugging material is as shown in formula (2):

[0159] (2)

[0160] Furthermore, the addition ratio can be calculated based on the added mass, i.e. ,in, To add a ratio, unit .

[0161] In one embodiment, the ratio of the volume of the drilling fluid to the volume expansion rate is calculated as the minimum mass of the plugging material, and the added mass of the plugging material is determined to be greater than the minimum mass.

[0162] In this way, determining that the added mass is greater than the minimum mass can make the mass of the plugging material actually added greater, which can ensure that the drilling fluid is covered with more plugging material, thereby making the formation cracks more filled, thereby enabling the formation cracks to be better filled.

[0163] This embodiment provides a method for plugging formation fractures. In this embodiment, the ratio of the volume of the drilling fluid to the volume expansion rate is determined as the added mass of the plugging material.

[0164] Embodiment 7

[0165] This embodiment is a further refinement of any of the above embodiments. This embodiment is an optional way to control the temperature rise in the gap area to allow the added mass of the plugging material to flexibly expand and plug the formation gaps.

[0166] Specifically include:

[0167] The heating unit prepared for the fracture area is controlled to fall into the fracture area, and the heating unit is controlled to heat the fracture area to the target temperature of the plugging material, so that the plugging material with added mass can flexibly expand and plug the formation fracture.

[0168] The heating unit can be prepared according to the gap area, and the heating depth of the heating unit is consistent with the depth of the gap area, so as to ensure that the temperature of the gap area can be increased.

[0169] Specifically, the electronic device controls the heating unit to drop to the gap area, then controls the heating unit to generate heat, and controls the heating unit to generate heat to a target temperature, so that the blocking material is heated to the target temperature, and then the blocking material flexibly expands to block the formation gaps.

[0170] It should be noted that, after determining the added mass of the plugging material, the user can evenly add the added mass of the plugging material to the drilling fluid, so that the drilling fluid includes the plugging material.

[0171] It should be noted that the added mass of the plugging material in this embodiment is in grams, and plugging can be achieved with a small amount of added mass, without the need to add a large mass of plugging material, so the entire plugging process is simple and convenient.

[0172] This embodiment provides a method for sealing formation cracks. In this embodiment, the electronic device controls the heating unit to fall to the crack area, and controls the heating unit to heat the sealing material so that the sealing material reaches a target temperature, thereby allowing the sealing material to expand flexibly.

[0173] Embodiment 8

[0174] Figure 5 A schematic diagram of a formation fracture provided for Example 8.

[0175] like Figure 5 As shown, plugging materials are added into the formation cracks, and the plugging materials are evenly distributed in the drilling fluid. When the temperature rises, the volume of the plugging materials flexibly expands, thereby filling the formation cracks.

[0176] Figure 6 A schematic diagram of a blocking method provided in Example 8. Figure 6 As shown, specifically including:

[0177] When an ultra-deep gas well in a basin was drilled to a depth of 6540m, fracture leakage occurred. The well leakage depth (i.e., the fracture depth) was between 4600m and 4752m. The highest wellbore temperature measured at the depth of 6540m was 171 The drilling fluid density is 1.82g / cm 3 . Use plugging material (such as expanded graphite) as plugging. The density of the selected expanded graphite is 1.24g / cm 3 The initial expansion temperature is 185 , higher than the highest temperature of the wellbore, the plugging material is evenly distributed in the drilling fluid. Set the target temperature to 300 , reaching the target temperature of 300 Volume expansion rate 250cm 3 / g, the corresponding added mass is calculated according to the volume of drilling fluid, and the added ratio of expanded graphite is further calculated as 0.004g / cm 3That is, only 0.004g of expanded graphite needs to be added to each cubic centimeter of drilling fluid. The extremely low amount will not affect the performance of the drilling fluid. After the proportioning is completed, the drilling fluid is pumped into the wellbore. After 2 hours, the drilling fluid containing expanded graphite is returned from the wellhead and is ready for heating. The continuous pipe cable device is used for heating. The minimum length of the heating unit is calculated to be (4752-4600) = 152m. The actual length of the heating unit is set to 165m, covering the range of 4594m~4759m (that is, the gap area), and the power is 600Kw. After the gap area is heated to 300℃ and heated for 2.5h, the expanded graphite expands in volume to fill the formation cracks, and the drilling fluid loss is significantly reduced. The polymer gel plugging effect is continued to be used in the future, and the leakage completely disappears.

[0178] Among them, 4600m is the starting depth of the stratum fissure.

[0179] Among them, 4752m is the end depth of the stratum gap.

[0180] Embodiment 9

[0181] The following is an embodiment of the device of the present application. Figure 7 This is a schematic diagram of the structure of a sealing device for formation gaps provided in Example 9. Figure 7 As shown, the formation crack plugging device 700 includes the following modules:

[0182] A determination module 701 is used to determine a crack area in response to detecting a crack in the formation;

[0183] The calculation module 702 is used to calculate the added mass of the plugging material; the plugging material is a material that can flexibly expand in volume as the temperature rises; the initial expansion temperature of the plugging material is greater than or equal to the highest temperature of the wellbore; the wellbore carries the drilling fluid, and the added mass of the plugging material is evenly distributed in the drilling fluid;

[0184] The control module 703 is used to control the temperature rise in the crack area so that the added mass of the plugging material can flexibly expand and plug the formation cracks.

[0185] In one embodiment, in response to detecting a crack in the formation, the determination module 701 determines the crack area, specifically for:

[0186] Control the noise meter to fall from the wellhead, and receive the noise data collected by the noise meter at the formation depth during the falling process;

[0187] In response to noise data received at a first depth of the formation exceeding a preset gap threshold, determining the first depth of the formation as a start depth of a formation gap;

[0188] Continue to control the noise meter to fall, and in response to the noise data received at the second depth of the formation continuously exceeding the preset gap threshold to being less than or equal to the preset gap threshold, determine the second depth of the formation as the end depth of the formation gap; between the start depth and the end depth of the formation gap, the noise data collected by the noise meter all exceed the preset gap threshold;

[0189] The fracture area is determined based on the start depth and end depth of the formation fracture.

[0190] In one embodiment, when determining the fracture area based on the start depth and the end depth of the formation fracture, the determination module 701 is specifically used to:

[0191] Calculate the difference between the end depth and the start depth, and determine the difference as the gap depth;

[0192] The gap area is determined based on the gap depth.

[0193] In one embodiment, when determining the gap area based on the gap depth, the determination module 701 is specifically configured to:

[0194] determining a stratum region covered by the fracture depth as a fracture region; and / or,

[0195] The stratum area included in the crack depth and the areas preset above and below the stratum area are determined as the crack area.

[0196] In one embodiment, when calculating the added mass of the plugging material, the calculation module 702 is specifically used to:

[0197] Obtain a relationship table between the volume expansion rate and temperature corresponding to the plugging material;

[0198] Obtaining a preset target temperature of volume expansion of the plugging material;

[0199] Determine the volume expansion rate corresponding to the target temperature from the relationship table;

[0200] The added mass of the plugging material is calculated based on the volume expansion rate.

[0201] In one embodiment, when calculating the added mass of the plugging material based on the volume expansion rate, the calculation module 702 is specifically used to:

[0202] Obtain the volume of drilling fluid;

[0203] The ratio of the volume of the drilling fluid to the volume expansion rate is calculated as the added mass of the plugging material.

[0204] In one embodiment, the control module 703 is used to control the temperature rise in the crack region so that the added mass of the plugging material can flexibly expand and plug the cracks in the formation.

[0205] Controlling the heating unit prepared for the gap area to fall into the gap area;

[0206] The heating unit is controlled to heat the crack area to the target temperature of the plugging material, so that the plugging material with added mass can flexibly expand and plug the formation cracks.

[0207] Embodiment 10

[0208] Figure 8 This is a schematic diagram of the structure of an electronic device provided in Example 10. Figure 8 As shown, the electronic device 800 may include: a processor 801, and a memory 802 in communication with the processor 801. The memory 802 stores computer-executable instructions; the processor 801 executes the computer-executable instructions stored in the memory 802 to implement any one of the method embodiments in the above-mentioned embodiments 1 to 8, and the specific implementation methods and technical effects are similar, which will not be repeated here.

[0209] In this embodiment, the memory 802 and the processor 801 are connected via a bus. The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 8 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0210] Embodiment 11

[0211] The present application provides a computer-readable storage medium, in which computer execution instructions are stored. When the computer execution instructions are executed by a processor, they are used to implement any one of the method embodiments of Embodiments 1 to 8 above. The specific implementation methods and technical effects are similar and will not be repeated here.

[0212] Embodiment 12

[0213] The present application provides a computer program product, including a computer program. When the computer program is executed by a processor, it implements any one of the method embodiments of Embodiments 1 to 8 above. The specific implementation methods and technical effects are similar and will not be repeated here.

[0214] In the several embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of modules is only a logical function division, and there may be other division methods in actual implementation, such as multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0215] The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed on multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0216] In addition, each functional module in each embodiment of the present invention may be integrated into one processing module, or each module may exist physically separately, or two or more modules may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of hardware plus software functional modules.

[0217] The program code for implementing the method of the present invention can be written in any combination of one or more programming languages. These program codes can be provided to a processor or controller of a general-purpose computer, a special-purpose computer or other programmable interrupt processing device, so that the program code, when executed by the processor or controller, enables the functions / operations specified in the flow chart and / or block diagram to be implemented. The program code can be executed entirely on the machine, partially on the machine, partially on the machine as a stand-alone software package and partially on a remote machine, or entirely on a remote machine or server.

[0218] In the context of the present invention, a machine-readable medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device, or equipment. A machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or equipment, or any suitable combination of the foregoing. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0219] In addition, although each operation is described in a specific order, this should be understood as requiring such operation to be performed in the specific order shown or in a sequential order, or requiring that all illustrated operations should be performed to obtain desired results. Under certain circumstances, multitasking and parallel processing may be advantageous. Similarly, although some specific implementation details are included in the above discussion, these should not be interpreted as limiting the scope of the present invention. Some features described in the context of a separate embodiment can also be implemented in a single implementation in combination. On the contrary, the various features described in the context of a single implementation can also be implemented in multiple implementations individually or in any suitable sub-combination mode.

[0220] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0221] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A method for plugging formation gaps, characterized in that: The method comprises: In response to detecting a fracture in the formation, determining a fracture area; The added mass of the plugging material is calculated; the plugging material is a material that can flexibly expand in volume as the temperature rises; the initial expansion temperature of the plugging material is greater than or equal to the highest temperature of the wellbore; the wellbore carries drilling fluid, and the added mass of the plugging material is evenly distributed in the drilling fluid; The temperature rise of the crack area is controlled so that the added mass of the plugging material can flexibly expand and plug the formation cracks.

2. The method according to claim 1, characterized in that In response to detecting a crack in the formation, determining the crack area includes: Control the noise meter to fall from the wellhead, and receive the noise data collected by the noise meter at the formation depth during the falling process; In response to noise data received at a first depth of the formation exceeding a preset gap threshold, determining the first depth of the formation as a start depth of a gap in the formation; Continue to control the noise meter to fall, and in response to the noise data received at the second depth of the formation continuously exceeding the preset gap threshold to being less than or equal to the preset gap threshold, determine that the second depth of the formation is the end depth of the formation gap; between the start depth and the end depth of the formation gap, the noise data collected by the noise meter all exceed the preset gap threshold; A fracture area is determined based on the start depth and the end depth of the formation fracture.

3. The method according to claim 2, characterized in that The determining of the fracture area based on the start depth and the end depth of the formation fracture comprises: Calculating the difference between the end depth and the start depth, and determining the difference as the gap depth; The gap area is determined based on the gap depth.

4. The method according to claim 3, characterized in that: The determining the gap area based on the gap depth includes: determining the stratum region covered by the fracture depth as the fracture region; and / or, The stratum region included in the crack depth and the regions preset above and below the stratum region are determined as the crack region.

5. The method according to claim 1, characterized in that The calculation of the added mass of the plugging material includes: Obtaining a relationship table between the volume expansion rate and temperature corresponding to the plugging material; Obtaining a preset target temperature for volume expansion of the plugging material; Determining the volume expansion rate corresponding to the target temperature from the relationship table; The added mass of the plugging material is calculated based on the volume expansion rate.

6. The method according to claim 5, characterized in that The calculating the added mass of the plugging material based on the volume expansion rate includes: Obtain the volume of drilling fluid; The ratio of the volume of the drilling fluid to the volume expansion rate is calculated as the added mass of the plugging material.

7. The method according to claim 1, characterized in that The step of controlling the temperature rise of the crack region so that the plugging material with added mass flexibly expands and plugs the cracks in the formation comprises: Controlling the heating unit prepared for the gap area to fall into the gap area; The heating unit is controlled to heat the crack region to a target temperature of the plugging material, so that the plugging material with added mass can flexibly expand and plug the formation cracks.

8. A sealing device for formation gaps, characterized in that: The blocking device for the formation gap comprises: A determination module, configured to determine a crack area in response to detecting a crack in the formation; A calculation module is used to calculate the added mass of the plugging material; the plugging material is a material that can flexibly expand in volume as the temperature rises; the initial expansion temperature of the plugging material is greater than or equal to the highest temperature of the wellbore; the wellbore carries drilling fluid, and the added mass of the plugging material is evenly distributed in the drilling fluid; The control module is used to control the temperature rise of the gap area so that the added mass of the plugging material can flexibly expand and plug the formation gap.

9. An electronic device, comprising: A processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 7 when executed by a processor.

11. A computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

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