Well control methods, devices, apparatus, storage media, and products

Abstract

The application provides a well killing method, device, equipment, storage medium and product. The method comprises the following steps: in response to the phenomenon of blowout and leakage in the wellbore, obtaining high-pressure formation pressure and low-pressure formation pressure; determining the expansion material addition ratio and the target well killing fluid density according to the high-pressure formation pressure and the low-pressure formation pressure; using the target well killing fluid with the target well killing fluid density to kill the wellbore; the expansion material is uniformly distributed in the target well killing fluid; the wellbore temperature in the formation changes positively with the depth; the target well killing fluid density changes positively with the wellbore temperature due to the existence of the expansion material in the target well killing fluid, so that the high-pressure invasion layer liquid column density of the wellbore is higher than the low-pressure leakage layer liquid column density. In the application, the expansion material is distributed in the target well killing fluid, the formation fluid invasion is reduced, the target well killing fluid leakage is also reduced, and the well killing efficiency is improved.

Description

Technical Field

[0001] The present application relates to safe well control technology, and in particular to a well killing method, device, equipment, storage medium and product. Background Art

[0002] Ultra-deep oil and gas reserves are abundant and represent a key source for increasing reserves and production. However, ultra-deep oil and gas development faces numerous challenges, including complex geological conditions, complex pressure zones, and the development of natural fractures. For example, the Tarim Basin boasts extremely thick gravel layers 4122-5833 meters thick (in the Bozi 1 well area), and composite salt-gypsum layers 3518-5969 meters thick (in the Keshen 10 well area). Eleven pressure zones have been encountered from top to bottom in the fractured-vuggy marine carbonate reservoirs in the platform-basin area.

[0003] At present, complex geological conditions lead to special situations in which the wellbore encounters high-pressure formations in the upper part and low-pressure formations in the lower part during drilling. The wellbore's pressure fluid will seep into the high-pressure formation and leak out in the low-pressure formation, which is called the upper spraying and lower leakage phenomenon.

[0004] However, due to the existence of high-pressure formations at the top and low-pressure formations at the bottom, in some cases a large amount of well-killing fluid will enter the low-pressure formation, resulting in less well-killing fluid entering the high-pressure formation, leading to low well-killing efficiency and inability to effectively control the invasion of high-pressure formation fluids. In severe cases, it may even evolve into a major blowout accident. Summary of the Invention

[0005] The present application provides a well killing method, device, equipment, storage medium and product to solve the problems of low well killing efficiency, high-pressure formation fluid invasion, and well killing fluid loss in low-pressure loss layers.

[0006] In a first aspect, the present application provides a well killing method, the method comprising:

[0007] In response to the presence of blowout and leakage in the wellbore, obtain high-pressure formation pressure and low-pressure formation pressure;

[0008] Determining the expansion material addition ratio and the target killing fluid density according to the high-pressure formation pressure and the low-pressure formation pressure;

[0009] A target well-killing fluid with the target well-killing fluid density is used to kill the wellbore; the expansion material is evenly distributed in the target well-killing fluid; the wellbore temperature of the wellbore in the formation changes positively correlated with the depth; the target well-killing fluid density changes positively correlated with the wellbore temperature due to the presence of the expansion material in the wellbore, so that the liquid column density of the high-pressure invasion layer of the wellbore is higher than the liquid column density of the low-pressure leakage layer.

[0010] In one embodiment, in response to the presence of blowout and leakage in the wellbore, obtaining the high-pressure formation pressure and the low-pressure formation pressure includes:

[0011] In response to the presence of an upward blowout and downward leakage phenomenon in the wellbore, a first depth and a second depth are determined; the first depth is a depth corresponding to a high-pressure invasion layer in the wellbore, and the second depth is a depth corresponding to a low-pressure leakage layer; at least one pressure gauge and a noise meter are included at the first depth; at least one pressure gauge and a noise meter are included at the second depth;

[0012] Controlling the change of the density of the well-killing fluid in the wellbore from low to high, and receiving the noise data sent by the noise meter at the first depth and the second depth; no swelling material is added to the well-killing fluid;

[0013] At a second depth, in response to corresponding noise meter noise data being less than a preset static threshold, receiving and determining a pressure value corresponding to the pressure gauge at the second depth as a low-pressure formation pressure;

[0014] Continue to control the change of the density of the wellbore detection fluid from low to high. At the first depth, in response to the corresponding noise meter noise data being less than the preset static threshold, receive and determine the pressure value corresponding to the pressure gauge at the first depth as the high-pressure formation pressure.

[0015] In one embodiment, in response to the presence of a blowout phenomenon in the wellbore, determining the first depth and the second depth includes:

[0016] In response to the presence of upward spraying and downward leakage in the wellbore, the noise meter is controlled to fall from the wellhead; the wellbore carries the detection well-killing fluid;

[0017] In response to noise data received during the falling process being greater than or equal to a preset flow threshold, determining the corresponding depth as a first depth;

[0018] The noise meter is continuously controlled to descend, and in response to the received noise data being greater than or equal to the preset flow threshold, the corresponding depth is determined to be a second depth.

[0019] In one embodiment, determining the expansion material addition ratio and the target killing fluid density according to the high-pressure formation pressure and the low-pressure formation pressure includes:

[0020] Input the initial calculated killing fluid density and low-pressure formation pressure into the low-pressure leakage zone algorithm, and use the low-pressure leakage zone algorithm to output the initial addition ratio;

[0021] If it is determined that the initial addition ratio meets the requirements of the high-pressure invasion layer, the initial calculated killing fluid density is determined as the target killing fluid density, and the initial addition ratio is determined as the expansion material addition ratio;

[0022] If it is determined that the initial addition ratio does not meet the requirements of the high-pressure invasion layer, the initial calculated killing fluid density is adjusted to determine the expansion material addition ratio and the target killing fluid density.

[0023] In one embodiment, before inputting the initially calculated killing fluid density and the low-pressure formation pressure into the low-pressure leakage zone algorithm and using the low-pressure leakage zone algorithm to output the initial addition ratio, the method includes:

[0024] Divide the depth from the high-pressure invasion layer to the low-pressure leakage layer into at least one segment; each segment corresponds to a depth;

[0025] determining a first temperature and a second temperature corresponding to the first depth and the second depth, respectively;

[0026] Determining a temperature profile using the first temperature and the second temperature; the temperature profile including temperatures corresponding to at least one segment divided by depth from a high-pressure intrusion layer to a low-pressure leakage layer;

[0027] The temperature corresponding to at least one segment is obtained from the temperature profile, and a volume expansion rate versus temperature graph is generated using the temperature corresponding to the at least one segment; the volume expansion rate versus temperature graph includes the volume expansion rate corresponding to the at least one segment temperature; the volume expansion rate is the volume expansion rate of the expanding substance at different temperatures.

[0028] In one embodiment, determining that the initial addition ratio meets the requirements of the high-pressure intrusion layer includes:

[0029] Inputting the initial addition ratio into a high-voltage intrusion layer verification algorithm to output a verification result;

[0030] If the verification result is in compliance, it is determined that the initial addition ratio meets the high-voltage layer intrusion requirement.

[0031] In one embodiment, adjusting the initially calculated killing fluid density to determine the swelling material addition ratio and the target killing fluid density includes:

[0032] Controlling the addition of barite into the initially calculated killing fluid to adjust the density of the initially calculated killing fluid;

[0033] The adjusted initial calculated killing fluid density and the low-pressure formation pressure are input into the low-pressure leakage layer algorithm until the adjusted initial calculated killing fluid density meets the high-pressure invasion layer requirement, the addition ratio corresponding to the high-pressure invasion layer requirement is determined as the expansion material addition ratio, and the adjusted initial calculated killing fluid density is determined as the target killing fluid density.

[0034] In a second aspect, the present application provides a well-killing device, comprising:

[0035] An acquisition module, configured to acquire high-pressure formation pressure and low-pressure formation pressure in response to the presence of an upward blowout and downward leakage phenomenon in the wellbore;

[0036] a determination module, configured to determine an addition ratio of the expansion material and a target killing fluid density according to the high-pressure formation pressure and the low-pressure formation pressure;

[0037] The well-killing module is used to kill the well using a target well-killing fluid with the target well-killing fluid density; the expansion material is evenly distributed in the target well-killing fluid; the wellbore temperature of the wellbore in the formation changes positively correlated with the depth; the target well-killing fluid density changes positively correlated with the wellbore temperature due to the presence of the expansion material in the wellbore, so that the liquid column density of the high-pressure invasion layer of the wellbore is higher than the liquid column density of the low-pressure leakage layer.

[0038] In a third aspect, the present application provides an electronic device, comprising: a processor, and a memory communicatively connected to the processor;

[0039] The memory stores computer-executable instructions;

[0040] The processor executes the computer-executable instructions stored in the memory to implement the method as described in any one of the first aspects above.

[0041] 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 to implement the method as described in any one of the above-mentioned first aspects.

[0042] In a fifth aspect, the present application provides a computer program product, comprising a computer program, which, when executed by a processor, implements the method as described in any one of the above-mentioned first aspects.

[0043] The present application provides a well-killing method, device, equipment, storage medium and product. The electronic device first responds to the phenomenon of upward spraying and downward leakage in the wellbore to obtain the high-pressure formation pressure and the low-pressure formation pressure, thereby determining the addition ratio of the expansion material and the target well-killing fluid density. Furthermore, the target well-killing fluid with the target well-killing fluid density is used for well-killing. In the present application, the expansion material is evenly distributed in the target well-killing fluid. The wellbore temperature of the wellbore in the formation changes positively correlated with the depth. Due to the presence of the expansion material in the wellbore, the target well-killing fluid density changes positively correlated with the wellbore temperature, thereby making the liquid column density of the high-pressure invasion layer of the wellbore higher than the liquid column density of the low-pressure leakage layer, thereby increasing the high-pressure invasion layer. The pressure of the entry layer is reduced, the pressure of the low-pressure leakage layer is reduced, thereby reducing the invasion of formation fluid into the high-pressure invasion layer, and also reducing the leakage of target well-killing fluid from the low-pressure leakage layer into the low-pressure formation, thereby ensuring the pressure of the high-pressure invasion layer and improving the well-killing efficiency; in addition, in the present application, the target well-killing fluid is evenly distributed with expansion materials, and the expansion materials expand in volume with temperature changes, so that the gaps in the formation can be sealed, further reducing the invasion of formation fluid and the loss of target well-killing fluid; in addition, in the present application, the target well-killing fluid is evenly distributed with expansion materials added in a certain proportion, under this addition proportion, the expansion materials that have expanded in volume can better fill the gaps, thereby further improving the well-killing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] 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.

[0045] Figure 1 This is an application scenario diagram of a well killing method provided in this application;

[0046] Figure 2 A schematic flow chart of a well killing method provided in Example 1;

[0047] Figure 3 A schematic flow chart of a well killing method provided in Example 2;

[0048] Figure 4 A schematic flow chart of a well killing method provided in Example 3;

[0049] Figure 5 A schematic flow chart of a well killing method provided in Example 4;

[0050] Figure 6 A schematic flow chart of a well killing method provided in Example 5;

[0051] Figure 7 A schematic diagram of a wellbore provided for Example 7;

[0052] Figure 8A schematic structural diagram of a well-killing device provided in Example 8;

[0053] Figure 9 A schematic diagram of the structure of an electronic device provided in Example 9.

[0054] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0055] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0056] At present, complex geological conditions lead to special situations in which the wellbore encounters high-pressure formations in the upper part and low-pressure formations in the lower part during drilling. The wellbore's pressure fluid will seep into the formation fluid in the high-pressure formation and leak in the low-pressure formation. This is called the upper spraying and lower leakage phenomenon.

[0057] However, since there are both high-pressure formations above and low-pressure formations below, in some cases a large amount of well-killing fluid will enter the low-pressure formation, resulting in less well-killing fluid entering the high-pressure formation, thereby reducing the pressure of the high-pressure invasion layer, resulting in low well-killing efficiency and inability to effectively control the invasion of high-pressure formation fluids. In severe cases, it may evolve into a major blowout accident.

[0058] To address the shortcomings of the prior art, the inventors of the present invention have devised a novel solution through creative research. This solution provides a well-killing method that addresses the problem of low well-killing efficiency. In response to the presence of blowout and leakage, the present invention determines the high-pressure formation pressure and the low-pressure formation pressure, thereby determining the addition ratio of an expansive material and a target killing fluid density. A target killing fluid having the target killing fluid density is then used for well-killing. The expansive material added at this ratio is uniformly distributed in the target killing fluid. The volume of the expansive material varies positively with the wellbore temperature, which also varies positively with depth. This causes the expansive material to expand at different depths, making the liquid column density of the high-pressure invasion layer higher than that of the low-pressure leakage layer. Consequently, the pressure in the high-pressure invasion layer increases, while the pressure in the low-pressure leakage layer decreases. Consequently, the low-pressure leakage layer reduces the loss of the target killing fluid. Consequently, the target killing fluid in the high-pressure invasion layer increases, while the pressure in the high-pressure invasion layer also increases. This reduces the intrusion of formation fluid into the high-pressure invasion layer, thereby improving well-killing efficiency. In addition, in the present application, the target well-killing fluid is uniformly distributed with an expansive substance, which expands in volume when the temperature rises, thereby further sealing the formation gaps, thereby reducing the intrusion of formation fluids and the loss of well-killing fluid. In addition, in the present application, an addition ratio of the expansive substance is determined, and at this addition ratio, the volume expansion effect of the expansive substance in the target well-killing fluid can be better, the filling can be better, and thus a better sealing effect can be achieved.

[0059] The following describes the application scenarios of a well-killing method, device, equipment, storage medium, and product provided by this application.

[0060] Figure 1 This is an application scenario diagram of a well killing method provided in this application. Figure 1 As shown, the application scenario diagram includes an electronic device 101.

[0061] The electronic device 101 may be any device with computing capabilities, and the electronic device 101 may be used in safety well control.

[0062] Specifically, the user may click on "upper spray and lower leakage phenomenon" on the electronic device 101, so that the electronic device 101 responds to the upper spray and lower leakage phenomenon in the wellbore, thereby obtaining the high-pressure formation pressure and the low-pressure formation pressure.

[0063] Furthermore, the electronic device 101 determines the expansion material addition ratio and the target killing fluid density according to the high-pressure formation pressure and the low-pressure formation pressure, and then uses the target killing fluid corresponding to the target killing fluid density to kill the wellbore. The expansion material is evenly distributed in the target killing fluid.

[0064] In this scenario, since the wellbore temperature in the wellbore in the stratum changes positively with the depth, and since the target well killing fluid contains the swelling material, the target well killing fluid density changes positively with the wellbore temperature, so that the high-pressure invasion layer fluid column density of the wellbore is higher than the low-pressure leakage layer fluid column density.

[0065] It should be noted that when the high-pressure invasion layer fluid column density increases, the high-pressure invasion layer pressure also increases, thereby reducing the invasion of the stratum fluid into the high-pressure invasion layer and improving the well killing effect of the high-pressure invasion layer. When the low-pressure leakage layer fluid column density decreases, the low-pressure leakage layer pressure also decreases, thereby also reducing the leakage of the target well killing fluid from the low-pressure leakage layer.

[0066] It should be noted that the swelling material is added in the present application, and when the wellbore temperature changes positively with the depth, the swelling material in the target well killing fluid also swells in volume, thereby plugging the cracks in the stratum. Further, the invasion of the stratum fluid into the high-pressure invasion layer is reduced, and the leakage of the target well killing fluid in the low-pressure leakage layer into the stratum is reduced, thereby further improving the well killing efficiency.

[0067] It should be noted that the swelling material is added in the present application according to the addition ratio, which can make the filling effect of the cracks in the stratum better, so as to further reduce the leakage or invasion and improve the well killing efficiency.

[0068] It should be noted that in the present application, the high-pressure invasion layer fluid column density of the wellbore is controlled to be higher than the low-pressure leakage layer fluid column density, so that the high-pressure invasion layer pressure is greater than or equal to the sum of the high-pressure stratum pressure and the minimum pressure difference of well killing, and the low-pressure leakage layer pressure is equal to the low-pressure stratum pressure, thereby improving the well killing efficiency.

[0069] The well killing method provided in the present application aims to solve the above technical problems of the prior art.

[0070] The technical solutions of the present application and how the technical solutions of the present application solve the above technical problems will be described in detail below with specific examples. The following specific examples can be combined with each other, and the same or similar concepts or processes can not be described again in some examples. The embodiments of the present application will be described below with reference to the drawings.

[0071] Embodiment one

[0072] The execution subject of the embodiments one to seven of the present application is a well killing device, which is located in an electronic equipment.

[0073] Figure 2 A well killing method flow chart is provided for embodiment one. As shown in Figure 2 , specifically comprising:

[0074] S201, in response to the presence of upward blowout and downward leakage in the wellbore, obtaining the high-pressure formation pressure and the low-pressure formation pressure.

[0075] The high-pressure formation pressure refers to the pressure of the high-pressure formation.

[0076] The low-pressure formation pressure refers to the pressure of the low-pressure formation.

[0077] It should be noted that, in a formation, as the depth decreases, the formation pressure decreases. High-pressure formations are located at the top of the formation, while low-pressure formations are located at the bottom of the formation.

[0078] It should be noted that in a well control scenario, a wellbore is loaded into the formation. In the wellbore, the high-pressure formation corresponds to the high-pressure invasion layer, and the low-pressure formation corresponds to the low-pressure loss layer. If a kill fluid is injected into the wellbore, and the pressure in the low-pressure loss layer is higher than that of the low-pressure formation, the kill fluid will leak from the low-pressure loss layer into the low-pressure formation. If the pressure in the high-pressure invasion layer is lower than that of the high-pressure formation, the fluid in the high-pressure formation will invade the high-pressure invasion layer, causing upward spraying and downward leakage.

[0079] In one approach, the pressure coefficient distribution of the formation may be determined, and then the high-pressure formation pressure and the low-pressure formation pressure may be obtained by accumulating the formation pressures.

[0080] In another way, a noise meter and a pressure gauge can be used to measure the pressure in the high-pressure formation and the low-pressure formation, thereby obtaining the high-pressure formation pressure and the low-pressure formation pressure.

[0081] S202: Determine the expansion material addition ratio and target killing fluid density according to the high-pressure formation pressure and the low-pressure formation pressure.

[0082] The addition ratio refers to the ratio of the swelling material added to the target well-killing fluid, and can be expressed as the number of grams of swelling material added to each cubic centimeter of the target well-killing fluid.

[0083] The expanding material is a material that expands in volume as the temperature changes, such as expanded graphite, etc., which is not limited here.

[0084] The target killing fluid density refers to the density of the target killing fluid pumped into the wellbore. The target killing fluid is the killing fluid that can improve the killing efficiency in this application.

[0085] In one approach, the target killing fluid density can be calculated based on the low-pressure lost zone algorithm and the high-pressure invaded zone requirement.

[0086] S203, using a target killing fluid with a target killing fluid density to kill the wellbore; the swelling material is evenly distributed in the target killing fluid; the wellbore temperature in the formation changes positively correlated with the depth; the target killing fluid density changes positively correlated with the wellbore temperature due to the presence of the swelling material in the wellbore, so that the liquid column density of the high-pressure invasion layer of the wellbore is higher than the liquid column density of the low-pressure loss layer.

[0087] In the present application, the expansive material is evenly distributed in the target well-killing fluid. As the wellbore depth increases, the wellbore temperature also increases. Therefore, it can be seen that the target well-killing fluid temperature in the wellbore will also change in a positive correlation with the depth. The greater the depth, the greater the target well-killing fluid temperature, which causes the expansive material distributed in the target well-killing fluid to expand in volume. The volume expansion rate of the expansive material in the low-pressure leakage layer is higher than the volume expansion rate of the expansive material in the high-pressure invasion layer. As a result, the volume expansion degree of the expansive material in the low-pressure leakage layer is greater than that of the expansive material in the high-pressure invasion layer, thereby making the liquid column density of the high-pressure invasion layer of the wellbore higher than the liquid column density of the low-pressure leakage layer.

[0088] Furthermore, at a higher liquid column density, the high-pressure invasion layer increases its pressure, making it greater than or equal to the sum of the high-pressure formation pressure and the minimum pressure difference for well killing. In addition, at a lower liquid column density, the low-pressure leakage layer pressure is equal to the low-pressure formation pressure, thereby achieving well killing and improving well killing efficiency.

[0089] The high-pressure invasion layer refers to the upper part of the wellbore in the high-pressure formation.

[0090] Among them, the low-pressure leakage zone refers to the lower part of the wellbore in the low-pressure formation.

[0091] This embodiment provides a well killing method. In this embodiment, an expansive material is uniformly distributed in a target killing fluid. The wellbore temperature in the formation changes positively with depth. Due to the presence of the expansive material in the wellbore, the density of the target killing fluid changes positively with the wellbore temperature. This results in a higher density of the liquid column in the high-pressure invasion layer than in the low-pressure loss layer. This increases the pressure in the high-pressure invasion layer and reduces the pressure in the low-pressure loss layer, thereby reducing the invasion of formation fluid into the high-pressure invasion layer and the loss of the target killing fluid from the low-pressure loss layer into the low-pressure formation. This ensures the pressure in the high-pressure invasion layer and improves the well killing efficiency. In addition, the target killing fluid in this application has an even distribution of the expansive material. The expansive material expands in volume with temperature changes, thereby sealing cracks in the formation and further reducing formation fluid invasion and loss of the target killing fluid. In addition, the target killing fluid in this application has an even distribution of the expansive material added at a certain ratio. At this addition ratio, the expanded expansive material can better fill cracks, thereby further improving the well killing efficiency.

[0092] Example 2

[0093] This embodiment is a further refinement of any of the above embodiments. This embodiment is an optional way to obtain high-pressure formation pressure and low-pressure formation pressure in response to the upper blowout and lower leakage phenomenon in the wellbore.

[0094] Figure 3 A schematic flow chart of a well killing method provided in Example 2. Figure 3 As shown, specifically including:

[0095] S301, in response to the existence of upward blowing and downward leakage in the wellbore, determine the first depth and the second depth; the first depth is the depth corresponding to the high-pressure intrusion layer in the wellbore, and the second depth is the depth corresponding to the low-pressure leakage layer; the first depth includes at least one pressure gauge and a noise meter; the second depth includes at least one pressure gauge and a noise meter.

[0096] In this embodiment, the depth corresponding to the center position of the high-pressure intrusion layer may be used as the first depth, and the depth corresponding to the center position of the low-pressure leakage layer may be used as the second depth.

[0097] Among them, the noise meter can collect sound data at the corresponding depth.

[0098] Among them, the pressure gauge can collect pressure data at the corresponding depth.

[0099] Among them, the noise meter and the pressure meter can be connected to the electronic equipment for communication.

[0100] S302, controlling the density of the wellbore to change from low to high, and receiving noise data sent by noise meters at the first depth and the second depth; and detecting that no swelling material is added to the wellbore.

[0101] Among them, the detection well-killing fluid is a well-killing fluid used to detect formation pressure.

[0102] It should be noted that the density of the test killing fluid initially pumped into the wellbore is relatively low.

[0103] In one embodiment, controlling the change in density of the well-killing fluid from low to high may be performed by adding a density control substance according to a preset control amount, wherein the density control substance may be barite, or others, which are not limited here.

[0104] The preset control amount refers to the mass of the density control substance added each time. For example, 5 grams of density control substance is added each time.

[0105] Specifically, the electronic device can control the addition of barite into the detection well-killing fluid according to a preset control amount, thereby changing the density of the detection well-killing fluid.

[0106] It should be noted that the density control substance is added to the detection drilling fluid uniformly.

[0107] It should be noted that when the density control substance is added to the detection drilling fluid, the noise data transmitted by the corresponding noise detector at the first depth and the second depth is received.

[0108] S303, at the second depth, in response to the corresponding noise detector noise data being less than the preset static threshold, receiving and determining that the pressure value corresponding to the pressure gauge at the second depth is the low-pressure formation pressure.

[0109] Further, if the noise data corresponding to the second depth is greater than the preset static threshold, the density control substance is continuously added to change the density of the detection drilling fluid, and the corresponding noise data at the two depths is again received, and this is repeated until the noise data received at the second depth first is less than the preset static threshold, the electronic device receives the pressure value corresponding to the pressure gauge at the second depth at this density, and determines the pressure value as the low-pressure formation pressure.

[0110] It can be understood that in the embodiment, the density of the detection drilling fluid is controlled so that the loss of drilling fluid at the low-pressure loss layer is reduced, and at this time, the noise caused by the loss at the low-pressure loss layer is smaller, so the preset static threshold is set in the embodiment.

[0111] The preset static threshold is a sound threshold corresponding to the flow of drilling fluid or formation fluid when the flow no longer occurs.

[0112] It should be noted that when the noise data is less than the preset static threshold, it means that the flow sound of the drilling fluid or the formation fluid at this formation depth is very small, indicating that there is no loss or invasion at this time.

[0113] S304, continue to control the density of the detection drilling fluid in the wellbore to change from low to high, at the first depth, in response to the corresponding noise detector noise data being less than the preset static threshold, receiving and determining that the pressure value corresponding to the pressure gauge at the first depth is the high-pressure formation pressure.

[0114] After the low-pressure formation pressure is determined, the electronic device continues to control the density of the detection drilling fluid in the wellbore to change from low to high, so that the corresponding noise detector noise data at the first depth is received, and it is determined that the noise data is less than the preset static threshold, and then the pressure value corresponding to the pressure gauge at the second depth is received, and the pressure value is determined as the high-pressure formation pressure.

[0115] The embodiment provides a well killing method, in the embodiment, the first depth and the second depth are determined, the density of the well killing fluid is controlled to change from low to high in the wellbore, at the first depth, in response to the corresponding noise data being less than a preset static threshold value, it is considered that the loss of the well killing fluid is little at the density, and then the corresponding pressure value is determined as the low-pressure formation pressure, and the high-pressure formation pressure is determined by using the same method, so that the two pressures can be accurately determined in the embodiment.

[0116] Embodiment three

[0117] The embodiment is further refinement of any one of the above embodiments, and the embodiment is an optional manner for determining the first depth and the second depth in response to the blowout and loss phenomenon existing in the wellbore.

[0118] Figure 4 A well killing method flowchart is provided for the embodiment three. As shown in the figure, the embodiment three specifically comprises the following steps. Figure 4

[0119] S401, in response to the blowout and loss phenomenon existing in the wellbore, the noise instrument is controlled to fall from the wellhead, and the well killing fluid is detected in the wellbore.

[0120] In the embodiment, the electronic device can connect the noise instrument by wire, so as to control the noise instrument to fall.

[0121] S402, in response to the noise data received in the falling process being greater than or equal to a preset flow threshold value, the corresponding depth is determined as the first depth.

[0122] In the embodiment, the preset flow threshold value refers to a preset sound threshold value generated by the well killing fluid loss or the formation fluid invasion.

[0123] It should be noted that the noise instrument continuously collects noise data in the falling process, and sends the noise data to the electronic device.

[0124] Further, the electronic device compares each noise data with the preset flow threshold value, and if it is determined that the corresponding noise data at a certain depth is greater than or equal to the preset flow threshold value, the depth is determined as the first depth.

[0125] S403, the noise instrument continues to fall, and in response to the received noise data being greater than or equal to the preset flow threshold value, the corresponding depth is determined as the second depth.

[0126] In the embodiment, the electronic device determines the first depth, and then continues to control the noise instrument to fall, and continues to receive the noise data sent by the noise instrument at each depth, and if it is determined that the corresponding noise data at a certain depth is greater than or equal to the preset flow threshold value, the depth is determined as the second depth.

[0127] ​This embodiment provides a well pressure method. In this embodiment, the electronic device controls the noise meter to fall, and in response to the noise data being greater than or equal to a preset flow threshold, determines the first depth and the second depth in sequence. In this embodiment, the noise data and the preset flow threshold are used to determine the above two depths, which can more accurately determine the position.

[0128] Example 4

[0129] This embodiment is a further refinement of any of the above embodiments. This embodiment is an optional way to determine the expansion material addition ratio and the target well-killing fluid density according to the high-pressure formation pressure and the low-pressure formation pressure.

[0130] Figure 5 A schematic flow chart of a well killing method provided in Example 4. Figure 5 As shown, specifically including:

[0131] S501: Input the initially calculated killing fluid density and the low-pressure formation pressure into the low-pressure leakage layer algorithm, and use the low-pressure leakage layer algorithm to output the initial addition ratio.

[0132] The initial calculated killing fluid refers to the killing fluid density designed for calculating the addition ratio.

[0133] Among them, the low-pressure leakage layer algorithm is used to calculate the addition ratio of expansion material.

[0134] The initial addition ratio is the ratio calculated based on the initial calculation of the killing fluid. It should be noted that the initial addition ratio is not necessarily the target addition ratio, so it is also necessary to determine whether the initial addition ratio meets the requirements of the high-pressure invasion layer.

[0135] S502: If it is determined that the initial addition ratio meets the requirements of the high-pressure invasion layer, the initially calculated killing fluid density is determined as the target killing fluid density, and the initial addition ratio is determined as the expansion material addition ratio.

[0136] The high-pressure invasion layer requirement refers to the requirement that the pressure of the high-pressure invasion layer is greater than or equal to the sum of the high-pressure formation pressure and the minimum pressure difference for well killing.

[0137] S503: If it is determined that the initial addition ratio does not meet the requirements of the high-pressure invasion layer, the initial calculated killing fluid density is adjusted to determine the expansion material addition ratio and the target killing fluid density.

[0138] In one approach, the electronic device can readjust the initially calculated kill fluid density, and then calculate a new addition ratio based on the new initially calculated kill fluid, the low-pressure formation pressure, and the low-pressure leakage zone algorithm to continue determining whether the high-pressure invasion zone requirements are met, thereby determining the expansion material addition ratio and the target kill density.

[0139] The embodiment provides a well killing method, high pressure invasion layer requirements are set in the embodiment, if the high pressure invasion layer requirements cannot be met, the initial calculated well killing fluid is continuously adjusted so as to determine the expansion material adding proportion and the target well killing fluid density, so that the reasonable adding proportion and the target well killing fluid density can be obtained, and the well killing efficiency is further improved.

[0140] Embodiment five

[0141] The embodiment is a further refinement of any of the above embodiments, and the initial calculated well killing fluid density and the low pressure formation pressure are input into the low pressure leakage layer algorithm in the embodiment, and an optional mode before the initial adding proportion output by the low pressure leakage layer algorithm is adopted.

[0142] Figure 6 A well killing method flowchart provided for the embodiment five is shown in the figure. Figure 6 As shown in the figure, the well killing method flowchart specifically comprises the following steps.

[0143] S601, the depth from the high pressure invasion layer to the low pressure leakage layer is divided into at least one segment; the segment corresponds to a depth.

[0144] For example, it is assumed that the depth from the high pressure invasion layer to the low pressure leakage layer is 100 meters, and one meter is one segment, so that the depth is divided into 100 segments, and the temperature corresponding to the center of each segment is the temperature of the segment.

[0145] S602, the first temperature and the second temperature corresponding to the first depth and the second depth are determined.

[0146] S603, the temperature profile is determined by using the first temperature and the second temperature; the temperature profile comprises the temperature corresponding to at least one segment divided by the depth from the high pressure invasion layer to the low pressure leakage layer.

[0147] In the embodiment, the temperature sensor can be used to determine the first temperature and the second temperature corresponding to the first depth and the second depth, and then the depth and temperature simulation software is used to determine the temperature profile in the formation, and the temperature profile comprises the temperature corresponding to at least one segment.

[0148] S604, the temperature corresponding to at least one segment is obtained from the temperature profile, and the volume expansion rate-temperature relationship diagram is generated by using the temperature corresponding to at least one segment; the volume expansion rate-temperature relationship diagram comprises the volume expansion rate corresponding to at least one segment temperature; the volume expansion rate is the volume expansion rate of the expansion material at different temperatures.

[0149] Table 1 is a depth-temperature-volume expansion rate relationship diagram. As shown in Table 1, is the first depth.

[0150] wherein the depth corresponding to the first segment is , the corresponding temperature is The volume expansion rate is , the depth corresponding to the second segment is , the corresponding temperature is T2, and the volume expansion rate is , the depth corresponding to the third segment is , the corresponding temperature is The volume expansion rate is .

[0151] Table 1

[0152]

[0153] Therefore, the temperature and volume expansion rate corresponding to each segment can be obtained according to the temperature profile and relationship diagram.

[0154] The low-pressure loss layer algorithm in this embodiment includes the following formula:

[0155] (1)

[0156] in, is the wellbore pressure at the low-pressure leakage zone, in units of ; is the low-pressure formation pressure, unit .

[0157] In this embodiment, if one wants to reduce the well fluid loss in the low-pressure leakage layer, the wellbore pressure in the low-pressure leakage layer (ie, the low-pressure leakage layer pressure) is made equal to the low-pressure formation pressure.

[0158] (2)

[0159] in, is the liquid column pressure generated by the low-pressure leakage layer pressure well fluid column, unit ; is the liquid column pressure generated by high-pressure invading well fluid, unit ; The pressure of the killing fluid at the wellhead, unit: MPa; is the flow friction of the well-killing fluid, unit .

[0160] (3)

[0161] in, is the total number of segments, dimensionless; is the segment length, ; is the density of the killing fluid corresponding to the i-th segment, .

[0162] (4)

[0163] in, is the density of the expanding substance without volume expansion, ; is the density of the killing fluid without adding swelling material, ; is the volume expansion rate corresponding to the i-th segment expansion material; The temperature corresponding to the i-th segment can be determined from the temperature profile, and then the volume expansion rate corresponding to the i-th segment can be obtained from the relationship between volume expansion rate and temperature; is the proportion of expansion material added (i.e. the unknown number that needs to be calculated).

[0164] The initial calculated killing fluid density is the density of the killing fluid without adding swelling material. , in formula (4), 、 as well as All are known numbers.

[0165] (5)

[0166] in, is the density of the killing fluid when swelling material is added and no volume expansion occurs. ; is the acceleration due to gravity, ; is the first depth.

[0167] (6)

[0168] Therefore, the initial calculated killing fluid density and low pressure formation pressure are input into the above six formulas to calculate the addition ratio of the corresponding expansion material under the initial calculated killing fluid density. , this is the initial addition ratio, and Used for verification of the following examples.

[0169] This embodiment provides a well killing method. In this embodiment, a temperature profile is determined according to the depth, and a relationship diagram is further determined, so that the volume expansion rate corresponding to each segment can be determined.

[0170] Example 6

[0171] This embodiment is a further refinement of any of the above embodiments. This embodiment is an optional method for determining the initial addition ratio to meet the requirements of the high-pressure intrusion layer, specifically including:

[0172] The initial addition ratio is input into the high-voltage intrusion layer verification algorithm to output a verification result. If the verification result is in compliance, it is determined that the initial addition ratio meets the high-voltage layer intrusion requirement.

[0173] The high-level intrusion layer verification algorithm is as follows:

[0174] (7)

[0175] in, is the wellbore pressure at the high-pressure invasion layer (i.e., high-pressure invasion layer pressure), unit ; is the high pressure formation pressure, unit ; is the minimum pressure difference for well killing. Among them, the minimum pressure difference for well killing is known.

[0176] (8)

[0177] in, When the addition ratio of the expansion material is The corresponding high pressure invading layer well fluid generates the liquid column pressure, unit ; is the flow friction of the killing fluid from the wellhead to the high-pressure invasion layer, in units of .in, is the addition ratio calculated by the low-pressure loss layer algorithm.

[0178] It should be noted that when the initial calculation of the expansion material addition ratio (ie the initial addition ratio) under the well killing fluid is calculated by the low-pressure leakage layer algorithm, Afterwards, Input it into (8) above to calculate the high-pressure invasion layer pressure, and then compare the high-pressure invasion layer pressure with the calibration pressure to obtain the calibration result. Among them, the calibration pressure is the sum of the high-pressure formation pressure and the minimum pressure difference for well killing.

[0179] The verification result may be that the pressure of the high-pressure intrusion layer is greater than or equal to the verification pressure, or the verification result may be that the pressure of the high-pressure intrusion layer is less than the verification pressure.

[0180] Furthermore, if the verification result shows that the high-pressure intrusion layer pressure is greater than or equal to the verification pressure, the verification result is determined to be in compliance, and the initial addition ratio is determined to meet the high-pressure intrusion layer requirement.

[0181] If the high-pressure invasion layer pressure in the verification result is less than the verification pressure, the verification result is determined to be inconsistent, and the initial calculated killing fluid density is adjusted, that is, the killing fluid density without adding swelling material is adjusted. .

[0182] This embodiment provides a well-killing method. In this embodiment, a verification result is output through a high-pressure invasion layer verification algorithm to determine whether the initial addition ratio meets the high-pressure invasion requirements. In this embodiment, a high-pressure invasion layer verification algorithm is used to determine whether the initial addition ratio meets the high-pressure invasion layer requirements, so that the initial addition ratio meets the current formation well-killing requirements.

[0183] Example 7

[0184] This embodiment is a further refinement of any of the above embodiments. This embodiment is an optional method for adjusting the initial calculated killing fluid density to determine the expansion material addition ratio and the target killing fluid density, specifically including:

[0185] Control the addition of barite to the initial calculated killing fluid to adjust the initial calculated killing fluid density;

[0186] The adjusted initial calculated killing fluid density and the low-pressure formation pressure are input into the low-pressure leakage layer algorithm until the adjusted initial calculated killing fluid density meets the requirements of the high-pressure invasion layer. The addition ratio corresponding to the requirements of the high-pressure invasion layer is determined as the expansion material addition ratio, and the adjusted initial calculated killing fluid density is determined as the target killing fluid density.

[0187] In this embodiment, when adjusting the initial calculated killing fluid density, the electronic device may calculate the initial calculated killing fluid density after adding barite according to a preset control amount to the initial calculated killing fluid, thereby adjusting the initial calculated killing fluid.

[0188] Furthermore, the electronic device re-inputs the adjusted initial calculated killing fluid density and low-pressure formation pressure into the low-pressure leakage zone algorithm to obtain the corresponding addition ratio. , and will Input into the high voltage intrusion layer verification algorithm to determine the The verification result of the To meet the requirements of high pressure intrusion layer, The addition ratio of the swelling material is determined, and the adjusted initial calculated killing fluid is determined as the target killing fluid density.

[0189] Furthermore, if it does not meet the requirements, continue to adjust the initial calculation of the well killing fluid and continue to calculate the corresponding addition ratio. , and determine whether the corresponding verification result meets the requirements, until the initial calculation of the well-killing fluid that meets the verification result is adjusted and the addition ratio of the corresponding expansion material is calculated.

[0190] Figure 7 A schematic diagram of a wellbore provided in Example 7. Figure 7As shown, it includes casing 701, open hole wellbore 702, high pressure formation 703, low pressure formation 704, and formation 705.

[0191] Example 8

[0192] This embodiment is an apparatus embodiment. Figure 8 This is a schematic diagram of the structure of a well-killing device provided in Example 8. Figure 8 As shown, the well killing device includes:

[0193] An acquisition module 801 is configured to acquire high-pressure formation pressure and low-pressure formation pressure in response to a blowout and leakout phenomenon in the wellbore;

[0194] Determination module 802, for determining the expansion material addition ratio and target killing fluid density according to the high-pressure formation pressure and the low-pressure formation pressure;

[0195] The well-killing module 803 is used to kill the wellbore using a target well-killing fluid with a target well-killing fluid density; the expansion material is evenly distributed in the target well-killing fluid; the wellbore temperature in the formation changes positively correlated with the depth; due to the presence of the expansion material in the wellbore, the density of the target well-killing fluid changes positively correlated with the wellbore temperature, so that the liquid column density of the high-pressure invasion layer of the wellbore is higher than the liquid column density of the low-pressure loss layer.

[0196] In one embodiment, the acquisition module 801, in response to the presence of blowout and leakage in the wellbore, acquires the high-pressure formation pressure and the low-pressure formation pressure, specifically for:

[0197] In response to the presence of an upward blowout and downward leakage phenomenon in the wellbore, a first depth and a second depth are determined; the first depth is a depth corresponding to a high-pressure invasion layer in the wellbore, and the second depth is a depth corresponding to a low-pressure leakage layer; at least one pressure gauge and a noise meter are included at the first depth; at least one pressure gauge and a noise meter are included at the second depth;

[0198] Controlling the change of the density of the well-killing fluid in the wellbore from low to high, and receiving the noise data sent by the noise meter at the first depth and the second depth; detecting that no swelling material is added to the well-killing fluid;

[0199] At the second depth, in response to the noise data of the corresponding noise meter being less than a preset static threshold, receiving and determining the pressure value corresponding to the pressure gauge at the second depth as the low-pressure formation pressure;

[0200] Continue to control the change of the density of the wellbore detection fluid from low to high. At the first depth, in response to the corresponding noise meter noise data being less than the preset static threshold, receive and determine the pressure value corresponding to the pressure gauge at the first depth as the high-pressure formation pressure.

[0201] In one embodiment, the acquisition module 801, in response to the presence of the blowout phenomenon in the wellbore, when determining the first depth and the second depth, is specifically configured to:

[0202] In response to the phenomenon of upward spraying and downward leakage in the wellbore, the noise meter is controlled to fall from the wellhead; the wellbore carries the detection well killing fluid;

[0203] In response to noise data received during the falling process being greater than or equal to a preset flow threshold, determining the corresponding depth as a first depth;

[0204] The noise meter is continuously controlled to descend, and in response to the received noise data being greater than or equal to the preset flow threshold, the corresponding depth is determined to be a second depth.

[0205] In one embodiment, when determining the swelling material addition ratio and the target killing fluid density based on the high-pressure formation pressure and the low-pressure formation pressure, the determination module 802 is specifically configured to:

[0206] Input the initial calculated killing fluid density and low-pressure formation pressure into the low-pressure leakage zone algorithm, and use the low-pressure leakage zone algorithm to output the initial addition ratio;

[0207] If it is determined that the initial addition ratio meets the requirements of the high-pressure invasion layer, the initial calculated killing fluid density is determined as the target killing fluid density, and the initial addition ratio is determined as the expansion material addition ratio;

[0208] If it is determined that the initial addition ratio does not meet the requirements of the high-pressure invasion layer, the initial calculated killing fluid density is adjusted to determine the expansion material addition ratio and the target killing fluid density.

[0209] In one approach, before inputting the initial calculated kill fluid density and the low-pressure formation pressure into a low-pressure loss layer algorithm and using the low-pressure loss layer algorithm to output an initial addition ratio, this embodiment provides a kill device, further comprising: a partitioning module and a generation module;

[0210] A division module is used to divide the depth from the high-pressure intrusion layer to the low-pressure leakage layer into at least one segment; each segment corresponds to one depth;

[0211] The determination module 802 is further configured to determine a first temperature and a second temperature corresponding to the first depth and the second depth, respectively;

[0212] The determining module 802 is further configured to determine a temperature profile using the first temperature and the second temperature; the temperature profile includes temperatures corresponding to at least one segment divided by depth from the high-pressure intrusion layer to the low-pressure leakage layer;

[0213] The acquisition module 801 is further used to obtain the temperature corresponding to at least one segment from the temperature profile, and the generation module is used to generate a volume expansion rate and temperature relationship diagram using the temperature corresponding to at least one segment; the volume expansion rate and temperature relationship diagram includes the volume expansion rate corresponding to at least one segment temperature; the volume expansion rate is the volume expansion rate of the expanding material at different temperatures.

[0214] In one embodiment, when determining that the initial addition ratio meets the high-pressure intrusion layer requirement, the determination module 802 is specifically configured to:

[0215] Inputting the initial addition ratio into the high-voltage intrusion layer verification algorithm to output the verification result;

[0216] If the verification result is in compliance, it is determined that the initial addition ratio meets the high-voltage layer intrusion requirements.

[0217] In one embodiment, the determination module 802, when adjusting the initially calculated killing fluid density to determine the swelling material addition ratio and the target killing fluid density, is specifically configured to:

[0218] Control the addition of barite to the initial calculated killing fluid to adjust the initial calculated killing fluid density;

[0219] The adjusted initial calculated killing fluid density and the low-pressure formation pressure are input into the low-pressure leakage layer algorithm until the adjusted initial calculated killing fluid density meets the requirements of the high-pressure invasion layer. The addition ratio corresponding to the requirements of the high-pressure invasion layer is determined as the expansion material addition ratio, and the adjusted initial calculated killing fluid density is determined as the target killing fluid density.

[0220] Embodiment 9

[0221] Figure 9 This is a schematic diagram of the structure of an electronic device provided in Example 9. Figure 9 As shown, the electronic device 900 may include: a processor 901, and a memory 902 in communication with the processor 901. The memory 902 stores computer-executable instructions; the processor 901 executes the computer-executable instructions stored in the memory 902 to implement any one of the method embodiments in the first to seventh embodiments described above. The specific implementation methods and technical effects are similar and will not be described in detail here.

[0222] In this embodiment, the memory 902 and the processor 901 are connected via a bus. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 9 Only one thick line is used in the diagram, but this does not mean that there is only one bus or one type of bus.

[0223] Example 10

[0224] The present application provides a computer-readable storage medium, which stores computer-executable instructions. When the computer-executable instructions are executed by a processor, they are used to implement any one of the method embodiments of the above-mentioned embodiments 1 to 7. The specific implementation methods and technical effects are similar and will not be repeated here.

[0225] Example 11

[0226] 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 the above-mentioned embodiments 1 to 7. The specific implementation methods and technical effects are similar and will not be repeated here.

[0227] 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 merely illustrative. For example, the division of modules is merely a logical function division. In actual implementation, there may be other division methods, such as multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interface, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0228] Modules described as separate components may or may not be physically separate, and components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed across multiple network modules. Some or all of these modules may be selected to achieve the purpose of this embodiment based on actual needs.

[0229] In addition, the functional modules in various embodiments of the present invention may be integrated into a single processing module, each module may exist physically separately, or two or more modules may be integrated into a single module. The aforementioned integrated modules may be implemented in the form of hardware or hardware plus software functional modules.

[0230] The program code for implementing the method of the present invention can be written in any combination of one or more programming languages. Such program code can be provided to a processor or controller of a general-purpose computer, a special-purpose computer, or other programmable interrupt handling device, so that when the program code is executed by the processor or controller, the functions / operations specified in the flow chart and / or block diagram are implemented. The program code can be executed entirely on the machine, partially on the machine, as a stand-alone software package, partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0231] 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 apparatus. 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, apparatus, or device, or any suitable combination of the foregoing. More specific examples of machine-readable storage media may include an electrical connection based on one or more wires, 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), optical fibers, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0232] In addition, although adopting specific order to describe each operation, this should be understood as requiring such operation to be carried out in the specific order shown or in sequential order, or requiring all illustrated operations to be carried out to obtain desired result.Under certain environment, multitasking and parallel processing may be advantageous.Similarly, although comprising some specific implementation details in the above discussion, these should not be construed as limiting the scope of the present invention.Some features described in the context of independent embodiment can also be realized in single realization in combination.On the contrary, the various features described in the context of independent realization also can be realized in multiple realizations individually or in the mode of any suitable subcombination.

[0233] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of the present application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0234] It should be understood that the present application is not limited to the exact structure 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 well killing method, characterized in that: The method comprises: In response to the presence of blowout and leakage in the wellbore, obtain high-pressure formation pressure and low-pressure formation pressure; Determining the expansion material addition ratio and the target killing fluid density according to the high-pressure formation pressure and the low-pressure formation pressure; A target killing fluid having the target killing fluid density is used to kill the wellbore; the swelling material is evenly distributed in the target killing fluid; the wellbore temperature of the wellbore in the formation changes positively correlated with the depth; the target killing fluid density changes positively correlated with the wellbore temperature due to the presence of the swelling material in the wellbore, so that the liquid column density of the high-pressure invasion layer of the wellbore is higher than the liquid column density of the low-pressure loss layer; The step of obtaining the high-pressure formation pressure and the low-pressure formation pressure in response to the upward blowout and downward leakage phenomenon in the wellbore includes: In response to the presence of an upward blowout and downward leakage phenomenon in the wellbore, a first depth and a second depth are determined; the first depth is a depth corresponding to a high-pressure invasion layer in the wellbore, and the second depth is a depth corresponding to a low-pressure leakage layer; at least one pressure gauge and a noise meter are included at the first depth; at least one pressure gauge and a noise meter are included at the second depth; Controlling the change of density of the well-killing fluid in the wellbore from low to high, and receiving noise data sent by the noise meter at the first depth and the second depth; no swelling material is added to the well-killing fluid; At a second depth, in response to corresponding noise meter noise data being less than a preset static threshold, receiving and determining a pressure value corresponding to the pressure gauge at the second depth as a low-pressure formation pressure; Continue to control the change of the density of the wellbore detection fluid from low to high. At the first depth, in response to the corresponding noise meter noise data being less than the preset static threshold, receive and determine the pressure value corresponding to the pressure gauge at the first depth as the high-pressure formation pressure.

2. The method according to claim 1, characterized in that In response to the presence of a blowout and leakout phenomenon in the wellbore, determining the first depth and the second depth includes: In response to the presence of upward spraying and downward leakage in the wellbore, the noise meter is controlled to fall from the wellhead; the wellbore carries the detection well-killing fluid; In response to noise data received during the falling process being greater than or equal to a preset flow threshold, determining the corresponding depth as a first depth; The noise meter is continuously controlled to descend, and in response to the received noise data being greater than or equal to the preset flow threshold, the corresponding depth is determined to be a second depth.

3. The method according to claim 1, characterized in that The step of determining the expansion material addition ratio and the target killing fluid density according to the high-pressure formation pressure and the low-pressure formation pressure includes: Input the initial calculated killing fluid density and low-pressure formation pressure into the low-pressure loss zone algorithm, and use the low-pressure loss zone algorithm to output the initial addition ratio; If it is determined that the initial addition ratio meets the requirements of the high-pressure invasion layer, the initial calculated killing fluid density is determined as the target killing fluid density, and the initial addition ratio is determined as the expansion material addition ratio; If it is determined that the initial addition ratio does not meet the requirements of the high-pressure invasion layer, the initial calculated killing fluid density is adjusted to determine the expansion material addition ratio and the target killing fluid density.

4. The method according to claim 3, characterized in that Before inputting the initially calculated killing fluid density and the low-pressure formation pressure into the low-pressure leakage layer algorithm and using the low-pressure leakage layer algorithm to output the initial addition ratio, the method includes: Divide the depth from the high-pressure invasion layer to the low-pressure leakage layer into at least one segment; each segment corresponds to a depth; determining a first temperature and a second temperature corresponding to the first depth and the second depth, respectively; Determining a temperature profile using the first temperature and the second temperature; the temperature profile including temperatures corresponding to at least one segment divided by depth from a high-pressure intrusion layer to a low-pressure leakage layer; The temperature corresponding to at least one segment is obtained from the temperature profile, and a volume expansion rate versus temperature graph is generated using the temperature corresponding to the at least one segment; the volume expansion rate versus temperature graph includes the volume expansion rate corresponding to the at least one segment temperature; the volume expansion rate is the volume expansion rate of the expanding substance at different temperatures.

5. The method according to claim 3, characterized in that Determining that the initial addition ratio meets the requirements of the high-pressure intrusion layer includes: Inputting the initial addition ratio into a high-voltage intrusion layer verification algorithm to output a verification result; If the verification result is in compliance, it is determined that the initial addition ratio meets the high-voltage layer intrusion requirement.

6. The method according to claim 5, characterized in that Adjusting the initially calculated kill fluid density to determine the swelling material addition ratio and the target kill fluid density includes: Controlling the addition of barite to the initially calculated killing fluid to adjust the density of the initially calculated killing fluid; The adjusted initial calculated killing fluid density and the low-pressure formation pressure are input into the low-pressure leakage layer algorithm until the adjusted initial calculated killing fluid density meets the high-pressure invasion layer requirement, the addition ratio corresponding to the high-pressure invasion layer requirement is determined as the expansion material addition ratio, and the adjusted initial calculated killing fluid density is determined as the target killing fluid density.

7. A well killing device, characterized in that: The device comprises: An acquisition module, configured to acquire high-pressure formation pressure and low-pressure formation pressure in response to the presence of an upward blowout and downward leakage phenomenon in the wellbore; a determination module, configured to determine an addition ratio of the expansion material and a target killing fluid density according to the high-pressure formation pressure and the low-pressure formation pressure; A well killing module is configured to kill a wellbore using a target killing fluid having a target killing fluid density; the swelling material is evenly distributed in the target killing fluid; the wellbore temperature of the wellbore in the formation changes positively correlated with depth; the target killing fluid density changes positively correlated with the wellbore temperature due to the presence of the swelling material in the wellbore, so that the density of the target killing fluid column in the high-pressure invasion zone of the wellbore is higher than the density of the liquid column in the low-pressure loss zone; The acquisition module is specifically used to determine a first depth and a second depth in response to the presence of an upward blowout and downward leakage phenomenon in the wellbore; the first depth is the depth corresponding to the high-pressure invasion layer in the wellbore, and the second depth is the depth corresponding to the low-pressure leakage layer; the first depth includes at least one pressure gauge and a noise meter; the second depth includes at least one pressure gauge and a noise meter; control the change of the density of the wellbore detection fluid from low to high, and receive the noise data sent by the noise meter at the first depth and the second depth; no swelling material is added to the detection wellbore fluid; at the second depth, in response to the corresponding noise meter noise data being less than a preset static threshold, receive and determine that the pressure value corresponding to the pressure gauge at the second depth is the low-pressure formation pressure; continue to control the change of the density of the wellbore detection fluid from low to high, at the first depth, in response to the corresponding noise meter noise data being less than the preset static threshold, receive and determine that the pressure value corresponding to the pressure gauge at the first depth is the high-pressure formation pressure.

8. 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 6.

9. 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 6 when executed by a processor.

10. 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 6 is implemented.

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