Method and device for obtaining blind pipe buried height after fracturing packing induced sand control

Abstract

The present application relates to a kind of methods and devices for obtaining blind pipe burial height after fracturing packing induced sand release, wherein fracturing packing induced sand release uses fracturing packing induced sand release pipe column, fracturing packing induced sand release pipe column includes casing, sand control pipe column arranged in casing and service pipe column arranged in sand control pipe column;Wherein in fracturing packing induction stage, pumped slurry carries proppant, proppant cannot pass through the screen pipe of sand control pipe column;Method includes calculating the sand liquid volume of annulus between blind pipe and casing;According to the mass of proppant in the annulus between blind pipe and casing, the mass of proppant in the annulus between blind pipe and casing is calculated;According to the mass of proppant in the annulus between blind pipe and casing, the blind pipe burial height after proppant settlement is calculated.The present application not only avoids the complex operation of checking packing operation, reduces the risk of tool jamming, but also saves operation time, improves operation success rate, in addition, the blind pipe burial height calculated by this method has reliable theoretical basis and accurate result.

Description

Technical Field

[0001] This invention belongs to the field of oilfield well completion technology, specifically relating to a method and apparatus, computing equipment and computer storage medium for obtaining the buried height of blind pipe after fracturing and filling induced sand removal. Background Technology

[0002] In recent years, fracturing and packing sand control technology has been widely used as a new type of mechanical sand control method that integrates production enhancement and sand control. Domestic oilfields are increasingly using fracturing and sand control technology for well completion, and have achieved some research and application results.

[0003] To increase efficiency and reduce operation time, offshore oilfields typically employ multi-layer tools for fracturing operations. These tools are complex, consisting of inner and outer tubing strings. After fracturing, filling, and desanding, the blind pipe burial height needs to be calculated. Current methods primarily use Darcy's law to calculate this. Before operation, the tool is placed at the fracturing / filling position, the annular valve is opened, and a forward circulation test is performed, recording the displacement and pressure. After the desanding pressure is reached during fracturing / filling, the tubing string is raised to the reverse circulation position to remove the ceramsite from the drill pipe. After standing for approximately two hours, the tubing string is lowered back to the filling position. Once the tool is in place, the annular valve is opened, and the same displacement and fluid as the forward circulation are used for a test filling. The blind pipe burial height is calculated based on the pressure difference between the test filling and the forward circulation.

[0004] As can be seen from the above process, the lowering of tools and the verification of filling increase the risk of jamming, and also increase the number of trips to and from the drill string, thereby increasing the operation time. Summary of the Invention

[0005] In view of the above problems, the present invention is proposed to provide a method, apparatus, computing device and computer storage medium for obtaining the burial height of blind pipe after fracturing and filling induced sand removal, in order to overcome or at least partially solve the above problems.

[0006] According to one aspect of the present invention, a method for obtaining the burial height of the blind pipe after fracturing and filling induced desanding is provided, wherein fracturing and filling induced desanding uses a fracturing and filling induced desanding string, the fracturing and filling induced desanding string including a casing, a sand control string disposed within the casing, and a service string disposed within the sand control string;

[0007] During the fracturing and filling induction stage, the pumped slurry carries proppant, which cannot pass through the screen of the sand control tubing.

[0008] The method includes:

[0009] Calculate the volume of sand fluid in the annulus between the blind pipe and the casing;

[0010] The mass of the proppant in the annulus between the blind tube and the casing is calculated based on the volume of the sand liquid.

[0011] The burial height of the blind pipe after the proppant settles is calculated based on the mass of the proppant in the annulus between the blind pipe and the casing.

[0012] Furthermore, the calculation of the volume of sand fluid in the annulus between the blind pipe and the casing further includes:

[0013] The annular volume between the blind tube and the sleeve is calculated based on the annular area between the blind tube and the sleeve and the length of the blind tube.

[0014] The volume of the sand-liquid mixture in the annulus between the blind tube and the casing is obtained based on the annular volume of the annulus between the blind tube and the casing.

[0015] Furthermore, the calculation of the annular volume between the blind tube and the sleeve based on the annular area between the blind tube and the sleeve and the length of the blind tube is specifically as follows: the annular volume between the blind tube and the sleeve is equal to the product of the annular area between the blind tube and the sleeve and the length of the blind tube.

[0016] The method of obtaining the volume of sand and liquid in the annulus between the blind tube and the casing based on the annular volume of the annulus between the blind tube and the casing specifically means that the volume of sand and liquid in the annulus between the blind tube and the casing is equal to the volume of the annulus between the blind tube and the casing.

[0017] Furthermore, calculating the mass of the proppant in the annulus between the blind tube and the casing based on the volume of the sand slurry further includes:

[0018] The mass of proppant in a unit volume of mortar is calculated based on the mass of proppant in a unit volume of bottom-hole clean fluid.

[0019] The mass of the proppant in the annulus between the blind pipe and the sleeve is calculated based on the mass of the proppant per unit volume of mortar and the volume of the mortar liquid.

[0020] Furthermore, the calculation of the proppant mass per unit volume of slurry based on the proppant mass per unit volume of bottom-hole clean fluid specifically involves:

[0021] The mass of proppant in a unit volume of bottom-hole clean fluid is used as the dividend, and the sum of the product of the mass of proppant in a unit volume of bottom-hole clean fluid and the absolute volume coefficient of the proppant and one is used as the divisor. The quotient obtained by dividing the dividend by the divisor is the mass of proppant in a unit volume of mortar.

[0022] Furthermore, the calculation of the mass of proppant in the annulus between the blind pipe and the casing, based on the mass of proppant per unit volume of mortar and the volume of the mortar liquid, specifically involves:

[0023] The mass of the proppant in the annular space between the blind pipe and the casing is equal to the product of the mass of the proppant in the unit volume of mortar and the volume of the mortar liquid.

[0024] Furthermore, the calculation of the buried height of the blind pipe after proppant settlement based on the mass of the proppant in the annulus between the blind pipe and the casing specifically involves:

[0025] The mass of the proppant in the annulus between the blind tube and the casing is used as the divisor, and the product of the bulk density of the proppant and the annular area between the blind tube and the casing is used as the divisor. The quotient obtained by dividing the divisor by the divisor is the buried height of the blind tube after the proppant settles.

[0026] According to another aspect of the present invention, an apparatus is provided for obtaining the burial height of the blind pipe after fracturing and filling induced desanding, wherein the fracturing and filling induced desanding string used for fracturing and filling induced desanding includes a casing, a sand control string disposed within the casing, and a service string disposed within the sand control string;

[0027] During the fracturing and filling induction stage, the pumped slurry carries proppant, which cannot pass through the screen of the sand control tubing.

[0028] The device includes:

[0029] The first calculation module is used to calculate the volume of sand slurry in the annulus between the blind pipe and the casing;

[0030] The second calculation module is used to calculate the mass of the proppant in the annulus between the blind tube and the casing based on the volume of the sand liquid;

[0031] The blind pipe burial height calculation module is used to calculate the burial height of the blind pipe after the proppant settles, based on the mass of the proppant in the annulus between the blind pipe and the casing.

[0032] According to another aspect of the present invention, a computing device is provided, comprising: a processor, a memory, a communication interface, and a communication bus, wherein the processor, the memory, and the communication interface communicate with each other via the communication bus;

[0033] The memory is used to store at least one executable instruction, which causes the processor to perform the operation corresponding to the method described above for obtaining the burial height of the blind tube after fracturing and filling induced sand removal.

[0034] According to another aspect of the present invention, a computer storage medium is provided, the storage medium storing at least one executable instruction, the executable instruction causing a processor to perform the operation of the method described in any of the preceding claims for obtaining the burial height of the blind tube after fracturing and filling induced sand removal.

[0035] As can be seen from the above technical solution, the method and apparatus for obtaining the burial height of the blind tube after fracturing and filling induced sand removal provided by the present invention have the following beneficial effects:

[0036] This invention addresses the complex fracturing and filling operations of sand control tools. By calculating the volume of sand and the mass of proppant, the buried height of the blind tube after sand removal is obtained. This avoids the complex operation of filling verification, reduces the risk of tool jamming, saves operation time, and improves the success rate of the operation. In addition, the theoretical basis of the blind tube buried height calculated by this method is reliable and the results are accurate. Attached Figure Description

[0037] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0038] Figure 1 A schematic diagram of a fracturing filling and desanding induced tubing string;

[0039] Figure 2 This is a schematic diagram showing the proppant after settling.

[0040] Figure 3 This is a flowchart illustrating the method for obtaining the burial height of the blind tube after fracturing and filling induced sand removal, according to an embodiment of the present invention.

[0041] Figure 4 This is a schematic diagram of a computing device according to an embodiment of the present invention;

[0042] The attached diagram is labeled as follows: 1. Service string; 2. Blind tube; 3. Packer; 4. Casing; 5. Perforation section; 6. Screen tube; 7. Filling hole of sand control string; 8. Radial hole. Detailed Implementation

[0043] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0044] Fracturing and packing-induced desanding uses fracturing and packing-induced desanding tubing, such as... Figure 1As shown, the fracturing and filling induced desanding tubing string includes a casing 4, a sand control tubing string installed inside the casing 4, and a service tubing string 1 installed inside the sand control tubing string; wherein the sand control tubing string includes a screen pipe 6, and the tubing string between the screen pipe 6 and the filling hole 7 of the sand control tubing string is a blind pipe 2; the sand control tubing string and the casing 4 are separated by a packer 3 to seal the upper annulus and the lower annulus, and the perforation section 5 is located at the location of the casing 4 corresponding to the screen pipe 6.

[0045] During the fracturing and filling induction stage, proppant-laden slurry is pumped into the inner annulus of the service tubing 1. The slurry then enters the annulus between the screen pipe 6 and the casing 4 through the filling hole 7 of the sand control tubing. Figure 1 The solid black arrow in the middle indicates the flow direction of the mortar carrying the proppant; after the mortar enters the annulus between the screen pipe 6 and the sleeve 4, the proppant cannot pass through the screen pipe 6, so it is trapped in the annulus between the screen pipe 6 and the sleeve 4, while the liquid enters the screen pipe 6 and finally returns through the radial hole 8 above the sand control pipe column. Figure 1 The hollow arrow indicates the direction of liquid flow.

[0046] The filtration of screen pipe 6 causes the proppant trapped outside screen pipe 6 to compact and become increasingly buried. When the proppant reaches the top of screen pipe 6, the fluid return channel to the wellhead is blocked by the proppant, causing a sharp increase in pump pressure and triggering sand removal pressure. At this point, to prevent sand settling inside the tubing and causing the service tubing 1 to become stuck, it is necessary to quickly raise the service tubing 1 to the reverse circulation position. Figure 2 As shown, after the service string 1 is raised to the reverse circulation position, the filling hole 7 of the sand control string is blocked; the blocking of the filling hole causes the proppant below the filling hole to sink naturally, while the proppant above the filling hole is injected with liquid through the annulus and reverse circulated from the drill pipe to the ground.

[0047] After the sand removal pressure is applied, the pump is stopped on the ground. The proppant to be settled exists in the annulus between the filling hole and the top of the screen pipe, that is, the annulus between blind pipe 2 and the casing. Therefore, by calculating the apparent volume of this proppant, the buried height of the blind pipe after the proppant has been completely settled and compacted can be obtained.

[0048] Specifically, such as Figure 3 As shown, the method for obtaining the burial height of the blind tube after fracturing and filling induced sand removal in an embodiment of the present invention includes the following steps:

[0049] Step S01: Calculate the volume of the sand fluid in the annulus between the blind tube and the casing; wherein the sand fluid is the aforementioned sand fluid carrying proppant, and the proppant must be unable to pass through the screen tube;

[0050] Step S02: Calculate the mass of the proppant in the annulus between the blind tube and the casing based on the volume of the sand liquid;

[0051] Step S03: Calculate the buried height of the blind pipe after the proppant settles based on the mass of the proppant in the annulus between the blind pipe and the casing.

[0052] Specifically, step S01, calculating the volume of sand fluid in the annulus between the blind pipe and the casing, further includes:

[0053] The annular volume between the blind tube and the casing is calculated based on the annular area between the blind tube and the casing and the length of the blind tube.

[0054] The volume of the sand-liquid mixture in the annulus between the blind tube and the casing is obtained from the annulus volume between the blind tube and the casing.

[0055] Use A 环空 The annular area between the blind tube and the sleeve is represented by V, where H1 represents the length of the blind tube. 环空 Let A represent the volume of the annulus between the blind tube and the casing. Then, based on the area A of the annulus between the blind tube and the casing... 环空 The annular volume V between the blind tube and the casing can be calculated from the length H1 of the blind tube. 环空 Specifically, the annular volume between the blind tube and the casing is equal to the product of the annular area between the blind tube and the casing and the length of the blind tube, that is...

[0056] V 环空 =A 环空 ·H1.

[0057] Calculate the annular volume V between the blind tube and the casing. 环空 Then, based on the annular volume of the space between the blind tube and the casing, the volume of the sand fluid in the annular space between the blind tube and the casing can be obtained. Specifically, the volume of the sand fluid in the annular space between the blind tube and the casing is equal to the volume of the annular space between the blind tube and the casing.

[0058] Step S02, which calculates the mass of the proppant in the annulus between the blind tube and the casing based on the volume of the sand slurry, further includes:

[0059] The mass of proppant in a unit volume of mortar is calculated based on the mass of proppant in a unit volume of bottom-hole clean fluid.

[0060] The mass of proppant in the annulus between the blind pipe and the casing is calculated based on the mass of proppant per unit volume of mortar and the volume of mortar liquid.

[0061] The mass of the proppant in the annulus between the blind pipe and the casing can be obtained from the known volume of sand slurry. This requires the mass of the proppant per unit volume of sand slurry, which can be calculated from the mass of the proppant per unit volume of bottom hole clean fluid.

[0062] Specifically, the proppant mass per unit volume of mortar is calculated based on the proppant mass per unit volume of bottom-hole clean fluid as follows: the proppant mass per unit volume of bottom-hole clean fluid is used as the dividend, and the sum of the product of the proppant mass per unit volume of bottom-hole clean fluid and the absolute volume coefficient of the proppant and one is used as the divisor. The quotient obtained by dividing the dividend by the divisor is the proppant mass per unit volume of mortar.

[0063] Specifically, using C 砂浓度 The mass of proppant per unit volume of bottom hole clean fluid is expressed by C. 支撑剂 The proppant mass per unit volume of mortar is represented by AVF, which is the absolute volume factor of the proppant, i.e., the volume corresponding to a unit mass of proppant. The divisor is then C. 砂浓度 The divisor is 1+C 砂浓度 AVF, therefore, the proppant mass C per unit volume of mortar 支撑剂 It can be obtained through the following formula:

[0064]

[0065] Specifically, the mass of the proppant in the annulus between the blind pipe and the casing is calculated based on the mass of the proppant in a unit volume of mortar and the volume of the mortar solution. The mass of the proppant in the annulus between the blind pipe and the casing is equal to the product of the mass of the proppant in a unit volume of mortar and the volume of the mortar solution.

[0066] Specifically, let M represent the mass of the proppant in the annulus between the blind tube and the casing, then:

[0067] M = C 支撑剂 V 环空 .

[0068] Specifically, step S03, which calculates the buried height of the blind pipe after proppant settlement based on the mass of the proppant in the annulus between the blind pipe and the casing, involves using the mass of the proppant in the annulus between the blind pipe and the casing as the divisor, and using the product of the bulk density of the proppant and the annular area between the blind pipe and the casing as the divisor. The quotient obtained by dividing the divisor by the divisor is the buried height of the blind pipe after proppant settlement.

[0069] Specifically, H represents the burial height of the blind pipe after proppant settling, and ρ represents... 堆积 Let M represent the bulk density of the proppant, and ρ be the dividend and ρ the divisor. 堆积 A 环空 Therefore, the burial height H of the blind pipe after proppant settling can be obtained by the following formula:

[0070]

[0071] The above steps allow you to calculate the burial height of the blind pipe after proppant settlement. It's important to maintain consistent units in the calculations, for example, using feet (ft).3 If ft represents feet, then the unit for all types of area is ft. 2 All length units are in ft; for example, lb is used to represent mass, which stands for pound.

[0072] The method of this invention will be described in detail below using a well as an example:

[0073] Pipeline dimensions: 4-1 / 2" blind pipe, blind pipe length 12m, 7" 26# sleeve.

[0074] Proppant parameters: Sand concentration in the annulus between the blind pipe and casing during sand removal is 8 ppg (mass of proppant in a unit volume of bottom hole clean fluid), proppant AVF value is 0.0442 gal / lb, and proppant bulk density is 97 lb / ft. 3 ,

[0075] According to C 砂浓度 And AVF, C can be calculated 支撑剂 :

[0076]

[0077] The formula for calculating the burial height H of a blind conduit can be simplified to:

[0078]

[0079] Therefore, the burial height H of the blind pipe can be calculated:

[0080]

[0081] That is, the buried height of the blind pipe after the proppant settles is 17.9 feet.

[0082] The method for obtaining the burial height of the blind pipe after fracturing and filling induced sand removal in this embodiment of the invention avoids the complex operation of filling verification, reduces the risk of tool jamming, saves operation time, and improves the success rate of operation. In addition, the theoretical basis of the burial height of the blind pipe calculated by this method is reliable and the results are accurate.

[0083] This invention also provides a device for obtaining the buried height of the blind pipe after fracturing and filling induced desanding, wherein the fracturing and filling induced desanding string used includes a casing, a sand control string disposed within the casing, and a service string disposed within the sand control string; wherein during the fracturing and filling induction stage, the pumped slurry carries proppant, and the proppant cannot pass through the screen of the sand control string.

[0084] Specifically, the device for obtaining the burial height of the blind pipe after fracturing and filling induced sand removal includes a first calculation module, a second calculation module, and a blind pipe burial height calculation module, wherein:

[0085] The first calculation module is used to calculate the volume of sand slurry in the annulus between the blind tube and the casing;

[0086] The second calculation module is used to calculate the mass of the proppant in the annulus between the blind tube and the casing based on the volume of the sand liquid;

[0087] The blind pipe burial height calculation module is used to calculate the burial height of the blind pipe after the proppant settles, based on the mass of the proppant in the annulus between the blind pipe and the casing.

[0088] This invention provides a non-volatile computer storage medium storing at least one executable instruction that can execute the method described in any of the above method embodiments for obtaining the buried height of the blind tube after fracturing and filling-induced sand removal.

[0089] Figure 4 The diagram shows a structural schematic of an embodiment of a computing device according to the present invention. The specific embodiments of the present invention do not limit the specific implementation of the computing device.

[0090] like Figure 4 As shown, the computing device may include: a processor 402, a communications interface 404, a memory 406, and a communications bus 408.

[0091] The processor 402, communication interface 404, and memory 406 communicate with each other via communication bus 408. Communication interface 404 is used to communicate with other network elements, such as clients or other servers. Processor 402 executes program 410, specifically performing the relevant steps in the above-described method embodiment for obtaining the buried height of the blind pipe after fracturing and backfilling induced sand removal.

[0092] Specifically, program 410 may include program code that includes computer operation instructions.

[0093] Processor 402 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention. The apparatus for obtaining the burial height of the blind pipe after fracturing and filling induced sand removal includes one or more processors, which may be processors of the same type, such as one or more CPUs; or processors of different types, such as one or more CPUs and one or more ASICs.

[0094] Memory 406 is used to store program 410. Memory 406 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0095] Specifically, program 410 can be used to cause processor 402 to execute the method of obtaining the buried height of the blind pipe after fracturing and filling induced sand removal in any of the above method embodiments.

[0096] The algorithms or displays provided herein are not inherently related to any particular computer, virtual system, or other device. Various general-purpose systems can also be used in conjunction with the teachings herein. The required structure for constructing such systems is apparent from the above description. Furthermore, the embodiments of the present invention are not directed to any particular programming language. It should be understood that the content of the invention described herein can be implemented using various programming languages, and the above description of specific languages ​​is for the purpose of disclosing the best mode of implementation of the invention.

[0097] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0098] Similarly, it should be understood that, in order to simplify the invention and aid in understanding one or more of the various inventive aspects, features of the embodiments of the invention are sometimes grouped together in a single embodiment, figure, or description thereof in the above description of exemplary embodiments of the invention. However, this disclosure should not be construed as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, inventive aspects lie in fewer than all features of a single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into this detailed description, wherein each claim itself is a separate embodiment of the invention.

[0099] Those skilled in the art will understand that modules in the device of the embodiments can be adaptively changed and placed in one or more devices different from that embodiment. Modules, units, or components in the embodiments can be combined into a single module, unit, or component, and further, they can be divided into multiple sub-modules, sub-units, or sub-components. Except where at least some of such features and / or processes or units are mutually exclusive, any combination can be used to combine all features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all processes or units of any method or device so disclosed. Unless expressly stated otherwise, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature that serves the same, equivalent, or similar purpose.

[0100] Furthermore, those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments can be used in any combination.

[0101] The various component embodiments of the present invention can be implemented in hardware, or as software modules running on one or more processors, or a combination thereof. Those skilled in the art will understand that microprocessors or digital signal processors (DSPs) can be used in practice to implement some or all of the functions of some or all of the components according to the embodiments of the present invention. The present invention can also be implemented as a device or apparatus program (e.g., a computer program and computer program product) for performing part or all of the methods described herein. Such programs implementing the present invention can be stored on a computer-readable medium, or can be in the form of one or more signals. Such signals can be downloaded from an Internet website, provided on a carrier signal, or provided in any other form.

[0102] It should be noted that the above embodiments are illustrative of the invention and not restrictive, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names. The steps in the above embodiments, unless otherwise specified, should not be construed as limiting the order of execution.

Claims

1. A method for obtaining the burial height of a blind pipe after fracturing and filling induced desanding, wherein fracturing and filling induced desanding uses a fracturing and filling induced desanding string, the fracturing and filling induced desanding string comprising a casing, a sand control string disposed within the casing, and a service string disposed within the sand control string; During the fracturing and filling induction stage, the pumped slurry carries proppant, which cannot pass through the screen of the sand control tubing. Its features are, The method includes: Calculate the volume of sand fluid in the annulus between the blind pipe and the casing; The mass of the proppant in the annulus between the blind tube and the casing is calculated based on the volume of the sand liquid. The burial height of the blind pipe after the proppant settles is calculated based on the mass of the proppant in the annulus between the blind pipe and the casing. The step of calculating the mass of proppant in the annulus between the blind pipe and the casing based on the volume of the sand slurry further includes: calculating the mass of proppant in a unit volume of slurry based on the mass of proppant in a unit volume of bottom hole clean fluid; and calculating the mass of proppant in the annulus between the blind pipe and the casing based on the mass of proppant in a unit volume of slurry and the volume of the sand slurry.

2. The method according to claim 1, characterized in that, The calculation of the volume of sand fluid in the annulus between the blind pipe and the casing further includes: The annular volume between the blind tube and the sleeve is calculated based on the annular area between the blind tube and the sleeve and the length of the blind tube. The volume of the sand-liquid mixture in the annulus between the blind tube and the casing is obtained based on the annular volume of the annulus between the blind tube and the casing.

3. The method according to claim 2, characterized in that, The calculation of the annular volume between the blind tube and the sleeve based on the annular area between the blind tube and the sleeve and the length of the blind tube is specifically as follows: the annular volume between the blind tube and the sleeve is equal to the product of the annular area between the blind tube and the sleeve and the length of the blind tube. The method of obtaining the volume of sand and liquid in the annulus between the blind tube and the casing based on the annular volume of the annulus between the blind tube and the casing specifically means that the volume of sand and liquid in the annulus between the blind tube and the casing is equal to the volume of the annulus between the blind tube and the casing.

4. The method according to claim 1, characterized in that, The calculation of the proppant mass per unit volume of slurry based on the proppant mass per unit volume of bottom-hole clean fluid is as follows: The mass of proppant in a unit volume of bottom-hole clean fluid is used as the dividend, and the sum of the product of the mass of proppant in a unit volume of bottom-hole clean fluid and the absolute volume coefficient of the proppant and one is used as the divisor. The quotient obtained by dividing the dividend by the divisor is the mass of proppant in a unit volume of mortar.

5. The method according to claim 1, characterized in that, The specific calculation of the mass of proppant in the annulus between the blind pipe and the casing, based on the mass of proppant per unit volume of mortar and the volume of mortar liquid, is as follows: The mass of the proppant in the annular space between the blind pipe and the casing is equal to the product of the mass of the proppant in the unit volume of mortar and the volume of the mortar liquid.

6. The method according to claim 1, characterized in that, The calculation of the buried height of the blind pipe after proppant settlement based on the mass of the proppant in the annulus between the blind pipe and the casing is as follows: The mass of the proppant in the annulus between the blind tube and the casing is used as the divisor, and the product of the bulk density of the proppant and the annular area between the blind tube and the casing is used as the divisor. The quotient obtained by dividing the divisor by the divisor is the buried height of the blind tube after the proppant settles.

7. An apparatus for obtaining the burial height of a blind pipe after fracturing and filling induced desanding, wherein the fracturing and filling induced desanding string used includes a casing, a sand control string disposed within the casing, and a service string disposed within the sand control string; During the fracturing and filling induction stage, the pumped slurry carries proppant, which cannot pass through the screen of the sand control tubing. Its features are, The device includes: The first calculation module is used to calculate the volume of sand slurry in the annulus between the blind pipe and the casing; The second calculation module is used to calculate the mass of the proppant in the annulus between the blind tube and the casing based on the volume of the sand liquid; The blind pipe burial height calculation module is used to calculate the burial height of the blind pipe after the proppant settles based on the mass of the proppant in the annulus between the blind pipe and the casing. The calculation of the mass of the proppant in the annulus between the blind pipe and the casing based on the volume of the sand slurry further includes: calculating the mass of the proppant in a unit volume of slurry based on the mass of the proppant in a unit volume of bottom hole clean fluid; and calculating the mass of the proppant in the annulus between the blind pipe and the casing based on the mass of the proppant in a unit volume of slurry and the volume of the sand slurry.

8. A computing device, comprising: The processor, memory, communication interface, and communication bus are provided, wherein the processor, memory, and communication interface communicate with each other via the communication bus. The memory is used to store at least one executable instruction that causes the processor to perform the operation corresponding to the method for obtaining the buried height of the blind tube after fracturing and filling induced sand removal as described in any one of claims 1-6.

9. A computer storage medium storing at least one executable instruction that causes a processor to perform the operation of a method for obtaining the burial height of a blind tube after fracturing and filling induced sand removal, as described in any one of claims 1-6.

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