Methods, apparatus and electronic equipment for determining the explosive load of perforation holes

Abstract

This invention discloses a method, apparatus, and electronic device for determining perforation explosion load. The method includes: acquiring the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosions of multiple perforating projectiles at a predetermined sampling time on a target position on a perforating gun; determining the comprehensive perforation explosion load generated by the multiple perforating projectiles at the target position at the predetermined sampling time based on these pressures; and determining the target perforation explosion load on the target position on the perforating gun at the predetermined sampling time based on the comprehensive perforation explosion load generated by the multiple perforating projectiles at the target position. This invention solves the technical problems of low accuracy and poor universality in related methods for determining perforation explosion load.

Description

Technical Field

[0001] This invention relates to the field of oil and gas resource exploration and development, and more specifically, to a method, apparatus, and electronic device for determining perforation explosive load. Background Technology

[0002] With the rapid development of oil and gas well production technology, perforation technology has made rapid progress. Tubing Conveyed Perforating (TCP) is a commonly used perforation method. It utilizes a jet perforator to generate a high-temperature, high-pressure metal jet that penetrates the casing, cement sheath, and formation to establish an oil and gas channel connecting the formation and the wellbore. Due to its advantages such as deep penetration, large penetration diameter, multiple thermal stages, and stratified operation, it is widely used by engineers. However, the enormous impact force generated by the jet perforator can lead to some engineering accidents. Therefore, accurate calculation of the perforation explosive load is crucial.

[0003] Currently, there are two main methods for predicting perforation explosion loads. One is the empirical method, which predicts the explosion load of the upcoming perforation based on previous perforation measurement data. This method has very low accuracy. The other is the simulation method, which involves creating a mesh model of the perforation string using finite element analysis software ANSYS or explicit dynamic analysis software LS-DYNA, and using the CJ equation to describe the detonation wave generated after the perforation projectile explodes downhole. This method lacks universality, and different models need to be created for different wells.

[0004] There is currently no effective solution to the above problems. Summary of the Invention

[0005] This invention provides a method, apparatus, and electronic device for determining perforation explosion load, to at least solve the technical problems of low accuracy and poor universality in related art methods for determining perforation explosion load.

[0006] According to one aspect of the present invention, a method for determining perforation explosion load is provided, comprising: acquiring the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosion of multiple perforation projectiles on a target position on a perforating gun at a preset sampling time; determining the comprehensive perforation explosion load generated by the multiple perforation projectiles on the target position at the preset sampling time based on the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosion of the multiple perforation projectiles on the target position; and determining the target perforation explosion load on the target position on the perforating gun at the preset sampling time based on the comprehensive perforation explosion load generated by the multiple perforation projectiles on the target position at the preset sampling time.

[0007] According to another aspect of the present invention, a perforation explosion load determination device is also provided, comprising: a first acquisition module, configured to acquire the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosion of multiple perforation projectiles on a target position on a perforating gun at a preset sampling time; a first determination module, configured to determine the comprehensive perforation explosion load generated by the multiple perforation projectiles on the target position at the preset sampling time based on the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosion of the multiple perforation projectiles on the target position; and a second determination module, configured to determine the target perforation explosion load received by the target position on the perforating gun at the preset sampling time based on the comprehensive perforation explosion load generated by the multiple perforation projectiles on the target position at the preset sampling time.

[0008] According to another aspect of the present invention, an electronic device is also provided, including one or more processors and a memory, wherein the memory is used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors cause the one or more processors to implement any of the above-described perforation explosion load determination methods.

[0009] In this embodiment of the invention, by acquiring the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosions of multiple perforating projectiles on the target position of the perforating gun at a preset sampling time; based on the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosions of multiple perforating projectiles on the target position, the comprehensive perforation explosion load generated by the multiple perforating projectiles on the target position at the preset sampling time is determined; and based on the comprehensive perforation explosion load generated by the multiple perforating projectiles on the target position at the preset sampling time, the target perforation explosion load on the target position of the perforating gun at the preset sampling time is determined, thereby achieving the purpose of accurately determining the comprehensive explosion load at a specific position on the perforating gun, thus realizing the technical effect of improving the accuracy and applicability of perforation explosion load prediction, and solving the technical problems of low accuracy and poor universality in the perforation explosion load determination methods in related technologies. Attached Figure Description

[0010] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0011] Figure 1 This is a schematic diagram of a method for determining the explosive load of a perforation according to an embodiment of the present invention;

[0012] Figure 2 This is a schematic diagram of an optional bubble pulsation according to an embodiment of the present invention;

[0013] Figure 3 This is a schematic diagram of an optional bubble pulsation pressure attenuation law according to an embodiment of the present invention;

[0014] Figure 4 This is a schematic diagram of an optional shock wave reflected on the surface of a steel body according to an embodiment of the present invention;

[0015] Figure 5 This is a schematic diagram of an optional 60° phase angle distribution of a perforating projectile according to an embodiment of the present invention;

[0016] Figure 6 This is a schematic diagram of an optional superposition of explosive loads according to an embodiment of the present invention;

[0017] Figure 7 This is a schematic diagram of an optional perforation detonation load application according to an embodiment of the present invention;

[0018] Figure 8 This is a schematic diagram of an optional wellbore structure for well A1 according to an embodiment of the present invention;

[0019] Figure 9 This is a schematic diagram illustrating the load change over time after the explosion of an optional single-perforation projectile according to an embodiment of the present invention;

[0020] Figure 10 This is a schematic diagram of an optional y-direction explosive load cloud according to an embodiment of the present invention;

[0021] Figure 11 This is a schematic diagram of an optional z-axis explosive load cloud diagram according to an embodiment of the present invention;

[0022] Figure 12 This is a schematic diagram of a perforation explosion load determination device according to an embodiment of the present invention;

[0023] Figure 13 This is a schematic diagram of an electronic device according to an embodiment of the present invention. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0025] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0026] According to an embodiment of the present invention, a method for determining the explosive load of a perforation is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0027] Figure 1 This is a flowchart of a method for determining the perforation explosion load according to an embodiment of the present invention, such as... Figure 1 As shown, the method includes the following steps:

[0028] Step S102: Obtain the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosion of multiple perforation projectiles at preset sampling times on the target position of the perforation gun.

[0029] Optionally, the perforation bombardment pressure is the pressure generated by the explosion of the perforating projectile; the bubble pulsation pressure is the pressure generated by the bubble pulsation caused by the explosion of the perforating projectile; and the explosion reflection pressure is the pressure generated by the reflected wave produced by the explosion. Based on the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure corresponding to multiple perforating projectiles at preset sampling times, the comprehensive explosive load at a specific location on the perforating gun can be determined comprehensively and accurately.

[0030] In an optional embodiment, the acquisition of the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosions of multiple perforation shells on a target position on a perforating gun at a preset sampling time includes: determining the perforation bombardment pressure generated by the explosion of any one of the multiple perforation shells on the target position at the preset sampling time by: determining the distance between the target position and any one of the perforation shells, and the explosive charge corresponding to any one of the perforation shells; and obtaining the perforation bombardment pressure generated by the explosion of any one of the perforation shells on the target position at the preset sampling time based on the distance between the target position and any one of the perforation shells, and the explosive charge corresponding to any one of the perforation shells.

[0031] Optionally, the explosive charge is equivalent to TNT. The perforation pressure generated at the target location is determined by the distance between the target location and any perforation projectile, as well as the explosive charge corresponding to any perforation projectile. The perforation pressure generated at the target location can be accurately calculated by the distance between the target location and any perforation projectile, as well as the explosive charge corresponding to any perforation projectile.

[0032] In an optional embodiment, before obtaining the perforation bombardment pressure generated by the explosion of any one of the perforating projectiles on the target location at the preset sampling time based on the distance between the target location and any one of the perforating projectiles, and the explosive charge corresponding to any one of the perforating projectiles, the method further includes: obtaining the perforation bombardment pressure generated by the explosion of any one of the perforating projectiles on the target location at the preset sampling time based on the distance between the target location and any one of the perforating projectiles, and the explosive charge corresponding to any one of the perforating projectiles, in the following manner:

[0033]

[0034] Where t is the preset sampling time, R is the distance between the target position and any of the perforation shells, P(R,t) is the perforation pressure generated by the explosion of any of the perforation shells on the target position, and P0 is the pressure in still water. Let W be the peak pressure across the shock wave front after the explosion of any of the aforementioned perforation projectiles, where W is the explosive charge corresponding to any of the aforementioned perforation projectiles. The time decay exponent, D is the time it takes for the detonation wave generated after the explosion of any of the aforementioned perforation shells to reach the aforementioned target location. i D is twice the distance from the target location to any of the aforementioned perforation holes. o Let C0 be the diameter of the perforator frame corresponding to any of the above perforating projectiles, and C0 be the speed of sound in still water.

[0035] Optionally, if the preset sampling time is less than the time it takes for the detonation wave generated after any perforation projectile explodes to travel to the target location, then the perforation bombardment pressure generated by any perforation projectile explosion at the target location is equal to the pressure in still water; if the preset sampling time is greater than the time it takes for the detonation wave generated after any perforation projectile explodes to travel to the target location, and is less than the time decay exponent, then the perforation bombardment pressure generated by any perforation projectile explosion at the target location is equal to the peak pressure of the shock wave front passing through after the explosion of any perforation projectile multiplied by e. -t / θIf the preset sampling time is greater than the time decay exponent but less than 50, then the bombardment pressure generated by the explosion of any perforation projectile at the target location is equal to 0.368 times the peak value of the shock wave front after the explosion of any perforation projectile. By judging the magnitude of the preset sampling time, the magnitude of the bombardment pressure generated by the explosion of any perforation projectile on the target position can be accurately calculated using the corresponding formula.

[0036] In an optional embodiment, the acquisition of the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosions of multiple perforation shells at a preset sampling time on a target position on a perforating gun includes: determining the bubble pulsation pressure generated by the explosion of any one of the multiple perforation shells at the preset sampling time on the target position by: determining the ammunition quantity corresponding to any one of the perforation shells and the water depth at the explosion point corresponding to any one of the perforation shells; determining the peak and minimum bubble pulsation pressure generated by the explosion of any one of the perforation shells on the target position based on the ammunition quantity corresponding to any one of the perforation shells and the water depth at the explosion point corresponding to any one of the perforation shells; determining the distance between the bubble generated by the explosion of any one of the perforation shells and the target position; and determining the bubble pulsation pressure generated by the explosion of any one of the perforation shells on the target position at the preset sampling time based on the peak and minimum bubble pulsation pressure generated by the explosion of any one of the perforation shells on the target position and the distance between the bubble generated by the explosion of any one of the perforation shells and the target position.

[0037] Optionally, the explosive volume is the volume occupied by the products of 1 kg of explosive detonation under standard conditions, and is calculated as follows:

[0038] C3H6N6O6→3H2O+3CO+3N2

[0039] V = 22.4n g

[0040] Wherein, C3H6N6O6 is cyclotrimethylenetrinitramine, H2O is water, CO is carbon monoxide, N2 is nitrogen, and n g V represents the amount of gaseous explosion products, and V is the explosion volume. After a perforating projectile explodes, it produces bubbles. These bubbles expand and contract rhythmically within the perforating fluid, creating bubble pulsations, such as... Figure 2 As shown, Figure 2This is a schematic diagram of an optional bubble pulsation according to an embodiment of the present invention. Since bubble pulsation is related to the water depth at the burst point and the distance from the burst center, a mathematical relationship is established for the dynamic pressure of the bubble pulsation. The two stages of shock wave formation and bubble pulsation are considered as the same physical phenomenon. The former stage provides the initial conditions for the latter stage, and the energy released by the first bubble pulsation accounts for 93% of the total energy of the bubble. Therefore, the influence of the first bubble pulsation is usually considered.

[0041] Optionally, the bubble pulsation pressure generated by the explosion of any perforation projectile at the preset sampling time is determined by the peak pressure and minimum pressure of the bubble pulsation generated by the explosion of any perforation projectile at the target position, as well as the distance between the bubble generated by the explosion of any perforation projectile and the target position. By calculating the peak pressure and minimum pressure of the bubble pulsation, as well as the distance between the bubble and the target position, the magnitude of the bubble pulsation pressure can be accurately obtained.

[0042] In an optional embodiment, determining the bubble pulsation pressure generated by the explosion of any one of the perforated projectiles at the target location at the preset sampling time, based on the peak and minimum bubble pulsation pressures generated by the explosion of any one of the perforated projectiles at the target location, and the distance between the bubble generated by the explosion of any one of the perforated projectiles and the target location, includes: determining the bubble pulsation pressure generated by the explosion of any one of the perforated projectiles at the target location at the preset sampling time, based on the peak and minimum bubble pulsation pressures generated by the explosion of any one of the perforated projectiles at the target location, and the distance between the bubble generated by the explosion of any one of the perforated projectiles and the target location, in the following manner:

[0043]

[0044] Where t is the preset sampling time, x is the distance between the bubble generated by the explosion of any of the perforation shells and the target position, P2 is the bubble pulsation pressure generated by the explosion of any of the perforation shells on the target position, and P min P is the minimum pressure of the bubble pulsation generated at the target location by the explosion of any of the aforementioned perforation projectiles. max t represents the peak pressure of the bubble pulsation generated at the target location by the explosion of any of the aforementioned perforation projectiles. p Let t2 be the first characteristic time point corresponding to the explosion of any of the aforementioned perforation projectiles, where t2 = 2.38 × W. 0.273 (H+10) -0.86Let t3 = 2T - t2 be the second characteristic time point of the bubble pressure corresponding to the explosion of any of the aforementioned perforation shells, W be the explosive charge corresponding to any of the aforementioned perforation shells, H be the water depth at the explosion point corresponding to any of the aforementioned perforation shells, and T = 2.11 × W be the third characteristic time point of the bubble pressure corresponding to the explosion of any of the aforementioned perforation shells. 1 / 3 (H+10.3) -5 / 6 Let be the bubble period corresponding to the explosion of any of the above perforation projectiles.

[0045] Optional, Figure 3 This is a schematic diagram of an optional bubble pulsation pressure attenuation law according to an embodiment of the present invention. Figure 3 The decay law of bubble pulsation pressure in the middle stage is as follows: If the preset sampling time is greater than the first characteristic time point of the bubble pressure corresponding to any perforation projectile explosion, and less than the second characteristic time point of the bubble pressure corresponding to any perforation projectile explosion, then the bubble pulsation pressure generated by any perforation projectile explosion at the target location is equal to the minimum bubble pulsation pressure generated by any perforation projectile explosion at the target location multiplied by sin[π(tt)]. p ) / (t2-t p If the preset sampling time is greater than the second characteristic time point of the bubble pressure corresponding to the explosion of any perforation projectile, and less than the bubble period corresponding to the explosion of any perforation projectile, then the bubble pulsation pressure generated by the explosion of any perforation projectile at the target location is equal to the peak pressure of the bubble pulsation generated by the explosion of any perforation projectile at the target location multiplied by e. -80(T-t) If the preset sampling time is greater than the bubble period corresponding to the explosion of any perforation projectile, but less than the third characteristic time point of the bubble pressure corresponding to the explosion of any perforation projectile, then the bubble pulsation pressure generated at the target location by the explosion of any perforation projectile is equal to the peak bubble pulsation pressure generated at the target location by the explosion of any perforation projectile multiplied by e. -80(t-T) By determining the magnitude of the preset sampling time, the magnitude of the bubble pulsation pressure generated at the target location by the explosion of any perforation projectile can be accurately calculated using the corresponding formula.

[0046] In an optional embodiment, determining the peak and minimum bubble pulsation pressures generated by the explosion of any one of the perforated projectiles on the target location, based on the ammunition quantity corresponding to any one of the perforated projectiles and the water depth at the explosion point corresponding to any one of the perforated projectiles, includes: determining the peak and minimum bubble pulsation pressures generated by the explosion of any one of the perforated projectiles on the target location based on the ammunition quantity corresponding to any one of the perforated projectiles and the water depth at the explosion point corresponding to any one of the perforated projectiles in the following manner:

[0047] P max =5.09×106 ×W 0.27 [ln(H+10)-2.3]

[0048]

[0049] Among them, P min P is the minimum pressure of the bubble pulsation generated at the target location by the explosion of any of the aforementioned perforation projectiles. max Let W be the peak pressure of the bubble pulsation generated at the target location by the explosion of any of the aforementioned perforation shells, W be the explosive charge corresponding to any of the aforementioned perforation shells, and H be the water depth at the explosion point corresponding to any of the aforementioned perforation shells.

[0050] Optionally, by calculating the amount of ammunition corresponding to any perforation projectile and the water depth at the explosion point corresponding to any perforation projectile according to the corresponding formula, the magnitude of the peak pressure and minimum pressure of bubble pulsation generated by the explosion of any perforation projectile at the target location can be accurately obtained.

[0051] In an optional embodiment, the acquisition of the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosions of multiple perforation projectiles at a preset sampling time on the target position of the perforating gun includes: determining the explosion reflection pressure generated by the explosion of any one of the multiple perforation projectiles at the preset sampling time on the target position by means of the following method:

[0052] P r =αP0

[0053] Among them, P r Let P0 be the explosion reflection pressure generated by the explosion of any perforation projectile at the aforementioned target location, P0 be the pressure in still water, and α (α∝[2,3]) be a predetermined multiple.

[0054] Optionally, because in a liquid, when a shock wave encounters a rigid surface, it will be reflected from the surface, such as... Figure 4 As shown, Figure 4 This is a schematic diagram of an optional shock wave reflection on the surface of a steel body according to an embodiment of the present invention. Based on the mass conservation equation and the momentum conservation equation, we can obtain:

[0055] (1) The equations for the conservation of the incident wave are as follows:

[0056]

[0057] (2) The isentropic equation for water is as follows:

[0058]

[0059] (3) The conservation equations for reflected waves are as follows:

[0060]

[0061] Solving the simultaneous equations, we can find that the explosion reflection pressure is 2 to 3 times the explosion incident pressure, that is:

[0062] P r =αP0

[0063] Where u is the velocity, Let ρ be the angle and ρ be the density. The subscript i indicates a node in the tubular column, the subscript r indicates the reflected wave, the subscript L indicates the incident wave, and the subscripts a and b indicate two different times, a and b, respectively. L,b Let u be the combined incident wave velocity of the tube at time b. i,b Let be the incident wave velocity at node i of the tubular column at time b. Let ρ be the incident wave angle at node i of the tubular column. i,b Let u be the incident wave density at node i of the tube column at time b. i,a Let be the incident wave velocity at node i of the tube column at time a. Let ρ be the combined incident wave angle of the tubular column at time a. i,a Let P be the incident wave density at node i at time a. i,a Let P be the incident wave pressure at node i of the tubing at time a. i,b Let u be the incident wave pressure at node i of the tubing at time b. r The velocity of the reflected wave, ρ is the angle of the reflected wave. r P is the reflected wave density. i,Ω The average incident wave pressure is represented by B, which is the first preset parameter, which can be obtained through experimental measurement or set as an empirical value, for example, 307.7 MPa; n is the second preset parameter, which can be obtained through experimental measurement or set as an empirical value, for example, 7.15.

[0064] Step S104: Based on the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosions of the multiple perforation projectiles on the target location, determine the combined perforation explosion load generated by the multiple perforation projectiles on the target location at the preset sampling time.

[0065] Optionally, the comprehensive perforation load generated by any one of the multiple perforating projectiles at a preset sampling time can be obtained as follows: The perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by any one of the perforating projectiles at the target location are summed to obtain the comprehensive perforation load generated by any one of the perforating projectiles at the preset sampling time. In other words, the sum of the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure is used as the comprehensive perforation load. This method makes the calculation of the perforation load more comprehensive and improves the accuracy of the calculation.

[0066] Step S106: Based on the combined perforation explosive load generated by the multiple perforation projectiles on the target position at the preset sampling time, determine the target perforation explosive load on the target position of the perforation gun at the preset sampling time.

[0067] Optionally, based on the combined perforation explosive load generated by multiple perforation projectiles at the target position at the preset sampling time, the equivalent perforation explosive load on the target position on the perforating gun at the preset sampling time can be obtained. By multiplying the equivalent perforation explosive load by a predetermined correction factor, the target perforation explosive load can be obtained accurately and comprehensively.

[0068] In an optional embodiment, determining the target perforation explosive load on the target position of the perforating gun at the preset sampling time based on the combined perforation explosive load generated by the plurality of perforation projectiles on the target position at the preset sampling time includes: determining the equivalent perforation explosive load on the target position of the perforating gun at the preset sampling time based on the combined perforation explosive load generated by the plurality of perforation projectiles on the target position at the preset sampling time; determining a predetermined correction coefficient; and obtaining the target perforation explosive load based on the equivalent perforation explosive load and the predetermined correction coefficient.

[0069] Optionally, the shock waves generated by two spherical charges of equal yield detonating simultaneously in liquid are orthogonal, equivalent to a shock wave being reflected back from a rigid surface symmetrical to it, such as... Figure 6 As shown, Figure 6 This is a schematic diagram of an optional superposition of explosive loads according to an embodiment of the present invention. Therefore, based on the principle of shock wave reflection on a rigid surface and the field distribution of explosive pressure in a liquid, the above-mentioned target perforation explosive load can be obtained in the following manner:

[0070]

[0071] Where β is the correction coefficient, P j (j = 1, 2, ..., 6) represents the equivalent perforation load generated by the j-th perforation hole of multiple perforation projectiles at the aforementioned target location. The final target perforation load is obtained by summing the equivalent perforation loads corresponding to the multiple perforation projectiles and multiplying the sum by a correction factor.

[0072] In an optional embodiment, determining the equivalent perforation explosive load on the target position of the perforating gun at the preset sampling time, based on the combined perforation explosive load generated by the plurality of perforating projectiles on the target position at the preset sampling time, includes: determining the phase angles corresponding to the explosions of the plurality of perforating projectiles; decomposing the combined perforation explosive load generated by the plurality of perforating projectiles on the target position based on the phase angles corresponding to the explosions of the plurality of perforating projectiles, a predetermined first coordinate direction, and a predetermined second coordinate direction, to obtain the first equivalent load generated by the plurality of perforating projectiles on the target position in the predetermined first coordinate direction, and the first equivalent load generated by the plurality of perforating projectiles on the target position in the predetermined first coordinate direction, respectively. The second equivalent load generated on the target position in the predetermined second coordinate direction; the first equivalent loads generated on the target position in the predetermined first coordinate direction by the plurality of perforating projectiles are summed to obtain the first perforation explosion load on the target position in the predetermined first coordinate direction at the predetermined sampling time; the second equivalent loads generated on the target position in the predetermined second coordinate direction by the plurality of perforating projectiles are summed to obtain the second perforation explosion load on the target position in the predetermined second coordinate direction at the predetermined sampling time; the equivalent perforation explosion load is determined based on the first perforation explosion load and the second perforation explosion load.

[0073] Optionally, different perforation gun phase angles result in different lateral effects on the tubing, such as... Figure 7 As shown, Figure 7 This is a schematic diagram of an optional perforation detonation load application according to an embodiment of the present invention. To facilitate the study of shock wave reflection and superposition, the perforation projectile explosion load is equivalent to the y-axis and z-axis directions. Taking a 60° phase angle as an example, as... Figure 5 As shown, Figure 5 This is a schematic diagram of an optional 60° phase angle distribution of perforating projectiles according to an embodiment of the present invention. The perforations corresponding to each perforating projectile in the diagram differ by an included angle of 60°. The equivalent perforation explosion load is obtained by the following method:

[0074]

[0075]

[0076]

[0077] The combined perforation explosion load corresponding to multiple perforation projectiles is decomposed based on the phase angle along the y-axis and z-axis, resulting in the equivalent loads generated by the multiple perforation projectiles on the target position in the y-axis and z-axis directions.

[0078] Optionally, the predetermined first coordinate direction is the y-axis direction, and the predetermined second coordinate direction is the z-axis direction. The combined perforation explosion load corresponding to multiple perforation projectiles is decomposed according to the predetermined first coordinate direction and the predetermined second coordinate direction based on the phase angle. This yields the first equivalent load generated by the multiple perforation projectiles on the target position in the predetermined first coordinate direction and the second equivalent load generated by the multiple perforation projectiles on the target position in the predetermined second coordinate direction. These are then superimposed according to the predetermined first coordinate direction and the predetermined second coordinate direction to obtain the first perforation explosion load on the target position in the predetermined first coordinate direction at the predetermined sampling time and the second perforation explosion load on the target position in the predetermined second coordinate direction at the predetermined sampling time. The first perforation explosion load and the second perforation explosion load are added together to obtain the equivalent perforation explosion load. The purpose of this method is to eliminate the interference of directional factors on the calculation of the equivalent perforation explosion load and improve the calculation accuracy.

[0079] Through the above steps S102 to S106, the comprehensive explosive load at a specific location on the perforating gun can be accurately determined, thereby improving the accuracy and applicability of perforation explosive load prediction and solving the technical problems of low accuracy and poor universality in the perforation explosive load determination methods in related technologies.

[0080] Based on the above embodiments and optional embodiments, the present invention proposes an optional perforation explosion load determination method, the method comprising:

[0081] Step S1: Establish a model for the load distribution over time after the explosion of any perforation projectile:

[0082]

[0083] Where t is the preset sampling time, R is the distance between the target position and any of the perforation shells, P(R,t) is the perforation pressure generated by the explosion of any of the perforation shells on the target position, and P0 is the pressure in still water. Let W be the peak pressure across the shock wave front after the explosion of any of the aforementioned perforation projectiles, where W is the explosive charge corresponding to any of the aforementioned perforation projectiles. The time decay exponent, D is the time it takes for the detonation wave generated after the explosion of any of the aforementioned perforation shells to reach the aforementioned target location. i D is twice the distance from the target location to any of the aforementioned perforation holes. o Let C0 be the diameter of the perforator frame corresponding to any of the above perforating projectiles, and C0 be the speed of sound in still water.

[0084] Step S2: Determine the distance between the target location and any perforation projectile, as well as the explosive charge corresponding to any perforation projectile. Using the load distribution model of any perforation projectile after explosion over time, obtain the perforation bombardment pressure generated by the explosion of any perforation projectile on the target location at the preset sampling time.

[0085] Step S3: Based on the amount of ammunition corresponding to any perforation projectile and the water depth at the explosion point corresponding to any perforation projectile, the peak pressure and minimum pressure of bubble pulsation generated by the explosion of any perforation projectile at the target location are obtained in the following manner.

[0086] P max =5.09×10 6 ×W 0.27 [ln(H+10)-2.3]

[0087]

[0088] Among them, P min P is the minimum pressure of the bubble pulsation generated at the target location by the explosion of any of the aforementioned perforation projectiles. max Let W be the peak pressure of the bubble pulsation generated at the target location by the explosion of any of the aforementioned perforation shells, W be the explosive charge corresponding to any of the aforementioned perforation shells, and H be the water depth at the explosion point corresponding to any of the aforementioned perforation shells.

[0089] Step S4: Determine the distance between the bubble generated by the explosion of any perforation projectile and the target location.

[0090] Step S5, establish the bubble pulsating pressure model:

[0091]

[0092] Where t is the preset sampling time, x is the distance between the bubble generated by the explosion of any of the perforation shells and the target position, P2 is the bubble pulsation pressure generated by the explosion of any of the perforation shells on the target position, and P min P is the minimum pressure of the bubble pulsation generated at the target location by the explosion of any of the aforementioned perforation projectiles. max t represents the peak pressure of the bubble pulsation generated at the target location by the explosion of any of the aforementioned perforation projectiles. p Let t2 be the first characteristic time point corresponding to the explosion of any of the aforementioned perforation projectiles, where t2 = 2.38 × W. 0.273 (H+10) -0.86Let t3 = 2T - t2 be the second characteristic time point of the bubble pressure corresponding to the explosion of any of the aforementioned perforation shells, W be the explosive charge corresponding to any of the aforementioned perforation shells, H be the water depth at the explosion point corresponding to any of the aforementioned perforation shells, and T = 2.11 × W be the third characteristic time point of the bubble pressure corresponding to the explosion of any of the aforementioned perforation shells. 1 / 3 (H+10.3) -5 / 6 Let be the bubble period corresponding to the explosion of any of the above perforation projectiles.

[0093] Step S6: Based on the peak pressure and minimum pressure of bubble pulsation generated by the explosion of any perforation projectile at the target location, and the distance between the bubble generated by the explosion of any perforation projectile and the target location, the bubble pulsation pressure generated by the explosion of any perforation projectile at the target location at the preset sampling time is determined by the bubble pulsation pressure model.

[0094] Step S7: Establish an explosion reflection model based on the mass conservation equation and the momentum conservation equation:

[0095] P r =αP0, α∝[2,3]

[0096] Among them, P r Let P0 be the explosion reflection pressure generated by the explosion of any perforation projectile at the aforementioned target location, P0 be the pressure in still water, and α (α∝[2,3]) be a predetermined multiple.

[0097] Step S8: Determine the explosion reflection pressure on the target location generated by the explosion of any one of the multiple perforated projectiles at the preset sampling time based on the explosion reflection model.

[0098] Step S9: Sum the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosion of any perforation projectile at the target location to obtain the comprehensive perforation explosion load generated by any perforation projectile at the target location at a preset sampling time.

[0099] Step S10: The combined perforation explosion load corresponding to the multiple perforation projectiles is decomposed based on the phase angle according to the predetermined first coordinate direction y-axis and the predetermined second coordinate direction z-axis to obtain the first equivalent load and the second equivalent load generated by the multiple perforation projectiles on the target position in the predetermined first coordinate direction and the predetermined second coordinate direction, respectively.

[0100] Step S11: Summing the first equivalent load generated by multiple perforating projectiles on the target position in a predetermined first coordinate direction to obtain the first perforation explosion load; summing the second equivalent load generated by multiple perforating projectiles on the target position in a predetermined second coordinate direction to obtain the second perforation explosion load.

[0101] Step S12: Add the first perforation explosion load and the second perforation explosion load to obtain the equivalent perforation explosion load.

[0102] Step S13, establish the explosion load superposition model:

[0103]

[0104] Where β is the correction coefficient, P j (j = 1, 2, ..., 6) represents the equivalent perforation load generated by the j-th perforation hole of multiple perforation projectiles at the aforementioned target location. The final target perforation load is obtained by summing the equivalent perforation loads corresponding to the multiple perforation projectiles and multiplying the sum by a correction factor.

[0105] The embodiments of this invention can achieve at least the following technical effects: 1. Based on the charge and type of a single perforating projectile, a predictive model is established to show the change of the explosive load of any perforating projectile with time and detonation distance; combined with the pulsating pressure and period of the bubble generated by the explosion, as well as the reflection and superposition of the explosion shock wave in the annulus, a mathematical model for predicting the explosive load of the perforating projectile is obtained; considering the length of the perforating gun, the phase angle of the perforating projectile, and the perforation density, a mathematical model for the distribution of the perforating projectile is established, and the explosive load of the perforating projectile is applied to the perforating gun to obtain a predictive model for the explosive load of the perforating gun, which can accurately predict the distribution of the explosive load on the entire perforating gun with time. 2. During perforation operations, based on data such as the charge, type of explosive, detonation distance, length of the perforating gun, phase angle, and perforation density, the direction and magnitude of the explosive load on the perforating gun can be predicted, so as to analyze the vibration intensity of the perforating string during the operation and assist in designing appropriate perforation parameters.

[0106] Based on steps S1 to S13 above, the present invention proposes another optional implementation method, specifically including:

[0107] This embodiment is based on data from a single well (referred to as Well A1), whose wellbore structure is as follows: Figure 8 As shown, Figure 8 This is a schematic diagram of an optional wellbore structure for Well A1 according to an embodiment of the present invention. Well A1 has six perforations, each with a perforation depth of 11m. The relevant perforation parameters are as follows:

[0108]

[0109] Using a perforation explosion load prediction model, the load variation over time after the explosion of a single perforation projectile is predicted, such as... Figure 9 As shown, Figure 9This is a schematic diagram illustrating the load change over time after the explosion of an optional single perforating projectile according to an embodiment of the present invention. It can be seen that the perforating projectile reaches a peak positive pressure within a fraction of a millisecond after the explosion, then gradually decreases to a peak negative pressure over time, subsequently increasing again before finally decreasing to zero. This is because the expansion and contraction of the bubbles generated by the explosion in the annulus causes the pressure inside the tube to rise and fall, resulting in the pressure change trend shown in the diagram.

[0110] Considering the distribution of the perforating projectile, the explosive load is decomposed, resulting in the lateral load on the perforating gun in the Cartesian coordinate system, as follows: Figure 10 and Figure 11 , Figure 10 This is a schematic diagram of an optional y-axis explosive load cloud diagram according to an embodiment of the present invention. Figure 11 This is a schematic diagram of an optional z-axis explosive load cloud map according to an embodiment of the present invention. It can be seen that the explosive load exhibits a sinusoidal distribution in the y-axis of the perforating gun and a cosine distribution in the z-axis. That is, after the perforating projectile explodes, the perforating gun will be subjected to periodic external forces in both the y and z directions. Under the action of these external forces, the perforating gun will vibrate violently, thereby causing vibration of the entire perforation string. Based on the established perforation explosive load prediction model, the present invention can accurately obtain the distribution of explosive loads on the perforating gun, providing a theoretical basis for perforation parameter design and maximizing the safety of the perforation string.

[0111] This embodiment also provides a perforation explosion load determination device, which is used to implement the above embodiments and preferred embodiments, and will not be repeated as already described. As used below, the terms "module" and "device" can refer to a combination of software and / or hardware that performs a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0112] According to an embodiment of the present invention, an apparatus embodiment for implementing the above-described method for determining the perforation explosion load is also provided. Figure 12 This is a schematic diagram of a perforation explosion load determination device according to an embodiment of the present invention, as shown below. Figure 12 As shown, the above-mentioned perforation explosion load determination device includes: a first acquisition module 122, a first determination module 124, and a second determination module 126, wherein:

[0113] The first acquisition module 122 mentioned above is used to acquire the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosion of multiple perforation projectiles on the target position on the perforation gun at a preset sampling time.

[0114] The first determining module 124 is connected to the first acquiring module 122 and is used to determine the comprehensive perforation explosion load generated by the multiple perforation projectiles on the target position at the preset sampling time based on the perforation bombardment pressure, bubble pulsation pressure and explosion reflection pressure generated by the multiple perforation projectiles on the target position respectively.

[0115] The second determining module 126 is connected to the first determining module 124 and is used to determine the target perforation explosive load on the target position of the perforating gun at the preset sampling time based on the comprehensive perforation explosive load generated by the multiple perforation projectiles on the target position at the preset sampling time.

[0116] It should be noted that the above modules can be implemented by software or hardware. For example, for the latter, it can be implemented in the following ways: the above modules can be located in the same processor; or the above modules can be located in different processors in any combination.

[0117] It should be noted that the first acquisition module 122, the first determination module 124, and the second determination module 126 mentioned above correspond to steps S102 to S106 in the embodiments. The instances and application scenarios implemented by the above modules and their corresponding steps are the same, but they are not limited to the content disclosed in the above embodiments. It should be noted that the above modules, as part of the device, can run in a computer terminal.

[0118] It should be noted that the optional or preferred implementation methods of this embodiment can be found in the relevant descriptions in the embodiments, and will not be repeated here.

[0119] The aforementioned perforation explosion load determination device may further include a processor and a memory. The first acquisition module 122, the first determination module 124, the second determination module 126, etc., are all stored in the memory as program modules, and the processor executes the aforementioned program modules stored in the memory to realize the corresponding functions.

[0120] The processor contains a core that retrieves the corresponding program modules from memory. One or more cores may be configured. Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory includes at least one memory chip.

[0121] According to an embodiment of this application, an embodiment of a non-volatile storage medium is also provided. Optionally, in this embodiment, the non-volatile storage medium includes a stored program, wherein, when the program is running, it controls the device containing the non-volatile storage medium to execute any of the perforation explosion load determination methods.

[0122] Optionally, in this embodiment, the non-volatile storage medium may be located in any computer terminal in a group of computer terminals in a computer network, or in any mobile terminal in a group of mobile terminals, and the non-volatile storage medium includes stored programs.

[0123] Optionally, during program execution, the device containing the non-volatile storage medium is controlled to perform the following functions: acquire the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosions of multiple perforating projectiles on the target position of the perforating gun at a preset sampling time; based on the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosions of the multiple perforating projectiles on the target position, determine the comprehensive perforation explosion load generated by the multiple perforating projectiles on the target position at the preset sampling time; and based on the comprehensive perforation explosion load generated by the multiple perforating projectiles on the target position at the preset sampling time, determine the target perforation explosion load received by the target position on the perforating gun at the preset sampling time.

[0124] According to an embodiment of this application, an embodiment of a processor is also provided. Optionally, in this embodiment, the processor is used to run a program, wherein the program executes any of the perforation explosion load determination methods described above.

[0125] According to an embodiment of this application, an embodiment of a computer program product is also provided, which, when executed on a data processing device, is adapted to execute a program that initializes the perforation explosion load determination method steps described above.

[0126] Optionally, when the aforementioned computer program product is executed on a data processing device, it is suitable to execute an initialization program having the following method steps: acquiring the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosions of multiple perforation projectiles on the target position of the perforating gun at a preset sampling time; determining the comprehensive perforation explosion load generated by the multiple perforation projectiles on the target position at the preset sampling time based on the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosions of the multiple perforation projectiles on the target position; and determining the target perforation explosion load received by the target position on the perforating gun at the preset sampling time based on the comprehensive perforation explosion load generated by the multiple perforation projectiles on the target position.

[0127] like Figure 13As shown, an embodiment of the present invention provides an electronic device 10, which includes a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, it performs the following steps: acquiring the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosion of multiple perforation shells on a target position on a perforating gun at a preset sampling time; determining the comprehensive perforation explosion load generated by the multiple perforation shells on the target position at the preset sampling time based on the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosion of the multiple perforation shells on the target position; and determining the target perforation explosion load received by the target position on the perforating gun at the preset sampling time based on the comprehensive perforation explosion load generated by the multiple perforation shells on the target position at the preset sampling time.

[0128] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0129] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of modules described above can be a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, or indirect coupling or communication connection between modules, and may be electrical or other forms.

[0130] The modules described above as separate components may or may not be physically separate. Similarly, the components shown as modules may or may not be physical modules; they may be located in one place or distributed across multiple modules. Some or all of the modules can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0131] Furthermore, the functional modules in the various embodiments of the present invention can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module. The integrated modules described above can be implemented in hardware or as software functional modules.

[0132] If the aforementioned integrated modules are implemented as software functional modules and sold or used as independent products, they can be stored in a computer-readable non-volatile storage medium. Based on this understanding, the technical solution of this invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a non-volatile storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this invention. The aforementioned non-volatile storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0133] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for determining the explosive load of a perforation, characterized in that, include: The perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosion of multiple perforating projectiles at a preset sampling time on the target position on the perforating gun are obtained. The bubble pulsation pressure is determined based on the water depth at the explosion point corresponding to the perforating projectile. Based on the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosions of the multiple perforating projectiles at the target location, the combined perforation explosion load generated by the multiple perforating projectiles at the target location at the preset sampling time is determined. Based on the combined perforation explosive load generated by the multiple perforation projectiles at the target position at the preset sampling time, the target perforation explosive load on the perforating gun at the preset sampling time is determined, including: determining the phase angle corresponding to the explosion of the multiple perforation projectiles; decomposing the combined perforation explosive load generated by the multiple perforation projectiles at the target position based on the phase angle corresponding to the explosion of the multiple perforation projectiles, a predetermined first coordinate direction, and a predetermined second coordinate direction, to obtain a first equivalent load generated by the multiple perforation projectiles at the target position in the predetermined first coordinate direction, and a second equivalent load generated by the multiple perforation projectiles at the target position in the predetermined second coordinate direction; and decomposing the combined perforation explosive load generated by the multiple perforation projectiles at the target position in the predetermined second coordinate direction. The first equivalent load generated at the target position in a predetermined first coordinate direction is summed to obtain the first perforation explosive load at the target position in the predetermined first coordinate direction at the predetermined sampling time; the second equivalent loads generated at the target position in the predetermined second coordinate direction by the plurality of perforating projectiles are summed to obtain the second perforation explosive load at the target position in the predetermined second coordinate direction at the predetermined sampling time; based on the first perforation explosive load and the second perforation explosive load, the equivalent perforation explosive load at the target position on the perforating gun at the predetermined sampling time is determined; a predetermined correction coefficient is determined; based on the equivalent perforation explosive load and the predetermined correction coefficient, the target perforation explosive load is obtained.

2. The method according to claim 1, characterized in that, The acquisition of the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosion of multiple perforation projectiles at a preset sampling time on the target position of the perforating gun includes: The perforation pressure exerted on the target location by the explosion of any one of the multiple perforation projectiles at the preset sampling time is determined by the following method: Determine the distance between the target location and any one of the perforation projectiles, as well as the amount of explosives corresponding to any one of the perforation projectiles; Based on the distance between the target location and any one of the perforating projectiles, and the amount of explosive corresponding to any one of the perforating projectiles, the perforation bombardment pressure generated by the explosion of any one of the perforating projectiles on the target location at the preset sampling time is obtained.

3. The method according to claim 2, characterized in that, Before obtaining the perforation bombardment pressure exerted on the target location by the explosion of any one of the perforating projectiles at the preset sampling time, based on the distance between the target location and any one of the perforating projectiles, and the explosive charge corresponding to any one of the perforating projectiles, the method further includes: Based on the distance between the target location and any of the perforating projectiles, and the explosive charge of any of the perforating projectiles, the perforation pressure exerted on the target location by the explosion of any of the perforating projectiles at the preset sampling time is obtained as follows: ； Where t is the preset sampling time, and R is the distance between the target position and any of the perforated projectiles. The borehole pressure generated by the explosion of any one of the perforation shells on the target location. The pressure in still water, Let be the peak pressure through which the shock wave front passes after the explosion of any of the perforated projectiles, where The amount of explosive corresponding to any one of the perforation shells. The time decay exponent, The time it takes for the detonation wave generated after the explosion of any of the perforated projectiles to reach the target location. The distance from the target location to any of the firing holes is twice the distance of the projectile. The diameter of the perforator frame corresponding to any given perforating projectile. The speed of sound in still water.

4. The method according to claim 1, characterized in that, The acquisition of the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosion of multiple perforation projectiles at a preset sampling time on the target position of the perforating gun includes: The bubble pulsation pressure generated at the target location by the explosion of any one of the multiple perforation projectiles at the preset sampling time is determined as follows: Determine the amount of ammunition corresponding to any one of the perforation shells, and the water depth at the explosion point corresponding to any one of the perforation shells; Based on the amount of ammunition corresponding to any one of the perforation shells and the water depth at the explosion point corresponding to any one of the perforation shells, determine the peak pressure and minimum pressure of bubble pulsation generated by the explosion of any one of the perforation shells on the target location. Determine the distance between the bubble generated by the explosion of any one of the perforation shells and the target location; Based on the peak and minimum pressure of bubble pulsation generated by the explosion of any one of the perforating projectiles at the target location, and the distance between the bubble generated by the explosion of any one of the perforating projectiles and the target location, the pressure of bubble pulsation generated by the explosion of any one of the perforating projectiles at the target location at the preset sampling time is determined.

5. The method according to claim 4, characterized in that, The determination of the bubble pulsation pressure generated by the explosion of any one of the perforating projectiles at the target location at the preset sampling time, based on the peak and minimum bubble pulsation pressures generated by the explosion of any one of the perforating projectiles at the target location, and the distance between the bubble generated by the explosion of any one of the perforating projectiles and the target location, includes: Based on the peak and minimum bubble pulsation pressures generated by the explosion of any one of the perforating projectiles at the target location, and the distance between the bubble generated by the explosion of any one of the perforating projectiles and the target location, the bubble pulsation pressure generated by the explosion of any one of the perforating projectiles at the target location at the preset sampling time is determined in the following manner: ； Where t is the preset sampling time, and x is the distance between the bubble generated by the explosion of any one of the perforation shells and the target position. The pressure of the bubble pulsation generated at the target location by the explosion of any one of the perforation projectiles. The minimum pressure of the bubble pulsation generated at the target location by the explosion of any one of the perforation projectiles. The peak pressure of the bubble pulsation generated at the target location by the explosion of any one of the perforation projectiles. The first characteristic time point is the bubble pressure corresponding to the explosion of any of the perforated projectiles. The second characteristic time point is the bubble pressure corresponding to the explosion of any of the perforated projectiles. Let H be the explosive charge for any given perforation projectile, and H be the water depth at the detonation point for any given perforation projectile. The third characteristic time point is the bubble pressure corresponding to the explosion of any of the perforated projectiles. The bubble period corresponds to the explosion of any one of the perforated projectiles.

6. The method according to claim 4, characterized in that, The determination of the peak and minimum pressure of bubble pulsation generated by the explosion of any given perforation projectile at the target location, based on the ammunition quantity corresponding to any given perforation projectile and the water depth at the explosion point corresponding to any given perforation projectile, includes: Based on the ammunition quantity corresponding to any given perforation projectile and the water depth at the explosion point corresponding to any given perforation projectile, the peak pressure and minimum pressure of bubble pulsation generated by the explosion of any given perforation projectile at the target location are determined in the following manner: ； in, The minimum pressure of the bubble pulsation generated at the target location by the explosion of any one of the perforation projectiles. The peak pressure of the bubble pulsation generated at the target location by the explosion of any one of the perforation projectiles. H represents the explosive charge amount corresponding to any given perforation projectile, and H represents the water depth at the explosion point corresponding to any given perforation projectile.

7. The method according to claim 1, characterized in that, The acquisition of the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosion of multiple perforation projectiles at a preset sampling time on the target position of the perforating gun includes: The explosion reflection pressure on the target location generated by the explosion of any one of the multiple perforated projectiles at the preset sampling time is determined by the following method: ； in, The explosion reflection pressure generated at the target location by the explosion of any perforation projectile is given by the projectile. The pressure in still water, For a predetermined multiple, .

8. A device for determining the explosive load of a perforation hole, characterized in that, include: The first acquisition module is used to acquire the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosion of multiple perforating projectiles on the target position on the perforating gun at a preset sampling time, wherein the bubble pulsation pressure is determined based on the water depth at the explosion point corresponding to the perforating projectile. The first determining module is used to determine the combined perforation explosion load generated by the multiple perforation projectiles on the target position at the preset sampling time based on the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosion of the multiple perforation projectiles on the target position respectively. The second determining module is used to determine the target perforation explosive load on the perforating gun at the preset sampling time based on the combined perforation explosive load generated by the plurality of perforation projectiles on the target position at the preset sampling time. This includes: determining the phase angles corresponding to the explosions of the plurality of perforation projectiles; decomposing the combined perforation explosive load generated by the plurality of perforation projectiles on the target position based on the phase angles corresponding to the explosions of the plurality of perforation projectiles, a predetermined first coordinate direction, and a predetermined second coordinate direction, to obtain a first equivalent load generated by the plurality of perforation projectiles on the target position in the predetermined first coordinate direction, and a second equivalent load generated by the plurality of perforation projectiles on the target position in the predetermined second coordinate direction; and decomposing the combined perforation explosive load generated by the plurality of perforation projectiles on the target position in the predetermined second coordinate direction. The first equivalent load generated at the target position in the predetermined first coordinate direction is summed to obtain the first perforation explosive load at the target position in the predetermined first coordinate direction at the preset sampling time; the second equivalent load generated at the target position in the predetermined second coordinate direction by the plurality of perforating projectiles is summed to obtain the second perforation explosive load at the target position in the predetermined second coordinate direction at the preset sampling time; based on the first perforation explosive load and the second perforation explosive load, the equivalent perforation explosive load at the target position on the perforating gun at the preset sampling time is determined; a predetermined correction coefficient is determined; based on the equivalent perforation explosive load and the predetermined correction coefficient, the target perforation explosive load is obtained.

9. An electronic device, characterized in that, It includes one or more processors and a memory, the memory being used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors cause the one or more processors to implement the perforation explosion load determination method according to any one of claims 1 to 7.

Images