Perforation explosion load determination method and device and electronic equipment

Abstract

The invention discloses a perforation explosion load determination method and device and electronic equipment. The method comprises the following steps: acquiring perforation bombardment pressure, bubble pulsating pressure and explosion reflection pressure generated by explosion of a plurality of perforating bullets on a target position on a perforating gun at a preset sampling moment; based on perforation detonation pressure, bubble pulsating pressure and explosion reflection pressure generated by explosion of the multiple perforating bullets on the target position, comprehensive perforation explosion loads generated by the multiple perforating bullets on the target position at the preset sampling moment are determined; and according to the comprehensive perforation explosion load generated by the multiple perforating bullets on the target position at the preset sampling moment, the target perforation explosion load borne by the target position on the perforating gun at the preset sampling moment is determined. According to the method and the device, the technical problems of low accuracy and poor universality of a perforation explosion load determination method in related technologies are solved.

Description

Technical Field

[0001] The present invention relates to the field of oil and gas resource exploration and development, and in particular to a method and device for determining a perforating explosion load, and electronic equipment. Background Art

[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 uses the high-temperature and high-pressure metal jet generated by the jet perforator to penetrate the casing, cement ring 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 heat stages and layered operation, it is widely used by engineers. However, the huge impact force generated by the jet perforator may cause some engineering accidents. Therefore, it becomes very important to accurately calculate the perforation explosion load.

[0003] There are two main methods for predicting the explosion load of perforating. One is the empirical summary method, which predicts the explosion load of the well to be perforated based on the measurement data of previous perforations. This method has a very low accuracy rate. The other is the simulation method, which is to establish a mesh model of the perforating string based on the finite element analysis software ANSYS or the explicit dynamics analysis software LS-DYNA, and use the CJ equation to describe the detonation wave generated by the explosion of the perforating bullet in the well. This method is not universal and needs to be remodeled for different wells.

[0004] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0005] The embodiments of the present invention provide a method, device and electronic device for determining a perforating explosion load, so as to at least solve the technical problems of low accuracy and poor universality existing in the method for determining a perforating explosion load in the related art.

[0006] According to one aspect of an embodiment of the present invention, a method for determining a perforating explosion load is provided, comprising: obtaining perforating bombardment pressure, bubble pulsation pressure, and explosion reflection pressure respectively generated by explosions of multiple perforating bullets on a target position on a perforating gun at a preset sampling moment; determining a comprehensive perforating explosion load respectively generated by the multiple perforating bullets on the target position at the preset sampling moment based on the perforating bombardment pressure, bubble pulsation pressure, and explosion reflection pressure respectively generated by the explosions of the multiple perforating bullets on the target position; determining a target perforating explosion load received by the target position on the perforating gun at the preset sampling moment based on the comprehensive perforating explosion load respectively generated by the multiple perforating bullets on the target position at the preset sampling moment.

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

[0008] According to another aspect of an embodiment of the present invention, there is also provided an electronic device, comprising 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 implement any one of the above-mentioned perforation explosion load determination methods.

[0009] In an embodiment of the present invention, the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosions of multiple perforating bullets at a preset sampling moment on a target position on a perforating gun are obtained; based on the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosions of the multiple perforating bullets at the target position, the comprehensive perforation explosion load generated by the multiple perforating bullets at the preset sampling moment on the target position is determined; according to the comprehensive perforation explosion load generated by the multiple perforating bullets at the preset sampling moment on the target position, the target perforation explosion load received by the target position on the perforating gun at the preset sampling moment is determined, thereby achieving the purpose of accurately determining the comprehensive explosion load at a specific position on the perforating gun, thereby achieving the technical effect of improving the accuracy and applicability of perforation explosion load prediction, and further solving the technical problems of low accuracy and poor universality of the perforation explosion load determination method in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

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

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

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

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

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

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

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

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

[0019] Fig. 9 is a schematic diagram of load variation over time after explosion of a single perforating charge according to an optional embodiment of the present invention;

[0020] Fig.10 is a schematic diagram of an optional y-direction explosion load cloud diagram according to an embodiment of the present invention;

[0021] Fig.11 is a schematic diagram of an optional z-direction explosion load cloud diagram according to an embodiment of the present invention;

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

[0023] Fig.13 is a schematic diagram of an electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work 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 and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

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

[0027] Figure 1 is a flow chart of a method for determining perforating explosion load according to an embodiment of the present invention. Figure 1 As shown, the method comprises the following steps:

[0028] Step S102, obtaining the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosion of multiple perforating charges at the target position on the perforating gun at the preset sampling time.

[0029] Optionally, the perforating bombardment pressure is the pressure generated by the explosion of the perforating bullet; the bubble pulsation pressure is the pressure generated by the bubble pulsation caused by the explosion of the perforating bullet; and the explosion reflection pressure is the pressure generated by the reflection wave generated by the explosion. Based on the perforating bombardment pressure, bubble pulsation pressure, and explosion reflection pressure corresponding to multiple perforating bullets at the preset sampling time, the comprehensive explosion load at a specific position on the perforating gun can be comprehensively and accurately determined.

[0030] In an optional embodiment, the obtaining of the perforating bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosions of multiple perforating bullets at the preset sampling moment on the target position on the perforating gun comprises: determining the perforating bombardment pressure generated by any one of the multiple perforating bullet explosions at the preset sampling moment on the target position by: determining the distance between the target position and any one of the perforating bullets, and the amount of explosive corresponding to any one of the perforating bullets; obtaining the perforating bombardment pressure generated by any one of the perforating bullet explosions at the preset sampling moment on the target position based on the distance between the target position and any one of the perforating bullets, and the amount of explosive corresponding to any one of the perforating bullets.

[0031] Optionally, the amount of explosive is a TNT explosion equivalent, and the perforating bombardment pressure generated at the target position is determined by the distance between the target position and any perforating bullet, and the amount of explosive corresponding to any perforating bullet. The perforating bombardment pressure generated at the target position can be accurately calculated through the distance between the target position and any perforating bullet, and the amount of explosive corresponding to any perforating bullet.

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

[0033]

[0034] Wherein, t is the preset sampling time, R is the distance between the target position and any one of the perforating bullets, P(R,t) is the perforating bombardment pressure generated by the explosion of any one of the perforating bullets on the target position, P0 is the pressure in still water, is the peak pressure of the shock wave front after any of the above perforating bullets explode, where W is the amount of explosives corresponding to any of the above perforating bullets, is the time decay exponent, is the time it takes for the detonation wave generated by any of the above perforating bullets to reach the above target position, D i is twice the distance from the target position to any of the above perforating bullets, D o is the diameter of the perforator rack corresponding to any of the above perforating charges, and C0 is the speed of sound in still water.

[0035] Optionally, if the preset sampling time is less than the time for the detonation wave generated by any perforating bullet to be transmitted to the target position after the explosion, the perforating bombardment pressure generated by any perforating bullet explosion on the target position is equal to the pressure in still water; if the preset sampling time is greater than the time for the detonation wave generated by any perforating bullet explosion to be transmitted to the target position and is less than the time decay exponent, the perforating bombardment pressure generated by any perforating bullet explosion on the target position is equal to the peak pressure of the shock wave front after any perforating bullet explosion multiplied by e -t / θIf the preset sampling time is greater than the time decay exponent and less than 50, the perforating bombardment pressure generated by any perforating charge explosion on the target position is equal to 0.368 times the peak value of the shock wave front passing through after any perforating charge explosion. By judging the size of the preset sampling moment, the size of the perforating bombardment pressure generated by any perforating bullet explosion on the target position can be accurately calculated using the corresponding formula.

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

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

[0038] C3H6N6O6→3H2O+3CO+3N2

[0039] V=22.4n g

[0040] Among them, C3H6N6O6 is cyclotrimethylene trinitramine, H2O is water, CO is carbon monoxide, N2 is nitrogen, g is the amount of gas explosion product, and V is the explosion volume. After the perforating bullet explodes, bubbles will be generated. The bubbles will expand and contract regularly in the perforating fluid, forming bubble pulsation, such as Figure 2 As shown, Figure 2Schematic diagram of an optional bubble pulsation according to an embodiment of the present invention. Since the bubble pulsation is related to the water depth of the explosion point and the distance from the explosion center, a mathematical relationship of the dynamic pressure of the bubble pulsation is established. The two stages of shock wave formation and bubble pulsation are regarded 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 any perforating bullet explosion at the target position at the preset sampling moment is determined by the bubble pulsation peak pressure and the bubble pulsation minimum pressure generated by any perforating bullet explosion at the target position, and the distance between the bubble generated by any perforating bullet explosion and the target position. By calculating the bubble pulsation peak pressure and the bubble pulsation minimum pressure, as well as the distance between the bubble and the target position, the size of the bubble pulsation pressure can be accurately obtained.

[0042] In an optional embodiment, the bubble pulsation pressure generated by any one of the perforating bullet explosions at the target position at the preset sampling time is determined based on the bubble pulsation peak pressure and the bubble pulsation minimum pressure generated by any one of the perforating bullet explosions at the target position, and the distance between the bubble generated by any one of the perforating bullet explosions and the target position, including: based on the bubble pulsation peak pressure and the bubble pulsation minimum pressure generated by any one of the perforating bullet explosions at the target position, and the distance between the bubble generated by any one of the perforating bullet explosions and the target position, the bubble pulsation pressure generated by any one of the perforating bullet explosions at the target position at the preset sampling time is determined in the following manner:

[0043]

[0044] Wherein, t is the preset sampling time, x is the distance between the bubble generated by the explosion of any of the perforating bullets and the target position, P2 is the bubble pulsation pressure generated by the explosion of any of the perforating bullets on the target position, and P min is the minimum pressure of bubble pulsation generated by any of the above perforating bullets at the above target position, P max is the peak pressure of bubble pulsation caused by any of the above perforating charges at the above target position, t p is the first characteristic time point of the bubble pressure corresponding to any of the above perforating charges explosion, t2 = 2.38 × W 0.273 (H+10) -0.86is the second characteristic time point of the bubble pressure corresponding to the explosion of any of the above perforating bullets, W is the amount of explosives corresponding to any of the above perforating bullets, H is the water depth of the explosion point corresponding to any of the above perforating bullets, t3=2T-t2 is the third characteristic time point of the bubble pressure corresponding to the explosion of any of the above perforating bullets, T=2.11×W 1 / 3 (H+10.3) -5 / 6 is the bubble period corresponding to any of the above perforating bullet explosions.

[0045] Optional, Figure 3 is a schematic diagram of an optional bubble pulsation pressure attenuation law according to an embodiment of the present invention. Figure 3 The attenuation law of the bubble pulsation pressure in the bubble pulsation stage is as follows: if the preset sampling time is greater than the first characteristic time point of the bubble pressure corresponding to any perforating bullet explosion and less than the second characteristic time point of the bubble pressure corresponding to any perforating bullet explosion, then the bubble pulsation pressure generated by any perforating bullet explosion at the target position is equal to the minimum bubble pulsation pressure generated by any perforating bullet explosion at the target position 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 any perforating bullet explosion and less than the bubble period corresponding to any perforating bullet explosion, then the bubble pulsation pressure generated by any perforating bullet explosion at the target position is equal to the bubble pulsation peak pressure generated by any perforating bullet explosion at the target position multiplied by e -80(T-t) If the preset sampling time is greater than the bubble period corresponding to any perforating bullet explosion and less than the third characteristic time point of the bubble pressure corresponding to any perforating bullet explosion, then the bubble pulsation pressure generated by any perforating bullet explosion at the target position is equal to the bubble pulsation peak pressure generated by any perforating bullet explosion at the target position multiplied by e -80(t-T) By judging the size of the preset sampling moment, the corresponding formula can be used to accurately calculate the size of the bubble pulsation pressure generated by any perforating bullet explosion at the target position.

[0046] In an optional embodiment, the determining of the bubble pulsation peak pressure and the bubble pulsation minimum pressure generated by the explosion of any one of the perforating bullets at the target position based on the amount of ammunition corresponding to any one of the perforating bullets and the water depth of the explosion point corresponding to any one of the perforating bullets comprises: determining the bubble pulsation peak pressure and the bubble pulsation minimum pressure generated by the explosion of any one of the perforating bullets at the target position based on the amount of ammunition corresponding to any one of the perforating bullets and the water depth of the explosion point corresponding to any one of the perforating bullets in the following manner:

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

[0048]

[0049] Among them, P min is the minimum pressure of bubble pulsation generated by any of the above perforating bullets at the above target position, P max is the bubble pulsation peak pressure generated by the explosion of any of the above perforating bullets at the above target position, W is the amount of explosives corresponding to any of the above perforating bullets, and H is the water depth of the explosion point corresponding to any of the above perforating bullets.

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

[0051] In an optional embodiment, the step of obtaining the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosions of multiple perforating charges at the target position on the perforating gun at the preset sampling time includes: determining the explosion reflection pressure generated by any one of the multiple perforating charge explosions at the target position at the preset sampling time by:

[0052] P r =αP0

[0053] Among them, P r is the explosion reflection pressure generated by any perforating bullet explosion on the above target position, P0 is the pressure in still water, and α (α∝[2,3]) is a predetermined multiple.

[0054] Alternatively, since in a liquid, when the shock wave encounters a rigid surface, it will be reflected from the surface, e.g. Figure 4 As shown, Figure 4 Schematic diagram of an optional shock wave reflected on the surface of a steel body according to an embodiment of the present invention. According to the mass conservation equation and momentum conservation equation, it can be obtained that:

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

[0056]

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

[0058]

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

[0060]

[0061] The simultaneous equations show 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 speed, is the angle, ρ is the density. Subscript i represents the node of the pipe string, subscript r represents the reflected wave, subscript L represents the incident wave, and subscripts a and b represent two different moments, a and b, respectively. L,b is the integrated incident wave velocity of the column at time b, u i,b is the incident wave velocity at node i of the pipe string at time b, is the incident wave angle at node i of the pipe string, ρ i,b is the incident wave density at node i of the pipe string at time b, u i,a is the incident wave velocity at node i of the string at time a, is the comprehensive incident wave angle of the column at time a, ρ i,a is the incident wave density of node i at time a, P i,a is the incident wave pressure at node i of the pipe string at time a, P i,b is the incident wave pressure at node i of the pipe string at time b, u r is the reflected wave velocity, is the reflected wave angle, ρ r is the reflected wave density, P i,Ω represents the average incident wave pressure; B is a preset first parameter, which can be obtained through experimental measurement or set to an empirical value, for example, 307.7 MPa; n is a preset second parameter, which can be obtained through experimental measurement or set to an empirical value, for example, 7.15.

[0064] Step S104, determining the comprehensive perforating explosion loads generated by the multiple perforating charges at the target position at the preset sampling time based on the perforating bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the multiple perforating charges at the target position.

[0065] Optionally, the comprehensive perforation explosion load generated by any perforator at the target position in the multiple perforator explosions at the preset sampling time is obtained by the following method: the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by any perforator explosion at the target position are summed to obtain the comprehensive perforation explosion load generated by any perforator at the target position at the preset sampling time. That is, the sum of the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure is used as the comprehensive perforation explosion load. This method makes the calculation of the perforation explosion load more comprehensive and improves the accuracy of the calculation.

[0066] Step S106, determining a target perforation explosion load received by the target position on the perforating gun at the preset sampling time according to the comprehensive perforation explosion loads respectively generated by the multiple perforating charges on the target position at the preset sampling time.

[0067] Optionally, based on the comprehensive perforating explosion loads generated by multiple perforating bullets on the target position at the preset sampling moment, an equivalent perforating explosion load received by the target position on the perforating gun at the preset sampling moment is obtained, and the target perforating explosion load can be accurately and comprehensively obtained by multiplying the equivalent perforating explosion load by a predetermined correction coefficient.

[0068] In an optional embodiment, determining the target perforation explosion load received by the target position on the perforating gun at the preset sampling moment according to the comprehensive perforation explosion loads respectively generated by the multiple perforating charges at the preset sampling moment includes: determining the equivalent perforation explosion load received by the target position on the perforating gun at the preset sampling moment according to the comprehensive perforation explosion loads respectively generated by the multiple perforating charges at the preset sampling moment; determining a predetermined correction coefficient; and obtaining the target perforation explosion load based on the equivalent perforation explosion load and the predetermined correction coefficient.

[0069] Alternatively, the shock waves generated by the simultaneous detonation of two spherical charges of the same equivalent in a liquid intersect in a normal direction, which is equivalent to the case where a shock wave is reflected back by a rigid surface symmetrical to it, such as Figure 6 As shown, Figure 6 is a schematic diagram of an optional explosion load superposition according to an embodiment of the present invention. Therefore, according to the reflection principle of shock waves on rigid surfaces and the field distribution of explosion pressure in liquids, the above-mentioned target perforation explosion load can be obtained in the following manner:

[0070]

[0071] Among them, β is the correction coefficient, P j (j=1, 2, ..., 6) is the equivalent perforating explosion load generated by the j-th perforating hole in the multiple perforating bullets on the above target position. The equivalent perforating explosion loads corresponding to the multiple perforating bullets are summed and multiplied by a correction coefficient to obtain the final target perforating explosion load.

[0072] In an optional embodiment, determining the equivalent perforating explosion load received by the target position on the perforating gun at the preset sampling time according to the comprehensive perforating explosion loads respectively generated by the multiple perforating bullets at the target position at the preset sampling time includes: determining the phase angles respectively corresponding to the explosions of the multiple perforating bullets; decomposing the comprehensive perforating explosion loads respectively generated by the multiple perforating bullets at the target position based on the phase angles respectively corresponding to the explosions of the multiple perforating bullets, the predetermined first coordinate direction, and the predetermined second coordinate direction, to obtain the first equivalent loads respectively generated by the multiple perforating bullets at the target position in the predetermined first coordinate direction, and the phase angles respectively corresponding to the explosions of the multiple perforating bullets. a second equivalent load generated on the target position in the above-mentioned predetermined second coordinate direction; the first equivalent loads generated on the above-mentioned multiple perforating bullets in the above-mentioned predetermined first coordinate direction are summed up to obtain the first perforating explosion load on the above-mentioned target position in the above-mentioned predetermined first coordinate direction at the above-mentioned preset sampling time; the second equivalent loads generated on the above-mentioned multiple perforating bullets in the above-mentioned predetermined second coordinate direction are summed up to obtain the second perforating explosion load on the above-mentioned target position in the above-mentioned predetermined second coordinate direction at the above-mentioned preset sampling time; the equivalent perforating explosion load is determined based on the above-mentioned first perforating explosion load and the above-mentioned second perforating explosion load.

[0073] Optionally, different phase angles of the perforating guns may have different lateral effects on the pipe string, e.g. Figure 7 As shown, Figure 7 FIG. 1 is a schematic diagram of an optional perforating detonation load application according to an embodiment of the present invention. In order to facilitate the study of shock wave reflection and superposition, the perforating bomb explosion load is equivalent to the y-axis and z-axis directions. Taking a 60° phase angle as an example, Figure 5 As shown, Figure 5 60° phase angle distribution of a perforating charge according to an embodiment of the present invention. The perforations corresponding to the perforating charges in the figure differ by 60°. The equivalent perforating explosion load is obtained by the following method:

[0074]

[0075]

[0076]

[0077] The comprehensive perforating explosion loads corresponding to multiple perforating bullets are decomposed according to the y-axis and z-axis directions based on the phase angle to obtain the equivalent loads generated by the multiple perforating bullets 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 comprehensive perforating explosion loads corresponding to the multiple perforating bullets are decomposed based on the phase angle according to the predetermined first coordinate direction and the predetermined second coordinate direction to obtain the first equivalent loads generated by the multiple perforating bullets on the target position in the predetermined first coordinate direction, and the second equivalent loads generated by the multiple perforating bullets on the target position in the predetermined second coordinate direction. Then, they are superimposed according to the predetermined first coordinate direction and the predetermined second coordinate direction to obtain the first perforating explosion load received by the target position in the predetermined first coordinate direction at the preset sampling moment and the second perforating explosion load received by the target position in the predetermined second coordinate direction at the preset sampling moment. The first perforating explosion load and the second perforating explosion load are added to obtain the equivalent perforating explosion load. The purpose is to eliminate the interference of directional factors on the calculation of the equivalent perforating explosion load and improve the calculation accuracy.

[0079] Through the above steps S102 to S106, the purpose of accurately determining the comprehensive explosion load at a specific position on the perforating gun can be achieved, thereby achieving the technical effect of improving the accuracy and applicability of perforating explosion load prediction, and further solving the technical problems of low accuracy and poor universality of the perforating explosion load determination method in the related art.

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

[0081] Step S1, establish a distribution model of the load over time after any perforating bullet explodes:

[0082]

[0083] Wherein, t is the preset sampling time, R is the distance between the target position and any one of the perforating bullets, P(R,t) is the perforating bombardment pressure generated by the explosion of any one of the perforating bullets on the target position, P0 is the pressure in still water, is the peak pressure of the shock wave front after any of the above perforating bullets explode, where W is the amount of explosives corresponding to any of the above perforating bullets, is the time decay exponent, is the time it takes for the detonation wave generated by any of the above perforating bullets to reach the above target position, D i is twice the distance from the target position to any of the above perforating bullets, D o is the diameter of the perforator rack corresponding to any of the above perforating charges, and C0 is the speed of sound in still water.

[0084] Step S2, determining the distance between the target position and any perforating bullet, and the amount of explosives corresponding to any perforating bullet, and obtaining the perforating bombardment pressure generated by any perforating bullet explosion on the target position at a preset sampling time through a load distribution model after any perforating bullet explosion over time.

[0085] Step S3, based on the amount of ammunition corresponding to any perforating bullet and the water depth of the explosion point corresponding to any perforating bullet, obtain the bubble pulsation peak pressure and the bubble pulsation minimum pressure generated by the explosion of any perforating bullet at the target position 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 is the minimum pressure of bubble pulsation generated by any of the above perforating bullets at the above target position, P max is the bubble pulsation peak pressure generated by the explosion of any of the above perforating bullets at the above target position, W is the amount of explosives corresponding to any of the above perforating bullets, and H is the water depth of the explosion point corresponding to any of the above perforating bullets.

[0089] Step S4, determining the distance between the bubble generated by the explosion of any perforating charge and the target position.

[0090] Step S5, establishing a bubble pulsation pressure model:

[0091]

[0092] Wherein, t is the preset sampling time, x is the distance between the bubble generated by the explosion of any of the perforating bullets and the target position, P2 is the bubble pulsation pressure generated by the explosion of any of the perforating bullets on the target position, and P min is the minimum pressure of bubble pulsation generated by any of the above perforating bullets at the above target position, P max is the peak pressure of bubble pulsation caused by any of the above perforating charges at the above target position, t p is the first characteristic time point of the bubble pressure corresponding to any of the above perforating charges explosion, t2 = 2.38 × W 0.273 (H+10) -0.86is the second characteristic time point of the bubble pressure corresponding to the explosion of any of the above perforating bullets, W is the amount of explosives corresponding to any of the above perforating bullets, H is the water depth of the explosion point corresponding to any of the above perforating bullets, t3=2T-t2 is the third characteristic time point of the bubble pressure corresponding to the explosion of any of the above perforating bullets, T=2.11×W 1 / 3 (H+10.3) -5 / 6 is the bubble period corresponding to any of the above perforating bullet explosions.

[0093] Step S6, based on the bubble pulsation peak pressure and the bubble pulsation minimum pressure generated by any perforating charge explosion at the target position, and the distance between the bubble generated by any perforating charge explosion and the target position, the bubble pulsation pressure generated by any perforating charge explosion at the target position at a preset sampling time is determined through a bubble pulsation pressure model.

[0094] Step S7, establishing an explosion reflection model according to the mass conservation equation and the momentum conservation equation:

[0095] P r =αP0,α∝[2,3]

[0096] Among them, P r is the explosion reflection pressure generated by any perforating bullet explosion on the above target position, P0 is the pressure in still water, and α (α∝[2,3]) is a predetermined multiple.

[0097] Step S8, determining the explosion reflection pressure on the target position caused by any one of the multiple perforating charge explosions at a preset sampling time according to the explosion reflection model.

[0098] Step S9, summing up the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by any perforating charge explosion on the target position, to obtain a comprehensive perforation explosion load generated by any perforating charge on the target position at a preset sampling time.

[0099] Step S10, decomposing the comprehensive perforating explosion loads corresponding to the multiple perforating bullets respectively according to the phase angle, along 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 perforating bullets on the target position in the predetermined first coordinate direction and the predetermined second coordinate direction respectively.

[0100] Step S11, summing up the first equivalent loads generated by multiple perforating bullets on the target position in a predetermined first coordinate direction to obtain a first perforating explosion load; summing up the second equivalent loads generated by multiple perforating bullets on the target position in a predetermined second coordinate direction to obtain a second perforating explosion load.

[0101] Step S12, adding the first perforating explosion load and the second perforating explosion load to obtain an equivalent perforating explosion load.

[0102] Step S13, establishing an explosion load superposition model:

[0103]

[0104] Among them, β is the correction coefficient, P j (j=1, 2, ..., 6) is the equivalent perforating explosion load generated by the j-th perforating hole in the multiple perforating bullets on the above target position. The equivalent perforating explosion loads corresponding to the multiple perforating bullets are summed and multiplied by a correction coefficient to obtain the final target perforating explosion load.

[0105] The embodiments of the present invention can at least achieve the following technical effects: 1. Based on the charge amount and type of a single perforating bullet, a prediction model for the change of the explosion load of any perforating bullet over time and the distance from the explosion center is established; the mathematical model for predicting the explosion load of the perforating bullet is obtained by combining the pulsating pressure of the bubbles generated by the explosion, the pulsating period, and the reflection and superposition of the explosion shock wave in the annulus; considering the length of the perforating gun, the phase angle of the perforating bullet, and the hole density of the perforating bullet, a mathematical model for the distribution of the perforating bullet is established, and the explosion load of the perforating bullet is applied to the perforating gun to obtain a prediction model for the explosion load of the perforating gun, which can accurately predict the distribution of the explosion load of the entire perforating gun over time. 2. During the perforating operation, according to the data such as the amount of explosives, the type of explosives, the distance from the explosion center, the length of the perforating gun, the phase angle, the hole density, etc., the direction and size of the explosion 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 the design of appropriate perforating parameters.

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

[0107] This embodiment is based on the data of a well on site (referred to as Well A1). The wellbore structure of the well is as follows: Figure 8 As shown, Figure 8 This is a schematic diagram of an optional wellbore structure of the A1 well according to an embodiment of the present invention. A1 well perforates 6 layers in total, each layer has a perforation depth of 11m, and its related perforation parameters are as follows:

[0108]

[0109] The perforating explosion load prediction model is used to predict the load change over time after a single perforating bullet explodes, such as Fig. 9 As shown, Fig. 9This is a schematic diagram of the load variation over time after the explosion of a single perforating charge according to an optional embodiment of the present invention. It can be seen that the perforating charge reaches a positive pressure peak within a few milliseconds after the explosion, and then gradually decreases to a negative pressure peak as time goes by, and then the load gradually increases again, and finally decreases to 0. This is because the bubbles generated by the explosion expand and contract in the annulus, causing the pressure in the pipe to increase and decrease, resulting in the pressure change trend in the figure.

[0110] Considering the distribution of perforating bullets, the explosion load is decomposed to obtain the lateral load on the perforating gun in the Cartesian coordinate system as follows: Fig.10 and Fig.11 , Fig.10 is a schematic diagram of an optional y-direction explosion load cloud diagram according to an embodiment of the present invention, Fig.11 It is a schematic diagram of an optional z-direction explosion load cloud diagram according to an embodiment of the present invention. It can be seen that the explosion load is sinusoidally distributed in the y direction of the perforating gun, and is cosine distributed in the z direction. In other words, after the perforating bullet explodes, the perforating gun will be subjected to periodic external forces in the y and z directions. Under the action of external forces, the perforating gun will vibrate violently, thereby causing vibration of the entire string. According to the established perforating explosion load prediction model, the present invention can accurately obtain the distribution of the explosion load on the perforating gun, provide a theoretical basis for the perforating parameter design, and maximize the safety of the perforating string.

[0111] In this embodiment, a perforation explosion load determination device is also provided, which is used to implement the above-mentioned embodiments and preferred implementation modes, and the descriptions that have been made will not be repeated. As used below, the terms "module" and "device" can be a combination of software and / or hardware that implements a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0112] According to an embodiment of the present invention, there is also provided an embodiment of a device for implementing the above-mentioned method for determining the perforating explosion load. Fig.12 is a schematic diagram of a structure of a perforation explosion load determination device according to an embodiment of the present invention. Fig.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 is used to acquire the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosion of multiple perforating charges at the target position on the perforating gun at a preset sampling time;

[0114] The first determination module 124 is connected to the first acquisition module 122, and is used to determine the comprehensive perforation explosion loads generated by the multiple perforating charges at 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 perforating charges at the target position.

[0115] The second determination module 126 is connected to the first determination module 124, and is used to determine the target perforation explosion load applied to the target position on the perforating gun at the preset sampling time according to the comprehensive perforation explosion loads generated by the multiple perforating bullets 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 correspond to steps S102 to S106 in the embodiment, and the examples and application scenarios implemented by the modules and the corresponding steps are the same, but are not limited to the contents disclosed in the above embodiments. It should be noted that the modules as part of the device can be run in a computer terminal.

[0118] It should be noted that the optional or preferred implementation of this embodiment can refer to the relevant description in the embodiment, which will not be repeated here.

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

[0120] The processor includes a kernel, which retrieves the corresponding program module from the memory. The kernel may be one or more. The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. The memory includes at least one memory chip.

[0121] According to an embodiment of the present 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 executed, the device where the non-volatile storage medium is located is controlled to execute any of the above-mentioned perforation explosion load determination methods.

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

[0123] Optionally, when the program is running, the device where the non-volatile storage medium is located is controlled to perform the following functions: obtaining the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosions of multiple perforating bullets on the target position at a preset sampling moment; determining the comprehensive perforation explosion load generated by the multiple perforating bullets on the target position at the preset sampling moment based on the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosions of the multiple perforating bullets on the target position; determining the target perforation explosion load received by the target position on the perforating gun at the preset sampling moment based on the comprehensive perforation explosion load generated by the multiple perforating bullets on the target position at the preset sampling moment.

[0124] According to an embodiment of the present application, an embodiment of a processor is also provided. Optionally, in this embodiment, the processor is used to run a program, wherein when the program is run, any of the above-mentioned methods for determining the perforating explosion load is executed.

[0125] According to an embodiment of the present application, an embodiment of a computer program product is also provided. When executed on a data processing device, the computer program product is suitable for executing a program that initializes any of the above-mentioned steps of the method for determining the perforating explosion load.

[0126] Optionally, the computer program product, when executed on a data processing device, is suitable for executing a program that is initialized with the following method steps: obtaining the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosions of multiple perforating charges at a preset sampling moment on a target position on a perforating gun; determining the comprehensive perforation explosion load generated by the multiple perforating charges at the target position at the preset sampling moment based on the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosions of the multiple perforating charges at the target position; determining the target perforation explosion load received by the target position on the perforating gun at the preset sampling moment based on the comprehensive perforation explosion load generated by the multiple perforating charges at the target position at the preset sampling moment.

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

[0128] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made 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. Among them, the device embodiments described above are only schematic. For example, the division of the above modules can be a logical function division. There may be other division methods in actual implementation, such as multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, modules or indirect coupling or communication connection of modules, which can be electrical or other forms.

[0130] The modules described above as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed on multiple modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment.

[0131] In addition, each functional module in each embodiment of the present invention may be integrated into one processing module, or each module may exist physically separately, or two or more modules may be integrated into one module. The above integrated modules may be implemented in the form of hardware or in the form of software functional modules.

[0132] If the above-mentioned integrated module is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer-readable non-volatile storage medium. Based on this understanding, the technical solution of the present invention is essentially 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. The computer software product is stored in a non-volatile storage medium, including a number of instructions to enable a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the various embodiments of the present invention. The aforementioned non-volatile storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0133] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for determining perforation explosion load, characterized in that: include: Obtain the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosion of multiple perforating bullets at the target position on the perforating gun at the preset sampling time; Determine the comprehensive perforation explosion loads generated by the multiple perforating charges at 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 perforating charges at the target position; The target perforation explosion load received by the target position on the perforating gun at the preset sampling moment is determined according to the comprehensive perforation explosion loads respectively generated by the multiple perforating bullets on the target position at the preset sampling moment.

2. The method according to claim 1, characterized in that Determining the target perforation explosion load received by the target position on the perforating gun at the preset sampling time according to the comprehensive perforation explosion loads respectively generated by the multiple perforating bullets at the preset sampling time, comprises: Determine an equivalent perforation explosion load received by the target position on the perforating gun at the preset sampling time according to the comprehensive perforation explosion loads respectively generated by the multiple perforating bullets at the target position at the preset sampling time; determining a predetermined correction factor; The target perforation explosion load is obtained based on the equivalent perforation explosion load and the predetermined correction coefficient.

3. The method according to claim 2, characterized in that The step of determining the equivalent perforating explosion load received by the target position on the perforating gun at the preset sampling time according to the comprehensive perforating explosion loads respectively generated by the multiple perforating bullets at the preset sampling time on the target position comprises: Determine the phase angles corresponding to the explosions of the plurality of perforating charges respectively; Based on the phase angles, the predetermined first coordinate direction, and the predetermined second coordinate direction respectively corresponding to the explosions of the multiple perforating charges, the comprehensive perforating explosion loads respectively generated by the multiple perforating charges on the target position are decomposed to obtain the first equivalent loads respectively generated by the multiple perforating charges on the target position in the predetermined first coordinate direction, and the second equivalent loads respectively generated by the multiple perforating charges on the target position in the predetermined second coordinate direction; Summing the first equivalent loads generated by the multiple perforating bullets on the target position in the predetermined first coordinate direction, respectively, to obtain a first perforating explosion load received by the target position in the predetermined first coordinate direction at the preset sampling time; Summing the second equivalent loads generated by the multiple perforating bullets on the target position in the predetermined second coordinate direction, respectively, to obtain a second perforating explosion load received by the target position in the predetermined second coordinate direction at the preset sampling time; The equivalent perforating explosion load is determined based on the first perforating explosion load and the second perforating explosion load.

4. The method according to any one of claims 1 to 3, characterized in that The method of obtaining the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosion of multiple perforating bullets at the target position on the perforating gun at the preset sampling time includes: The perforating bombardment pressure generated by any one of the multiple perforating charge explosions at the target position at the preset sampling time is determined in the following manner: Determine the distance between the target position and any one of the perforating charges, and the amount of explosives corresponding to any one of the perforating charges; Based on the distance between the target position and any one of the perforating charges and the amount of explosives corresponding to the any one of the perforating charges, the perforating bombardment pressure on the target position caused by the explosion of the any one of the perforating charges at the preset sampling moment is obtained.

5. The method according to claim 4, characterized in that Before obtaining the perforating bombardment pressure generated by the explosion of any perforating bullet on the target position at the preset sampling time based on the distance between the target position and any perforating bullet and the amount of explosives corresponding to any perforating bullet, the method further includes: Based on the distance between the target position and any one of the perforating bullets, and the amount of explosives corresponding to any one of the perforating bullets, the perforating bombardment pressure generated by the explosion of any one of the perforating bullets on the target position at the preset sampling time is obtained in the following manner: Wherein, t is the preset sampling time, R is the distance between the target position and any one of the perforating charges, P(R, t) is the perforating bombardment pressure generated by the explosion of any one of the perforating charges on the target position, P0 is the pressure in still water, is the peak pressure of the shock wave front after the explosion of any one of the perforating bullets, wherein W is the amount of explosives corresponding to any one of the perforating bullets, is the time decay exponent, is the time it takes for the detonation wave generated by any perforating bullet to be transmitted to the target position, D i is twice the distance from the target position to any perforating bullet, D o is the diameter of the perforator bullet holder corresponding to any one of the perforating bullets, and C0 is the speed of sound in still water.

6. The method according to any one of claims 1 to 3, characterized in that: The method of obtaining the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosion of multiple perforating bullets at the target position on the perforating gun at the preset sampling time includes: The bubble pulsation pressure generated by any one of the multiple perforating charge explosions at the target position at the preset sampling time is determined by: Determine the amount of ammunition corresponding to any one of the perforating bullets and the water depth of the explosion point corresponding to any one of the perforating bullets; Based on the amount of ammunition corresponding to any one of the perforating bullets and the water depth of the explosion point corresponding to any one of the perforating bullets, determine the bubble pulsation peak pressure and the bubble pulsation minimum pressure generated by the explosion of any one of the perforating bullets at the target position; Determine the distance between the bubble generated by the explosion of any one of the perforating charges and the target position; Based on the bubble pulsation peak pressure and the bubble pulsation minimum pressure generated by the explosion of any one of the perforating charges on the target position, and the distance between the bubble generated by the explosion of any one of the perforating charges and the target position, the bubble pulsation pressure generated by the explosion of any one of the perforating charges on the target position at the preset sampling moment is determined.

7. The method according to claim 6, characterized in that The step of determining the bubble pulsation pressure generated by any one of the perforating charges at the target position at the preset sampling time based on the bubble pulsation peak pressure and the bubble pulsation minimum pressure generated by any one of the perforating charges at the target position, and the distance between the bubble generated by any one of the perforating charges and the target position, comprises: Based on the bubble pulsation peak pressure and the bubble pulsation minimum pressure generated by the explosion of any one of the perforating charges at the target position, and the distance between the bubble generated by the explosion of any one of the perforating charges and the target position, the bubble pulsation pressure generated by the explosion of any one of the perforating charges at the target position at the preset sampling time is determined in the following manner: Wherein, t is the preset sampling time, x is the distance between the bubble generated by the explosion of any perforating bullet and the target position, P2 is the bubble pulsation pressure generated by the explosion of any perforating bullet on the target position, and P min is the minimum pressure of bubble pulsation generated by any perforating charge explosion at the target location, P max is the peak pressure of bubble pulsation generated by the explosion of any perforating charge at the target position, t p is the first characteristic time point of the bubble pressure corresponding to the explosion of any perforating charge, t2 = 2.38 × W 0.273 (H+10) -0.86 is the second characteristic time point of the bubble pressure corresponding to the explosion of any perforating bullet, W is the amount of explosives corresponding to any perforating bullet, H is the water depth of the explosion point corresponding to any perforating bullet, t3=2T-t2 is the third characteristic time point of the bubble pressure corresponding to the explosion of any perforating bullet, T=2.11×W 1 / 3 (H+10.3) -5 / 6 is the bubble period corresponding to the explosion of any one of the perforating charges.

8. The method according to claim 6, characterized in that The step of determining the bubble pulsation peak pressure and the bubble pulsation minimum pressure generated by the explosion of any perforating bullet at the target position based on the ammunition amount corresponding to any perforating bullet and the water depth of the explosion point corresponding to any perforating bullet comprises: Based on the amount of ammunition corresponding to any one of the perforating bullets and the water depth of the explosion point corresponding to any one of the perforating bullets, the bubble pulsation peak pressure and the bubble pulsation minimum pressure generated by the explosion of any one of the perforating bullets at the target position are determined in the following manner: Q max =5.09×10 6 ×W 0.27 [ln(H+10)-2.3] Among them, P min is the minimum pressure of bubble pulsation generated by any perforating charge explosion at the target location, P max is the bubble pulsation peak pressure generated by the explosion of any perforating bullet at the target position, W is the amount of explosives corresponding to any perforating bullet, and H is the water depth of the explosion point corresponding to any perforating bullet.

9. The method according to any one of claims 1 to 3, characterized in that: The method of obtaining the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosion of multiple perforating bullets at the target position on the perforating gun at the preset sampling time includes: The explosion reflection pressure on the target position caused by any one of the multiple perforating charge explosions at the preset sampling time is determined in the following manner: P r =αP0 Among them, P r is the explosion reflection pressure generated by any perforating charge explosion on the target position, P0 is the pressure in still water, α is a predetermined multiple, α∝[2,3].

10. A device for determining perforating explosion load, characterized in that: include: The first acquisition module is used to obtain the perforation bombardment pressure, bubble pulsation pressure, and explosion reflection pressure generated by the explosion of multiple perforating bullets at the target position on the perforating gun at a preset sampling time; A first determination module is used to determine the comprehensive perforation explosion loads generated by the multiple perforating charges at 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 perforating charges at the target position; The second determination module is used to determine the target perforation explosion load applied to the target position on the perforating gun at the preset sampling moment according to the comprehensive perforation explosion loads respectively generated by the multiple perforating bullets on the target position at the preset sampling moment.

11. An electronic device, characterized in that: It comprises 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 implement the perforation explosion load determination method as described in any one of claims 1 to 9.

Images