1. A combustion agent is characterized by comprising 10-40% of active metal, 45-75% of metal oxide, 1-10% of combustion rate regulating compound, 1-10% of gas generating compound and the balance of other additives, wherein the percentages are mass percentages;

the active metal is one or more of magnesium powder, zirconium powder, zinc powder, nickel powder, aluminum-magnesium alloy powder and aluminum-zinc alloy powder;

the metal oxide is one or more of ferric oxide, ferroferric oxide, nickel oxide, cuprous oxide and manganese dioxide;

the burning rate regulating compound is one or more of calcium carbonate, cobaltosic oxide and carbon powder;

the gas production compound is one or more of hydroxyl-terminated polybutadiene, polytetrafluoroethylene and fluororubber.

2. A combustion agent according to claim 1, wherein said other additive is a stearate.

3. An ultrahigh-temperature jet flow enhancer for oil stimulation, which adopts the combustion agent of claim 1, and is characterized by comprising a shell (1), a cover body (2) and a combustion agent (3);

the shell (1) is a hollow revolving body integrally, two ends of the shell are opened, and the inner diameter of one end is larger than that of the other end; the outer wall of the shell is in a two-step shape, and a conical surface smooth transition is formed between the small-diameter end and the step;

the cover body (2) is an annular plate, and the position is limited by the step surface of the inner wall of the shell and the inner bulge of the small-diameter end, so that an annular cavity chamber is formed among the cover plate (2), the smooth transition part of the conical surface and the inner part of the small-diameter end and is used for filling a combustion agent (3);

a plurality of exhaust grooves are axially formed in the inner wall of the large-diameter end of the shell (1); when the opening of the perforating charge is arranged on the cover plate (2), a gap is formed between the outer wall of the perforating charge and the exhaust groove and used for exhausting air during working.

4. The ultra-high temperature jet multiplier for oil stimulation according to claim 3, characterized in that the plurality of exhaust grooves are circumferentially and uniformly distributed along the axis of the casing (1).

5. The ultra-high temperature jet flow synergist for oil yield increase of claim 3, wherein the synergist can be matched with perforators of various models from 73mm to 178mm, and meets the use requirements of most high-temperature oil and gas wells and ultra-high temperature oil and gas wells.

6. A method of making an ultra high temperature jet multiplier for oil stimulation according to claim 3, comprising the steps of:

step 1: preparing a shell (1) and a cover body (2), wherein both the shell (1) and the cover body are prepared by adopting aluminum powder, polytetrafluoroethylene and other small amount of inorganic salt, wherein the content of the aluminum powder is 5-30%, the content of the polytetrafluoroethylene is 65-90%, and the content of the inorganic salt is 1-5%, the aluminum powder, the polytetrafluoroethylene and the inorganic salt are mixed by a mechanical ball milling mixing mode, and then the mixture is pressed and sintered to be formed by adopting a mould pressing method;

step 2: the method is characterized in that a burning agent (3) is filled in an annular cavity of a shell (1), a cover body (2) and the burning agent (3) are compacted into the inner cavity of the shell (1) under the pressure of 80 KN-200 KN and the pressure maintaining time of 3 s-5 s, a step is arranged at the bottom of a straight edge inside the shell (1), the cover body (2) is attached to the shell (1) at the position of the step during pressing, and the formed annular cavity is in the charging shape of the burning agent (3).

7. The method for preparing the ultra-high temperature jet flow synergist for petroleum stimulation according to claim 6, wherein the press-loading density of the combustion agent (3) is 2g/cm³～3g/cm³The mass is 10g to 30 g.

8. The method for preparing the ultrahigh-temperature jet flow synergist for oil stimulation according to claim 6, wherein the temperature resistance of the combustion agent (3) is 250 ℃/170 h.

Background

The composite perforation technology of oil-gas well is a common oil-gas production increasing mode in oil field. The main principle is that a high-temperature high-pressure area is formed by explosion of a perforating bullet, gunpowder in a medicine box arranged at an opening part is ignited along with the gunpowder entering a perforating hole, a large amount of high-temperature high-pressure gas is generated, a perforating hole channel is flushed and fractured, the flow conductivity of the perforating hole channel is increased, and a stratum pollution zone is removed. Through one-time well descending, perforation is realized, and pore channel transformation is realized. The construction efficiency is higher, and economic benefits is good. However, the medicaments in the medicine box are solid propellant or gunpowder medicaments such as double-base medicaments, belong to explosives, and need to be produced by a fire explosive dangerous article workshop with high danger level, and the requirements of the country on transportation, storage and use management and control of civil explosives are higher and higher at present, and safety accidents caused by improper use also exist in the use process, so that safety risks exist, and the management cost is very high. The maximum temperature resistance of the conventional gunpowder box for the oil field is 160 ℃/48h, and the conventional gunpowder box can only be used in a normal-temperature well and a high-temperature well generally.

With the development of the technology, patent CN201410755772.6 discloses a posteffecter body particle preparation for oil and gas well perforation and a posteffecter body perforation technology of a preparation method, the technology is that a posteffecter body for shaped perforation is additionally arranged at the front end of a perforating bullet, energetic group particles with different granularities are dragged into a perforation pore canal by virtue of the eddy current field gravitation generated after the perforating bullet explodes, and the energetic group particles with different granularities generate cloud and mist diffusion and cloud and mist detonation to do work on the perforation pore canal. However, this method can only improve the perforation tunnel to a certain extent, and the practical use effect is not widely accepted in the industry. And the highest temperature resistance is 200 ℃/200h, and the use requirements cannot be met in the ultra-high temperature wells of the Xinjiang oil field, the ocean oil field and other parts at present.

Disclosure of Invention

The technical problem solved by the invention is as follows: in order to solve various problems and defects in the prior art, the invention relates to a combustion agent, an ultrahigh-temperature jet flow synergist for increasing the yield of petroleum by adopting the combustion agent and a preparation method thereof, and the ultrahigh-temperature jet flow synergist for increasing the yield of petroleum is a relatively safe and environment-friendly non-initiating explosive device. Simple structure, abundant raw material sources, safe production and manufacturing process and no pollution to the environment. The combustion agent, the shell and the cover body are all energetic materials, and can generate violent chemical reaction with each other under the high-temperature and high-pressure environment formed by the explosion of the perforating charge to form coarse plasma metal fluid which forms continuous fluid with metal jet flow of the perforating charge to generate a pore canal with large pore volume without a pestle body. The invention plays an important role in improving the quality and the efficiency of the oil-gas well and provides a new means for increasing the yield of oil gas.

The technical scheme of the invention is as follows: a combustion agent comprises 10-40% of active metal, 45-75% of metal oxide, 1-10% of combustion rate regulating compound, 1-10% of gas generating compound and the balance of other additives, wherein the percentages are mass percentages;

the active metal is one or more of magnesium powder, zirconium powder, zinc powder, nickel powder, aluminum-magnesium alloy powder and aluminum-zinc alloy powder;

the metal oxide is one or more of ferric oxide, ferroferric oxide, nickel oxide, cuprous oxide and manganese dioxide;

the burning rate regulating compound is one or more of calcium carbonate, cobaltosic oxide and carbon powder;

the gas production compound is one or more of hydroxyl-terminated polybutadiene, polytetrafluoroethylene and fluororubber.

The further technical scheme of the invention is as follows: the other additive is stearate.

The further technical scheme of the invention is as follows: the ultra-high temperature jet flow synergist for increasing the yield of petroleum comprises a shell, a cover body and a combustion agent; the whole shell is a hollow revolving body, two ends of the shell are opened, and the inner diameter of one end of the shell is larger than that of the other end of the shell; the outer wall of the shell is in a two-step shape, and a conical surface smooth transition is formed between the small-diameter end and the step; the cover body is an annular plate, and the position is limited by the step surface of the inner wall of the shell and the inner bulge of the small-diameter end, so that an annular cavity chamber is formed among the cover plate, the smooth transition part of the conical surface and the inner part of the small-diameter end and is used for filling a combustion agent; a plurality of exhaust grooves are axially formed in the inner wall of the large-diameter end of the shell; when the opening of the perforating charge is arranged on the cover plate, a gap is formed between the outer wall of the perforating charge and the exhaust groove and used for exhausting air during working.

The further technical scheme of the invention is as follows: the exhaust grooves are uniformly distributed along the circumferential direction of the axis of the shell.

The further technical scheme of the invention is as follows: the synergist can be matched with perforators of 73-178 mm in various types, and the using requirements of most high-temperature oil and gas wells and ultrahigh-temperature oil and gas wells are met.

The further technical scheme of the invention is as follows: a method of an ultrahigh temperature jet flow multiplier for petroleum stimulation comprises the following steps:

step 1: preparing a shell and a cover body, wherein the shell and the cover body are both prepared by adopting aluminum powder, polytetrafluoroethylene and other small amount of inorganic salt, wherein the content of the aluminum powder is 5-30%, the content of the polytetrafluoroethylene is 65-90%, and the content of the inorganic salt is 1-5%, and the aluminum powder, the polytetrafluoroethylene and the inorganic salt are mixed by a mechanical ball milling mixing mode and then pressed and sintered by a mould pressing method to form;

step 2: the method comprises the steps of filling a combustion agent into an annular cavity of a shell, compacting a cover body and the combustion agent into an inner cavity of the shell under the conditions of 80-200 KN pressure and 3-5 s pressure maintaining time, wherein the bottom of a straight edge in the shell is provided with a step, the cover body is attached to the shell at the position of the step during pressing, and the formed annular cavity is in the shape of the charge of the combustion agent.

The further technical scheme of the invention is as follows: the press-loading density of the combustion agent is 2g/cm³～3g/cm³The mass is 10g to 30 g.

The further technical scheme of the invention is as follows: the temperature resistance of the combustion agent is 250 ℃/170 h.

Effects of the invention

The invention has the technical effects that: compared with the prior art, the invention has the following technical effects:

(1) the invention does not belong to the category of explosives, is safer compared with gunpowder boxes, does not need to use explosive workshops for production, is not controlled by civil explosive vehicle transportation, storage and use management regulations, is beneficial to reducing the construction cost and improving the economic benefit of oil fields.

(2) The invention is not easy to ignite under the normal temperature and pressure and the open fire or the static spark, and the accidental combustion is not worried about, thus the field use is safer.

(3) The invention can generate rapid chemical reaction in the explosive environment of the perforating charge, generate thick high-speed plasma metal fluid to be attached to the rear part of the metal jet of the perforating charge to form continuous jet flow, enter the perforating channel to perform thermal cutting on rocks around the channel after the perforating charge penetrates through a reservoir to form the perforating channel, generate thermal stress by utilizing the high-temperature gradient inside and outside the channel, perform thermal fragmentation, and increase the volume of the channel by more than 30 percent and improve the penetration depth by more than 10 percent through the actual measurement of a ground test. Through thermal cutting and crushing of the perforation duct and under the action of negative pressure, rock debris in the duct and the metal pestle body wrapped by the rock debris are removed, damage to rock strata around the duct caused by perforation can be eliminated, and seepage capability of the perforation duct is recovered.

(4) The invention can resist the temperature of 250 ℃/170h, has no deformation after high temperature test, and has no change in performance index after assembling perforating bullet target shooting test. The invention can match with perforators of various models from 73mm to 178mm, and meets the use requirements of most high-temperature oil and gas wells and ultrahigh-temperature oil and gas wells.

In conclusion, the invention is a novel non-initiating explosive device and ultra-high temperature jet flow synergistic device developed on the basis of analyzing and summarizing short plates of related similar yield increasing technologies at home and abroad. When the device is used, the device is arranged at the opening of the perforating bullet, a high-temperature high-pressure area formed when the perforating bullet explodes provides an optimal environment for generating chemical reaction for the device, energetic material components generate intermolecular reaction to generate coarse high-speed plasma metal fluid which is attached to the rear part of metal jet flow of the perforating bullet to form continuous jet flow, after the perforating bullet penetrates through a reservoir layer to form a perforating duct, the thick high-speed plasma metal fluid enters the perforating duct to perform thermal cutting on rocks around the duct, and the diameter and the depth of the perforating duct are continuously increased. And high temperature gradients are formed on the surface and the inside of the rock of the pore canal to generate thermal stress, the rock around the pore canal is further crushed, the pore canal is expanded, and finally, the generated rock debris and the metal pestle body wrapped by the rock debris are pressed into the well canal from the pore canal by utilizing the negative pressure difference between the well canal and the pore canal to form the clean pore canal.

Drawings

FIG. 1 is a schematic view of a jet booster

FIG. 2 is a schematic view of the assembly of the jet booster and the perforating charge

Description of reference numerals: 1-a shell; 2-a cover body; 3-a combustion agent; 4-perforating charge.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Referring to fig. 1-2, an ultrahigh temperature jet flow synergist for petroleum yield increase comprises a shell, a cover body and a combustion agent. Firstly, a certain mass of combustion agent is filled in an inner cavity of a shell, then a cover body is covered, the shell is filled in a mold, the shell is pressed into the inner cavity of the shell under certain pressure and pressurization time, and the press-loading density of the combustion agent is 2g/cm³～3g/cm³. The diameter D of the jet flow synergistic device is 30-60 mm, the height L of the jet flow synergistic device is 15-30 mm, the mass of the combustion agent filled in the jet flow synergistic device is 10-30 g, and the temperature resistance is 250 ℃/170 h. When in use, the perforating bullet is arranged at the opening part of the perforating bullet and can be matched with perforators of 73 mm-178 mm in various types, so that the use requirements of most high-temperature oil and gas wells and ultrahigh-temperature oil and gas wells are met.

The combustion agent consists of active metal, metal oxide, combustion rate regulating compound, gas producing compound and other additives. Wherein the active metal is mainly one or more of magnesium powder, zirconium powder, zinc powder, nickel powder, aluminum-magnesium alloy powder, aluminum-zinc alloy powder and the like, and the content is 15-50%; the metal oxide mainly comprises one or more of ferric oxide, ferroferric oxide, nickel oxide, cuprous oxide, manganese dioxide and the like, and the content is 35-85%; the burning rate regulating compound mainly comprises one or more of calcium carbonate, cobaltosic oxide, carbon powder and the like, and the content is 1-10%; the gas production compound mainly comprises one or more of hydroxyl-terminated polybutadiene, polytetrafluoroethylene, fluororubber and the like, and the content is 1-10%; the other additives are mainly stearate with the content of 1-5 percent.

The shell and the cover body are made of aluminum powder, polytetrafluoroethylene and other small amount of inorganic salt, wherein the content of the aluminum powder is 5% -30%, the content of the polytetrafluoroethylene is 70% -90%, and the content of the inorganic salt is 1% -5%, and the aluminum powder, the polytetrafluoroethylene and the inorganic salt are mixed by a mechanical ball milling mixing mode and then pressed and sintered by a mould pressing method to form the aluminum-based composite material.

The invention can be matched with various types of perforating bullets with deep penetration, ultra-deep penetration, large aperture, equal aperture, self-cleaning and the like. The outer diameter of the shell is 55mm, the height is 25mm, and the wall thickness is 1.5 mm; the outer diameter of the cover body is 52mm, and the wall thickness is 1 mm. The shell and the cover body are formed by die pressing, sintering and molding 15% of aluminum powder, 80% of polytetrafluoroethylene and 5% of other additives.

The composition of the combustion agent formulation is shown in the table below. The table is only a possible embodiment, but not limited to, and the formula composition and equivalent transformation included in the technical scheme of the invention are all within the protection scope of the invention.

TABLE 1 ultra-high temperature jet booster burner recipe composition table

The preparation process of the combustion agent comprises the following steps: firstly, manually mixing weighed metal powder with polytetrafluoroethylene (formula 1) or fluororubber (formula 2) for 10min, then putting the mixed metal powder mixture and the rest weighed components into a double-action three-dimensional mixer for mixing for 20min to 30min, and finally sieving the mixed materials by using a sieve of 40 meshes to 50 meshes to obtain undersize materials for use.

When pressing, firstly, 15 g-20 g of combustion agent powder is weighed by using a damping platform balance, and then the shell is placedAnd (3) putting the powder into a die sleeve, filling the weighed powder into the die sleeve by using a funnel, putting a cover body, starting a press, enabling a punch to slowly enter the die sleeve, pushing the cover body to compact the powder into the inner cavity of the shell under the pressure of 80-200 KN, and keeping the pressure for 3-5 s. After pressing, the die is removed and the product is taken out, and the press-mounting density is 2g/cm³～3g/cm³。

When the jet flow booster is used on site, the jet flow booster is arranged at the opening part of a perforating bullet and then is placed into a perforating gun bullet frame tube for fixation, and after the assembly is completed, the jet flow booster is placed into a perforating gun and is placed into an oil-gas well for use. The specific assembling method is the same as that of the gun loading of the composite perforator.