CN116146157A - Oil-gas well blocking-removing foam discharging rod and use method thereof - Google Patents
Oil-gas well blocking-removing foam discharging rod and use method thereof Download PDFInfo
- Publication number
- CN116146157A CN116146157A CN202310033357.9A CN202310033357A CN116146157A CN 116146157 A CN116146157 A CN 116146157A CN 202310033357 A CN202310033357 A CN 202310033357A CN 116146157 A CN116146157 A CN 116146157A
- Authority
- CN
- China
- Prior art keywords
- foam discharging
- discharging rod
- oil
- gas well
- well plugging
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/584—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific surfactants
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/592—Compositions used in combination with generated heat, e.g. by steam injection
Abstract
The invention relates to the technical field of foam discharging rods, in particular to a blockage removing foam discharging rod for an oil gas well. Pressing inorganic salt and surfactant as raw materials to obtain an oil-gas well plugging removal foam discharging rod, wherein the surfactant accounts for 20-40 parts by weight; the inorganic salt accounts for 60-80 parts by weight; and then the plugging removing rod of the oil gas well is put into the oil gas well mouth, the catalyst foam discharging rod is put into the oil gas well after complete dissolution, and the energetic material in the solution is rapidly decomposed to generate a large amount of nitrogen and heat, so that the plugging removing, yield increasing and injection increasing effects are achieved. The invention uses common chemical materials to generate a great amount of gas and heat in the underground reaction to replace the combustion of gunpowder propellant grains in a shaft; the gas produced by the reaction is colorless and odorless nitrogen, but not toxic and harmful gases such as CO, HCl and the like formed by burning the gunpowder propellant, and has higher safety and economy.
Description
Technical Field
The invention relates to the technical field of foam discharging rods, in particular to a blockage removing foam discharging rod for an oil gas well and a use method of the blockage removing foam discharging rod.
Background
In the production process of the gas production well, natural gas is continuously extracted, water continuously flows out in the process of extracting the natural gas, and the accumulated liquid of the gas production well is more and more accumulated to a certain height for a long time, so that the extraction of the natural gas is suppressed. In general, a certain amount of foam discharging rod is put into the liquid to form foam in the liquid. Because the liquid density is small, the pressure of the natural gas generated by the stratum can break through the accumulated liquid and can be continuously extracted, but the accumulated liquid also reaches a certain degree, and the produced gas well cannot recover the productivity by the aid of the bubble discharging rod liquid, so that the dead well is formed. Particularly for a horizontal gas production well, the foam discharging rod cannot reach the horizontal section of the horizontal gas well, and other methods are directly adopted to unblock the horizontal gas well.
Conventional foam bars consist of surfactant (to generate foam), urea (for counter weight) and polyethylene glycol 4000 (to facilitate de-filming). The density is 1.10-1.30 g/cm 3 When the foam discharging rod is used, a certain amount of foam discharging rods are put into the gas production well according to the condition of the effusion of the gas production well, the quality of the effusion and the like, the foam discharging rods fall into the effusion to be rapidly dissolved, a large amount of foam is formed, the density of the upper layer of the effusion is reduced, the expansion force of the well wall is reduced, the produced gas overcomes the resistance to continue to be produced, and the yield of the gas production well is recovered.
At present, the density of the traditional foam discharging rod is smaller (1.10-1.30 g/cm) 3 ) The foam discharging rod cannot fall into the bottom of the accumulated liquid and has no energy, so the effect is limited, and the foam discharging rod has to be intermittently and periodically put into a production site to maintain the continuous production of the gas well.
Disclosure of Invention
Aiming at the problems that a foam discharging rod in the prior art cannot reach the horizontal section of a gas well and cannot achieve the blocking removal effect without energy, the invention provides the blocking removal foam discharging rod for an oil gas well.
In a first aspect, the invention provides an oil gas well plugging removal foam discharging rod, which is prepared by pressing raw materials with inorganic salt and surfactant, wherein the surfactant accounts for 20-40 parts by weight; the inorganic salt accounts for 60-80 parts by weight.
Further, the density of the foam discharging rod is 1.5-1.7 g/cm 3 。
Further, the inorganic salt is selected from two of sodium bicarbonate, ammonium carbonate and ammonium nitrite.
Further, the surfactant is one or more of cocamidopropyl betaine, lauramidopropyl hydroxysulfobetaine or dodecyl dimethyl betaine.
Further, the weight part ratio of the two inorganic salts is 1:1.
In the oil-water well, the oil-water well plug removing foam discharging rod is put into the well mouth, and after the foam discharging rod is completely dissolved in the oil-water well plug removing layer section, the catalyst foam discharging rod is put into the oil-water well plug removing layer section, and energetic materials in the solution are rapidly decomposed to generate a large amount of nitrogen and heat, so that the effects of plug removing, yield increasing and injection increasing are achieved.
Further, the addition amount of the catalyst foam discharging rod is 10% of the mass of the oil-gas well blockage removing foam discharging rod.
Further, the catalyst foam discharging rod is bar stock with the same size as the plugging removing foam discharging rod of the oil-gas well, and is obtained by pressing catalyst powder after adding 10 weight percent of surfactant.
The invention has the beneficial effects that:
1. the invention uses common chemical materials to generate a great amount of gas and heat in the underground reaction to replace the combustion of gunpowder propellant grains in a shaft; the gas produced by the reaction is colorless and odorless nitrogen, but not toxic and harmful gases such as CO, HCl and the like formed by burning the gunpowder propellant, so that the gas is safer and more reliable for site construction personnel; and the materials used are common chemicals, so that the risks in use, storage and transportation are avoided.
2. The raw materials of the invention comprise the surfactant, the surfactant can play a certain role in bonding in the pressing process, and plays a role in underground foaming in the using process.
3. The construction operation of the technology is completed only by putting enough foam discharging rods and catalytic foam discharging rods into the wellhead oil gas pipe during construction, the oil pipe is required to be started for high-energy gas fracturing, then shell-free explosive columns are put into the casing pipe, and after ignition and detonation, the casing pipe is put into the oil pipe to complete the subsequent operation; the reaction time of the technology in the shaft is longer and is more than 1 minute, so that more medicine than the powder column can be used at one time without damaging the sleeve, and more remarkable geological effect is achieved.
4. The technology has wide application range, and is suitable for exploitation of oil and gas injection wells, gas well horizontal wells and shale gas; and is cheaper and lower in cost than high-energy gas fracturing equipment.
Detailed Description
In order to better understand the technical solutions of the present invention, the following description will clearly and completely describe the technical solutions of the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
Example 1
Uniformly mixing 40 parts by weight of cocamidopropyl betaine, 30 parts by weight of sodium bicarbonate and 30 parts by weight of ammonium carbonate, and pressing to obtain a density of 1.52g/cm 3 With citric acid as catalyst, citric acid and cocamidopropyl betaine according to 9: mixing and pressing the mixture into the same size as an oil-gas well plugging removing foam discharging rod according to the mass ratio;
in an oil-water well, a well mouth is put into a pressed oil-gas well blockage removing foam discharging rod, after 5 hours, the foam discharging rod is completely dissolved in a Jie Du layer section of the oil-water well, then a catalyst foam discharging rod with the weight being 10% of the adding amount of the oil-gas well blockage removing foam discharging rod is put into the oil-water well, energetic materials in the solution are rapidly decomposed within 10 minutes, a large amount of nitrogen and heat are generated, and the effect of blockage removing, yield increasing and injection increasing is achieved by acting on the oil-water layer section by virtue of gunpowder combustion gas.
Example 2
30 parts by weight of lauramidopropyl hydroxysulfobetaine, 35 parts by weight of sodium bicarbonate and parts by weight of sodium bicarbonateUniformly mixing 35 ammonium carbonate, pressing to obtain a density of 1.62g/cm 3 The round foam-discharging rod of (2) is prepared by using salicylic acid as a catalyst, and salicylic acid and cocamidopropyl betaine according to the following steps of 9: mixing and pressing the mixture into the same size as an oil-gas well plugging removing foam discharging rod according to the mass ratio;
in a horizontal well of natural gas, a well mouth is put into a pressed oil gas well for blocking removal foam discharging rod, after 4 hours, the foam discharging rod is completely dissolved in a Jie Du layer section of an oil gas well, then a catalyst foam discharging rod with the weight of 10 percent of the adding amount of the oil gas well blocking removal foam discharging rod is put into the horizontal well, and energetic materials in the solution are rapidly decomposed within 10 minutes to generate a large amount of nitrogen and heat which act on the horizontal gas layer section; can remove the accumulated liquid of the horizontal interval, and can ensure that the unblocking channel of the gas layer of the horizontal interval is more smooth, and the production of the horizontal gas well is restored.
Example 3
Uniformly mixing 20 parts by weight of dodecyl dimethyl betaine, 40 parts by weight of sodium bicarbonate and 40 parts by weight of ammonium carbonate, and pressing to obtain a density of 1.68g/cm 3 The round foam-removing bars of (2) are prepared by using tartaric acid as a catalyst and tartaric acid and dodecyl dimethyl betaine according to the following steps of 9: mixing and pressing the mixture into the same size as an oil-gas well plugging removing foam discharging rod according to the mass ratio;
in the oil-water well, the well mouth is put into the pressed oil-water well to remove the blocking foam discharging rod, after 3 hours, the foam discharging rod is completely dissolved in the Jie Du layer section of the oil-water well, then the catalyst foam discharging rod with the weight of 10 percent of the adding amount of the oil-water well to remove the blocking foam discharging rod is put into the oil-water well, the energetic material in the solution is rapidly decomposed within 10 minutes to generate a large amount of nitrogen and heat, which is equivalent to the action of gunpowder combustion gas on the oil-water layer section, thereby playing the roles of blocking removal, yield increase and injection increase.
Example 4
Uniformly mixing 30 parts by weight of lauramidopropyl hydroxysulfobetaine, 35 parts by weight of sodium bicarbonate and 35 parts by weight of ammonium nitrite, and pressing to obtain a density of 1.69g/cm 3 Is a round, hoarding foam-shaped bar, and salicylic acid is used as a catalyst, and salicylic acid and cocamidopropyl betaine are used as the catalyst according to 9: mixing and pressing the mixture into the same size as an oil-gas well plugging removing foam discharging rod according to the mass ratio;
in a horizontal well of natural gas, a well mouth is put into a pressed oil gas well for blocking removal foam discharging rod, after 4 hours, the foam discharging rod is completely dissolved in a Jie Du layer section of an oil gas well, then a catalyst foam discharging rod with the weight of 10 percent of the adding amount of the oil gas well blocking removal foam discharging rod is put into the horizontal well, and energetic materials in the solution are rapidly decomposed within 10 minutes to generate a large amount of nitrogen and heat which act on the horizontal gas layer section; can remove the accumulated liquid of the horizontal interval, and can ensure that the unblocking channel of the gas layer of the horizontal interval is more smooth, and the production of the horizontal gas well is restored.
Although the present invention has been described in detail by way of preferred embodiments, the present invention is not limited thereto. Various equivalent modifications and substitutions may be made in the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and it is intended that all such modifications and substitutions be within the scope of the present invention/be within the scope of the present invention as defined by the appended claims.
Claims (8)
1. The oil gas well plugging removing foam discharging rod is characterized in that raw materials with components of inorganic salt and surfactant are pressed to obtain the oil gas well plugging removing foam discharging rod, wherein the surfactant accounts for 20-40 parts by weight; the inorganic salt accounts for 60-80 parts by weight.
2. The oil-gas well plugging removing foam discharging rod as set forth in claim 1, wherein the density of the foam discharging rod is 1.5-1.7 g/cm 3 。
3. The oil and gas well plugging removing foam discharging rod according to claim 1, wherein the inorganic salt is selected from two of sodium bicarbonate, ammonium carbonate and ammonium nitrite.
4. The oil and gas well plugging removing foam discharging rod according to claim 1, wherein the surfactant is one or more of cocamidopropyl betaine, lauramidopropyl hydroxysulfobetaine or dodecyl dimethyl betaine.
5. The oil-gas well plugging removing foam discharging rod according to claim 1, wherein the weight part ratio of the two inorganic salts is 1:1.
6. The method for using the oil-gas well plugging removing foam discharging rod is characterized in that the oil-gas well plugging removing foam discharging rod according to claim 1 is put into an oil-gas well mouth, after the foam discharging rod is completely dissolved in an oil-water well plugging removing layer section, a catalyst foam discharging rod is put into the oil-gas well plugging removing layer section, and energetic materials in the solution are rapidly decomposed to generate nitrogen and heat.
7. The method for using the oil gas well plugging removing foam discharging rod as set forth in claim 6, wherein the adding amount of the catalyst foam discharging rod is 10% of the mass of the oil gas well plugging removing foam discharging rod.
8. The method of using a hydrocarbon well plugging removal foam discharging rod as claimed in claim 6, wherein the catalyst foam discharging rod is bar stock with the same size as the hydrocarbon well plugging removal foam discharging rod, and is obtained by pressing catalyst powder after adding 10wt% of surfactant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310033357.9A CN116146157A (en) | 2023-01-10 | 2023-01-10 | Oil-gas well blocking-removing foam discharging rod and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310033357.9A CN116146157A (en) | 2023-01-10 | 2023-01-10 | Oil-gas well blocking-removing foam discharging rod and use method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116146157A true CN116146157A (en) | 2023-05-23 |
Family
ID=86361388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310033357.9A Pending CN116146157A (en) | 2023-01-10 | 2023-01-10 | Oil-gas well blocking-removing foam discharging rod and use method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116146157A (en) |
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2023
- 2023-01-10 CN CN202310033357.9A patent/CN116146157A/en active Pending
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