CN113338865A - Application method of anti-scaling technology for oil field geothermal well based on catalyst alloy - Google Patents
Application method of anti-scaling technology for oil field geothermal well based on catalyst alloy Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 36
- 239000003054 catalyst Substances 0.000 title claims abstract description 28
- 238000005516 engineering process Methods 0.000 title claims abstract description 14
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 8
- 230000002265 prevention Effects 0.000 claims abstract description 8
- 238000001914 filtration Methods 0.000 claims abstract description 7
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 4
- 239000000843 powder Substances 0.000 claims description 34
- 238000002360 preparation method Methods 0.000 claims description 16
- 239000000243 solution Substances 0.000 claims description 16
- 239000002245 particle Substances 0.000 claims description 11
- 238000000889 atomisation Methods 0.000 claims description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 8
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- 239000000203 mixture Substances 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 6
- 238000010891 electric arc Methods 0.000 claims description 6
- 239000000706 filtrate Substances 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 239000001257 hydrogen Substances 0.000 claims description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims description 6
- 238000005551 mechanical alloying Methods 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 3
- 229910021580 Cobalt(II) chloride Inorganic materials 0.000 claims description 3
- 229910021586 Nickel(II) chloride Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 3
- 230000032683 aging Effects 0.000 claims description 3
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 3
- VBIXEXWLHSRNKB-UHFFFAOYSA-N ammonium oxalate Chemical compound [NH4+].[NH4+].[O-]C(=O)C([O-])=O VBIXEXWLHSRNKB-UHFFFAOYSA-N 0.000 claims description 3
- 238000000498 ball milling Methods 0.000 claims description 3
- 238000009792 diffusion process Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000012065 filter cake Substances 0.000 claims description 3
- 239000011261 inert gas Substances 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000003746 solid phase reaction Methods 0.000 claims description 3
- 238000010671 solid-state reaction Methods 0.000 claims description 3
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- 239000010959 steel Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 239000010937 tungsten Substances 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 230000003197 catalytic effect Effects 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 20
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- 238000005260 corrosion Methods 0.000 description 2
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- 239000007791 liquid phase Substances 0.000 description 2
- 239000002455 scale inhibitor Substances 0.000 description 2
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- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
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- 230000033228 biological regulation Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
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- 230000007774 longterm Effects 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
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- 229910017604 nitric acid Inorganic materials 0.000 description 1
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- 229920006395 saturated elastomer Polymers 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing or limiting, e.g. eliminating, the deposition of paraffins or like substances
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/14—Making metallic powder or suspensions thereof using physical processes using electric discharge
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/043—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by ball milling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
- B22F2009/0824—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid with a specific atomising fluid
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- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Catalysts (AREA)
Abstract
The invention relates to the technical field of oil field geothermal wells, in particular to an application method of an oil field geothermal well anti-scaling technology based on catalyst alloy, which comprises the following steps: s1, preparing a catalyst alloy material; s2, according to the calcium carbonate scaling behavior, wellhead pressure, different temperatures and CO2Scaling trend under partial pressure, and defining scaling positions and other key links of geothermal scale prevention; s3, adding a catalyst alloy material before filtering; according to the invention, through testing, the catalyst alloy material is used for changing the structure of water molecules so as to achieve the purposes of scale prevention and wax control.
Description
Technical Field
The invention relates to the technical field of oil field geothermal wells, in particular to an application method of an oil field geothermal well anti-scaling technology based on catalyst alloy.
Background
The main factors restricting the economic development of the world are the shortage of clean energy and the protection of the environment, on one hand, high-quality economy is developed by consuming energy, and on the other hand, better protection of the living environment is needed. The importance of the world countries on the living environment is also improved to a new height, so that the energy supply structure of each country is adjusted and reformed while the economy is developed; the utilization of clean energy can effectively relieve the current situation of environmental damage while developing economy.
According to investigation, countries in which geothermal power generation accounts for the most primary energy consumption in our country are kenya (51%), iceland (30%), philippines (27%), salvardo (25%), new zealand (14.5%), and nicaragua (9.9%). In the ice island, the geothermal energy can meet more than 90% of heat supply requirements; the main advantage is that it is not affected by weather conditions and has a high capacity factor. The 2010 world geothermal development conference report states that the world geothermal direct utilization scale of the year is 121696GWh, wherein China occupies about 17.2%, and the number is continuously increased along with the development of the geothermal industry. According to the exploration of the national resource department, the exploitation amount of the geothermal water in China is preliminarily estimated to reach 68 hundred million m3, and the geothermal energy can provide abundant geothermal clean energy for China to replace part of industries taking coal as resources. The global geothermal power generation report of 2020 states that the most of the total geothermal installed capacity of 2019 is united states (18.3%), indonesia (15.3%), philippines (13.8%), turkish (10.9%), new zealand (6.9%). China ranks 19 th, and the geothermal installed capacity does not progress greatly.
The key to the worldwide impediment to the use of geothermal resources is: the geothermal water generally has the problem of scaling in the development and utilization processes, and seriously troubles the normal operation of pipelines and equipment. In most geothermal field utilization projects, huge manpower and material resources are consumed each year to descale pipelines and equipment. Eight-well geothermal field of sheep (established in 1977, occupying 40km2) which delivers natural heat on the ground up to 107,000 kcal per second is the largest geothermal steam power plant in china. In the early eight-well geothermal power station, due to serious scaling, the flow passage components of geothermal fluid need to be regularly descaled, and continuous power generation is further influenced. The most serious scaling is the well pipe in the geothermal well, and the well pipe with the diameter of 200mm can be blocked in 3-5 days generally. After the scale is formed, the well pipe of the geothermal well needs to be descaled on line by a hollow hammer method, other flow passage components still need to be cleaned regularly, the effective time of a power station is seriously occupied, and the generated energy is greatly reduced. In addition, oil fields such as Liaohe and Jidong have abundant geothermal resources, and the development of geothermal energy obtains remarkable results; also, in the process of developing and utilizing geothermal heat, corrosion and scaling are always the problems which plague the high-efficiency and long-term development of geothermal heat.
The main reason for scaling geothermal water is that the temperature and pressure of geothermal water change during development from a reservoir, generally, the temperature change is small, the pressure change is large, so that the solubility of calcium and magnesium ions and other dissolved components dissolved in geothermal water is affected, and part of components reach a saturated state in geothermal water and are washed out and deposited on the surfaces of pipelines and equipment in a solid state. In the process of exploiting geothermal water, in order to relieve the phenomenon of water level reduction caused by excessive exploitation of geothermal water, water needs to be injected back into the ground. However, during reinjection, the reinjection water is scaled in the reservoir due to changes of factors such as pressure and temperature, and the reinjection efficiency is affected. Therefore, not only the scaling of geothermal water in pipes, but also the scaling problem of geothermal reinjection water in underground reservoirs has to be studied.
After the geothermal water pipe system is scaled, the scaling is conventionally removed by chemical cleaning or physical cleaning. Physical cleaning generally includes electromagnetic, strong magnetic, membrane technology, ultrasonic, and robot, etc.; however, for geothermal water, the conventional physical cleaning has more limitation on environmental requirements; therefore, the chemical and physical composite cleaning method is usually adopted. However, chemical cleaning easily causes great pollution hidden trouble to the environment; after the scale is chemically washed, the discharged solution mainly contains inorganic strong acid such as hydrofluoric acid, hydrochloric acid, nitric acid and the like, and toxic components or corrosive waste liquid decomposed by corrosion inhibitors and additives, and excessive waste liquid is discharged into the stratum to possibly pollute the underground water and even influence the structure of a thermal reservoir.
At present, aiming at the scaling problem of geothermal water at home and abroad, the development of high-efficiency scale inhibitors and other fluid mechanics engineering methods are mainly focused. As the scale inhibitor, phosphate glass, lime-soda ash, and the like are typical and environmentally friendly. The method is mainly used for evaluating the scaling trend by researching indexes such as Retzno index, Rassen index, driving force index and the like so as to take corresponding measures, and belongs to passive scale prevention. There are few reports about physical scale inhibition techniques, except mechanical cleaning.
Therefore, the development of geothermal resources has urgently required a practical and efficient anti-scaling technique which is not limited by the use environment.
Disclosure of Invention
In view of the above disadvantages of the prior art, a first object of the present invention is to provide a method for applying an oilfield geothermal well antiscaling technology based on a catalyst alloy, which solves the above problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
the application method of the oil field geothermal well anti-scaling technology based on the catalyst alloy comprises the following steps:
s1, preparing a catalyst alloy material;
s2, according to the calcium carbonate scaling behavior, wellhead pressure, different temperatures and CO2Scaling trend under partial pressure, and defining scaling positions and other key links of geothermal scale prevention;
s3, adding catalyst alloy material before filtering.
By adopting the technical scheme: the water molecule structure is changed to achieve the purposes of scale prevention and wax control.
The invention is further configured to: in the step S1, the preparation of the alloy material includes the following steps: hydrogen atomization, rotary electrode atomization, mechanical alloying and special preparation.
By adopting the technical scheme: the catalyst alloy material can be prepared by different preparation methods according to requirements.
The invention is further configured to: the hydrogen atomization method comprises the following steps:
1) the molten steel flows down through the pouring gate and is atomized into powder in high-pressure inert gas flow;
2) the atomizing nozzle is provided with a double nozzle and a conical nozzle, so that gas is dissolved in the molten alloy;
3) and rapidly reducing the pressure to burst gas in the alloy liquid, so as to atomize the alloy liquid and obtain fine powder without air holes.
The invention is further configured to: the rotary electrode method comprises the following steps:
1) the raw material alloy is used as a rotary consumable electrode, and the electrode is continuously melted by an electric arc generated by a fixed tungsten electrode or a plasma electric arc;
2) molten metal drops at the end of the rotating electrode fly out under the action of centrifugal force to form fine alloy spherical particles, the particle size is determined by parameters of electric power, electrode diameter and electrode rotating speed, and the electrode diameter is 50-75 mm.
The invention is further configured to: the mechanical alloying method comprises the following steps:
1) mixing the alloyed element powder, and operating in a high-energy ball mill for a long time;
2) transferring the rotary mechanical energy to metal powder, and generating composition by virtue of plastic deformation of the powder in the ball milling process;
3) diffusion and solid state reaction occur to form an alloy powder.
The invention is further configured to: the special preparation method comprises the following steps:
1) preparing FeC1 with a certain stoichiometric ratio2、NiCl2、CoCl2A solution;
2) mixing at room temperature, adjusting the pH value of the mixed solution to 0.5 by using dilute hydrochloric acid, and adjusting the pH value by using dilute hydrochloric acid and ammonia water;
3) then adding the mixture and an ammonium oxalate solution with the temperature of 60 ℃, and reacting under the stirring condition;
4) controlling the pH value of the solution to be 2.0, aging for 1.0h, filtering and washing for multiple times to ensure that the filtrate is not mixed in a filter cake;
5) and drying the filtrate to obtain powder.
Advantageous effects
Compared with the known public technology, the technical scheme provided by the invention has the following beneficial effects:
the catalyst alloy material is used to change the structure of water molecules so as to achieve the purposes of scale prevention and wax control.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present invention will be further described with reference to the following examples.
Examples
The application method of the oil field geothermal well anti-scaling technology based on the catalyst alloy comprises the following steps:
step one, preparing a catalyst alloy material;
the preparation method of the alloy material comprises the following steps: hydrogen atomization, rotary electrode atomization, mechanical alloying and special preparation methods;
the hydrogen atomization method comprises the following steps:
1) the molten steel flows down through the pouring gate and is atomized into powder in high-pressure inert gas flow;
2) the atomizing nozzle is provided with a double nozzle and a conical nozzle, so that gas is dissolved in the molten alloy;
3) and rapidly reducing the pressure to burst gas in the alloy liquid, so as to atomize the alloy liquid and obtain fine powder without air holes.
The rotary electrode method comprises the following steps:
1) the raw material alloy is used as a rotary consumable electrode, and the electrode is continuously melted by an electric arc generated by a fixed tungsten electrode or a plasma electric arc;
2) molten metal drops at the end of the rotating electrode fly out under the action of centrifugal force to form fine alloy spherical particles, the particle size is determined by parameters of electric power, electrode diameter and electrode rotating speed, and the electrode diameter is 50-75 mm.
The mechanical alloying method comprises the following steps:
1) mixing the alloyed element powder, and operating in a high-energy ball mill for a long time;
2) transferring the rotary mechanical energy to metal powder, and generating composition by virtue of plastic deformation of the powder in the ball milling process;
3) diffusion and solid state reaction occur to form an alloy powder.
The special preparation method comprises the following steps:
1) preparing FeC1 with a certain stoichiometric ratio2、NiCl2、CoCl2A solution;
2) mixing at room temperature, adjusting the pH value of the mixed solution to 0.5 by using dilute hydrochloric acid, and adjusting the pH value by using dilute hydrochloric acid and ammonia water;
3) then adding the mixture and an ammonium oxalate solution with the temperature of 60 ℃, and reacting under the stirring condition;
4) controlling the pH value of the solution to be 2.0, aging for 1.0h, filtering and washing for multiple times to ensure that the filtrate is not mixed in a filter cake;
5) and drying the filtrate to obtain powder.
Step two, according to the scaling behavior of calcium carbonate, wellhead pressure, different temperatures and CO2Scaling trend under partial pressure, and defining scaling positions and other key links of geothermal scale prevention;
and step three, adding a catalyst alloy material before filtering.
In any of the methods for preparing a powder catalyst material, a powder preparation process is required in order to refine the alloy powder to an appropriate size, and the appropriate size includes three meanings: 1. size, Fe33Ni15Co2The alloy is required to be ground to 5-10 mu m, each particle is a single crystal, 2, the size of the powder is required to be uniform, 3, the powder particles are nearly spherical, the surface is smooth, and the defects are few; the shape, chemical composition, internal and external surface area, volume and surface defect of the powder determine the structural morphology of the powder particles, and the precise control of the chemical proportion determinesThe fundamental characteristics of the powder are determined.
In the special preparation process of the powder catalyst material, the chemical proportion, the granularity and the morphology are used as main technical indexes to be controlled, the chemical preparation is quite difficult to achieve the targets, a liquid phase precipitation method is one of the most common wet powder preparation methods, the liquid phase precipitation method is widely applied and developed by the advantages of excellent powder preparation quality, simplicity and convenience, low cost, easiness in expansion and the like, and the precipitation reaction is a key step in the wet powder preparation and has decisive influence on the characteristics of the granularity, the morphology and the like of final powder particles.
The particle morphology includes characteristics of shape, surface defect, roughness and the like, but generally refers to the shape, such as sphere, rod, needle and the like, and in the actual reaction precipitation process, the most convenient method is to select a proper precipitator to obtain particles with certain shapes. Meanwhile, the solution concentration, the type of anions in the reaction system, whether the reaction system is sealed and other factors may affect the morphology of the particles. The shape change of the precipitated particles can be understood and controlled using four approaches: shape control, kinetic control, aggregation control and additive regulation in thermodynamic equilibrium state.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (6)
1. The application method of the oil field geothermal well anti-scaling technology based on the catalyst alloy is characterized by comprising the following steps:
s1, preparing a catalyst alloy material;
s2, according to the calcium carbonate scaling behavior, wellhead pressure, different temperatures and CO2Scaling tendency under partial pressure, definition of scaling position and scaling positionKey links of other geothermal scale prevention;
s3, adding catalyst alloy material before filtering.
2. The catalyst alloy-based method for applying the oilfield geothermal well antiscaling technology in the field according to claim 1, wherein the method comprises the following steps: in the step S1, the preparation of the alloy material includes the following steps: hydrogen atomization, rotary electrode atomization, mechanical alloying and special preparation.
3. The catalyst alloy-based method for applying the oilfield geothermal well antiscaling technology in the field according to claim 2, wherein the catalyst alloy-based method comprises the following steps: the hydrogen atomization method comprises the following steps:
1) the molten steel flows down through the pouring gate and is atomized into powder in high-pressure inert gas flow;
2) the atomizing nozzle is provided with a double nozzle and a conical nozzle, so that gas is dissolved in the molten alloy;
3) and rapidly reducing the pressure to burst gas in the alloy liquid, so as to atomize the alloy liquid and obtain fine powder without air holes.
4. The catalytic alloy-based oilfield geothermal well antiscaling technique according to claim 2. The application method is characterized in that: the rotary electrode method comprises the following steps:
1) the raw material alloy is used as a rotary consumable electrode, and the electrode is continuously melted by an electric arc generated by a fixed tungsten electrode or a plasma electric arc;
2) molten metal drops at the end of the rotating electrode fly out under the action of centrifugal force to form fine alloy spherical particles, the particle size is determined by parameters of electric power, electrode diameter and electrode rotating speed, and the electrode diameter is 50-75 mm.
5. The catalyst alloy-based method for applying the oilfield geothermal well antiscaling technology in the field according to claim 2, wherein the catalyst alloy-based method comprises the following steps: the mechanical alloying method comprises the following steps:
1) mixing the alloyed element powder, and operating in a high-energy ball mill for a long time;
2) transferring the rotary mechanical energy to metal powder, and generating composition by virtue of plastic deformation of the powder in the ball milling process;
3) diffusion and solid state reaction occur to form an alloy powder.
6. The catalyst alloy-based method for applying the oilfield geothermal well antiscaling technology in the field according to claim 2, wherein the catalyst alloy-based method comprises the following steps: the special preparation method comprises the following steps:
1) preparing FeC1 with a certain stoichiometric ratio2、NiCl2、CoCl2A solution;
2) mixing at room temperature, adjusting the pH value of the mixed solution to 0.5 by using dilute hydrochloric acid, and adjusting the pH value by using dilute hydrochloric acid and ammonia water;
3) then adding the mixture and an ammonium oxalate solution with the temperature of 60 ℃, and reacting under the stirring condition;
4) controlling the pH value of the solution to be 2.0, aging for 1.0h, filtering and washing for multiple times to ensure that the filtrate is not mixed in a filter cake;
5) and drying the filtrate to obtain powder.
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