CN114837656A - Preparation method of density controllable isotope carrier - Google Patents
Preparation method of density controllable isotope carrier Download PDFInfo
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- CN114837656A CN114837656A CN202210565022.7A CN202210565022A CN114837656A CN 114837656 A CN114837656 A CN 114837656A CN 202210565022 A CN202210565022 A CN 202210565022A CN 114837656 A CN114837656 A CN 114837656A
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- density
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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
- E21B47/00—Survey of boreholes or wells
- E21B47/10—Locating fluid leaks, intrusions or movements
- E21B47/11—Locating fluid leaks, intrusions or movements using tracers; using radioactivity
- E21B47/111—Locating fluid leaks, intrusions or movements using tracers; using radioactivity using radioactivity
-
- 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
- E21B43/20—Displacing by water
Abstract
The invention provides a preparation method of a density controllable isotope carrier, which comprises the following steps: s1, fully mixing the activated carbon powder, the resin powder, the hollow glass beads and the pigment in a V-shaped mixer according to a certain proportion; s2, fully mixing the adhesive and the obtained mixture in a certain proportion in a high-speed mixer; s3, transferring to a swing granulator for granulation; s4, rounding the product in a rounding machine for a period of time and then drying; s5 and then sieving through different particle size ranges as required. The invention has the following beneficial effects: wide density regulating range, high heat resistance, high strength, high isotope adsorption, easy material obtaining and simple process.
Description
Technical Field
The invention belongs to the technical field of oil field monitoring, and particularly relates to a preparation method of a density-controllable isotope carrier.
Background
The oil field is developed for a long time to cause the continuous decline of stratum energy (pressure), the exploitation difficulty is more and more big, and oil displacement technologies such as water injection, gas injection, steam injection, polymer injection and the like are adopted to improve the recovery ratio and the recovery efficiency of residual oil, wherein the water injection and the oil displacement account for a larger proportion. The injected water flows through the stratum to bring the crude oil in the stratum to the oil production well and then is produced by the oil production machine, the produced mixture is separated, the crude oil in the mixture is sent to the oil refinery, the injected water is reused to be injected into the ground, and more oil is produced in a circulating way.
The establishment of the injection and production scheme is the key of residual oil exploitation, and the dynamic injection monitoring provides decision basis for analyzing the relation between injection and oil production and the establishment of the injection and production scheme, and is leading work. The existing injection monitoring technology comprises a noise instrument, a heat flow instrument, pulse neutron oxygen activation, a turbine flowmeter, an isotope tracing method and the like, wherein the isotope tracing method has the advantages of obvious layering, no influence of a pipe column, simple and effective method, low cost and the like and is widely adopted by oil fields. Isotopic tracing methods are mainly of two types: correlated flow logs and injection profile logs. The isotope tracer used for the related flow logging is liquid, and the principle is that the isotope tracer is released above the water absorption layer of the water injection well, the tracer flows along with water, a detection instrument tracks ray signals to obtain the flow velocity information of injected water, when the tracer passes through the water absorption layer, a part of the tracer enters the stratum along with the water, the flow velocity of the injected water is reduced, and the detection instrument records the change, so that the injection dynamics of each water absorption layer can be obtained. The injection profile well logging, also called three-parameter or five-parameter well logging, etc. adopts the principle that the adopted radioactive isotope tracer is solid particles, and is released above the water-absorbing layer of the water injection well, the tracer can be flowed with injected water, and after the tracer is reached to the water-absorbing layer, the water can be fed into stratum, the tracer can be filtered and deposited on the surface of the water-absorbing layer, the gamma ray emitted by radioactive isotope can be detected by detection instrument so as to obtain stratum position, at the same time the ray strength can be correspondent to the water injection quantity of said position, so that the injection condition of every water-absorbing layer can be obtained.
In the oil field radioactive isotope tracing well logging, the injection profile well logging accounts for about 70%, the used radioactive isotope tracer is spherical solid particles, the method of patent CN201110057628.1 is usually adopted for preparation, and the carrier for loading isotope is usually silica gel or active carbon. With the improvement of the technical level and the refinement degree of the oil field logging, the density of the solid tracer is not required to be uniform any more, and the density of the tracer is required to be determined according to factors such as a logging process, the formation condition of the oil field, the mineralization degree of injected water and the like. The density of the existing isotope carrier is fixed, and the tracer density is finely adjusted by simply utilizing a surface treatment method, so that the oil field logging requirement cannot be met. Therefore, a new carrier preparation method is invented to meet the preparation requirement of the solid tracer.
Disclosure of Invention
In order to solve the above problems, the present invention provides a method for preparing a density-controllable isotope carrier.
The invention relates to a preparation method of a density controllable isotope carrier, which comprises the following steps:
s1, fully mixing the activated carbon powder, the resin powder, the hollow glass beads and the pigment in a V-shaped mixer according to a certain proportion;
s2, fully mixing the adhesive and the obtained mixture in a certain proportion in a high-speed mixer;
s3, transferring to a swing granulator for granulation;
s4, rounding the product in a rounding machine for a period of time and then drying;
s5 and then sieving through different particle size ranges as required.
Preferably, the activated carbon powder, the resin powder and the pigment are powdery, and the fineness of the activated carbon powder, the resin powder and the pigment is 20-600 meshes.
Preferably, the resin powder is poly 4-methyl-1-pentene or polypropylene; the pigment is inorganic or organic pigment such as carbon black.
Preferably, the mass ratio of the activated carbon powder, the resin powder, the hollow glass beads and the pigment is 0-70: 0-90: 0-90: 0-50.
Preferably, the mixing is carried out in the V-shaped mixer for 10 to 30 minutes.
Preferably, the mixture is fully mixed in the high-speed mixer, the shearing rotating speed is 0-500 r/min, the mixing rotating speed is 0-200 r/min, and the mixing time is 10-30 min.
Preferably, the adhesive is (1) a cyclohexane solution of poly 4-methyl-1-pentene or polypropylene; (2) ethyl cellulose, methyl cellulose, polyacrylic resin or polyvinyl butyral ethanol solution; (3) an aqueous solution of polyvinyl alcohol; (4) ethyl acetate solution of polyvinyl butyral, ethyl acetate solution of epoxy resin and curing agent, or ethyl acetate solution of polyurethane prepolymer and polyol, or a mixture of two binders of (1), (2) and (4).
Preferably, the screen used in the swing granulator is 5 to 80 mesh.
Preferably, the rounding machine is used for rounding, the rounding rotating speed is 0-300 r/min, the air flow speed is 0-100m3/h, the time is controlled to be 1-20 min, and the adhesive or the solvent of the adhesive is added in the rounding process, and the adding amount is 0-20% of the total material amount.
Preferably, the drying process can adopt a fluidized drying machine, the drying temperature is 30-90 ℃, and the air flow speed is 0-1500m3/h, and the drying time is 0.1-3 hours.
The preparation method of the density controllable isotope carrier has the following beneficial effects: wide density regulating range, high heat resistance, high strength, high isotope adsorption, easy material obtaining and simple process.
Detailed Description
In order that the invention may be better understood, the following further description is provided, taken in conjunction with the accompanying examples, so that the advantages and features of the invention will be more readily understood by those skilled in the art. It should be noted that the following description is only a preferred embodiment of the present invention, but the present invention is not limited to the following embodiment. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope or spirit of the invention. For instance, features illustrated or described as part of one embodiment, can be used with another embodiment to yield a still further embodiment. Therefore, it is intended that the present invention encompass such modifications and variations within the scope of the appended claims and their equivalents.
The invention provides a preparation method of a density controllable isotope carrier, which comprises the following steps:
s1, fully mixing the activated carbon powder, the resin powder, the hollow glass beads and the pigment in a V-shaped mixer according to a certain proportion;
s2, fully mixing the adhesive and the obtained mixture in a certain proportion in a high-speed mixer;
s3, transferring to a swing granulator for granulation;
s4, rounding the product in a rounding machine for a period of time and then drying;
s5 and then sieving through different particle size ranges as required.
The method can obtain particles with the density of 0.2-1.5g/ml and the diameter of 100-10000 microns, and is suitable for oil field isotope tracing well logging.
Preferably, the activated carbon powder, the resin powder and the pigment are powdery, the fineness is 20-600 meshes, and the fineness is preferably 80-120 meshes from the aspect of dust control.
Preferably, the resin powder is poly-4-methyl-1-pentene or polypropylene; the pigment is inorganic or organic pigment such as carbon black.
Preferably, the mass ratio of the activated carbon powder, the resin powder, the hollow glass beads and the pigment is 0-70: 0-90: 0-90: 0-50.
Preferably, the mixture is fully mixed in the V-shaped mixer, and the preferable time is 10 to 30 minutes;
preferably, the materials are fully mixed in the high-speed mixer, and the preferred shearing rotating speed is 0-500 r/min, the mixing rotating speed is 0-200 r/min, and the mixing time is 10-30 min;
preferably, the adhesive is (1) a cyclohexane solution of poly 4-methyl-1-pentene or polypropylene; (2) ethyl cellulose, methyl cellulose, polyacrylic resin or polyvinyl butyral ethanol solution; (3) an aqueous solution of polyvinyl alcohol; (4) ethyl acetate solution of polyvinyl butyral, ethyl acetate solution of epoxy resin and curing agent, or ethyl acetate solution of polyurethane prepolymer and polyol, or a mixture of two binders of (1), (2) and (4). The solid content of the adhesive is 1-20%, and the addition amount of the adhesive is 10-50% of the total material amount.
Preferably, the screens used in the swing granulator are of 5 to 80 mesh, preferably 16 mesh, 20 mesh and 28 mesh.
Preferably, the rounding machine is used for rounding, the rounding rotating speed is 0-300 r/min, the air flow speed is 0-100m3/h, the time is controlled to be 1-20 min, and the adhesive or the solvent of the adhesive in 7 is added in the rounding process, and the adding amount is 0-20% of the total material amount.
Preferably, the drying process can adopt a fluidized drying machine, the drying temperature is 30-90 ℃, and the air flow speed is 0-1500m3/h, and the drying time is 0.1-3 hours.
Preferably, the sieving particle size range is usually 0-100 μm, 100-450 μm, 450-750 μm, 750-1000 μm, 1000-1500 μm, 1500-2000 μm, 2000-5000 μm, 5000-10000 μm, etc.
Example 1
0.1Kg of 150 mesh activated carbon powder, 0.8Kg of 80 mesh polypropylene powder, and 0.1Kg of 600 mesh carbon black were mixed in a V-type mixer for 25 minutes. The mixture is transferred to a high-speed mixer, 900ml of a 10% strength ethyl acetate solution of polyvinyl butyral are added at a mixing speed of 30 rpm and a shear speed of 60 rpm, and after the addition, the mixture is mixed for 30 minutes at a mixing speed of 120 rpm and a shear speed of 180 rpm. Putting the product into a swing granulator, using a sieve with 24 meshes, putting the sieved product into a spheronizer to be spheronized, wherein the rotating speed is 60 revolutions per minute, the air flow speed is 0-20m3/h, simultaneously adding 500ml of ethanol uniformly within 10 minutes, spheronizing for 10 minutes, and discharging. The obtained product was dried in a fluidized drier at an air flow rate of 800m for 2 hours 3 H, the drying temperature is 65 ℃. Separating the dried product by using a rotary vibration sieve according to the particle size ranges of 0-100 μm, 100-450 μm, 450-750 μm, 750-1000 μm, 1000-1500 μm and 1500-2000 μm to obtain the finished product.
The density of the existing silica gel carrier is mainly between 0.99 and 1.02g/ml, the density of the active carbon carrier is larger and is usually more than 1.2g/ml, and the carrier can be controlled between 0.2 and 1.2g/ml, thereby fully meeting the technical requirements of monitoring water injection, gas (steam) injection and polymer injection in oil fields. The resin powder and the hollow glass beads can reduce the density of the carrier, if only the activated carbon powder is added, the resin powder or the hollow glass beads are not added, the density of the obtained carrier is about 1.5g/ml, if 50% of the resin powder is added, the density of the obtained carrier is 1.0-1.15g/ml, and if 20% of the hollow glass beads are added, the density of the obtained carrier is 1.05-1.2 g/ml. Pigments can perform two functions: firstly, adjust carrier density, secondly can use the carrier of different densities of different colour sign, make the user use more convenient.
Logging conditions such as oilfield logging process, injection water pressure, temperature, degree of mineralization and the like are different, and different carrier densities are required, such as logging-on and logging-back, and the density is lower than 1g/ml, for example, 0.98g/ml may be more suitable. If the injected water has a high degree of mineralization and the density of the water is high, such as 1.02g/ml, it is more appropriate to select a carrier having a density of 1.02 g/ml.
The preparation method of the density controllable isotope carrier has the following beneficial effects: wide density regulating range, high heat resistance, high strength, high isotope adsorption, easy material obtaining and simple process.
All equivalent or simple changes of the structure, the characteristics and the principle of the invention which are described in the patent conception of the invention are included in the protection scope of the patent of the invention. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (10)
1. A method for preparing a density-controllable isotope carrier, the method comprising:
s1, fully mixing the activated carbon powder, the resin powder, the hollow glass beads and the pigment in a V-shaped mixer according to a certain proportion;
s2, fully mixing the adhesive and the obtained mixture in a certain proportion in a high-speed mixer;
s3, transferring to a swing granulator for granulation;
s4, rounding the product in a rounding machine for a period of time and then drying;
s5 and then sieving through different particle size ranges as required.
2. The method for preparing a density controllable isotope carrier of claim 1 wherein the activated carbon powder, resin powder, and pigment are in the form of powders with a fineness of 20-600 mesh.
3. The method for preparing a density-controllable isotope carrier according to claim 2, wherein the resin powder is poly-4-methyl-1-pentene or polypropylene; the pigment is inorganic or organic pigment such as carbon black.
4. The method for preparing a density-controllable isotope carrier according to claim 3, wherein the mass ratio of the activated carbon powder, the resin powder, the hollow glass beads and the pigment is 0-70: 0-90: 0-90: 0-50.
5. A method for preparing a density controllable isotopic carrier as claimed in claim 4, wherein mixing is effected in said V-blender for a time period of 10 to 30 minutes.
6. A method for preparing a density controllable isotopic carrier as claimed in claim 1, wherein mixing is effected in said high speed mixer at a shear rate of 0 to 500 rpm for a mixing time of 10 to 30 minutes at a mixing rate of 0 to 200 rpm.
7. The method for preparing a density-controllable isotope carrier according to claim 1, wherein said binder is (1) a cyclohexane solution of poly-4-methyl-1-pentene or polypropylene; (2) ethyl cellulose, methyl cellulose, polyacrylic resin or polyvinyl butyral ethanol solution; (3) an aqueous solution of polyvinyl alcohol; (4) ethyl acetate solution of polyvinyl butyral, ethyl acetate solution of epoxy resin and curing agent, or ethyl acetate solution of polyurethane prepolymer and polyol, or a mixture of two binders of (1), (2) and (4).
8. A method for producing a density-controllable isotope carrier in accordance with claim 1, wherein the screen used in the swing granulator is 5 to 80 mesh.
9. The method for preparing a density-controllable isotope carrier according to claim 1, wherein the spheronization is carried out in a spheronizer at a spheronization rotation speed of 0 to 300 revolutions per minute and an air flow speed of 0 to 100m3 per hour for 1 to 20 minutes, and the binder or the solvent for the binder is added during the spheronization in an amount of 0 to 20% of the total material amount.
10. The method for preparing a density-controllable isotope carrier according to claim 1, wherein the drying process is carried out by using a fluidized drying machine, the drying temperature is 30 to 90 ℃, and the air flow rate is 0 to 1500m3/h for 0.1 to 3 hours.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210565022.7A CN114837656A (en) | 2022-05-23 | 2022-05-23 | Preparation method of density controllable isotope carrier |
| CN202210883288.6A CN114991759B (en) | 2022-05-23 | 2022-07-26 | Density controllable isotope solid tracer carrier for oil field logging and its preparation method |
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| CN202210565022.7A CN114837656A (en) | 2022-05-23 | 2022-05-23 | Preparation method of density controllable isotope carrier |
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| CN202210883288.6A Active CN114991759B (en) | 2022-05-23 | 2022-07-26 | Density controllable isotope solid tracer carrier for oil field logging and its preparation method |
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2022
- 2022-05-23 CN CN202210565022.7A patent/CN114837656A/en not_active Withdrawn
- 2022-07-26 CN CN202210883288.6A patent/CN114991759B/en active Active
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| CN114991759B (en) | 2023-09-08 |
| CN114991759A (en) | 2022-09-02 |
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