CN112324431A - Multi-spectral-band high-resolution intelligent production test method for oil and gas well - Google Patents
Multi-spectral-band high-resolution intelligent production test method for oil and gas well Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 43
- 238000010998 test method Methods 0.000 title claims description 12
- 238000012360 testing method Methods 0.000 claims abstract description 83
- 239000000463 material Substances 0.000 claims abstract description 53
- 238000010521 absorption reaction Methods 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 7
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 20
- 229910001868 water Inorganic materials 0.000 claims description 18
- 229910052747 lanthanoid Inorganic materials 0.000 claims description 16
- 150000002602 lanthanoids Chemical class 0.000 claims description 16
- 238000001035 drying Methods 0.000 claims description 15
- 239000011358 absorbing material Substances 0.000 claims description 14
- 229910000859 α-Fe Inorganic materials 0.000 claims description 14
- 238000010147 laser engraving Methods 0.000 claims description 12
- 235000006408 oxalic acid Nutrition 0.000 claims description 10
- 238000005406 washing Methods 0.000 claims description 10
- 235000011837 pasties Nutrition 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 6
- 230000003595 spectral effect Effects 0.000 claims description 6
- 238000004381 surface treatment Methods 0.000 claims description 6
- 239000002202 Polyethylene glycol Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 239000008367 deionised water Substances 0.000 claims description 5
- 229910021641 deionized water Inorganic materials 0.000 claims description 5
- RKGLUDFWIKNKMX-UHFFFAOYSA-L dilithium;sulfate;hydrate Chemical compound [Li+].[Li+].O.[O-]S([O-])(=O)=O RKGLUDFWIKNKMX-UHFFFAOYSA-L 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- 150000002500 ions Chemical class 0.000 claims description 5
- 229920001223 polyethylene glycol Polymers 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 5
- 229920006395 saturated elastomer Polymers 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 5
- 229910000311 lanthanide oxide Inorganic materials 0.000 claims description 4
- 238000010304 firing Methods 0.000 claims description 3
- 230000001678 irradiating effect Effects 0.000 claims description 3
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims description 2
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 2
- RRIWRJBSCGCBID-UHFFFAOYSA-L nickel sulfate hexahydrate Chemical compound O.O.O.O.O.O.[Ni+2].[O-]S([O-])(=O)=O RRIWRJBSCGCBID-UHFFFAOYSA-L 0.000 claims description 2
- 229940116202 nickel sulfate hexahydrate Drugs 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 230000006378 damage Effects 0.000 abstract description 6
- 238000004458 analytical method Methods 0.000 abstract description 4
- 238000005070 sampling Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 10
- 238000001228 spectrum Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000012544 monitoring process Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 3
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 3
- 239000004570 mortar (masonry) Substances 0.000 description 3
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 description 3
- 229940053662 nickel sulfate Drugs 0.000 description 3
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000011365 complex material Substances 0.000 description 2
- 239000007888 film coating Substances 0.000 description 2
- 238000009501 film coating Methods 0.000 description 2
- CMIHHWBVHJVIGI-UHFFFAOYSA-N gadolinium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[Gd+3].[Gd+3] CMIHHWBVHJVIGI-UHFFFAOYSA-N 0.000 description 2
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 description 2
- 231100000956 nontoxicity Toxicity 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000002679 ablation Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
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- 229910001938 gadolinium oxide Inorganic materials 0.000 description 1
- 229940075613 gadolinium oxide Drugs 0.000 description 1
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- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
-
- 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
- E21B47/00—Survey of boreholes or wells
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; Viscous liquids; Paints; Inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
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Abstract
The invention belongs to the technical field of oil and gas well production testing, and particularly relates to a multi-spectral-band high-resolution intelligent production testing method for an oil and gas well, which solves the problems of complex structure, high cost and potential safety hazard of the oil and gas well production testing method in the prior art. The method comprises the steps of respectively putting test tools inlaid with different high-resolution test materials into different intervals to be monitored, collecting liquid and gas samples on the ground, and detecting the concentrations of the high-resolution test materials with different characteristic absorption bands to obtain the gas production profile data of the produced liquid. The invention can accurately monitor, has high resolution, simple operation and later-period sampling analysis process, no harm to human bodies and environment, eliminates potential safety hazard and is suitable for production test of oil and gas wells.
Description
Technical Field
The invention belongs to the technical field of production testing of oil and gas wells, and particularly relates to a multi-spectral-band high-resolution intelligent production testing method for an oil and gas well.
Background
The production test of the oil and gas well is to test the stratum by a certain technical means, particularly the production condition of each interval during the multi-layer combination, has important significance for knowing the production capacity of the oil and gas reservoir, monitoring the production dynamic state of the oil and gas reservoir, optimizing the well pattern layout and the like, and can provide important basis for the efficient development of the whole oil and gas reservoir.
The prior art is used for the production test method of the oil-gas well and comprises the following steps:
the first method is to measure parameters such as production pressure, fluid temperature, production (oil, gas, water) flow rate, etc. of each horizon during production of oil and gas wells by running special downhole testing tools (such as downhole pressure gauges, flow meters, etc.) in the well. The method needs special underground operation and takes longer time, and because the structure of the underground tool string is complex, certain risk of underground accidents exists.
The other method is to monitor the bottom hole temperature during production by using optical fibers and dynamically monitor the production data of each layer by using different interpretation models aiming at oil, gas and water, and the method can monitor production parameters for a long time but has higher cost; and aiming at the high-pressure gas well, the sealing of the optical fiber passing through the underground packer and the wellhead is difficult to guarantee, and certain hidden danger exists in the aspect of safe production.
Disclosure of Invention
Aiming at the problems of the oil-gas well production test method in the prior art, the invention provides a multi-spectral-band high-resolution intelligent production test method for an oil-gas well, which aims to: the production test operation is more convenient, the measurement is more accurate, the production cost is reduced, and the potential safety hazard is eliminated.
The technical scheme adopted by the invention is as follows:
a multi-spectral-band high-resolution intelligent production test method for oil and gas wells comprises the following steps:
s1: determining construction parameters: determining the number of intervals to be monitored and the type of fluid to be monitored;
s2: selecting a test tool combination according to the construction parameters;
s3: processing the surface of the test tool;
s4: embedding high-resolution test materials on the surface of the processed test tool, wherein the high-resolution test materials embedded on different test tools have different characteristic spectral absorption bands;
s5: respectively putting test tools inlaid with different high-resolution test materials into different intervals to be monitored;
s6: after the production is stable, collecting a liquid-gas sample on the ground, and detecting the concentration of a high-resolution test material with different characteristic absorption bands to obtain the gas production profile data of the produced liquid.
The high-resolution test material has a marked spectral absorption band, can easily and accurately identify the existence and concentration of the material, can form up to 120 test materials with different characteristic spectral absorption bands by adjusting the types and mutual combination of the marking elements in the components of the material, and can intelligently and automatically mark the production dynamics of three-phase fluid of oil, gas and water with 40 layers at one time; the characteristic spectrum absorption bands of different test materials are not mutually interfered, so that the method can accurately detect the characteristic spectrum absorption bands and has extremely high resolution; no toxicity and radioactivity; the particle size of the material is in nanometer level, so that the effect of no tiny reaction can be achieved; the material has high physical and chemical resistance and can exist in the harsh environment with high temperature, high pressure and complex materials at the downhole. The testing tool has small outer diameter and simple structure, can be conveyed to a monitoring position through simple underground operation, can be conveyed to the monitoring position through simple underground operation, can carry a certain amount of testing materials to the ground when oil, gas and water produced in a stratum pass through the testing tool, has the content of each testing material in direct proportion to the yield of the stratum, namely can obtain the oil, gas and water production of the corresponding stratum by obtaining oil, gas and water samples on the ground and detecting the content of each testing material. The invention can accurately monitor, has high resolution, simple operation and later-stage sampling analysis process, has no harm to human bodies and environment, and eliminates potential safety hazards.
Preferably, the method of surface treatment in step S3 is laser engraving, which comprises the steps of:
a1: irradiating a laser beam with high energy density on the surface of the test tool;
a2: adjusting the size of laser beam faculae through lenses with different focal lengths;
a3: the engraving speed, the intensity of the laser beam and the processing time of the laser beam at a specific position on the surface of the test tool are adjusted.
Laser engraving is an advanced object surface treatment method, and the principle of the method is that the surface of an object is subjected to chemical and physical changes to engrave marks through the light energy of a laser beam. The laser engraving film coating technology adopted by the invention is characterized in that a laser beam with high energy density is irradiated on the surface of a test tool, a thermal excitation process is generated in an irradiation area after a substance material on the surface of the test tool absorbs laser energy, so that the temperature of the surface of the tool is rapidly increased, the substance material on the surface of the tool generates phenomena of melting, ablation, evaporation and the like, the size of laser beam spots can be adjusted by utilizing a series of lenses with different focal lengths, and thus, a large number of compact and discontinuous pits with different resolutions are generated on the surface of the tool, the adhesion capability of the high-resolution test material on the surface of the test tool is greatly enhanced, and the effective test time of single well entering operation is prolonged. The engraving depth of the surface of the test tool can be controlled by precisely controlling and adjusting the engraving speed, the intensity of the laser beam or the processing time of the laser beam at a specific position on the surface of the tool by a computer. By utilizing the characteristics, the optimal film coating effect can be achieved on different underground tool materials, the strength of the tool body can not be damaged, and an ideal mark material adhesion effect can be obtained. Compared with the conventional surface coating technology, the laser engraving and film covering technology can increase the effective test time by 2-3 times, and the effective test time of single well entry can reach 3-5 years.
On the other hand, the laser engraving technology adopted in the invention is a non-contact surface treatment technology, so that the stress damage caused by engraving the surface of the underground tool by the engraving tool is completely avoided, the internal stress of the underground tool is in a stable state, and the service life of the underground tool is further prolonged.
Preferably, the high resolution test material in step S4 is a lanthanide doped nano-scale ferrite wave-absorbing material.
Preferably, the preparation method of the lanthanide doped nano-scale ferrite wave-absorbing material comprises the following steps:
b1: weighing the following components in parts by mass: 23-27% of ferric sulfate, 18-22% of nickel sulfate hexahydrate, 8-12% of lithium sulfate monohydrate, 3-5% of lanthanide oxide and 39-41% of oxalic acid;
b2: grinding the above materials for 30min, slowly adding ethanol to obtain paste-like rheologic body;
b3: placing the pasty rheological body in a reaction kettle, reacting for 11-13 h at the constant temperature of 85-95 ℃, then reacting for 11-13 h at the constant temperature of 95-105 ℃, taking out, and naturally cooling to room temperature in a dryer;
b4: the cooled product was washed with deionized water until SO4 -2Completely removing ions, washing with ethanol to remove water and excessive oxalic acid, placing in a drying oven after washing, and drying for 1.5-2.5 h at the constant temperature of 95-105 ℃;
b5: soaking the dried product in a saturated polyethylene glycol solution for 1.5-2.5 h, then drying for 1.5-2.5 h at the constant temperature of 95-105 ℃, and then firing in the air at 800-1000 ℃ for 0.5-1.5 h to obtain the lanthanide doped nano-ferrite wave-absorbing material.
The lanthanide doped nano-ferrite wave-absorbing material can be prepared by adopting the technical scheme, and the marking material with different characteristic spectrum absorption bands can be prepared by changing the type and the addition of the lanthanide.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the high-resolution test material has a marked spectral absorption band, and the existence and the concentration of the material can be easily and accurately identified; the characteristic spectrum absorption bands of different test materials are not mutually interfered, so that the method can accurately detect the characteristic spectrum absorption bands and has extremely high resolution; no toxicity and radioactivity; the particle size of the material is in nanometer level, so that the effect of no tiny reaction can be achieved; the material has high physical and chemical resistance and can exist in the harsh environment with high temperature, high pressure and complex materials at the downhole. The testing tool has small outer diameter and simple structure, can be conveyed to a monitoring position through simple underground operation, can be conveyed to the monitoring position through simple underground operation, can carry a certain amount of testing materials to the ground when oil, gas and water produced in a stratum pass through the testing tool, has the content of each testing material in direct proportion to the yield of the stratum, namely can obtain the oil, gas and water production of the corresponding stratum by obtaining oil, gas and water samples on the ground and detecting the content of each testing material. The invention can accurately monitor, has high resolution, simple operation and later-stage sampling analysis process, has no harm to human bodies and environment, and eliminates potential safety hazards.
2. The invention adopts the laser engraving film covering technology to generate a large number of compact and discontinuous pits with different resolutions on the surface of the tool, thereby greatly enhancing the adhesive capacity of the high-resolution test material on the surface of the test tool and prolonging the effective test time of single well entering operation. The engraving depth of the tool surface can be controlled by precisely controlling and adjusting the engraving speed, the intensity of the laser beam or the processing time of the laser beam at a specific position on the tool surface by a computer. The optimal film covering effect can be achieved for different underground tool materials, the strength of the tool body can not be damaged, and an ideal mark material attaching effect can be obtained. Compared with the conventional surface coating technology, the laser engraving and film covering technology can increase the effective test time by 2-3 times, and the effective test time of single well entry can reach 3-5 years. On the other hand, the laser engraving technology adopted in the invention is a non-contact surface treatment technology, so that the stress damage caused by engraving the surface of the underground tool by the engraving tool is completely avoided, the internal stress of the underground tool is in a stable state, and the service life of the underground tool is further prolonged.
3. By adjusting the type and the adding amount of the lanthanide elements, the marking materials with different characteristic spectrum absorption bands can be prepared, and by combining the marking materials with the different characteristic spectrum absorption bands, up to 120 testing materials with different characteristic spectrum absorption bands can be formed, and the production dynamics of the oil, gas and water three-phase fluid with 40 layers can be intelligently and automatically marked at one time.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the present application will be clearly and completely described below in conjunction with the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. Thus, the detailed description of the embodiments of the present application provided below is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
Example one
A multi-spectral-band high-resolution intelligent production test method for oil and gas wells comprises the following steps:
s1: determining construction parameters: determining the number of intervals to be monitored and the type of fluid to be monitored;
s2: selecting a test tool combination according to the construction parameters;
s3: processing the surface of the test tool;
s4: embedding high-resolution test materials on the surface of the processed test tool, wherein the high-resolution test materials embedded on different test tools have different characteristic spectral absorption bands;
s5: respectively putting test tools inlaid with different high-resolution test materials into different intervals to be monitored;
s6: after the production is stable, collecting a liquid-gas sample on the ground, and detecting the concentration of a high-resolution test material with different characteristic absorption bands to obtain the gas production profile data of the produced liquid.
In this embodiment, the surface treatment method in step S3 is laser engraving, and the laser engraving includes the following steps:
a1: irradiating a laser beam with high energy density on the surface of the test tool;
a2: adjusting the size of laser beam faculae through lenses with different focal lengths;
a3: the engraving speed, the intensity of the laser beam and the processing time of the laser beam at a specific position on the surface of the test tool are adjusted.
In this embodiment, the high resolution test material in step S4 is a lanthanide doped nano-ferrite wave-absorbing material.
The preparation method of the lanthanide doped nano-ferrite wave-absorbing material comprises the following steps:
b1: 21.05g of iron (Fe) sulfate are weighed out2(SO4)316.77g of nickel sulfate N hexahydrateiSO4·6H2O, 8.68g of lithium sulfate monohydrate LiSO4·H2O, 3.50g lanthanum oxide LB2O332.75g of oxalic acid H2C2O4·2H2O；
B2: fully grinding the components in an agate mortar for 30min, and slowly adding ethanol to prepare a pasty rheological body;
b3: placing the pasty rheological body in a reaction kettle, reacting for 12h at the constant temperature of 90 ℃, then reacting for 12h at the constant temperature of 100 ℃, taking out, and naturally cooling to room temperature in a dryer;
b4: the cooled product was washed with deionized water until SO2 -4Completely removing ions, washing with ethanol to remove water and excessive oxalic acid, washing, placing in a drying oven, and drying at 100 deg.C for 2 hr;
b5: and soaking the dried product in a saturated polyethylene glycol solution for 2h, then drying for 2h at the constant temperature of 100 ℃, and then firing for 1h in air at the temperature of 900 ℃ to obtain the lanthanide doped nano-ferrite wave-absorbing material.
Example two
The technical solution of this embodiment is basically the same as that of the first embodiment, and the difference is that:
in this embodiment, the preparation method of the lanthanide doped nano-ferrite wave-absorbing material includes the following steps:
b1: 22.86g of iron (Fe) sulfate are weighed out2(SO4)319.54g of nickel sulfate N hexahydrateiSO4·6H2O, 9.71g lithium sulfate monohydrate LiSO4·H2O, 3.870g cerium oxide CeO234.69g of oxalic acid H2C2O4·2H2O；
B2: fully grinding the components in an agate mortar for 30min, and slowly adding ethanol to prepare a pasty rheological body;
b3: placing the pasty rheological body in a reaction kettle, reacting for 11h at the constant temperature of 85 ℃, then reacting for 11h at the constant temperature of 95 ℃, taking out, and naturally cooling to room temperature in a dryer;
b4: the cooled product was washed with deionized water until SO2 -4Completely removing ions, washing with ethanol to remove water and excessive oxalic acid, washing, drying in a drying oven at constant temperature of 95 deg.C for 1.5 hr;
b5: and soaking the dried product in a saturated polyethylene glycol solution for 1.5h, then drying for 1.5h at the constant temperature of 95 ℃, and then burning in air at the temperature of 800 ℃ for 0.51h to obtain the lanthanide doped nano-ferrite wave-absorbing material.
EXAMPLE III
The technical solution of this embodiment is basically the same as that of the first embodiment, and the difference is that:
in this embodiment, the preparation method of the lanthanide doped nano-ferrite wave-absorbing material includes the following steps:
b1: 20.31g of iron (Fe) sulfate are weighed out2(SO4)315.98g of nickel sulfate N hexahydrateiSO4·6H2O, 8.12g of lithium sulfate monohydrate LiSO4·H2O, 2.95g gadolinium oxide Gd2O330.43g of oxalic acid H2C2O4·2H2O；
B2: fully grinding the components in an agate mortar for 30min, and slowly adding ethanol to prepare a pasty rheological body;
b3: placing the pasty rheological body in a reaction kettle, reacting for 13h at the constant temperature of 95 ℃, then reacting for 13h at the constant temperature of 105 ℃, taking out, and naturally cooling to room temperature in a dryer;
b4: the cooled product was washed with deionized water until SO2 -4Completely removing ions, washing with ethanol to remove water and excessive oxalic acid, washing, drying in a drying oven at 105 deg.C for 2.5 hr;
b5: and soaking the dried product in a saturated polyethylene glycol solution for 2.5h, then drying for 2.5h at the constant temperature of 105 ℃, and then burning for 1.5h in air at the temperature of 1000 ℃ to obtain the lanthanide doped nano-ferrite wave-absorbing material.
The high resolution test materials prepared from different lanthanide oxides in the above examples have different characteristic absorption bands, and the high resolution test materials prepared from the same lanthanide oxide but varying the amount used also have different characteristic absorption bands. The method comprises the steps of respectively putting test tools inlaid with different high-resolution test materials into different intervals to be monitored, collecting liquid and gas samples on the ground, and detecting the concentrations of the high-resolution test materials with different characteristic absorption bands to obtain the gas production profile data of the produced liquid. The invention can accurately monitor, has high resolution, simple operation and later-stage sampling analysis process, has no harm to human bodies and environment, and eliminates potential safety hazards.
The above-mentioned embodiments only express the specific embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, without departing from the technical idea of the present application, several changes and modifications can be made, which are all within the protection scope of the present application.
Claims (5)
1. A multi-spectral-band high-resolution intelligent production test method for oil and gas wells is characterized by comprising the following steps: the method comprises the following steps:
s1: determining construction parameters: determining the number of intervals to be monitored and the type of fluid to be monitored;
s2: selecting a test tool combination according to the construction parameters;
s3: processing the surface of the test tool;
s4: embedding high-resolution test materials on the surface of the processed test tool, wherein the high-resolution test materials embedded on different test tools have different characteristic spectral absorption bands;
s5: respectively putting test tools inlaid with different high-resolution test materials into different intervals to be monitored;
s6: after the production is stable, collecting a liquid-gas sample on the ground, and detecting the concentration of a high-resolution test material with different characteristic absorption bands to obtain the gas production profile data of the produced liquid.
2. The multi-band high resolution intelligent production test method for oil and gas wells of claim 1, wherein: the method of surface treatment described in step S3 is laser engraving.
3. The multi-band high resolution intelligent production test method for oil and gas wells of claim 2, wherein: the laser engraving comprises the following steps:
a1: irradiating a laser beam with high energy density on the surface of the test tool;
a2: adjusting the size of laser beam faculae through lenses with different focal lengths;
a3: the engraving speed, the intensity of the laser beam and the processing time of the laser beam at a specific position on the surface of the test tool are adjusted.
4. The multi-band high resolution intelligent production test method for oil and gas wells of claim 1, wherein: the high-resolution test material in the step S4 is a lanthanide doped nano-scale ferrite wave-absorbing material.
5. The multi-band high resolution intelligent production test method for oil and gas wells of claim 3, wherein: the preparation method of the lanthanide doped nano-ferrite wave-absorbing material comprises the following steps:
b1: weighing the following components in parts by mass: 23-27% of ferric sulfate, 18-22% of nickel sulfate hexahydrate, 8-12% of lithium sulfate monohydrate, 3-5% of lanthanide oxide and 39-41% of oxalic acid;
b2: grinding the above materials for 30min, slowly adding ethanol to obtain paste-like rheologic body;
b3: placing the pasty rheological body in a reaction kettle, reacting for 11-13 h at the constant temperature of 85-95 ℃, then reacting for 11-13 h at the constant temperature of 95-105 ℃, taking out, and naturally cooling to room temperature in a dryer;
b4: the cooled product was washed with deionized water until SO4 -2Completely removing ions, washing with ethanol to remove water and excessive oxalic acid, placing in a drying oven after washing, and drying for 1.5-2.5 h at the constant temperature of 95-105 ℃;
b5: soaking the dried product in a saturated polyethylene glycol solution for 1.5-2.5 h, then drying for 1.5-2.5 h at the constant temperature of 95-105 ℃, and then firing in the air at 800-1000 ℃ for 0.5-1.5 h to obtain the lanthanide doped nano-ferrite wave-absorbing material.
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