CN111269703B - Intelligent steering agent for coal bed gas exploitation and preparation method thereof - Google Patents
Intelligent steering agent for coal bed gas exploitation and preparation method thereof Download PDFInfo
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- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 73
- 239000003245 coal Substances 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- -1 N, N-methylene Chemical group 0.000 claims abstract description 12
- CBOJBBMQJBVCMW-BTVCFUMJSA-N (2r,3r,4s,5r)-2-amino-3,4,5,6-tetrahydroxyhexanal;hydrochloride Chemical compound Cl.O=C[C@H](N)[C@@H](O)[C@H](O)[C@H](O)CO CBOJBBMQJBVCMW-BTVCFUMJSA-N 0.000 claims abstract description 10
- FJUVSGNCSKHNRA-NKJCVJTJSA-N (3R,4R,5S,6R)-6-(hydroxymethyl)-3-(methylamino)oxane-2,4,5-triol hydrochloride Chemical compound Cl.CN[C@H]1C(O)O[C@H](CO)[C@@H](O)[C@@H]1O FJUVSGNCSKHNRA-NKJCVJTJSA-N 0.000 claims abstract description 10
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- 229960001911 glucosamine hydrochloride Drugs 0.000 claims abstract description 10
- 239000002904 solvent Substances 0.000 claims abstract description 8
- 239000004094 surface-active agent Substances 0.000 claims abstract description 8
- 239000012752 auxiliary agent Substances 0.000 claims description 17
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 12
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 claims description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 6
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 6
- 239000004310 lactic acid Substances 0.000 claims description 6
- 235000014655 lactic acid Nutrition 0.000 claims description 6
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 claims description 6
- 239000011734 sodium Substances 0.000 claims description 6
- 229910052708 sodium Inorganic materials 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 4
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 claims description 4
- LYRFLYHAGKPMFH-UHFFFAOYSA-N octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(N)=O LYRFLYHAGKPMFH-UHFFFAOYSA-N 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- KJPRLNWUNMBNBZ-QPJJXVBHSA-N (E)-cinnamaldehyde Chemical compound O=C\C=C\C1=CC=CC=C1 KJPRLNWUNMBNBZ-QPJJXVBHSA-N 0.000 claims description 2
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 claims description 2
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 claims description 2
- XRHGYUZYPHTUJZ-UHFFFAOYSA-N 4-chlorobenzoic acid Chemical compound OC(=O)C1=CC=C(Cl)C=C1 XRHGYUZYPHTUJZ-UHFFFAOYSA-N 0.000 claims description 2
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 2
- 239000011837 N,N-methylenebisacrylamide Substances 0.000 claims description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 2
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 claims description 2
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 2
- MNOILHPDHOHILI-UHFFFAOYSA-N Tetramethylthiourea Chemical compound CN(C)C(=S)N(C)C MNOILHPDHOHILI-UHFFFAOYSA-N 0.000 claims description 2
- 235000011054 acetic acid Nutrition 0.000 claims description 2
- BJEPYKJPYRNKOW-UHFFFAOYSA-N alpha-hydroxysuccinic acid Natural products OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 claims description 2
- 229940117916 cinnamic aldehyde Drugs 0.000 claims description 2
- KJPRLNWUNMBNBZ-UHFFFAOYSA-N cinnamic aldehyde Natural products O=CC=CC1=CC=CC=C1 KJPRLNWUNMBNBZ-UHFFFAOYSA-N 0.000 claims description 2
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 2
- 239000001530 fumaric acid Substances 0.000 claims description 2
- 235000011087 fumaric acid Nutrition 0.000 claims description 2
- 125000006038 hexenyl group Chemical group 0.000 claims description 2
- 239000001630 malic acid Substances 0.000 claims description 2
- 235000011090 malic acid Nutrition 0.000 claims description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 2
- 229940037312 stearamide Drugs 0.000 claims description 2
- 239000011975 tartaric acid Substances 0.000 claims description 2
- 235000002906 tartaric acid Nutrition 0.000 claims description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims description 2
- MWOOGOJBHIARFG-UHFFFAOYSA-N vanillin Chemical compound COC1=CC(C=O)=CC=C1O MWOOGOJBHIARFG-UHFFFAOYSA-N 0.000 claims description 2
- FGQOOHJZONJGDT-UHFFFAOYSA-N vanillin Natural products COC1=CC(O)=CC(C=O)=C1 FGQOOHJZONJGDT-UHFFFAOYSA-N 0.000 claims description 2
- 235000012141 vanillin Nutrition 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract description 20
- 239000007787 solid Substances 0.000 abstract description 9
- 230000008859 change Effects 0.000 abstract description 7
- 239000007790 solid phase Substances 0.000 abstract description 7
- 239000012071 phase Substances 0.000 abstract description 5
- 230000000638 stimulation Effects 0.000 abstract description 3
- 239000002253 acid Substances 0.000 abstract description 2
- 150000001412 amines Chemical class 0.000 abstract description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 14
- 238000002156 mixing Methods 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 238000007711 solidification Methods 0.000 description 8
- 230000008023 solidification Effects 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 239000007789 gas Substances 0.000 description 7
- 238000001179 sorption measurement Methods 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 5
- 238000003795 desorption Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000007791 liquid phase Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000002791 soaking Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000033772 system development Effects 0.000 description 1
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- 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
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
-
- 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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention discloses an intelligent steering agent for coal bed gas exploitation and a preparation method thereof, wherein the intelligent steering agent comprises the following components in percentage by weight: 5 to 15 percent of glucosamine hydrochloride, 10 to 20 percent of N-methyl-D-glucosamine hydrochloride, 1 to 20 percent of water-soluble regulator, 0.2 to 0.5 percent of surfactant, 0.1 to 0.2 percent of dispersing mutual solvent, 5 to 20 percent of acrylamide, 1 to 10 percent of N, N-methylene bisacrylic acid amine, 5 to 10 percent of accelerator and 50 to 60 percent of water. The intelligent steering agent is in a liquid state under the ground condition, has low viscosity and good injectability; after the intelligent steering agent is injected into a coal bed, the intelligent steering agent can be subjected to temperature stimulation to change from a liquid state to a solid state under the low-temperature condition of a coal reservoir, the phase change time can be adjusted by adjusting the temperature, other temporary plugging agents are not needed to be added, and the formed solid phase temporary plugging is a non-porous longitudinal plane plugging and a transverse volume plugging, so that the plugging strength is high and no gap exists.
Description
Technical Field
The invention relates to a preparation method of an intelligent steering agent applied to temporary blocking steering of coal bed methane, and belongs to the technical field of coal bed methane exploitation.
Technical Field
At present, the general progress of the domestic coalbed methane industry is slow, the technical bottlenecks of high-efficiency development of low-rank coal bed methane, yield increase and efficiency improvement of a developed area, comprehensive development of deep coalbed methane and coal-series gas and the like are not broken through, the general low yield and instability of a ground coalbed methane well are still unresolved, and the problem that the prior art is difficult to support the rapid development of the industry is still to be solved.
The existing temporary plugging agent applied to temporary plugging and turning of coal bed gas is few, mainly is a temporary plugging agent which is solid-phase particles or fiber under the ground condition, and has the following problems: the uniform carrying of the carrying liquid is difficult to realize; the formed particle shielding temporary blocking has the defects that particles are blocked, the defects exist between the particles, and the blocking is incomplete or can not be stopped; and is easy to damage the reservoir. Therefore, by combining the general characteristics of soft coal reservoirs, large surface area, strong adsorptivity, low pressure, natural crack system development and the like, the intelligent steering agent for coal bed gas exploitation is developed, is in a liquid state under the ground condition, is subjected to temperature stimulation and changes from the liquid state to a solid state after being injected into a coal bed, forms non-porous longitudinal plane blockage and transverse volume blockage on the coal bed, can completely change from the solid state to the liquid state under certain temperature and time conditions, can smoothly flow back, and is convenient to construct and high in blocking strength.
Disclosure of Invention
The invention aims to provide an intelligent steering agent for coal bed gas exploitation, which is liquid under ground conditions, changes phase from liquid to solid in a coal bed, has controllable phase change time, high strength, strong bearing capacity and good steering effect, and has a good application prospect.
The invention further aims to provide a preparation method of the intelligent steering agent, which is simple in preparation process, high in controllability and suitable for mass production.
The invention solves the technical problems by adopting the following technical scheme:
the invention provides an intelligent steering agent, which comprises the following components in percentage by weight: 5 to 15 percent of glucosamine hydrochloride, 10 to 20 percent of N-methyl-D-glucosamine hydrochloride, 1 to 20 percent of water-soluble regulator, 0.2 to 0.5 percent of surfactant, 0.1 to 0.2 percent of dispersing mutual solvent, 5 to 20 percent of acrylamide, 1 to 10 percent of N, N-methylene bisacrylic acid amine, 5 to 10 percent of accelerator and 50 to 60 percent of water,
the water-soluble regulator is lactic acid, acetic acid, tartaric acid, malic acid, fumaric acid, etc.;
the surfactant is polyoxyethylene alkylphenol ether, sodium alkylaryl sulfonate and sodium dodecyl benzene sulfonate;
the dispersing mutual solvent is isopropanol, ethylene glycol monobutyl ether, sodium oleate and hexenyl bis stearamide;
the promoter is triethanolamine, formaldehyde, tetramethylthiourea, cinnamaldehyde, p-chlorobenzoic acid, vanillin, etc.
The preparation process of the intelligent steering agent comprises the following steps: firstly, taking a certain amount of water, then respectively adding glucosamine hydrochloride, N-methyl-D-glucosamine hydrochloride, a water-soluble regulator, a surfactant and a dispersing mutual solvent into the water, and uniformly stirring to prepare an intelligent steering agent main agent; the acrylamide, the N, N methylene bisacrylic acid amine and the accelerator are mixed according to a certain proportion to prepare the intelligent steering agent auxiliary agent.
The intelligent steering agent on-site pumping method and flow are as follows: the intelligent steering agent main agent and the auxiliary agent are injected separately, wherein the main agent is injected from a sand mixing vehicle at a higher discharge capacity, and the auxiliary agent is injected by adopting a pump at a small discharge capacity; injecting a first stage of fracturing fluid according to the fracturing design, and fracturing a first crack; injecting an intelligent steering main agent and an auxiliary agent according to a required proportion, so that the intelligent steering main agent and the auxiliary agent are mixed in a shaft and enter a crack to form temporary plugging;
compared with the existing coalbed methane temporary plugging steering agent technology, the invention has the following beneficial effects:
(1) The intelligent steering agent is in a liquid state under the ground condition, has low viscosity and good injectability;
(2) After the intelligent steering agent is injected into a coal bed, the intelligent steering agent can be subjected to temperature stimulation to change from a liquid state to a solid state under the low-temperature condition of a coal reservoir, the phase change time can be adjusted by adjusting the temperature without adding other temporary plugging agents, and the formed solid phase temporary plugging is a non-porous longitudinal plane plugging and a transverse volume plugging, so that the plugging strength is high and no seam exists;
(3) The intelligent steering agent can be completely liquefied from a solid state to a liquid state under certain temperature and time conditions, the liquefied liquid has low viscosity and is easy to flow back, and the damage of residual coal seams can not be caused.
Drawings
FIG. 1 is a graph of adsorption and desorption of coal after intelligent diverter soaking.
Detailed Description
Example 1
Firstly, taking 5g of lactic acid in 69.4g of water solution, then respectively adding glucosamine hydrochloride (15 g), N-methyl-D-glucosamine hydrochloride (10 g), sodium alkylaryl sulfonate (0.4 g) and isopropanol (0.2 g) into the water solution, stirring and mixing uniformly, and carrying out nitrogen protection reaction at 80 ℃ for 6 hours to prepare the intelligent steering agent main agent; mixing acrylamide (70 g), N methylene bisacrylamide (20 g) and triethanolamine (10 g) uniformly, and reacting at 60 ℃ for 5 hours to prepare the auxiliary agent.
The prepared intelligent steering main agent and auxiliary agent are prepared according to the mass ratio of 100:4, are uniformly mixed and put into water bath at 40 ℃ for heating, the phenomenon is observed every 1min, and the solidification starting time, the complete gel forming solidification time, the liquefaction starting time and the liquefaction rate are recorded. The intelligent steering agent in the proportion starts to solidify after 13min, completely changes the liquid phase into the solid phase after 26min, starts to liquefy after 60min, reaches 42.9% after 220min, and completely liquefies after 60 days.
Example 2
Firstly, taking 5g of lactic acid in 69.4g of water solution, then respectively adding glucosamine hydrochloride (15 g), N-methyl-D-glucosamine hydrochloride (10 g), sodium alkylaryl sulfonate (0.4 g) and isopropanol (0.2 g) into the water solution, stirring and mixing uniformly, and carrying out nitrogen protection reaction at 80 ℃ for 6 hours to prepare the intelligent steering agent main agent; mixing acrylamide (70 g), N methylene bisacrylamide (20 g) and triethanolamine (10 g) uniformly, and reacting at 60 ℃ for 5 hours to prepare the auxiliary agent.
The prepared intelligent steering main agent and auxiliary agent are prepared according to the mass ratio of 100:6, are uniformly mixed and put into water bath at 40 ℃ for heating, the phenomenon is observed every 1min, and the solidification starting time, the complete gel forming solidification time, the liquefaction starting time and the liquefaction rate are recorded. The intelligent steering agent in the proportion starts to solidify after 9min, completely changes the liquid phase into the solid phase after 19min, starts to liquefy after 55min, has the liquefaction rate reaching 50% at 165min and does not increase in the subsequent 30min, and is found to be completely liquefied in about 60 days in the subsequent observation.
Example 3
Firstly, taking 5g of lactic acid in 69.4g of water solution, then respectively adding glucosamine hydrochloride (15 g), N-methyl-D-glucosamine hydrochloride (10 g), sodium alkylaryl sulfonate (0.4 g) and isopropanol (0.2 g) into the water solution, stirring and mixing uniformly, and carrying out nitrogen protection reaction at 80 ℃ for 6 hours to prepare the intelligent steering agent main agent; mixing acrylamide (70 g), N methylene bisacrylamide (20 g) and triethanolamine (10 g) uniformly, and reacting at 60 ℃ for 5 hours to prepare the auxiliary agent.
The prepared intelligent steering main agent and auxiliary agent are prepared according to the mass ratio of 100:8, are uniformly mixed and put into water bath at 40 ℃ for heating, the phenomenon is observed every 1min, and the solidification starting time, the complete gel forming solidification time, the liquefaction starting time and the liquefaction rate are recorded. The intelligent steering agent in the proportion starts to solidify after 5min, completely changes the liquid phase into the solid phase after 11min, starts to liquefy after 50min, has the liquefaction rate reaching 52.6% after 170min and has no increase in the liquefaction rate within the next 20min, and is found to be completely liquefied in about 55 days in the subsequent observation.
Example 4
Firstly, taking 5g of lactic acid in 69.4g of water solution, then respectively adding glucosamine hydrochloride (15 g), N-methyl-D-glucosamine hydrochloride (10 g), sodium alkylaryl sulfonate (0.4 g) and isopropanol (0.2 g) into the water solution, stirring and mixing uniformly, and carrying out nitrogen protection reaction at 80 ℃ for 6 hours to prepare the intelligent steering agent main agent; mixing acrylamide (70 g), N methylene bisacrylamide (20 g) and triethanolamine (10 g) uniformly, and reacting at 60 ℃ for 5 hours to prepare the auxiliary agent.
The prepared intelligent steering main agent and auxiliary agent are prepared according to the mass ratio of 100:10, are uniformly mixed and put into water bath at 40 ℃ for heating, the phenomenon is observed every 1min, and the solidification starting time, the complete gel forming solidification time, the liquefaction starting time and the liquefaction rate are recorded. The intelligent steering agent in the proportion starts to solidify after 3min, completely changes the liquid phase into the solid phase after 7min, starts to liquefy after 40min, has the liquefaction rate reaching 54.2% in 160min and does not increase in the next 20min, and the intelligent steering agent in the proportion is found to be completely liquefied in about 50 days in the subsequent observation.
Table 1 intelligent diverter table for curing liquefaction experiments at 40 c
Table 2 example 1 intelligent diverter liquefaction test record table
| Time (min) | Liquefaction Rate (%) |
| 60 | 2.4 |
| 90 | 7.1 |
| 100 | 9.5 |
| 110 | 11.9 |
| 120 | 14.3 |
| 130 | 19 |
| 140 | 21.4 |
| 150 | 23.8 |
| 160 | 28.6 |
| 170 | 31 |
| 180 | 33.3 |
| 190 | 35.7 |
| 200 | 38.1 |
| 210 | 40.5 |
| 220 | 42.9 |
Table 3 example 2 intelligent diverter liquefaction test record table
Table 4 example 3 intelligent diverter liquefaction test record table
| Time (min) | Liquefaction Rate (%) |
| 50 | 4.8 |
| 60 | 9.7 |
| 70 | 23.5 |
| 80 | 33.7 |
| 90 | 35.7 |
| 100 | 38 |
| 110 | 40.1 |
| 120 | 42.5 |
| 130 | 45.8 |
| 140 | 47.9 |
| 150 | 50.2 |
| 160 | 51.3 |
| 170 | 52.6 |
| 180 | 52.6 |
| 190 | 52.6 |
TABLE 5 example 4 Intelligent steering agent liquefaction experiment record table
Test examples
The intelligent steering agents of test examples 1 to 4 were selected, and pipeline bearing capacity was evaluated using a pipeline with a diameter of 5 mm. Experimental temperature: 40 ℃, line length: 30cm, 75cm and 150cm, heating the pipeline to the corresponding temperature, injecting the intelligent steering agent at the displacement of 0.1ml/min, solidifying the intelligent steering agent in the pipeline, gradually increasing the pressure to a certain value, and enabling the solidified solid to flow out, wherein the pressure value is the pressure bearing capacity of the intelligent steering agent.
Table 6 Intelligent pressure-bearing capacity recording table for steering agent
Test examples
The liquefied liquid of test example 4 was selected to soak coal dust, and the influence of the soaking of the liquefied liquid of the intelligent steering agent on the adsorption and desorption capacities of the coal was tested by using a full-automatic adsorption gas content test system, and the experimental results are shown in fig. 1.
As can be seen from table 1, under the same temperature condition, as the main and auxiliary agent proportion of the intelligent steering agent increases, the initial curing time, the complete curing time and the initial liquefying time of the intelligent steering agent are gradually shortened, which indicates that the phase change time of the intelligent steering agent can be adjusted by adjusting the proportion of the main and auxiliary agents of the formula; as can be seen from tables 2 to 5, the intelligent steering agents in the ratio in Table 4 have about 50% of liquefaction rate in a short time, and have complete liquefaction time of 50 to 60 days, so that the intelligent steering agents can be completely liquefied and have no damage to stratum; as shown in Table 6, with the increase of the main and auxiliary agent proportions of the intelligent steering agent, the pressure bearing capacity of the intelligent steering agent is slightly increased, and 4 intelligent steering agents with proportions in a pipeline of 1.5m can bear about 12MPa, so that the plugging strength is good; as can be seen from fig. 1, after being soaked in the intelligent diversion agent liquefied solution, the adsorption curve and desorption curve of the coal move slightly downwards, which means that the adsorption amount and desorption amount of the coal are slightly reduced after being soaked in the intelligent diversion agent liquefied solution, but the reduction amount is very small, namely, the adsorption and desorption capacity of the coal powder is hardly affected by the soaking of the intelligent diversion agent liquefied solution.
In summary, the intelligent steering agent for coal bed gas exploitation provided by the invention is prepared from glucosamine hydrochloride, N-methyl-D-glucosamine hydrochloride 1, a water-soluble regulator, a surfactant, a dispersing mutual solvent, acrylamide, N, N-methylene bisacrylamide, an accelerator and the like serving as raw materials. The coal reservoir is in a liquid state at normal temperature, the liquid state is changed from a liquid state to a solid state under certain temperature and time conditions, the longitudinal plane blockage and the transverse volume blockage of the coal reservoir can be realized, the coal reservoir has stronger blocking strength, the liquid state is completely changed from the solid state to the liquid state under certain temperature and time conditions, the liquefied liquid can not cause damage to the coal reservoir, the coal reservoir can be smoothly returned, and the construction is convenient.
The above-described examples are some, but not all, examples of the invention. The detailed description of the implementations of the present invention is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. All other examples, which a person of ordinary skill in the art would obtain without undue burden based on the embodiments of the invention, are within the scope of the invention.
Claims (5)
1. An intelligent steering agent for coal bed gas exploitation is characterized by comprising the following components in percentage by weight: 5 to 15 percent of glucosamine hydrochloride, 10 to 20 percent of N-methyl-D-glucosamine hydrochloride, 1 to 20 percent of water-soluble regulator, 0.2 to 0.5 percent of surfactant, 0.1 to 0.2 percent of dispersing mutual solvent, 5 to 20 percent of acrylamide, 1 to 10 percent of N, N-methylene bisacrylamide, 5 to 10 percent of accelerator and 50 to 60 percent of water, wherein the surfactant is one of polyoxyethylene alkylphenol ether, sodium alkylaryl sulfonate and sodium dodecyl benzene sulfonate.
2. An intelligent diverter for coal bed gas production as claimed in claim 1, wherein the water-soluble regulator is one of lactic acid, acetic acid, tartaric acid, malic acid, fumaric acid.
3. The intelligent steering agent for coal bed gas exploitation according to claim 1, wherein the dispersing mutual solvent is one of isopropanol, ethylene glycol monobutyl ether, sodium oleate and hexenyl bis stearamide.
4. The intelligent diversion agent for coal bed gas exploitation according to claim 1, wherein the accelerator is one of triethanolamine, formaldehyde, tetramethylthiourea, cinnamaldehyde, p-chlorobenzoic acid and vanillin.
5. A method for preparing an intelligent diverter for coal bed gas production as claimed in any one of claims 1 to 4, comprising the steps of: firstly, taking a certain amount of water, then respectively adding glucosamine hydrochloride, N-methyl-D-glucosamine hydrochloride, a water-soluble regulator, a surfactant and a dispersing mutual solvent into the water, and uniformly stirring to prepare an intelligent steering agent main agent; the acrylamide, the N, N methylene bisacrylic acid amine and the accelerator are mixed according to a certain proportion to prepare the intelligent steering agent auxiliary agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010164238.3A CN111269703B (en) | 2020-03-11 | 2020-03-11 | Intelligent steering agent for coal bed gas exploitation and preparation method thereof |
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| CN107129560A (en) * | 2017-04-20 | 2017-09-05 | 常州市鼎升环保科技有限公司 | A kind of preparation method of particle diverting agent |
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| CN110591684A (en) * | 2019-09-24 | 2019-12-20 | 中国海洋石油集团有限公司 | Two-phase temperature response phase change fracturing fluid system |
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