CN111647395A - Two-phase double-degradation oil well corrosion-resistant scale-resistant wax-control slow-release particles - Google Patents
Two-phase double-degradation oil well corrosion-resistant scale-resistant wax-control slow-release particles Download PDFInfo
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- 230000007797 corrosion Effects 0.000 title claims abstract description 38
- 238000005260 corrosion Methods 0.000 title claims abstract description 38
- 239000003129 oil well Substances 0.000 title claims abstract description 38
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- 238000006731 degradation reaction Methods 0.000 title description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000011347 resin Substances 0.000 claims abstract description 32
- 229920005989 resin Polymers 0.000 claims abstract description 32
- 239000007787 solid Substances 0.000 claims abstract description 30
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 14
- IYEJVYCOCVJYNV-UHFFFAOYSA-N P1(=O)OC(CO)OP(O1)=O.[Na].[Na] Chemical compound P1(=O)OC(CO)OP(O1)=O.[Na].[Na] IYEJVYCOCVJYNV-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000003208 petroleum Substances 0.000 claims abstract description 9
- BPSYZMLXRKCSJY-UHFFFAOYSA-N 1,3,2-dioxaphosphepan-2-ium 2-oxide Chemical compound O=[P+]1OCCCCO1 BPSYZMLXRKCSJY-UHFFFAOYSA-N 0.000 claims abstract description 8
- BEGBSFPALGFMJI-UHFFFAOYSA-N ethene;sodium Chemical group [Na].C=C BEGBSFPALGFMJI-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 7
- 239000002904 solvent Substances 0.000 claims abstract description 6
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 claims abstract description 5
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims abstract description 5
- 239000003054 catalyst Substances 0.000 claims abstract description 5
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims abstract description 5
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims abstract description 5
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims abstract description 5
- 230000005764 inhibitory process Effects 0.000 claims description 23
- 238000000354 decomposition reaction Methods 0.000 claims description 20
- 238000005536 corrosion prevention Methods 0.000 claims description 14
- 238000002360 preparation method Methods 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 9
- 230000008021 deposition Effects 0.000 abstract description 5
- 239000001993 wax Substances 0.000 description 22
- 239000003112 inhibitor Substances 0.000 description 19
- 239000003921 oil Substances 0.000 description 12
- 239000003814 drug Substances 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000012188 paraffin wax Substances 0.000 description 8
- 239000003350 kerosene Substances 0.000 description 6
- 239000002455 scale inhibitor Substances 0.000 description 5
- 229940120146 EDTMP Drugs 0.000 description 4
- NFDRPXJGHKJRLJ-UHFFFAOYSA-N edtmp Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CCN(CP(O)(O)=O)CP(O)(O)=O NFDRPXJGHKJRLJ-UHFFFAOYSA-N 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 229910052708 sodium Inorganic materials 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
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- 239000007789 gas Substances 0.000 description 3
- 230000002401 inhibitory effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910021645 metal ion Inorganic materials 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- QXNVGIXVLWOKEQ-UHFFFAOYSA-N Disodium Chemical compound [Na][Na] QXNVGIXVLWOKEQ-UHFFFAOYSA-N 0.000 description 2
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical compound OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
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- 230000002265 prevention Effects 0.000 description 2
- YPPQYORGOMWNMX-UHFFFAOYSA-L sodium phosphonate pentahydrate Chemical compound [Na+].[Na+].[O-]P([O-])=O YPPQYORGOMWNMX-UHFFFAOYSA-L 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- DBVJJBKOTRCVKF-UHFFFAOYSA-N Etidronic acid Chemical compound OP(=O)(O)C(O)(C)P(O)(O)=O DBVJJBKOTRCVKF-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- XQRLCLUYWUNEEH-UHFFFAOYSA-L diphosphonate(2-) Chemical compound [O-]P(=O)OP([O-])=O XQRLCLUYWUNEEH-UHFFFAOYSA-L 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000003211 malignant effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000013268 sustained release Methods 0.000 description 1
- 239000012730 sustained-release form Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
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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
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
-
- 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
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/524—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning organic depositions, e.g. paraffins or asphaltenes
-
- 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
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/536—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning characterised by their form or by the form of their components, e.g. encapsulated material
-
- 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
- C09K8/54—Compositions for in situ inhibition of corrosion 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
- 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
-
- 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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/02—Equipment or details not covered by groups E21B15/00 - E21B40/00 in situ inhibition of corrosion in boreholes or wells
-
- 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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/32—Anticorrosion additives
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention provides a two-phase double-hydrolysis oil well corrosion-resistant scale-inhibition wax-control slow-release particle which comprises, by mass, 45% -55% of oil-water miscible resin, 15% -25% of disodium hydroxyethylidene diphosphonate, 15% -25% of sodium ethylene diamine tetramethylene phosphonate and 5% -15% of a solid wax-control agent. The oil-water miscible resin is a product obtained by reacting polyvinylpyrrolidone with C9 petroleum resin at 200 ℃ and 5.0MPa for 4 hours by using cyclohexane as a solvent and aluminum trichloride as a catalyst. The invention can protect the oil well from the source, and can inhibit the phenomena of scaling, corrosion, wax deposition and the like of the oil well in an all-around and long-acting way without adding an additional treatment process.
Description
Technical Field
The invention belongs to the technical field of oil and gas exploitation, relates to the technical field of chemicals for increasing production of oil and gas wells, and particularly relates to a two-phase double-decomposition oil well corrosion-resistant, scale-resistant and wax-proof slow-release particle. The invention also provides a preparation method and application of the sustained-release granules.
Background
In each production link of drilling, oil extraction, gathering and transportation and the like in the petroleum industry, from an oil-water well to pipelines, storage tanks and various process equipment, the phenomena of serious corrosion, scaling, wax deposition and the like are suffered, the damage to the equipment and the pipelines is aggravated, serious malignant accidents are caused, the personal health of field operating personnel is seriously endangered, and the pollution to the surrounding environment is caused. Due to the phenomena of corrosion, scaling, wax deposition and the like of pipelines and equipment, the loss of products is caused, the production cost of the petroleum industry is increased, and even the normal production is influenced. In particular, in recent years, the problems of water content increase, equipment aging, corrosion and scaling of crude oil become more and more serious when a plurality of oil field production developments enter the later production stage.
At present, the corrosion prevention, scale removal and paraffin removal are generally finished independently in three links, most of the chemicals such as scale inhibition and paraffin removal of liquid are directly injected into a well, the chemicals often flow away or adhere to the pipe wall along with produced liquid quickly and need to be continuously and frequently injected, and a lot of troubles are brought to production and management. Solid scale inhibitors are relatively researched more, and are mostly single scale inhibitors or corrosion inhibitors, a special dosing tool is generally needed, and meanwhile, the currently researched and developed solid scale inhibitors have the technical problems of quick release, short validity period and the like, and cannot effectively solve the problems in the current oil well development process.
The fracturing fluid is prepared from surface fresh water, scaling tendency is possibly generated due to incompatibility with formation water, the fracturing fluid remained in the formation is at the far end of a crack, and the reconstruction volume is reduced once scaling occurs.
Disclosure of Invention
The invention provides a two-phase double-decomposition oil well corrosion-resistant scale-resistant wax-control slow-release particle, which aims to effectively solve the practical problems of corrosion, scaling, wax deposition and the like of equipment and pipelines in the petroleum industry and the technical problem of unsatisfactory protective effect of a stratum fracture section. Specifically, the present invention adopts the following technical solutions.
The two-phase double-hydrolysis oil well corrosion-resistant scale-inhibiting wax-proofing slow-release granules are made up by using (by wt%) 45% -55% of oil-water miscible resin, 15% -25% of hydroxy-ethylidene diphosphonic acid disodium, 15% -25% of ethylenediamine tetramethylene sodium phosphonate and 5% -15% of solid wax-proofing agent.
Furthermore, the invention provides a preparation description of the oil-water miscible resin, namely a product obtained by reacting the polyvinylpyrrolidone and the C9 petroleum resin at 200 ℃ and 5.0MPa for 4 hours by taking cyclohexane as a solvent and aluminum trichloride as a catalyst. The inventor of the patent application discovers that the oil-water miscible resin is an excellent inclusion and has good compatibility with the selected solid scale inhibitor, corrosion inhibitor and wax inhibitor.
As a preferred embodiment of the two-phase double-decomposition oil well corrosion-prevention scale-inhibition wax-prevention slow-release particle, the solid wax-prevention agent is one of SN-2 solid wax-prevention agent and PY-1 solid wax-prevention agent. The SN-2 solid wax inhibitor is a solid wax inhibitor which takes high-pressure polyethylene as a main component and is purchased from the university of Petroleum in southwest. The PY-1 solid paraffin inhibitor is a novel slow-release solid paraffin inhibitor developed by the Western-An petroleum university, and the PY-1 solid paraffin inhibitor used in the invention is purchased from the Western-An petroleum university.
In addition, the invention provides a preparation method of the two-phase double-degradation oil well corrosion-prevention scale-inhibition wax-prevention slow-release particle, which is formed by taking synthesized oil-water-miscible resin as an inclusion, and melting, extruding, cooling and granulating the scale inhibitor, the corrosion inhibitor and the solid wax inhibitor at high temperature. Specifically, under the temperature of the melting point of the oil-water miscible resin, the disodium hydroxyethylidene diphosphonate, the sodium ethylene diamine tetramethylenephosphonate and the solid wax inhibitor are mixed and extruded for granulation.
The two-phase double-decomposition oil well corrosion-resistant, scale-inhibiting and wax-proofing slow-release particles prepared by the method are proved by performance verification to have the scale inhibition rate of not less than 85 percent, the corrosion inhibition rate of not more than 0.076mm/a, the wax-proofing rate of not less than 40 percent and the release period of not less than 60 days.
In addition, the invention provides the application of the two-phase double-decomposition oil well corrosion-resistant scale-inhibition wax-control slow-release particles in oil and gas well operation.
Compared with the prior art, the two-phase double-decomposition oil well corrosion-prevention scale-inhibition wax-prevention slow-release particles have at least the following beneficial effects or advantages.
1) The invention creatively develops an oil-water miscible resin, which is a product obtained by reacting polyvinylpyrrolidone and C9 petroleum resin at 200 ℃ and 5.0MPa for 4 hours by taking cyclohexane as a solvent and aluminum trichloride as a catalyst. The oil-water miscible resin is an oil-water miscible resin inclusion, can be slowly dissolved in oil and water, and after being wrapped with the hydroxy ethylidene diphosphonate disodium, the ethylene diamine tetramethylene sodium phosphonate and the solid paraffin inhibitor, the medicament has high compressive strength and can be directly prepared into particles.
2) The two-phase double-decomposition oil well corrosion-resistant scale-inhibition wax-control slow-release particles and the fracturing sand are mixed and then added, and a medicine adding process is not needed; the wax-proofing component is added into the slow-release particles prepared by the invention, so that the wax precipitation of an oil well can be effectively prevented, and particularly, the whole crack section can be protected, which is a technical effect which cannot be achieved by singly adopting shaft wax-proofing.
3) The oil-water miscible resin has a functional carrier which generates certain deformation under pressure, is embedded between a crack and a sand bed, cannot be left on the ground along with flow-back liquid, and ensures long-acting slow release of components.
4) By combining the advantages, the invention can protect the oil well from the source, inhibit the phenomena of scaling, corrosion, wax deposition and the like of the oil well in an all-around and long-acting manner, and does not need to add an additional treatment process.
Detailed Description
In order to facilitate understanding of the objects, technical solutions and effects of the present invention, the present invention will be further described in detail with reference to examples.
Example 1
This example illustrates the preparation of the two-phase double-decomposition oil well corrosion-resistant scale-inhibiting wax-control slow-release particles. The two-phase double-hydrolysis oil well corrosion-prevention scale-inhibition wax-prevention slow-release particles prepared by the embodiment comprise oil-water miscible resin, disodium hydroxyethylidene diphosphonate, sodium ethylene diamine tetramethylenephosphonate and a solid wax-prevention agent.
The oil-water miscible resin is a resin inclusion which can be mixed with oil and water, or is called a functional carrier with certain pressure-bearing performance, and is a product obtained by reacting polyvinylpyrrolidone and C9 petroleum resin at 200 ℃ and 5.0MPa for 4 hours by using cyclohexane as a solvent and aluminum trichloride as a catalyst.
Disodium hydroxyethylidene diphosphonate (HEDP. Na2) is an organic phosphonic acid scale and corrosion inhibitor, can form a stable complex with various metal ions such as iron, copper, zinc and the like, can dissolve oxides on the surface of metal, and is suitable for metal cleaning, metal treatment, metal ion control and the like.
The ethylenediamine tetramethylene phosphonic acid sodium (EDTMPS) belongs to a nitrogen-containing organic polybasic phosphonic acid, belongs to a cathode corrosion inhibitor, can be mixed with water, is non-toxic and pollution-free, and can be dissociated into 8 positive and negative ions in an aqueous solution, so that the ethylenediamine tetramethylene phosphonic acid sodium can be chelated with a plurality of metal ions to form a macromolecular reticular complex with a plurality of monomer structures, and the macromolecular reticular complex is loosely dispersed in water.
The solid wax-proofing agent is SN-2 solid wax-proofing agent or PY-1 solid wax-proofing agent.
45-55 percent of oil-water miscible resin, 15-25 percent of hydroxy ethylidene diphosphonic acid disodium, 15-25 percent of ethylene diamine tetramethylene phosphonic acid sodium and 5-15 percent of solid paraffin inhibitor are mixed according to the mass percentage, the oil-water miscible resin can well wrap the hydroxy ethylidene diphosphonic acid disodium, the ethylene diamine tetramethylene phosphonic acid sodium and the solid paraffin inhibitor at the melting point temperature of the oil-water miscible resin, and granulation is carried out according to the production requirement, thus obtaining the two-phase double-hydrolysis oil well corrosion-prevention scale-inhibition paraffin-control slow-release particles.
According to the method of the embodiment, three two-phase double-decomposition oil well corrosion-resistant, scale-resistant and wax-control slow-release particles are prepared, and the numbers of the particles are FDFG-01, FDFG-02 and FDFG-03 respectively.
FDFG-01 formula and content: 45% of oil-water miscible resin, 25% of disodium hydroxyethylidene diphosphonate, 25% of sodium ethylene diamine tetramethylenephosphonate and 5% of SN-2 solid wax inhibitor.
FDFG-02 formula and content: 50% of oil-water miscible resin, 20% of disodium hydroxyethylidene diphosphonate, 20% of sodium ethylene diamine tetramethylenephosphonate and 10% of PY-1 solid wax inhibitor.
FDFG-03 formula and content: 55% of oil-water miscible resin, 15% of disodium hydroxyethylidene diphosphonate, 15% of sodium ethylene diamine tetramethylenephosphonate and 15% of SN-2 solid wax inhibitor.
Example 2
This example illustrates the scale inhibition rate, corrosion inhibition rate and wax control rate of the two-phase double-decomposition oil well corrosion and scale inhibition wax-control slow-release particles. The related experiments were carried out according to the methods described in Q/SY 126-2014 and SY/T6300-2009, and the experimental results are shown in Table 1.
3.00g of the two-phase double-decomposition oil well corrosion-prevention, scale-inhibition and wax-prevention slow-release particles FDFG-01, FDFG-02 and FDFG-03 prepared in example 1 are accurately weighed, placed in 300mL of water, kept stand for one week, filtered water sample after standing is taken for 250mL, and the scale inhibition rate, corrosion inhibition rate and wax prevention rate of the medicament are measured.
3.00g of the two-phase double-decomposition oil well corrosion-resistant, scale-inhibition and wax-control slow-release particles FDFG-01, FDFG-02 and FDFG-03 prepared in example 1 are accurately weighed, placed in 300mL of kerosene, kept stand for one week, filtered, added with 300mL of distilled water into filtrate, fully mixed and poured into a separating funnel, 250mL of separated water sample is taken, and the scale inhibition rate, corrosion inhibition rate and wax control rate of the medicament are measured.
TABLE 1 results of scale inhibition rate, corrosion inhibition rate and wax control rate measurement of two-phase double-decomposition oil well corrosion and scale inhibition wax control slow-release particles
As can be seen from Table 1, the scale inhibition rates of FDFG-01, FDFG-02 and FDFG-03 in a water sample are respectively 88.30%, 85.62% and 86.38%, and the scale inhibition rate is not lower than 85%; the corrosion inhibition rate of FDFG-03 is the maximum and is 0.059 mm/a; FDFG-01 had a minimum wax control of 45.30%.
As can be seen from Table 1, the scale inhibition ratios of FDFG-01, FDFG-02 and FDFG-03 in the kerosene sample were 89.61%, 90.28% and 87.13%, respectively, and the scale inhibition ratio was not less than 87%; the corrosion inhibition rate of FDFG-01 is the maximum and is 0.072 mm/a; FDFG-01 had the lowest wax control, 42.45%.
The detection result of the embodiment shows that the two-phase double-decomposition oil well corrosion-prevention, scale-inhibition and wax-prevention slow-release particles meet the index requirements of the oil field industry in three aspects of scale inhibition, corrosion inhibition and wax prevention.
Example 3
On the basis of the above embodiments, this embodiment describes the slow release performance of the two-phase double-decomposition oil well corrosion-prevention, scale-inhibition and wax-prevention slow release particles. Experiment the dissolution time of FDFG-01, FDFG-02 and FDFG-03 in water and kerosene was respectively tested in a water bath at 50 ℃, and the experimental results are shown in Table 2.
TABLE 2 slow-release performance test results of the two-phase double-decomposition oil well corrosion-resistant scale-inhibition wax-control slow-release particles
| Medicament | Solvent(s) | Initial mass (g) | Mass (g) after 60 days |
| FDFG-01 | Water (W) | 5.003 | 0.105 |
| FDFG-01 | Kerosene oil | 5.012 | 0.523 |
| FDFG-02 | Water (W) | 5.047 | 0.915 |
| FDFG-02 | Kerosene oil | 5.008 | 1.052 |
| FDFG-03 | Water (W) | 5.036 | 1.238 |
| FDFG-03 | Kerosene oil | 5.027 | 1.573 |
As can be seen from the table 2, the two-phase double-decomposition oil well corrosion-prevention scale-inhibition wax-control slow-release particles FDFG-01, FDFG-02 and FDFG-03 have the release period of more than 60 days at the ambient temperature of 50 ℃, and the release period is prolonged along with the increase of the addition amount of the oil-water miscible resin, namely, the use amount of the oil-water miscible resin can be adjusted according to the field requirement, and the release period of the medicament can be adjusted.
The corrosion-resistant, scale-resistant and wax-resistant slow-release particles for the two-phase oil well are prepared by coating a medicament with synthetic oil-water miscible resin with strength, can be brought into the stratum along with fracturing sand, comprehensively protect oil wells, oil pipelines and equipment from the source, do not need an additional medicament adding process, are independent in medicament existence, do not need to consider the problem of compatibility with fracturing materials and the stratum, and are economical, environment-friendly and practical.
The present invention has been further described with reference to the examples, but the present invention is not limited to the above-described embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (6)
1. The two-phase double-hydrolysis oil well corrosion-resistant scale-inhibition wax-control slow-release particle is characterized by comprising, by mass, 45% -55% of oil-water miscible resin, 15% -25% of disodium hydroxyethylidene diphosphonate, 15% -25% of sodium ethylene diamine tetramethylene phosphonate and 5% -15% of a solid wax-control agent.
2. The two-phase double-hydrolysis oil well corrosion-prevention, scale-inhibition and wax-prevention slow-release particle as claimed in claim 1, wherein the oil-water miscible resin is a product obtained by reacting polyvinylpyrrolidone and C9 petroleum resin at 200 ℃ and 5.0MPa for 4 hours with cyclohexane as a solvent and aluminum trichloride as a catalyst.
3. The two-phase double-decomposition oil well corrosion-prevention scale-inhibition wax-prevention slow-release particle as claimed in claim 1, wherein the solid wax-prevention agent is one of SN-2 solid wax-prevention agent and PY-1 solid wax-prevention agent.
4. The preparation method of the two-phase double-hydrolysis oil well corrosion-resistant scale-inhibition wax-control slow-release particle as claimed in claim 1, wherein the oil-water miscible resin, the disodium hydroxyethylidene diphosphonate, the sodium ethylene diamine tetramethylene phosphonate and the solid wax-control agent are mixed at the melting point temperature of the oil-water miscible resin, and then extruded and granulated.
5. The preparation method of claim 1, wherein the scale inhibition rate of the two-phase double-decomposition oil well corrosion-prevention, scale-inhibition and wax-prevention slow-release particles is not less than 85%, the corrosion inhibition rate is not more than 0.076mm/a, the wax-prevention rate is not less than 40%, and the release period is not less than 60 days.
6. The two-phase double-decomposition oil well corrosion-prevention, scale-inhibition and wax-prevention slow-release particle as claimed in claim 1 is applied to oil and gas well operation.
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| CN202010645455.4A CN111647395A (en) | 2020-07-07 | 2020-07-07 | Two-phase double-degradation oil well corrosion-resistant scale-resistant wax-control slow-release particles |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112455867A (en) * | 2020-12-08 | 2021-03-09 | 内蒙古浦景聚合材料科技有限公司 | Underground medicament conveying protection device |
| CN116240005A (en) * | 2021-12-07 | 2023-06-09 | 西安长庆化工集团有限公司 | Multifunctional slow-release gel ball for oil well and preparation method and application thereof |
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| CN101402850A (en) * | 2008-11-11 | 2009-04-08 | 大庆石油管理局 | Process for producing corrosion-protection, antiscaling and wax-proof sustained-release particles for oil well |
| US20170158945A1 (en) * | 2015-12-04 | 2017-06-08 | Ecolab Usa Inc. | Controlled release solid scale inhibitors |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101402850A (en) * | 2008-11-11 | 2009-04-08 | 大庆石油管理局 | Process for producing corrosion-protection, antiscaling and wax-proof sustained-release particles for oil well |
| US20170158945A1 (en) * | 2015-12-04 | 2017-06-08 | Ecolab Usa Inc. | Controlled release solid scale inhibitors |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112455867A (en) * | 2020-12-08 | 2021-03-09 | 内蒙古浦景聚合材料科技有限公司 | Underground medicament conveying protection device |
| CN116240005A (en) * | 2021-12-07 | 2023-06-09 | 西安长庆化工集团有限公司 | Multifunctional slow-release gel ball for oil well and preparation method and application thereof |
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Application publication date: 20200911 |