CN114058344A - Multi-effect additive for natural gas exploitation and preparation method and application thereof - Google Patents
Multi-effect additive for natural gas exploitation and preparation method and application thereof Download PDFInfo
- Publication number
- CN114058344A CN114058344A CN202010794992.5A CN202010794992A CN114058344A CN 114058344 A CN114058344 A CN 114058344A CN 202010794992 A CN202010794992 A CN 202010794992A CN 114058344 A CN114058344 A CN 114058344A
- Authority
- CN
- China
- Prior art keywords
- natural gas
- effect additive
- parts
- inhibitor
- hydrate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 97
- 239000000654 additive Substances 0.000 title claims abstract description 59
- 230000000996 additive effect Effects 0.000 title claims abstract description 57
- 239000003345 natural gas Substances 0.000 title claims abstract description 49
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000003112 inhibitor Substances 0.000 claims abstract description 60
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 54
- -1 alkyl glycoside Chemical class 0.000 claims abstract description 14
- 239000002904 solvent Substances 0.000 claims abstract description 14
- 229930182470 glycoside Natural products 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000002738 chelating agent Substances 0.000 claims abstract description 10
- 239000005038 ethylene vinyl acetate Substances 0.000 claims abstract description 10
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 10
- BDAGIHXWWSANSR-UHFFFAOYSA-M Formate Chemical compound [O-]C=O BDAGIHXWWSANSR-UHFFFAOYSA-M 0.000 claims abstract description 9
- 239000000203 mixture Substances 0.000 claims description 52
- 238000000034 method Methods 0.000 claims description 19
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 11
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 10
- 230000004983 pleiotropic effect Effects 0.000 claims description 9
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 claims description 5
- 229920001577 copolymer Polymers 0.000 claims description 4
- XEKOWRVHYACXOJ-UHFFFAOYSA-N ethyl acetate Substances CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000002283 diesel fuel Substances 0.000 claims description 3
- WFIZEGIEIOHZCP-UHFFFAOYSA-M potassium formate Chemical compound [K+].[O-]C=O WFIZEGIEIOHZCP-UHFFFAOYSA-M 0.000 claims description 3
- 229940080258 tetrasodium iminodisuccinate Drugs 0.000 claims description 3
- GYBINGQBXROMRS-UHFFFAOYSA-J tetrasodium;2-(1,2-dicarboxylatoethylamino)butanedioate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]C(=O)CC(C([O-])=O)NC(C([O-])=O)CC([O-])=O GYBINGQBXROMRS-UHFFFAOYSA-J 0.000 claims description 3
- QGJDXUIYIUGQGO-UHFFFAOYSA-N 1-[2-[(2-methylpropan-2-yl)oxycarbonylamino]propanoyl]pyrrolidine-2-carboxylic acid Chemical compound CC(C)(C)OC(=O)NC(C)C(=O)N1CCCC1C(O)=O QGJDXUIYIUGQGO-UHFFFAOYSA-N 0.000 claims description 2
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 claims description 2
- 239000004280 Sodium formate Substances 0.000 claims description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical group CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 2
- 238000007323 disproportionation reaction Methods 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims description 2
- 150000004675 formic acid derivatives Chemical class 0.000 claims description 2
- 239000003350 kerosene Substances 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims description 2
- HLBBKKJFGFRGMU-UHFFFAOYSA-M sodium formate Chemical group [Na+].[O-]C=O HLBBKKJFGFRGMU-UHFFFAOYSA-M 0.000 claims description 2
- 235000019254 sodium formate Nutrition 0.000 claims description 2
- 229940005574 sodium gluconate Drugs 0.000 claims description 2
- 235000012207 sodium gluconate Nutrition 0.000 claims description 2
- 239000000176 sodium gluconate Substances 0.000 claims description 2
- 239000011269 tar Substances 0.000 claims description 2
- 125000003158 alcohol group Chemical group 0.000 claims 1
- 239000012188 paraffin wax Substances 0.000 abstract description 22
- 230000007797 corrosion Effects 0.000 abstract description 16
- 238000005260 corrosion Methods 0.000 abstract description 16
- 230000015572 biosynthetic process Effects 0.000 abstract description 15
- 230000008021 deposition Effects 0.000 abstract description 14
- 150000004677 hydrates Chemical class 0.000 abstract 1
- 238000000151 deposition Methods 0.000 description 14
- 239000011259 mixed solution Substances 0.000 description 13
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 description 11
- 239000003921 oil Substances 0.000 description 10
- 230000009286 beneficial effect Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000003756 stirring Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 239000003129 oil well Substances 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 230000002401 inhibitory effect Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 229910052788 barium Inorganic materials 0.000 description 2
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000013522 chelant Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000005429 filling process Methods 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 230000003000 nontoxic effect Effects 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002455 scale inhibitor Substances 0.000 description 2
- 229910052712 strontium Inorganic materials 0.000 description 2
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 239000001993 wax Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002343 natural gas well Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
-
- 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
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
- C09K8/035—Organic additives
-
- 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
- C09K8/54—Compositions for in situ inhibition of corrosion in boreholes or wells
Landscapes
- 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)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The invention provides a multi-effect additive for natural gas exploitation, a preparation method and application thereof, wherein the multi-effect additive comprises the following components: 1-3 parts of plant chelating agent, 1-5 parts of ethylene-vinyl acetate copolymer, 15-40 parts of alkyl glycoside, 5-15 parts of formate, 5-25 parts of solvent oil and 12-73 parts of water. The multi-effect additive can obviously reduce the dosage of thermodynamic inhibitors of hydrates such as methanol and the like, and can effectively inhibit the formation of natural gas hydrates and relieve the problems of paraffin deposition, pipeline corrosion, scaling and the like.
Description
Technical Field
The invention relates to the field of natural gas exploitation of oil and gas fields, in particular to a multi-effect additive for natural gas exploitation and a preparation method and application thereof
Background
In the natural gas exploitation process, not all produced natural gas of an oil well is natural gas, but a mixture of natural gas, crude oil, paraffin, water and the like is included, the natural gas is generally mixed with acidic substances such as carbon dioxide, hydrogen sulfide and the like, the water also contains metal ions such as calcium, magnesium, barium, strontium and the like, after the natural gas mixture is produced from the oil well, the natural gas mixture generally enters a gathering and transportation system through a choke, and finally is conveyed to a treatment plant (a treatment station) through the gathering and transportation system to be purified, so that a final natural gas product (commodity natural gas) is obtained. In the process, natural gas mixture produced by the oil well is throttled and absorbs heat due to expansion, the temperature of the whole produced product can be lowered, the low-temperature natural gas mixture flows to the natural gas treatment station from the wellhead, natural gas ice (natural gas hydrate) can be formed frequently, paraffin deposition can be generated, metal ions in water cause pipeline equipment scaling and phenomena that carbon dioxide, hydrogen sulfide and other acidic gases in the natural gas corrode pipelines and the like, the phenomena bring very adverse effects on a gathering and transportation pipeline network, even stop production in severe cases and influence the normal production of the natural gas.
At present, in order to prevent the formation of natural gas ice, a certain amount of hydrate inhibitors are usually added into a natural gas mixture produced by an oil well, and more commonly used are hydrate thermodynamic inhibitors such as methanol, ethylene glycol, triethylene glycol and the like, wherein alcohol inhibitors such as ethylene glycol, triethylene glycol and the like are high in price, generally need to be recovered and regenerated, and are high in investment and cost of recovery equipment, so that the comprehensive cost is high, while methanol has relatively low price and low comprehensive treatment cost, so that the methanol has wider application, but the methanol also has the problems of high toxicity, large using amount and the like and needs to be improved. In addition, in order to prevent the corrosion and scale formation of the gathering and transportation pipeline, a certain amount of corrosion inhibitor and scale inhibitor are often added, but the adding process is complex, the cost is high, the operation and the management are inconvenient, and for the problem of paraffin deposition, as the paraffin mixed in the natural gas mixture is mainly straight-chain hydrocarbon with the carbon atom number of 8-32, the conventional paraffin remover or paraffin inhibitor basically cannot play a paraffin control role.
Therefore, how to effectively achieve the purposes of inhibiting the formation of natural gas hydrate and reducing the dosage of a hydrate thermodynamic inhibitor, and simultaneously alleviate the problems of paraffin deposition, pipeline corrosion, scaling and the like is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The invention provides a multi-effect additive for natural gas exploitation, which is matched with a thermodynamic hydrate inhibitor for use, can effectively inhibit the formation of natural gas hydrate, can obviously reduce the dosage of the thermodynamic hydrate, and can effectively relieve the problems of paraffin deposition, pipeline corrosion, scaling and the like.
The invention also provides a preparation method of the multi-effect additive, the multi-effect additive can be prepared, and the preparation process is simple and easy to operate.
The invention also provides a multi-effect hydrate inhibitor for natural gas exploitation, which combines the multi-effect additive and the hydrate thermodynamic inhibitor to inhibit the formation of natural gas hydrate, paraffin deposition, pipeline corrosion and scaling.
The invention also provides application of the multi-effect additive in the natural gas exploitation process, which is beneficial to natural gas exploitation.
In one aspect of the invention, a multi-effect additive for natural gas exploitation is provided, which comprises the following components: 1-3 parts of plant chelating agent, 1-5 parts of ethylene-vinyl acetate copolymer, 15-40 parts of alkyl glycoside, 5-15 parts of formate, 5-25 parts of solvent oil and 12-73 parts of water.
The multi-effect additive provided by the invention can obviously reduce the dosage of a hydrate thermodynamic inhibitor, can be synergistically acted with the hydrate thermodynamic inhibitor, improves the inhibition effect on the formation of the natural gas hydrate, and can effectively relieve the problems of paraffin deposition, pipeline corrosion, scaling and the like in the natural gas exploitation process. In addition, the raw materials (components) of the multi-effect additive are all nontoxic and easily degradable plant compounds, so the multi-effect additive also has the advantages of safety, environmental protection and the like.
The inventor considers through research and analysis that under the additive composition system, the plant chelating agent can be combined with calcium, magnesium, strontium, barium and other ions in water associated with natural gas to form stable chelate (chelate), so that water is produced from a softening oil well, the content of active ions is reduced, the scale formation of natural gas produced from a gas well is inhibited, and a certain corrosion effect is realized on salt blocks with scale formed, so that the scale removal effect is achieved; the ethylene-vinyl acetate copolymer provides a wax precipitation crystal nucleus for the precipitation of the paraffin associated with the natural gas to form dispersed wax, so that the paraffin is prevented from depositing on the pipe wall to block the pipeline; the alkyl glycoside and the formate are used as kinetic inhibitors, can act synergistically with alcohol hydrate inhibitors (thermodynamic inhibitors), remarkably reduces the dosage of the hydrate thermodynamic inhibitors, and can be adsorbed on the inner wall of a pipeline to play a role in preventing pipeline corrosion and paraffin deposition.
According to the research of the invention, the multi-effect additive can be prepared according to the preparation process comprising the following steps: dissolving ethylene-ethyl acetate copolymer in solvent oil to obtain a composition A; dissolving alkyl glycoside, plant chelating agent and formate in water to obtain a composition B; and mixing the composition A and the composition B to obtain the multi-effect additive. The multi-effect additive prepared by the process is beneficial to the synergistic effect of all components, and achieves the effects of inhibiting hydrate formation, paraffin deposition, pipeline corrosion, scaling and the like.
In one embodiment of the present invention, the multi-effect additive comprises, by mass, 100% of a plant chelating agent 1-3 wt%, an ethylene-vinyl acetate copolymer 1-5 wt%, an alkyl glycoside 15-40 wt%, a formate 5-15 wt%, a solvent oil 5-25 wt%, and the balance water. Further, the alkyl glycoside may be 15 to 35 wt% and the solvent oil may be 5 to 20 wt%.
Specifically, the plant chelating agent may be one or more of sodium gluconate, sodium glucoheptonate and tetrasodium iminodisuccinate. The ethylene-vinyl acetate copolymer (EVA) has a vinyl acetate structure (VA) content of 18-32%, a Melt Index (MI) of not less than 100, and a disproportionation degree of 0.1-0.2, and in the specific implementation process, the EVA can be, for example, EVA220, EVA160, or a mixture of the two, and the like. The formate salt may be sodium formate or potassium formate or a mixture of the two. The alkyl glycoside (APG) may be one or more selected from APG1214, APG0812, APG0810, etc.
Furthermore, the solvent oil can be one or a mixture of more of kerosene, diesel oil, tar and benzene solvents. As in one embodiment, tar-benzene mixture (a mixture of tar and benzene mixture) may be used as the miscella.
In the present invention, the raw materials/reagents and the like used are commercially available or self-prepared by a method conventional in the art.
The multi-effect additive is convenient to use, does not need to change the existing filling process, can be usually used by being matched with a hydrate thermodynamic inhibitor, and can reduce the using amount of the hydrate thermodynamic inhibitor by more than 50-90%. Specifically, the multi-effect additive and the hydrate thermodynamic inhibitor can be mixed to form a uniform mixed solution (such as the multi-effect hydrate inhibitor described below), and then the mixed solution is filled into a wellhead pipeline (a natural gas conveying pipeline after a wellhead choke is throttled) of the natural gas well. According to the research of the invention, in the mixed solution, the mass of the multi-effect additive can be 5-80% of the mass of the hydrate thermodynamic inhibitor, further can be 10-70%, and for example can be 20-60%, or 30-60%, or 40-60%; the injection amount of the mixed solution (namely the amount of the mixed solution injected into a wellhead pipeline) can be 20-50% of the dosage of the conventional hydrate thermodynamic inhibitors such as methanol and the like, for example, 20-40%, compared with the dosage of the pure hydrate thermodynamic inhibitors such as methanol and the like, the mixed solution added with the multi-effect additive can obviously reduce the cost of medicaments (the mixed solution and the like used for the hydrate inhibitors in the natural gas exploitation process), and the mixed solution does not need to be recovered usually, so that the natural gas exploitation process is simplified, and the resources such as manpower, material resources and the like are saved.
In another aspect of the present invention, there is also provided a method for preparing the above multi-effect additive, comprising:
dissolving ethylene-ethyl acetate copolymer in solvent oil to obtain a composition A;
dissolving alkyl glycoside, plant chelating agent and formate in water to obtain a composition B;
and mixing the composition A and the composition B to obtain the multi-effect additive.
In the preparation process, according to the weight parts of the components, firstly, the composition A and the composition B are respectively prepared, and then the composition A and the composition B are mixed to obtain the multi-effect additive. The process is beneficial to the synergistic cooperation of all components, so that the prepared multi-effect additive has excellent comprehensive performance, is used in combination with a hydrate thermodynamic inhibitor, effectively inhibits the formation of natural gas hydrate, greatly reduces the dosage of the hydrate thermodynamic inhibitor, and effectively relieves the problems of paraffin deposition, pipeline corrosion, scaling and the like.
In specific implementation, the solvent oil can be heated to 50-80 ℃, and then the ethylene-ethyl acetate copolymer is added into the solvent oil to be completely dissolved, so as to obtain a uniform solution (namely the composition A); the alkyl glycoside, the plant chelating agent and the formate can be sequentially added into water under stirring state until being completely dissolved, so as to obtain a uniform composition B; and then adding the composition B into the composition A under the stirring state, and uniformly mixing to obtain the multi-effect additive. Wherein, the composition A can be cooled to below 20-40 ℃ and then mixed with the composition B.
In still another aspect of the present invention, there is provided a pleiotropic hydrate inhibitor for natural gas exploitation, comprising a hydrate thermodynamic inhibitor and the above pleiotropic additive.
The thermodynamic hydrate inhibitor may be a thermodynamic inhibitor conventional in the art, for example, an alcohol inhibitor commonly used in natural gas extraction processes, and the alcohol inhibitor may be specifically one or a mixture of several of methanol, ethanol, ethylene glycol, diethylene glycol, and triethylene glycol. In some preferred embodiments, the thermodynamic inhibitor may be one or more of methanol, ethylene glycol, and triethylene glycol.
In one embodiment of the invention, a multi-effect additive can be added into the hydrate thermodynamic inhibitor, and the mixture is uniformly stirred to prepare a mixed solution, so that the multi-effect hydrate inhibitor is obtained.
Specifically, in the above pleiotropic hydrate inhibitor, the mass of the pleiotropic additive may be generally 5 to 80% of the mass of the hydrate thermodynamic inhibitor.
In still another aspect of the invention, the application of the multi-effect additive in the natural gas exploitation process is also provided.
The implementation of the invention has at least the following beneficial effects:
the multi-effect additive provided by the invention is used in combination with a hydrate thermodynamic inhibitor, can effectively inhibit the formation of natural gas hydrate, can reduce the using amount of the thermodynamic hydrate, can effectively relieve the problems of paraffin deposition, pipeline corrosion, scaling and the like, does not need to be additionally filled with a paraffin inhibitor, a corrosion inhibitor, a scale inhibitor and the like, and greatly reduces the comprehensive cost of natural gas exploitation; the components of the multi-effect additive are all nontoxic and easily degradable plant compounds, and the dosage of a toxic hydrate thermodynamic inhibitor can be greatly reduced, so that the exploitation process of natural gas is more environment-friendly; the multi-effect additive can be filled into a natural gas wellhead pipeline along with a hydrate thermodynamic inhibitor, does not need to change the existing filling process, and is convenient to use. Therefore, the multi-effect additive is very beneficial to industrial application.
The preparation method of the multi-effect additive provided by the invention can prepare the multi-effect additive, has the advantages of simple preparation process, easiness in operation, low cost and the like, and is beneficial to industrial production.
The multi-effect hydrate inhibitor provided by the invention has multiple effects of inhibiting formation of natural gas hydrate, paraffin deposition, pipeline corrosion, scaling and the like, has the advantages of low cost, environmental protection and the like, and is very beneficial to practical application.
The application of the multi-effect additive in the natural gas exploitation process can effectively inhibit the formation of natural gas hydrate and relieve the problems of paraffin deposition, pipeline corrosion and scaling, and is beneficial to natural gas exploitation.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1 to example 3
Examples 1-3 the compositions of the multi-effect additives provided are respectively shown in table 1, the preparation processes are basically the same except for the difference of the contents of the components, taking example 2 as an example, the multi-effect additive is prepared according to the following preparation processes:
(1) 100kg of diesel oil was charged into a reaction vessel, heated to 60 ℃ and then 30kg of ethylene-vinyl acetate copolymer (EVA160 pellets) was added thereto, and the mixture was stirred while heating until the EVA160 pellets were completely dissolved to obtain composition A.
(2) Adding 500kg of tap water into a stirring tank, adding 250kg of alkyl glycoside (APG0812) while stirring, stirring until the mixture is completely dissolved, and sequentially adding 20kg of tetrasodium iminodisuccinate and 100kg of potassium formate until the mixture is completely dissolved to obtain a composition B;
(3) cooling the composition A prepared in the first step to 20-40 ℃, adding the composition B prepared in the second step under the stirring state, and uniformly mixing to obtain a finished product (namely the multi-effect additive, about 1000 kg).
Table 1 multi-effect additive composition of examples 1-3
Application examples
The following tests 1-3 and comparative test 1 were carried out using the multi-effect additive of examples 1-3, methanol:
test 1: preparing a mixed solution of the multi-effect additive and methanol in the mass ratio of 1:2 in the embodiment 1, and marking as a multi-effect hydrate inhibitor 1;
test 2: preparing a mixed solution of the multi-effect additive and methanol in the mass ratio of 1:2 in the embodiment 2, and recording the mixed solution as a multi-effect hydrate inhibitor 2;
test 3: preparing a mixed solution of the multi-effect additive and methanol in the mass ratio of 1:2 in the embodiment 3, and marking as a multi-effect hydrate inhibitor 3;
comparative experiment 1: methanol was used as hydrate inhibitor.
The multi-effect hydrate inhibitor 1, the multi-effect hydrate inhibitor 2, the multi-effect hydrate inhibitor 3 and the methanol are respectively applied to the natural gas exploitation process of a Ksxx-H well in a Tarim oil field, the using time is 20 days, main indexes in the using process are detected, and the injection amount and the effect of the hydrate inhibitor in each test are shown in Table 2.
TABLE 2
And M is 1 mol/L.
As can be seen from table 2, in the process of natural gas exploitation, compared with the methanol of comparative experiment 1, the supercooling degree and the freezing delay time of the formation of the natural gas hydrate are both obviously improved by adopting the multi-effect hydrate inhibitor of experiments 1 to 3, which indicates that the experiments 1 to 3 can effectively inhibit the formation of the natural gas hydrate; meanwhile, compared with the comparative test 1, the tests 1 to 3 can also obviously inhibit the problems of paraffin deposition, pipeline corrosion and scaling; in addition, the injection amount of the multi-effect additives in the tests 1 to 3 is less than 40% of the dosage of the methanol in the comparative test 1, and the cost of the medicament is reduced by more than 30% as a whole.
Claims (10)
1. A multi-effect additive for natural gas exploitation is characterized by comprising the following components: 1-3 parts of plant chelating agent, 1-5 parts of ethylene-vinyl acetate copolymer, 15-40 parts of alkyl glycoside, 5-15 parts of formate, 5-25 parts of solvent oil and 12-73 parts of water.
2. The multi-effect additive of claim 1 wherein the phytochelators are one or a mixture of sodium gluconate, sodium glucoheptonate, and tetrasodium iminodisuccinate.
3. The multi-effect additive of claim 1 wherein the ethylene-vinyl acetate copolymer has a vinyl acetate structure content of 18-32%, a melt index of not less than 100, and a degree of disproportionation of 0.1-0.2.
4. The multi-effect additive according to claim 1 wherein the formate salt is sodium formate or potassium formate or a mixture of both; and/or the alkyl glycoside is one or a mixture of more of APG1214, APG0812 and APG 0810.
5. The multi-effect additive according to any one of claims 1 to 4 wherein the solvent oil is one or a mixture of kerosene, diesel oil, tar and benzene solvent.
6. The method for the preparation of the multi-effect additive of any one of claims 1 to 5, comprising:
dissolving ethylene-ethyl acetate copolymer in solvent oil to obtain a composition A;
dissolving alkyl glycoside, plant chelating agent and formate in water to obtain a composition B;
and mixing the composition A and the composition B to obtain the multi-effect additive.
7. A pleiotropic hydrate inhibitor for natural gas exploitation, characterized in that it comprises a hydrate thermodynamic inhibitor and a pleiotropic additive according to any one of claims 1 to 4.
8. The pleiotropic hydrate inhibitor of claim 7, wherein the thermodynamic hydrate inhibitor is an alcohol inhibitor.
Preferably, the alcohol inhibitor is one or a mixture of methanol, ethanol, ethylene glycol, diethylene glycol and triethylene glycol.
9. The pleiotropic hydrate inhibitor according to claim 7 or 8, characterized in that the mass of the pleiotropic additive is 5-80% of the mass of the thermodynamic hydrate inhibitor.
10. Use of the multi-effect additive of any one of claims 1-5 in natural gas extraction processes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010794992.5A CN114058344A (en) | 2020-08-10 | 2020-08-10 | Multi-effect additive for natural gas exploitation and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010794992.5A CN114058344A (en) | 2020-08-10 | 2020-08-10 | Multi-effect additive for natural gas exploitation and preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114058344A true CN114058344A (en) | 2022-02-18 |
Family
ID=80233010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010794992.5A Pending CN114058344A (en) | 2020-08-10 | 2020-08-10 | Multi-effect additive for natural gas exploitation and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114058344A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040110877A1 (en) * | 2002-12-06 | 2004-06-10 | Becker Harold L. | Suspension comprising multiple surface active agents for treating oilfield fluids and gases and a method of making and using the same |
| US20070054812A1 (en) * | 2005-09-05 | 2007-03-08 | Rafael Lugo | Method and thermodynamic inhibitors of gas hydrates in water-based fluids |
| CN104910887A (en) * | 2015-06-08 | 2015-09-16 | 成都鼎鸿石油技术有限公司 | Natural gas hydrate control agent |
| US20160108327A1 (en) * | 2014-10-17 | 2016-04-21 | M-I L.L.C. | Chemical inhibitors with sub-micron materials as additives for enhanced flow assurance |
| US20160289581A1 (en) * | 2015-04-01 | 2016-10-06 | Ecolab Usa Inc. | Fluorine-containing agents for enhancing hydrate inhibitors |
| US20160312103A1 (en) * | 2015-04-27 | 2016-10-27 | Nachurs Alpine Solutions, Corp. | Salt Solutions for Hydrate Plug Inhibition and Removal |
| CN106987241A (en) * | 2017-04-08 | 2017-07-28 | 王婷 | A kind of low dosage Compositional type hydrate inhibitor for natural gas |
| WO2019089043A1 (en) * | 2017-11-03 | 2019-05-09 | Baker Hughes, A Ge Company, Llc | Treatment methods using aqueous fluids containing oil-soluble treatment agents |
-
2020
- 2020-08-10 CN CN202010794992.5A patent/CN114058344A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040110877A1 (en) * | 2002-12-06 | 2004-06-10 | Becker Harold L. | Suspension comprising multiple surface active agents for treating oilfield fluids and gases and a method of making and using the same |
| US20070054812A1 (en) * | 2005-09-05 | 2007-03-08 | Rafael Lugo | Method and thermodynamic inhibitors of gas hydrates in water-based fluids |
| US20160108327A1 (en) * | 2014-10-17 | 2016-04-21 | M-I L.L.C. | Chemical inhibitors with sub-micron materials as additives for enhanced flow assurance |
| US20160289581A1 (en) * | 2015-04-01 | 2016-10-06 | Ecolab Usa Inc. | Fluorine-containing agents for enhancing hydrate inhibitors |
| US20160312103A1 (en) * | 2015-04-27 | 2016-10-27 | Nachurs Alpine Solutions, Corp. | Salt Solutions for Hydrate Plug Inhibition and Removal |
| CN104910887A (en) * | 2015-06-08 | 2015-09-16 | 成都鼎鸿石油技术有限公司 | Natural gas hydrate control agent |
| CN106987241A (en) * | 2017-04-08 | 2017-07-28 | 王婷 | A kind of low dosage Compositional type hydrate inhibitor for natural gas |
| WO2019089043A1 (en) * | 2017-11-03 | 2019-05-09 | Baker Hughes, A Ge Company, Llc | Treatment methods using aqueous fluids containing oil-soluble treatment agents |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109071729B (en) | Acryloyl group-based copolymers, terpolymers and use as hydrate inhibitors | |
| CN100556978C (en) | A kind of ionic liquid type hydrate inhibitor | |
| AU2011383248B2 (en) | Composition and method for reducing hydrate agglomeration | |
| CN106987241B (en) | A kind of low dosage Compositional type hydrate inhibitor for natural gas | |
| CN111196919B (en) | Mannich base type acidizing corrosion inhibitor and preparation method thereof | |
| AU2014329467A1 (en) | Amidoamine gas hydrate inhibitors | |
| WO2007054226A1 (en) | Use of pyroglutamic acid esters as gas hydrate inhibitors with improved biodegradability | |
| CN108707906A (en) | A kind of high temperature compound corrosion inhibitor and preparation method thereof suitable for mild steel | |
| US20160312103A1 (en) | Salt Solutions for Hydrate Plug Inhibition and Removal | |
| CN114058344A (en) | Multi-effect additive for natural gas exploitation and preparation method and application thereof | |
| CN103627378A (en) | Ionic hydrate inhibitor | |
| EP3317383A1 (en) | Hydrogen sulfide scavenging additive compositions, and medium comprising the same | |
| DE102005007287B4 (en) | Use of polyesters as gas hydrate inhibitors | |
| CN102220170B (en) | Corrosion inhibitor for hydrogenation unit and preparation method thereof | |
| CN102190750B (en) | Copolymer of styrene and N-vinyl pyrrolidone, and preparation method and application thereof | |
| CN111647395A (en) | Two-phase double-degradation oil well corrosion-resistant scale-resistant wax-control slow-release particles | |
| RU2601355C1 (en) | Composition for inhibiting formation of hydrates in hydrocarbon-containing raw material | |
| US4003856A (en) | Oil-soluble composition for removing iron sulfide and sludge from metal surfaces | |
| CN114106804B (en) | High-temperature-resistant esterification type composite scale inhibitor and preparation method thereof | |
| CN116083065A (en) | Low-dosage natural gas hydrate inhibitor and preparation method thereof | |
| CN105295880B (en) | Slow-release solid corrosion inhibitor and preparation method thereof | |
| CN117736180A (en) | Compound, preparation method thereof and corrosion inhibitor containing compound | |
| WO2001012677A1 (en) | Method of inhibiting vapor phase fouling in vinyl monomer systems | |
| CN109021950B (en) | Solid chelating acid for increasing injection of water injection well and preparation method thereof | |
| CN109153784B (en) | Succinimidyl copolymers and their use as hydrate inhibitors |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220218 |