CN113999661A - Energy-increasing blockage removing agent for improving productivity of thermal production thick oil well and preparation method and application thereof - Google Patents
Energy-increasing blockage removing agent for improving productivity of thermal production thick oil well and preparation method and application thereof Download PDFInfo
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- CN113999661A CN113999661A CN202010738209.3A CN202010738209A CN113999661A CN 113999661 A CN113999661 A CN 113999661A CN 202010738209 A CN202010738209 A CN 202010738209A CN 113999661 A CN113999661 A CN 113999661A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 142
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 69
- 239000003129 oil well Substances 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 28
- 239000002253 acid Substances 0.000 claims abstract description 62
- 238000000034 method Methods 0.000 claims abstract description 25
- 230000000903 blocking effect Effects 0.000 claims abstract description 23
- 230000008569 process Effects 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 51
- 238000005260 corrosion Methods 0.000 claims description 47
- 230000007797 corrosion Effects 0.000 claims description 46
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 36
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 32
- 230000002579 anti-swelling effect Effects 0.000 claims description 30
- -1 iron ion Chemical class 0.000 claims description 29
- 239000004927 clay Substances 0.000 claims description 26
- 239000003381 stabilizer Substances 0.000 claims description 22
- 150000007524 organic acids Chemical class 0.000 claims description 21
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 claims description 18
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 16
- 239000004202 carbamide Substances 0.000 claims description 16
- 235000013877 carbamide Nutrition 0.000 claims description 16
- 239000006260 foam Substances 0.000 claims description 16
- 239000003112 inhibitor Substances 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 15
- 150000003863 ammonium salts Chemical class 0.000 claims description 13
- 239000011734 sodium Substances 0.000 claims description 13
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 12
- 239000002270 dispersing agent Substances 0.000 claims description 12
- 229910052708 sodium Inorganic materials 0.000 claims description 12
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 claims description 11
- 239000004088 foaming agent Substances 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 11
- 229910052742 iron Inorganic materials 0.000 claims description 11
- KQTIIICEAUMSDG-UHFFFAOYSA-N tricarballylic acid Chemical compound OC(=O)CC(C(O)=O)CC(O)=O KQTIIICEAUMSDG-UHFFFAOYSA-N 0.000 claims description 10
- 235000010288 sodium nitrite Nutrition 0.000 claims description 9
- BDLXTDLGTWNUFM-UHFFFAOYSA-N 2-[(2-methylpropan-2-yl)oxy]ethanol Chemical compound CC(C)(C)OCCO BDLXTDLGTWNUFM-UHFFFAOYSA-N 0.000 claims description 8
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 claims description 8
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 8
- 235000019270 ammonium chloride Nutrition 0.000 claims description 8
- 239000000839 emulsion Substances 0.000 claims description 8
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 8
- 239000004711 α-olefin Substances 0.000 claims description 8
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 7
- 229920000570 polyether Polymers 0.000 claims description 7
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 claims description 7
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 6
- 239000012964 benzotriazole Substances 0.000 claims description 6
- 238000009472 formulation Methods 0.000 claims description 5
- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical compound C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 claims description 4
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 claims description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 4
- 229920001296 polysiloxane Polymers 0.000 claims description 4
- KWYJDIUEHHCHCZ-UHFFFAOYSA-N 3-[2-[bis(2-carboxyethyl)amino]ethyl-(2-carboxyethyl)amino]propanoic acid Chemical compound OC(=O)CCN(CCC(O)=O)CCN(CCC(O)=O)CCC(O)=O KWYJDIUEHHCHCZ-UHFFFAOYSA-N 0.000 claims description 2
- MIMUSZHMZBJBPO-UHFFFAOYSA-N 6-methoxy-8-nitroquinoline Chemical compound N1=CC=CC2=CC(OC)=CC([N+]([O-])=O)=C21 MIMUSZHMZBJBPO-UHFFFAOYSA-N 0.000 claims description 2
- 239000004604 Blowing Agent Substances 0.000 claims description 2
- 229920002125 Sokalan® Polymers 0.000 claims description 2
- 239000004584 polyacrylic acid Substances 0.000 claims description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims 2
- 235000013162 Cocos nucifera Nutrition 0.000 claims 1
- 244000060011 Cocos nucifera Species 0.000 claims 1
- 125000001153 fluoro group Chemical class F* 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 10
- 230000009467 reduction Effects 0.000 abstract description 9
- 239000003921 oil Substances 0.000 description 32
- 235000019198 oils Nutrition 0.000 description 31
- 239000011435 rock Substances 0.000 description 13
- 239000007924 injection Substances 0.000 description 12
- 238000002347 injection Methods 0.000 description 12
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- 238000012360 testing method Methods 0.000 description 11
- 239000000440 bentonite Substances 0.000 description 9
- 229910000278 bentonite Inorganic materials 0.000 description 8
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 8
- 239000000295 fuel oil Substances 0.000 description 8
- 239000011521 glass Substances 0.000 description 8
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- 229910000831 Steel Inorganic materials 0.000 description 7
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- 239000010959 steel Substances 0.000 description 7
- 238000001035 drying Methods 0.000 description 6
- 238000005303 weighing Methods 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
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- 239000011148 porous material Substances 0.000 description 4
- 230000002265 prevention Effects 0.000 description 4
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000010793 Steam injection (oil industry) Methods 0.000 description 3
- 239000002734 clay mineral Substances 0.000 description 3
- 239000000084 colloidal system Substances 0.000 description 3
- 235000019441 ethanol Nutrition 0.000 description 3
- 238000005187 foaming Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 229920002050 silicone resin Polymers 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 235000019864 coconut oil Nutrition 0.000 description 2
- 239000003240 coconut oil Substances 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 1
- IGFHQQFPSIBGKE-UHFFFAOYSA-N Nonylphenol Natural products CCCCCCCCCC1=CC=C(O)C=C1 IGFHQQFPSIBGKE-UHFFFAOYSA-N 0.000 description 1
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000005903 acid hydrolysis reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002738 chelating agent Substances 0.000 description 1
- 239000012295 chemical reaction liquid Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 150000004673 fluoride salts Chemical class 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 229910052622 kaolinite Inorganic materials 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- 150000002826 nitrites Chemical class 0.000 description 1
- SNQQPOLDUKLAAF-UHFFFAOYSA-N nonylphenol Chemical compound CCCCCCCCCC1=CC=CC=C1O SNQQPOLDUKLAAF-UHFFFAOYSA-N 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000056 polyoxyethylene ether Polymers 0.000 description 1
- 229940051841 polyoxyethylene ether Drugs 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 235000019333 sodium laurylsulphate Nutrition 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000004562 water dispersible granule Substances 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
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention provides an energy increasing and blocking removing agent for improving the productivity of a thermal production thick oil well, a preparation method and application thereof. In the field construction process, the energizing preparation and the acid preparation are injected in a segmented mode in sequence, and energizing and blockage removal of the thermal production thickened oil well are achieved. The blocking remover system is suitable for the energy increasing and blocking removing of a thin thick oil layer, which has the advantages of quick yield reduction in the middle and later periods of a thermal production thick oil well, short period production, simple construction process, less consumption and obvious effect, and the yield of the thick oil well is improved.
Description
Technical Field
The invention relates to the field of petroleum, in particular to an energy-increasing blocking remover for improving the productivity of a thermal recovery thick oil well, a preparation method and application thereof.
Background
The main factors influencing the stable production of the heavy oil well are as follows as the thermal recovery of the heavy oil well enters the middle and later stages: 1. heavy components such as colloid, asphalt and the like in the thickened oil are retained and adsorbed in a near-wellbore area to cause accumulation and precipitation, so that the seepage capability of the stratum is reduced; 2. after steam enters a stratum, the steam is contacted with clay minerals, so that kaolinite in the clay minerals is easy to montmorillonite at high temperature to petrifaction, the clay is caused to expand, the reservoir cementation is looser, and fine particles are easy to cut away from a matrix and participate in migration, so that the throat is blocked; 3. when the content of the stratum clay is high, the steam cooling liquid can expand the reservoir clay minerals to reduce the stratum seepage, in addition, fine particles attached to pores fall off and migrate along with the fluid to block a throat or are accumulated in large pores, so that the original large pore throat is reduced, small pores disappear, the stratum is finally blocked, and sand production is caused when the serious condition is met; 4. the steam or hot water is emulsified with the crude oil in the stratum to form emulsion, which causes the pressure rise during steam injection and liquid lock during oil extraction to affect the production of oil wells. In the middle and later periods of exploitation of the heavy oil thermal production well, stratum depletion is serious, energy is reduced, problems that a high-permeability layer is repeatedly acidified, flowback time after acidification is long, fluidity of heavy oil cannot be improved and the like easily occur in the acidification process, and therefore, the research on the acidification blocking remover in the middle and later periods of the heavy oil thermal production well is urgent.
CN103881698B discloses an active hot gas acid and a preparation method and application thereof. The method is prepared by sodium dodecyl sulfate, sodium nitrite, ammonium chloride, oxalic acid and nonylphenol polyoxyethylene ether according to a certain proportion, belongs to the field of simple thermochemical reaction heat utilization, is suitable for removing oil layer blockage at the later period of thick oil huff and puff, improves huff and puff effect, does not change the permeability of a target layer of a huff and puff well, and cannot use low-permeability layer thick oil.
CN102775980B discloses an acidification blocking remover suitable for complex lithology. The method is prepared by adopting main acid, organic acid and additive according to a certain proportion, is suitable for plugging removal of water injection wells with larger difference of lithology and physical property of oil fields, and does not relate to production wells.
CN104612650A discloses an oxidative complex acid deep acidizing plug removal method for acidizing plug removal of a water injection well. The method comprises the steps of sequentially injecting active water, acidic blockage removing liquid and main component acid liquid into a water injection well to be blocked, and then injecting the oxidized blockage removing agent liquid and the acidic blockage removing liquid into the water injection well to be blocked simultaneously by using two cement trucks to remove the blockage. The method is suitable for plugging a common water injection well, and does not relate to a production well.
CN108517204A discloses a three-in-one acidification blocking remover for oil well blocking removal and an application method thereof. The blocking remover is prepared from polybasic organic acid, a precipitation inhibitor, an iron ion chelating agent, an anti-swelling agent, an acid slag preventing agent, a corrosion inhibitor, hydrogen fluoride, a demulsifier and a waterproof locking agent. The method is suitable for inorganic scale and organic scale blockage of common oil wells, and has little blockage effect caused by factors such as asphaltene and colloid of heavy oil wells.
CN103541712B discloses a method for removing blockage of a three-stacked oil reservoir by nitrogen foam acidification. The method adopts the combined action of nitrogen, foaming agent and acid liquor to improve the penetration depth of the acid liquor and realize deep acidification. The method is suitable for general water injection wells, and does not relate to blockage removal of thick oil wells.
After the thick oil thermal recovery thick oil well enters the middle and later stages, the stratum is seriously lacked, the energy is lower, and the production of the thick oil well is influenced after a production layer is blocked. The acidification blocking remover used in the prior art has better effect on water injection wells and common oil wells and poor blocking effect on thick oil wells. Therefore, it is urgently needed to find a blocking remover capable of better improving the blockage of the heavy oil well.
Disclosure of Invention
In order to solve the problems of repeated acidification of a high-permeability layer, short action distance, poor flowback effect, failure in improving the flowability of thick oil and the like of the conventional thick oil well, the invention aims to provide an energy-increasing blocking remover for improving the productivity of a thermal production thick oil well, wherein the energy-increasing blocking remover can quickly disperse heavy components of thick oil, improve the formation energy, temporarily block the high-permeability layer, acidify the deep part of the low-permeability layer and improve the flowability of the thick oil.
The invention also aims to provide a preparation method of the energizing deblocking agent.
It is a further object of the present invention to provide the use of said energizing deblocking agent in the treatment of oil well plugging.
In order to achieve the above purpose, in one aspect, the invention provides an energy increasing and deblocking agent for improving the productivity of a thermal production thick oil well, the energy increasing and deblocking agent comprises an energy increasing agent and an acid agent, wherein the energy increasing agent comprises, by mass, 12-18% of nitrite, 5-8% of carbamide, 10-16% of ammonium salt, 0.1-0.2% of a dispersing agent, 0.02-0.04% of a foaming agent, 0.02-0.06% of a foam stabilizer, 0.1-0.3% of a polybasic organic acid, and the balance of water; the acid preparation comprises, by mass, 6-12% of a polybasic organic acid, 8-10% of villiaumite, 4-6% of fluoborate, 0.4-0.7% of a corrosion inhibitor, 0.5-1.0% of a clay anti-swelling agent, 0.2-0.6% of an iron ion stabilizer and the balance of water.
The invention adopts the combined action of the energizing preparation (dispersing agent, foaming agent, foam stabilizer and the like) and the acid preparation, after entering the stratum, the energizing preparation reacts in the stratum to generate heat and a large amount of gas, and the generated heat improves the dispersion performance of the dispersing agent on colloid and asphaltene in a near-wellbore area while improving the fluidity of thick oil; meanwhile, the gas generating agent decomposes a large amount of gas at high temperature, the gas generates a large amount of bubbles under the action of the foaming agent and the foam stabilizer, the temporary plugging effect is realized on a high-permeability oil layer while the formation energy is supplemented, the subsequently entering main body acid liquid is forced to enter a low-permeability layer, and the permeability of the low-permeability layer is improved. When the acidizing is finished and the flowback is finished, the high-pressure gas in the stratum is beneficial to flowing back, and the flowback efficiency is improved. The invention improves the fluidity of the thick oil and improves the oil production capacity of the thick oil well while realizing the acidification and the blockage removal of the thick oil well.
According to some embodiments of the invention, the energizer formulation comprises energizer formulation a and energizer formulation B; wherein the energizer A comprises nitrite, carbamide, a foaming agent, a foam stabilizer and a proper amount of water; the energizer preparation B comprises an ammonium salt, a dispersant, a polybasic organic acid and a proper amount of water; the energy increasing preparation A and the energy increasing preparation B jointly form 100% of the energy increasing preparation component by mass.
According to some embodiments of the invention, the energizer preparation a and the energizer preparation B are prepared by a method comprising the following steps: preparation of energizer preparation A: at room temperature, sequentially adding water, nitrite, carbamide, foaming agent and foam stabilizer into a container, and uniformly stirring to obtain the material; preparation of energizer preparation B: sequentially adding water, ammonium salt, a dispersing agent and polybasic organic acid into a container at room temperature, and uniformly stirring to obtain the water-soluble organic acid-water dispersible granule; the energy-increasing preparation A and the energy-increasing preparation B jointly form 100% of the energy-increasing preparation components by mass, and the nitrite, the carbamide and the ammonium salt need to be prepared separately.
According to some embodiments of the invention, the acid formulation is prepared by a process comprising the steps of: sequentially adding water, polybasic organic acid, villiaumite, fluoborate, corrosion inhibitor, clay anti-swelling agent and iron ion stabilizer into a corrosion-resistant container at room temperature, and uniformly stirring to obtain the anti-swelling agent.
According to some embodiments of the invention, the nitrite salt comprises sodium nitrite.
According to some embodiments of the invention, the ammonium salt comprises ammonium chloride.
According to some embodiments of the invention, the dispersant is selected from one or a combination of two or more of ethylene glycol tertiary-butyl ether, ethylene glycol monobutyl ether and a glycol ether, preferably one or two of ethylene glycol tertiary-butyl ether and ethylene glycol monobutyl ether.
According to some embodiments of the invention, the blowing agent is selected from one or a combination of two or more of sodium alpha-olefin sulfonate, alcohol ether carboxylate AEC-9Na (yindokungxing chemical limited) and phenol ether carboxylate NEC-4Na (yindokungxing chemical limited), preferably one or two of sodium alpha-olefin sulfonate and alcohol ether carboxylate AEC-9 Na.
According to some embodiments of the invention, the foam stabilizer is selected from one or both of silicone polyether emulsion and coconut oil fatty acid diethanolamide.
According to some embodiments of the present invention, the polybasic organic acid is selected from one or a combination of two or more of citric acid, polyacrylic acid and tricarballylic acid, preferably one or two of citric acid and tricarballylic acid.
According to some embodiments of the invention, the fluoride salt is selected from one or both of ammonium fluoride and ammonium bifluoride, preferably ammonium fluoride.
According to some embodiments of the invention, the fluoroborate is selected from one or both of sodium fluoroborate and ammonium fluoroborate, preferably sodium fluoroborate.
According to some embodiments of the present invention, the corrosion inhibitor is selected from one or a combination of more than two of benzotriazole, 2-mercaptobenzothiazole and imidazoline quaternary ammonium salt, preferably one or two of benzotriazole and imidazoline quaternary ammonium salt.
According to some embodiments of the invention, the clay anti-swelling agent is selected from one or both of the group consisting of clay anti-swelling agent HJZ-100 and clay anti-swelling agent HJZ-300.
According to some embodiments of the invention, the iron ion stabilizer is selected from one or both of ethylenediaminetetraacetic acid and ethylenediaminetetrapropionic acid, preferably ethylenediaminetetraacetic acid.
On the other hand, the invention also provides a preparation method of the energy-increasing blocking remover, which comprises the following steps: preparation of energizer preparation A: at room temperature, sequentially adding water, nitrite, carbamide, foaming agent and foam stabilizer into a container, and uniformly stirring; preparation of energizer preparation B: at room temperature, sequentially adding water, ammonium salt, a dispersing agent and polybasic organic acid into a container, and uniformly stirring; preparation of acid preparation: sequentially adding water, polybasic organic acid, villiaumite, fluoborate, corrosion inhibitor, clay anti-swelling agent and iron ion stabilizer into a corrosion-resistant container at room temperature, and uniformly stirring to obtain the anti-swelling agent; wherein the energizer preparation A and the energizer preparation B jointly constitute 100 percent by mass of the energizer preparation components, and the energizer preparation A, the energizer preparation B and the acid preparation are separately present before application.
According to some embodiments of the present invention, the method for preparing the energy-increasing deblocking agent comprises the following steps: (1) preparation of energizer preparation A: at room temperature, 239g of tap water is taken in a glass beaker, 180g of sodium nitrite, 80g of carbamide, 0.4g of alpha-olefin sodium sulfonate and 0.6g of silicone resin polyether emulsion are sequentially added, and a stirrer is used for stirring uniformly; (2) preparation of energizer preparation B: at room temperature, 336g of tap water is taken from a glass beaker, 160g of ammonium chloride, 2g of ethylene glycol tertiary butyl ether and 2g of citric acid are sequentially added, and the mixture is uniformly stirred by a stirrer; (3) preparation of acid preparation: at room temperature, 697g of tap water is taken from a corrosion-resistant container, 120g of citric acid, 100g of ammonium fluoride, 60g of sodium fluoborate, 7g of benzotriazole, 10g of clay anti-swelling agent HJZ-300 and 6g of ethylene diamine tetraacetic acid are sequentially added, and the mixture is uniformly stirred.
In still another aspect, the invention also provides the use of the energy-increasing and blocking-removing agent in treating oil well blockage, preferably in treating thick oil well blockage.
According to some embodiments of the invention, the above application comprises the steps of: injecting an energy increasing preparation into the well, and then injecting an acid preparation, thereby completing the operation; preferably, the operation is completed by injecting the energizer agent A, then injecting water, further injecting the energizer agent B and finally injecting the acid preparation into the well.
According to some embodiments of the invention, the above application comprises the steps of: (1) preparing an energy-enhancing preparation: the energy-increasing preparation comprises the following components, by mass, 100% of the energy-increasing preparation is divided into an energy-increasing preparation A and an energy-increasing preparation B, and the preparation method of the energy-increasing preparation A and the energy-increasing preparation B comprises the following steps: preparation of energizer preparation A: at room temperature, sequentially adding water, nitrite, carbamide, foaming agent and foam stabilizer into a container, and uniformly stirring; preparation of energizer preparation B: at room temperature, sequentially adding water, ammonium salt, a dispersing agent and polybasic organic acid into a container, and uniformly stirring; (2) preparation of acid preparation: at room temperature, sequentially adding water, polybasic organic acid, villiaumite, fluoborate, corrosion inhibitor, clay anti-swelling agent and iron ion stabilizer into a corrosion-resistant container, and uniformly stirring; (3) the construction steps are as follows: injecting an energy-increasing preparation A into a well, then injecting water (the part of water belongs to additional added water and does not belong to the components of the energy-increasing preparation A or the energy-increasing preparation B, the part of water belongs to an isolation slug, so that the preparation A and the preparation B are contacted in a stratum and are prevented from being contacted in a shaft), further injecting the energy-increasing preparation B, and finally injecting an acid preparation, wherein the volume ratio of the energy-increasing preparation A, the water, the energy-increasing preparation B and the acid preparation injected in sequence is (0.5-1.5): (0.2-0.5): (0.5-1.5): (1-2).
The invention has the beneficial effects that:
the invention prepares the energy-increasing preparation (nitrite, carbamide and ammonium salt need to be prepared separately) and the acid preparation according to certain mass concentration, and the energy-increasing preparation and the acid preparation are respectively stirred evenly to prepare the energy-increasing agent. In the field construction process, the energizing preparation and the acid preparation are injected in a segmented mode in sequence, and energizing and blockage removal of the thermal production thickened oil well are achieved. The blocking remover system is suitable for the energy increasing and blocking removing of a thin thick oil layer, which has the advantages of quick yield reduction in the middle and later periods of a thermal production thick oil well, short period production, simple construction process, less consumption and obvious effect, and the yield of the thick oil well is improved.
Detailed Description
The following detailed description of the present invention/embodiments will be provided for the purpose of better understanding the technical features, objects and advantages of the present invention, but should not be construed as limiting the operable scope of the present invention.
Example 1
The embodiment provides a specific preparation method of an energizing deblocking agent, which comprises the following specific steps:
1. at room temperature, 239g of tap water is taken in a glass beaker, 180g of sodium nitrite, 80g of carbamide, 0.4g of alpha-olefin sodium sulfonate and 0.6g of silicone resin polyether emulsion are sequentially added, and the mixture is uniformly stirred by a stirrer to prepare an energizer preparation A;
2. at room temperature, 335g of tap water is taken from a glass beaker, 160g of ammonium chloride, 2g of ethylene glycol tertiary butyl ether and 3g of citric acid are sequentially added, and the mixture is uniformly stirred by a stirrer to prepare an energizer preparation B;
3. at room temperature, 697g of tap water is taken from a corrosion-resistant container, 120g of citric acid, 100g of ammonium fluoride, 60g of sodium fluoborate, 7g of benzotriazole, 10g of clay anti-swelling agent HJZ-300 and 6g of ethylene diamine tetraacetic acid are sequentially added, and the mixture is uniformly stirred to prepare the acid preparation.
4. A2000 mL conical flask was taken, energizer A and energizer B, both 200g in mass, were poured in sequence, the flask was sealed with a rubber stopper with a thermometer, the maximum temperature of the solution was observed and the time taken to reach the maximum temperature was recorded.
Through experiments, the energy increasing preparation has the highest temperature of 100 ℃, the time of reaching 100 ℃ is 43 minutes, the foaming amount reaches 1450mL, and the half-water-separating period of foam is 157 s; the viscosity reduction rate of the thick oil is 95.3 percent, the corrosion rate of the acid preparation to the base rock is 25.4 percent, the corrosion inhibition rate to the P110 steel sheet is 93.52 percent, and the expansion prevention rate is 88.5 percent.
The method for testing the viscosity reduction rate of the thickened oil, the corrosion rate of the acid preparation to the matrix rock, the corrosion inhibition rate of the acid preparation to the steel sheet and the anti-swelling rate comprises the following steps:
1. viscosity reduction rate of thick oil
The viscosity reduction rate of the energy increasing system on the thickened oil is tested according to the standard of Q/SY 118-: mixing the thickened oil and the blocking remover according to the mass ratio of 7:3, stirring at the constant temperature of 50 ℃ until the thickened oil is uniformly dispersed in the blocking remover, and measuring the viscosity of the thickened oil at the moment by using a Brookfield viscometer. The viscosity reduction rate is (viscosity of thick oil without adding deblocking agent-viscosity of thick oil with adding deblocking agent)/viscosity of thick oil without adding deblocking agent x 100%.
2. Corrosion rate of acid preparation to base rock
The corrosion rate of the acid preparation on the base rock is obtained by measuring the corrosion effect of the acid preparation on the natural core rock powder after the acid preparation is added into an energy increasing system under the condition of stratum temperature, and the acid preparation is tested according to the standard of Q/SY 5358-2010 reservoir sensitivity flow experiment evaluation method, and the specific test method comprises the following steps: (1) grinding the oil-washed rock sample (or fragments), sieving with a standard sieve with 0.175mm aperture, and drying the sieved substance at 80 deg.C to constant weight; (2) weighing two rock samples on an electronic balance according to the solid-liquid ratio of 1.5g rock sample/10 mL acid liquid, wherein the volume of the acid liquid is not more than 30mL, placing the two rock samples in a 50mL plastic centrifuge tube, and weighing the masses of the filter paper and the empty weighing bottle at the same time; (3) adding acid liquor into the centrifuge tubes respectively, and covering to prevent the reaction liquid from volatilizing; (4) putting the centrifugal tube into a constant-temperature water bath for 1h, and then putting the centrifugal tube into a centrifuge to centrifuge for 5-10min at the speed of 3000 r/min; (5) washing the separated filter residue with 0.1% NaOH solution to be nearly neutral, and washing with distilled water to be neutral; (6) and filtering the reactant by using weighed filter paper, putting the filter residue and the filter paper together in a weighed weighing bottle, drying at 80 ℃ to constant weight, and calculating the mass of the filter residue. The corrosion rate is (mass of rock sample before reaction-mass of filter residue after reaction)/mass of rock sample before reaction x 100%.
3. Corrosion inhibition rate of acid preparation on steel sheet
The corrosion inhibition rate of the acid preparation on the steel sheet is evaluated by measuring the corrosion effect of the acid preparation on the steel sheet after the acid preparation is added under the condition of stratum temperature, and the corrosion inhibition rate is tested according to the standard of SY/T5405-2019 corrosion inhibitor performance test method for acidification and evaluation index, and the specific test method comprises the following steps: (1) taking the prepared test piece, measuring the size of the test piece by using a vernier caliper, and tying a plastic wire on the test piece hole; (2) acid used according to 20cm per square centimeter of test piece surface area3Pouring the prepared acid preparation into a reaction container, putting the reaction container into a constant-temperature water bath, and opening the constant-temperature water bath to reach the specified temperature; (3) hanging the test piece, namely putting the three test pieces into acid liquor without or with corrosion inhibitor respectively, ensuring that the surface of the test piece is completely contacted with acid hydrolysis, and recording the reaction starting time; (4) when the reaction is carried out for a preset time, the power supply is cut off, the test piece is taken out, and the corrosion condition is observed; (5) immediately cleaning the test piece with water, brushing with a soft brush, cutting off plastic wires, finally cleaning with absolute ethyl alcohol and acetone solution, and placing on filter paper; (6) drying the test piece with cold air, and placing in a dryerAfter drying for 20 minutes, it was weighed to the nearest 0.001 g. And (3) calculating the corrosion rate: (106X coupon corrosion amount)/(coupon surface area x reaction time); calculating the corrosion inhibition rate: (corrosion rate without corrosion inhibitor-corrosion rate with corrosion inhibitor)/corrosion rate without corrosion inhibitor x 100%.
4. Expansion prevention rate
The anti-swelling rate of the clay anti-swelling agent in the acid preparation to the clay is evaluated by measuring the stabilizing effect of the clay after the acid preparation is added under the condition of formation temperature, and the evaluation is carried out according to the standard of SY/T5971-2016 (Performance evaluation method for Clay stabilizer for water injection), and the specific test method is as follows: (1) taking the ground bentonite, putting the ground bentonite into a drying oven, drying the bentonite for 6 hours at the temperature of 105 +/-1 ℃, cooling the bentonite to the room temperature in a dryer, and storing the bentonite in a wide-mouth bottle for later use; (2) weighing 0.50g of bentonite powder, accurately weighing to 0.01g, placing into a 10mL centrifuge tube, adding 10mL of prepared clay anti-swelling agent solution, shaking thoroughly, standing at room temperature for 2h, placing into a centrifuge, centrifuging at 1500r/min for 15min, reading out the volume V of the swelled bentonite1(ii) a (3) The above operation was repeated, 10mL of water was used in place of the anti-swelling agent solution, and the swelling volume V of bentonite in water was measured2(ii) a (4) The above operation was repeated, 10mL of kerosene was used in place of the anti-swelling agent solution, and the swelling volume V of bentonite in water was measured0. And (3) calculating the anti-swelling rate: (V)2-V1)/(V2-V0)×100％。
Example 2
The embodiment provides a specific preparation method of an energizing deblocking agent, which comprises the following specific steps: 1. 329.6g of tap water is taken from a glass beaker at room temperature, 120g of sodium nitrite, 50g of carbamide, 0.2g of alpha-olefin sodium sulfonate and 0.2g of silicone resin polyether emulsion are sequentially added, and the mixture is stirred uniformly by a stirrer to prepare an energizer preparation A;
2. at room temperature, 397g of tap water is taken out of a glass beaker, 100g of ammonium chloride, 1g of ethylene glycol tertiary butyl ether and 2g of citric acid are sequentially added, and the mixture is uniformly stirred by a stirrer to prepare an energizer preparation B;
3. 809g of tap water is taken in a corrosion-resistant container at room temperature, 60g of citric acid, 80g of ammonium fluoride, 40g of sodium fluoborate, 4g of benzotriazole, 5g of clay anti-swelling agent HJZ-300 and 2g of ethylene diamine tetraacetic acid are sequentially added, and the mixture is uniformly stirred to prepare the acid preparation.
4. And (3) taking a 2000mL conical flask, sequentially pouring the energizer preparation A and the energizer preparation B with the mass of 200g, sealing the conical flask by using a rubber stopper with a thermometer, and observing the highest temperature of the solution and the time for reaching the highest temperature.
Through experiments, the energy increasing preparation has the highest temperature of 75 ℃, the time of reaching 75 ℃ is 63 minutes, the foaming amount reaches 973mL, and the half-water-separating period of foam is 112 s; the viscosity reduction rate of the thick oil is 81.3 percent, the corrosion rate of the acid preparation to the base rock is 18.7 percent, the corrosion inhibition rate to the P110 steel sheet is 87.43 percent, and the expansion prevention rate is 80.5 percent.
Example 3
The embodiment provides a specific preparation method of an energizing deblocking agent, which comprises the following specific steps:
1. at room temperature, 249.3g of tap water is taken from a glass beaker, 180g of sodium nitrite, 70g of carbamide, 0.3g of alcohol ether carboxylate AEC-9Na and 0.4g of coconut oil fatty acid diethanolamide are sequentially added, and the materials are uniformly stirred by a stirrer to prepare an energizer A;
2. 356.5g of tap water is taken from a glass beaker at room temperature, 140g of ammonium chloride, 1.5g of ethylene glycol monobutyl ether and 2g of citric acid are sequentially added, and the mixture is uniformly stirred by a stirrer to prepare an energizer preparation B;
3. 744g of tap water is taken out from a corrosion-resistant container at room temperature, 100g of polybasic organic acid (the molar ratio of citric acid to tricarballylic acid is 1:1), 90g of ammonium fluoride, 50g of sodium fluoroborate, 5g of imidazoline quaternary ammonium salt, 7g of clay anti-swelling agent HJZ-100 and 4g of ethylene diamine tetraacetic acid are sequentially added, and the mixture is uniformly stirred to prepare the acid preparation.
4. And (3) taking a 2000mL conical flask, sequentially pouring the energizer preparation A and the energizer preparation B with the mass of 200g, sealing the conical flask by using a rubber stopper with a thermometer, and observing the highest temperature of the solution and the time taken for reaching the highest temperature.
Through experiments, the energy-increasing preparation has the highest temperature of 86 ℃, the time of reaching 86 ℃ is 51 minutes, the foaming amount reaches 1235mL, and the half-water-separating period of foam is 126 s; the viscosity reduction rate of the thick oil is 87.3 percent, the corrosion rate of the acid preparation to the base rock is 22.7 percent, the corrosion inhibition rate to the P110 steel sheet is 90.14 percent, and the expansion prevention rate is 84.5 percent.
Example 4
The embodiment provides a method for treating oil well blockage by using an energizing blocking remover, which comprises the following steps:
the field construction of 38-30 wells in a cold-well pit is explained, the steam huff-puff exploitation of the well enters the 5 th round, the water content is higher than 92.4 percent, the viscosity of crude oil is 52587mPa & s, the steam injection pressure is 10MPa in the steam injection process, and the liquid production amount is 21.4m from the beginning in the production process3Down to 8.7m3The oil production is reduced to 1.2t from the initial 6.7t, and the stratum clay content is 5.3 percent according to the stratum small-layer data, and the heterogeneity is strong; and (4) taking oil well output for analysis, wherein inorganic scale and organic scale exist in a near wellbore area, and heavy oil components are accumulated around a wellbore.
Indoor research and analysis show that the blockage removal focuses on blockage removal of heavy components of thick oil around a shaft and improvement of permeability of a low permeability layer, and the energy-increasing blockage removal system used in the construction comprises the following formula: the energizer preparation comprises the following components in percentage by mass: 18% of sodium nitrite, 15% of ammonium salt, 8% of carbamide, 0.2% of ethylene glycol tertiary butyl ether, 0.04% of alpha-olefin sodium sulfonate and 0.04% of silicone polyether emulsion; the acid preparation comprises the following components in percentage by mass: 12% of polybasic organic acid (the molar ratio of citric acid to tricarballylic acid is 1:1), 8% of ammonium fluoride, 6% of sodium fluoborate, 0.6% of imidazoline quaternary ammonium salt, 1.0% of clay anti-swelling agent HJZ-300, 0.4% of iron ion stable ethylenediaminetetraacetic acid and the balance of water.
The well is constructed in 2019 in 5 months, and an energy increasing preparation A (sodium nitrite, carbamide, alpha-olefin sodium sulfonate and silicone polyether emulsion) is 10m in the construction process3Energizer B (ammonium chloride, ethylene glycol tert-butyl ether, host acid) 10m3(ii) a Host acid 36m3。
The construction steps are as follows: firstly, the energizer A is injected, and then the clear water slug is injected for 3m3Then adding energy-increasing preparation B, and finally adding acid preparation to replace clean water by 15m3。
The construction phenomenon is as follows: the initial injection pressure is 10.2MPa, after the injection of the energizer B is finished, the pressure is gradually increased to 15.3MPa (the energizer reacts to release gas and heat, so that the formation energy is increased, the subsequent injection acid preparation is forced to enter hypotonic layer acidification), the pressure is reduced to 13.7MPa along with the continuous injection of the acid preparation, and the pressure is reduced to 11.5MPa when the replacement of clear water is finished.
After the well is subjected to energy increasing and blockage removing construction, the well is stewed for 24 hours, the well is opened, the energy is strong in flowback, oil is seen after 2 days, and the liquid production quantity is increased to 25.7m3Oil yield 7.8m3The effect is obvious. By the end of 6 months in 2020, the production is accumulated for 416 days (321 days in the previous period), the measures are continuously effective, and the production period is effectively prolonged.
Claims (17)
1. The energy-increasing and blocking-removing agent for improving the productivity of the thermal production thick oil well is characterized by comprising an energy-increasing preparation and an acid preparation, wherein the energy-increasing preparation comprises 12-18% of nitrite, 5-8% of carbamide, 10-16% of ammonium salt, 0.1-0.2% of dispersing agent, 0.02-0.04% of foaming agent, 0.02-0.06% of foam stabilizer, 0.1-0.3% of polybasic organic acid and the balance of water in percentage by mass;
the acid preparation comprises, by mass, 6-12% of a polybasic organic acid, 8-10% of villiaumite, 4-6% of fluoborate, 0.4-0.7% of a corrosion inhibitor, 0.5-1.0% of a clay anti-swelling agent, 0.2-0.6% of an iron ion stabilizer and the balance of water.
2. The energizing deblocking agent according to claim 1, wherein the energizing agent comprises energizing agent A and energizing agent B;
wherein the energizer A comprises nitrite, carbamide, a foaming agent, a foam stabilizer and a proper amount of water;
the energizer preparation B comprises an ammonium salt, a dispersant, a polybasic organic acid and a proper amount of water;
the energizer preparation A and the energizer preparation B jointly form 100 percent of the energizer preparation component by mass.
3. The energizing deblocking agent of any one of claims 1-2, wherein said acid formulation is prepared by a process comprising the steps of:
sequentially adding water, polybasic organic acid, villiaumite, fluoborate, corrosion inhibitor, clay anti-swelling agent and iron ion stabilizer into a corrosion-resistant container at room temperature, and uniformly stirring to obtain the anti-swelling agent.
4. The energized deblocking agent of any one of claims 1-3, wherein the nitrite comprises sodium nitrite.
5. The energized plugging agent of claim 1, wherein said ammonium salt comprises ammonium chloride.
6. The energy-increasing deblocking agent according to claim 1, wherein the dispersing agent is selected from the group consisting of ethylene glycol tertiary butyl ether, ethylene glycol monobutyl ether, and ethylene glycol ethers, or a combination of two or more thereof.
7. The energy-increasing deblocking agent according to claim 1, wherein the blowing agent is selected from the group consisting of sodium alpha-olefin sulfonate, alcohol ether carboxylate AEC-9Na, and phenol ether carboxylate NEC-4Na, in combination or in combination.
8. The energy-increasing and blocking-removing agent as claimed in claim 1, wherein the foam stabilizer is selected from one or two of silicone polyether emulsion and coconut diethanolamide.
9. The energy-increasing blocking remover according to claim 1, wherein the polybasic organic acid is one or a combination of two or more selected from citric acid, polyacrylic acid and tricarballylic acid.
10. The energy-increasing deblocking agent according to claim 1, wherein the fluorine salt is selected from one or both of ammonium fluoride and ammonium bifluoride.
11. The energizing deblocking agent according to claim 1, wherein the fluoroborate is selected from one or both of sodium fluoroborate and ammonium fluoroborate.
12. The energy-increasing blocking remover according to claim 1, wherein the corrosion inhibitor is one or a combination of more than two of benzotriazole, 2-mercaptobenzothiazole and imidazoline quaternary ammonium salt.
13. The energy-increasing blockage removing agent according to claim 1, wherein the clay anti-swelling agent is selected from one or two of a clay anti-swelling agent HJZ-100 and a clay anti-swelling agent HJZ-300.
14. The energy-increasing deblocking agent according to claim 1, wherein the iron ion stabilizer is selected from one or both of ethylenediaminetetraacetic acid and ethylenediaminetetrapropionic acid.
15. The method for preparing the energy-increasing deblocking agent according to any one of claims 1 to 14, characterized by comprising the steps of:
preparation of energizer preparation A: at room temperature, sequentially adding water, nitrite, carbamide, foaming agent and foam stabilizer into a container, and uniformly stirring;
preparation of energizer preparation B: at room temperature, sequentially adding water, ammonium salt, a dispersing agent and polybasic organic acid into a container, and uniformly stirring;
preparation of acid preparation: sequentially adding water, polybasic organic acid, villiaumite, fluoborate, corrosion inhibitor, clay anti-swelling agent and iron ion stabilizer into a corrosion-resistant container at room temperature, and uniformly stirring to obtain the anti-swelling agent;
wherein the energizer preparation A and the energizer preparation B jointly constitute 100 percent by mass of the energizer preparation components, and the energizer preparation A, the energizer preparation B and the acid preparation are separately present before application.
16. Use of the energized blocking remover of any one of claims 1-14 to treat oil well plugging.
17. Use according to claim 16, characterized in that it comprises the following steps:
injecting an energy increasing preparation into the well, and then injecting an acid preparation, thereby completing the operation;
preferably, the operation is completed by injecting the energizer agent A, then injecting water, further injecting the energizer agent B and finally injecting the acid preparation into the well.
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