CN115386353A - Hypotonic oil field profile control and pressure boosting water well pressure reducing and injection increasing working fluid and preparation method thereof - Google Patents
Hypotonic oil field profile control and pressure boosting water well pressure reducing and injection increasing working fluid and preparation method thereof Download PDFInfo
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- CN115386353A CN115386353A CN202110570700.4A CN202110570700A CN115386353A CN 115386353 A CN115386353 A CN 115386353A CN 202110570700 A CN202110570700 A CN 202110570700A CN 115386353 A CN115386353 A CN 115386353A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 117
- 238000002347 injection Methods 0.000 title claims abstract description 89
- 239000007924 injection Substances 0.000 title claims abstract description 89
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000012530 fluid Substances 0.000 title claims description 19
- 239000012224 working solution Substances 0.000 claims abstract description 55
- 239000003921 oil Substances 0.000 claims abstract description 42
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 28
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- 239000002270 dispersing agent Substances 0.000 claims abstract description 14
- 239000003381 stabilizer Substances 0.000 claims abstract description 13
- 239000011248 coating agent Substances 0.000 claims abstract description 12
- 239000008399 tap water Substances 0.000 claims abstract description 12
- 235000020679 tap water Nutrition 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims description 42
- 235000019198 oils Nutrition 0.000 claims description 40
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 36
- 230000009467 reduction Effects 0.000 claims description 24
- 238000006243 chemical reaction Methods 0.000 claims description 16
- XMGQYMWWDOXHJM-UHFFFAOYSA-N limonene Chemical compound CC(=C)C1CCC(C)=CC1 XMGQYMWWDOXHJM-UHFFFAOYSA-N 0.000 claims description 16
- YHQGMYUVUMAZJR-UHFFFAOYSA-N α-terpinene Chemical compound CC(C)C1=CC=C(C)CC1 YHQGMYUVUMAZJR-UHFFFAOYSA-N 0.000 claims description 16
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 14
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 14
- 235000019864 coconut oil Nutrition 0.000 claims description 14
- 239000003240 coconut oil Substances 0.000 claims description 14
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 14
- 229930195729 fatty acid Natural products 0.000 claims description 14
- 239000000194 fatty acid Substances 0.000 claims description 14
- 150000004665 fatty acids Chemical class 0.000 claims description 14
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 14
- RYYKJJJTJZKILX-UHFFFAOYSA-M sodium octadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCC([O-])=O RYYKJJJTJZKILX-UHFFFAOYSA-M 0.000 claims description 14
- CRWJEUDFKNYSBX-UHFFFAOYSA-N sodium;hypobromite Chemical compound [Na+].Br[O-] CRWJEUDFKNYSBX-UHFFFAOYSA-N 0.000 claims description 14
- AGNTUZCMJBTHOG-UHFFFAOYSA-N 3-[3-(2,3-dihydroxypropoxy)-2-hydroxypropoxy]propane-1,2-diol Chemical compound OCC(O)COCC(O)COCC(O)CO AGNTUZCMJBTHOG-UHFFFAOYSA-N 0.000 claims description 12
- POULHZVOKOAJMA-UHFFFAOYSA-M dodecanoate Chemical compound CCCCCCCCCCCC([O-])=O POULHZVOKOAJMA-UHFFFAOYSA-M 0.000 claims description 12
- 229940070765 laurate Drugs 0.000 claims description 12
- 229940049964 oleate Drugs 0.000 claims description 12
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 12
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 12
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 12
- -1 N-hexadecylamine sodium Chemical compound 0.000 claims description 11
- WHUUTDBJXJRKMK-UHFFFAOYSA-N Glutamic acid Natural products OC(=O)C(N)CCC(O)=O WHUUTDBJXJRKMK-UHFFFAOYSA-N 0.000 claims description 9
- 235000013922 glutamic acid Nutrition 0.000 claims description 9
- 239000004220 glutamic acid Substances 0.000 claims description 9
- 229940087305 limonene Drugs 0.000 claims description 8
- 235000001510 limonene Nutrition 0.000 claims description 8
- WSTYNZDAOAEEKG-UHFFFAOYSA-N Mayol Natural products CC1=C(O)C(=O)C=C2C(CCC3(C4CC(C(CC4(CCC33C)C)=O)C)C)(C)C3=CC=C21 WSTYNZDAOAEEKG-UHFFFAOYSA-N 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000002671 adjuvant Substances 0.000 claims 2
- 229920000642 polymer Polymers 0.000 abstract description 26
- 239000011435 rock Substances 0.000 abstract description 17
- 238000011161 development Methods 0.000 abstract description 11
- 239000003129 oil well Substances 0.000 abstract description 8
- 239000011148 porous material Substances 0.000 abstract description 8
- 239000000126 substance Substances 0.000 abstract description 7
- 239000000084 colloidal system Substances 0.000 abstract description 3
- 239000000243 solution Substances 0.000 abstract description 2
- 239000008346 aqueous phase Substances 0.000 abstract 1
- 238000006722 reduction reaction Methods 0.000 description 19
- FJLUATLTXUNBOT-UHFFFAOYSA-N 1-Hexadecylamine Chemical compound CCCCCCCCCCCCCCCCN FJLUATLTXUNBOT-UHFFFAOYSA-N 0.000 description 11
- 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 description 11
- 229910052708 sodium Inorganic materials 0.000 description 11
- 239000011734 sodium Substances 0.000 description 11
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 11
- 239000000047 product Substances 0.000 description 8
- 238000011084 recovery Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 239000004094 surface-active agent Substances 0.000 description 7
- 238000004090 dissolution Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000003814 drug Substances 0.000 description 5
- 239000000693 micelle Substances 0.000 description 5
- 238000005406 washing Methods 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 230000036772 blood pressure Effects 0.000 description 4
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 4
- 238000006731 degradation reaction Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 239000004005 microsphere Substances 0.000 description 4
- 229920002401 polyacrylamide Polymers 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 229920006037 cross link polymer Polymers 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 150000003254 radicals Chemical class 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000013543 active substance Substances 0.000 description 2
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 239000009096 changqing Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- BXWNKGSJHAJOGX-UHFFFAOYSA-N hexadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCO BXWNKGSJHAJOGX-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- KWIUHFFTVRNATP-UHFFFAOYSA-N Betaine Natural products C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 description 1
- KWIUHFFTVRNATP-UHFFFAOYSA-O N,N,N-trimethylglycinium Chemical compound C[N+](C)(C)CC(O)=O KWIUHFFTVRNATP-UHFFFAOYSA-O 0.000 description 1
- 125000003368 amide group Chemical group 0.000 description 1
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 1
- 239000002280 amphoteric surfactant Substances 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229960003237 betaine Drugs 0.000 description 1
- 239000003093 cationic surfactant Substances 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 229960000541 cetyl alcohol Drugs 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000002120 nanofilm Substances 0.000 description 1
- 239000002332 oil field water Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/5045—Compositions based on water or polar solvents containing inorganic compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/5086—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/524—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning organic depositions, e.g. paraffins or asphaltenes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/528—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning inorganic depositions, e.g. sulfates or carbonates
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Preparation (AREA)
- Colloid Chemistry (AREA)
Abstract
The invention provides a hypotonic oil field profile control and pressure increasing water well pressure reducing and injection increasing working solution and a preparation method thereof, wherein the working solution comprises the following components in percentage by weight: a main agent: 20 to 30 percent; auxiliary agents: 5 to 8 percent; auxiliary agent: 5 to 8 percent; dispersing agent: 3 to 5 percent; a stabilizer: 3 to 5 percent; coating agent: 5 to 10 percent; the rest is industrial tap water. The invention can solve the problem that the profile control polymer with large dosage is blocked at the far end of the well shaft of the water injection well in the early stage and dredge the water drive channel of the stratum. The working solution for reducing pressure and increasing injection provided by the invention slowly releases effective substances, reduces viscosity, dissolves and degrades a profile control polymer, disperses organic blockages such as residual waxiness, colloid and asphaltene in a water drive channel, communicates an oil-water well affected channel, cleans residual oil on the wall surface of rock, enlarges the water drive pore throat of the channel, reduces the interfacial tension and the tubular force of the solution, reduces the flow resistance of an aqueous phase, achieves the purpose of reducing pressure and increasing injection of the water well, enables the water drive energy of a corresponding oil well to be affected, and realizes the efficient development of the whole block development.
Description
Technical Field
The invention relates to the technical field of blocking removal of a low-permeability oil field water well, in particular to a low-permeability oil field profile control and pressure boosting water well pressure reduction and injection increasing working solution and a preparation method thereof.
Background
In order to improve the recovery ratio of the whole block in the production and development process of the low-permeability oil field, the stratum energy is kept by water injection development, and after water-drive secondary oil recovery, the whole water content of the block is improved, so that the yield of an oil well is increased. The water content of the corresponding oil wells of the well group is increased due to the water flooding after years or decades of development of the low-permeability oil field, and the overall productivity of a block is influenced. The water-controlled oil-increasing and profile-controlling method starts to integrally profile control, drive control and water increase aiming at the block with too fast water content of the oil well in the water injection development process, reduces the integral water content of the block and ensures the stable yield of the block.
The profile control and profile control material mainly comprises polymer microspheres, PEG, polyacrylamide composite cross-linked body, surfactant and other systems, wherein the polymer component in the material accounts for more than 90% of the profile control and profile control material. In the last three years, the number of the profile control wells of the low-permeability oil field in Changqing reaches 4000 wells per year, and the injection mode is changed from the original single-well injection to the pipe network of the water injection station. With the increase of the injection volume of polymers in profile control and profile control, about 10 percent of water wells have high water injection pressure due to polymer injection, which cannot achieve the phenomena of injection allocation and intermittent injection, and the like because of the influence of the physical properties and heterogeneity of a reservoir, and the water drive efficiency of blocks is seriously influenced because the number of the blocked wells due to polymer injection is still increased every year.
Aiming at the high-pressure under-injection well, the Changqing low-permeability oil field finishes 756 small fracturing, acidizing and blockage removal of the secondary water well, and the like, a certain pressure-reducing and injection-increasing effect is obtained by 2020. Analysis shows that the proportion of the high-pressure under-injection well in 78 ineffective wells is up to 77% in the early period of profile control and profile control, and the problems of low water flooding efficiency and short validity period commonly exist after the blockage removal of the wells. In order to improve the effective rate of profile control and profile control for plugging removal of a high-pressure insufficient water injection well and the efficiency of water drive, a pressure reduction and injection enhancement working solution for a profile control and pressure increase well in a low-permeability oil field needs to be developed in a targeted manner, so that the high-pressure insufficient water injection well is effectively treated, the aim of overall efficient development of a block is fulfilled, and the requirement of stable yield of the low-permeability oil field is met.
Chinese patent publication No. CN109913193A, 6.21.2019 discloses a pressure-reducing and injection-increasing agent for a low-permeability oil reservoir water injection well and a preparation method thereof; the blood pressure reducing and injection increasing agent comprises the following components in parts by weight: 50 to 55 parts of dehydroabietic surfactant, 7 to 11 parts of betaine amphoteric surfactant, 18 to 22 parts of cationic surfactant, 8978 parts of cetyl alcohol, 8978 parts of zxft 8978 parts of ethanol, and the total weight of the mixture is 100 parts. The pressure-reducing injection-increasing agent can remove an oil film, wherein a cation component takes water as a transfer medium to form a molecular film on the surface of a rock, so that clay is stabilized, the wettability of the surface of the rock is improved, and the water injection friction and the capillary resistance are reduced, thereby achieving the purposes of reducing the water injection pressure, improving the water injection capacity of a low-permeability oil reservoir and improving the water drive efficiency.
Chinese patent publication No. CN109251739A, 1 month and 22 days 2019 discloses a blood pressure reducing and injection increasing medicament and a preparation method thereof, wherein the blood pressure reducing and injection increasing medicament is prepared from the following raw materials in percentage by weight: 20 to 25 percent of scale remover; 0.1 to 0.3 percent of surfactant; 0.1 to 0.3 percent of penetrant; 0.5 to 1 percent of corrosion inhibitor; 10 to 15 percent of solvent; the balance being water. The pressure-reducing injection-increasing medicament can effectively prevent scale such as calcium sulfate, barium sulfate, calcium carbonate and the like from forming, reduce the oil-water interfacial tension, change the wettability of rock, and simultaneously has better diffusion and cleaning performance. The blood pressure lowering and injection increasing medicament has stable performance, long service life, wide raw material source and low price, and can be stored and used for a long time. The pressure-reducing injection-increasing medicament can be directly pumped into a well bottom through the local pressurizing pry, is convenient to use, does not corrode equipment and a pipe column, can solve the problem that the pressure of a water injection well is increased due to the fact that the water injection well is blocked again by scaling in a zone close to the well stratum after the local pressurizing pry is used for increasing pressure, and has a good application prospect in the aspect of pressure reduction and injection increase of a water well.
The pressure-reducing injection-increasing working fluid for the high-pressure water short injection well represented by the patent mainly comprises the following three types: (1) the surfactant is adsorbed on the surface of the rock to form a layer of surfactant film, so that the wettability of the surface of the rock is changed (improved), and the resistance of the water-driving capillary is reduced, thereby reducing the water injection pressure; (2) acid liquids are used for dredging a water flow channel by dissolving inorganic scales so as to reduce water drive pressure; (3) strong oxidants: such as ammonium persulfate, release free radical charges to decompose organic plugs, thereby achieving the purpose of plug removal and injection increase.
The three methods all have certain effects on the blockage removal and injection increase of the water well. However, aiming at the problems of strong heterogeneity and high water drive starting pressure of a reservoir of a hypotonic oil field, the water drive flow direction mainly flows in cracks and microcracks, particularly, the high-dose polymer profile control is carried out in the early stage, the polymer is pushed to the far end of the deep part of the reservoir, general acid liquid and a strong oxidant are consumed in the reaction process, and the high molecular polymer cannot be degraded due to the surface activity.
Therefore, it is necessary to develop a working solution capable of better solving the above problems for the pressure reduction and injection enhancement of the profile control and pressure increase water well of the low-permeability oil field, so as to solve the pressure reduction and injection enhancement of the profile control and pressure increase water well, recover the water injection energy supplement of a well group and promote the efficient development of the whole block.
Disclosure of Invention
In order to overcome the problem that a large amount of profile control polymer is blocked at the far end of a well shaft of a water injection well at the early stage, the invention provides a pressure-reducing and injection-increasing working solution for a profile control and pressure-increasing well of a low-permeability oil field and a preparation method thereof. Under the combined action of the auxiliary agent and the auxiliary agent, the invention enhances the water displacement efficiency, promotes the discharge of residual oil in rock pore canals, improves the water-drive oil-washing capacity and further improves the water-drive recovery ratio.
The technical scheme adopted by the invention is as follows:
a hypotonic oil field profile control pressure-boosting well pressure-reducing injection-increasing working solution comprises the following components in percentage by weight: a main agent: 20 to 30 percent; auxiliary agents: 5 to 8 percent; auxiliary agent: 5 to 8 percent; dispersing agent: 3 to 5 percent; a stabilizer: 3 to 5 percent; coating agent: 5 to 10 percent; the rest is industrial tap water.
The main agent consists of sodium hypochlorite and sodium hypobromite, wherein the sodium hypochlorite accounts for 15-20% of the weight of the working solution formula, and the sodium hypobromite accounts for 5-10% of the weight of the working solution formula.
The auxiliary agent consists of sodium stearate and N-hexadecylamine and N, N-dipropyl sodium sulfonate, wherein the sodium stearate accounts for 3-5% of the weight of the working solution formula, and the N-hexadecylamine and N, N-dipropyl sodium sulfonate accounts for 2-3% of the weight of the working solution formula.
The auxiliary agent consists of coconut oil fatty acid diethanolamide and triethanolamine, wherein the coconut oil fatty acid diethanolamide accounts for 3-5% of the weight of the working solution formula, and the triethanolamine accounts for 2-3% of the weight of the working solution formula.
The dispersant is one or more of limonene or alpha-terpinene.
The stabilizer is glutamic acid diacetic acid sodium salt.
The coating agent consists of triglycerol oleate and glycerol polyoxyethylene ether laurate, wherein the triglycerol oleate accounts for 3-5% of the weight of the working solution formula, and the glycerol polyoxyethylene ether laurate accounts for 2-5% of the weight of the working solution formula.
A preparation method of a hypotonic oilfield profile control and pressure rise water well pressure reduction and injection increase working solution comprises the steps of firstly adding industrial tap water into a reaction kettle in proportion, heating the reaction kettle to 70-80 ℃, then adding a coating agent in proportion, and stirring for 20-30min; adding the dispersant in proportion, and stirring for 20-30min; then adding the stabilizer in proportion, and stirring for 10-20min; then adding the auxiliary agent according to the proportion, and stirring for 10-20min; adding the auxiliary agents according to the proportion, and stirring for 40-60min; cooling to room temperature; and finally, adding the main agent in proportion, and stirring for 10-20min to produce the low-permeability oil field profile control and pressure rise water well pressure reduction and injection enhancement working solution product.
The invention has the beneficial effects that:
the invention slowly releases effective substances to remove profile control polymers at the deep part of the shaft, removes organic-inorganic plugs in a water drive flow channel, and simultaneously has excellent performance of reducing interfacial tension, improves rock wettability and reduces water drive resistance. Under the combined action of the auxiliary agent and the auxiliary agent, the invention enhances the water displacement efficiency, promotes the discharge of residual oil in rock pore canals, improves the water-drive oil-washing capacity and further improves the water-drive recovery ratio.
Detailed Description
Example 1:
in order to overcome the problem that a large amount of profile control polymer is blocked at the far end of a well shaft of a water injection well at the early stage, the invention provides a pressure-reducing and injection-increasing working solution for a profile control and pressure-increasing well of a low-permeability oil field and a preparation method thereof. Under the combined action of the auxiliary agent and the auxiliary agent, the invention enhances the water displacement efficiency, promotes the discharge of residual oil in rock pore canals, improves the water-drive oil-washing capacity and further improves the water-drive recovery ratio.
A hypotonic oil field profile control pressure-boosting water well pressure-reducing injection-increasing working fluid comprises the following components in percentage by weight: a main agent: 20 to 30 percent; auxiliary agents: 5 to 8 percent; auxiliary agent: 5 to 8 percent; dispersing agent: 3 to 5 percent; a stabilizer: 3 to 5 percent; coating agent: 5 to 10 percent; the rest is industrial tap water.
The invention is applied to the technical field of depressurization and injection increase of high-pressure under-injection wells after profile control and profile control of low-permeability oil fields. The low-permeability oil field is influenced by water content rising of water drive, profile control and profile control are carried out in a water well in a large scale, so that the overall recovery rate of a block is improved, and the pressure of a water distribution well at the rear part of profile control and profile control of a well group is increased to cause high-pressure short injection, so that the energy receiving effect of a local oil well is influenced. The pressure-reducing injection-increasing working solution provided by the invention is directed at a profile control, profile control and flooding polymer system, has long slow release period, high viscosity reduction and degradation performance on a cross-linked polymer, can disperse the blockage of high-molecular organic matters in the deep part of a reservoir, expand the pore throat of a water drive channel, communicate an oil-water well effect-receiving channel, and achieve the purposes of reducing pressure and increasing injection of a water well, corresponding to the effect of water drive energy of an oil well and improving the overall development benefit of a block.
The invention slowly releases effective substances to remove the profile control polymer at the deep part of the shaft, removes organic-inorganic blocking substances in a water drive flow channel, and simultaneously has excellent interface tension reducing performance, improves rock wettability and reduces water drive resistance. Under the combined action of the auxiliary agent and the auxiliary agent, the invention enhances the water displacement efficiency, promotes the discharge of residual oil in rock pore canals, improves the water-drive oil-washing capacity and further improves the water-drive recovery ratio.
Example 2:
based on the embodiment 1, in this embodiment, preferably, the main agent is composed of sodium hypochlorite and sodium hypobromite, wherein the sodium hypochlorite accounts for 15-20% of the weight of the working solution formula, and the sodium hypobromite accounts for 5-10% of the weight of the working solution formula.
Preferably, the auxiliary agent consists of sodium stearate and N-hexadecylamine and N, N-dipropyl sodium sulfonate, wherein the sodium stearate accounts for 3-5% of the weight of the working solution formula, and the N-hexadecylamine and N, N-dipropyl sodium sulfonate accounts for 2-3% of the weight of the working solution formula.
Preferably, the auxiliary agent consists of coconut oil fatty acid diethanolamide and triethanolamine, wherein the coconut oil fatty acid diethanolamide accounts for 3-5% of the weight of the working solution formula, and the triethanolamine accounts for 2-3% of the weight of the working solution formula.
Preferably, the dispersant is one or more of limonene or alpha-terpinene.
Preferably, the stabilizing agent is glutamic acid diacetic acid sodium salt.
Preferably, the coating agent consists of triglycerol oleate and glycerol polyoxyethylene ether laurate, wherein the triglycerol oleate accounts for 3-5% of the weight of the working solution formula, and the glycerol polyoxyethylene ether laurate accounts for 2-5% of the weight of the working solution formula.
A preparation method of a hypotonic oilfield profile control and pressure rise water well pressure reduction and injection increase working solution comprises the steps of firstly adding industrial tap water into a reaction kettle in proportion, heating the reaction kettle to 70-80 ℃, then adding a coating agent in proportion, and stirring for 20-30min; adding the dispersant in proportion, and stirring for 20-30min; then adding the stabilizer in proportion, and stirring for 10-20min; adding the auxiliary agent according to the proportion, and stirring for 10-20min; adding the auxiliary agents according to the proportion, and stirring for 40-60min; cooling to room temperature; and finally, adding the main agent in proportion, and stirring for 10-20min to produce the low-permeability oil field profile control and pressure rise water well pressure reduction and injection enhancement working solution product.
The invention can release the profile control polymer in the deep part of the shaft by slowly releasing the effective substance.
In the invention, sodium hypochlorite and sodium hypobromite are emulsified and coated by a coating agent (triglycerol oleate and glycerol polyoxyethylene ether laurate) and a dispersing agent (limonene or alpha-terpinene) in a mixed phase, and sodium stearate and coconut oil fatty acid diethanolamide form an active agent micelle to prevent the sodium hypochlorite and the sodium hypobromite from being released quickly. The main agent can also inhibit ionization balance in an alkaline environment formed by triethanolamine and slow down the release speed. The main agent delays the reaction, is beneficial to expanding the injection plugging removal radius, and can contact the profile control polymer at the deep part of the shaft. The whole working solution is in an alkaline environment, and can cause hydrolysis of amido or other functional groups in the polyacrylamide polymer in the polymer plug to promote degradation; and secondly, sodium hypochlorite and sodium hypobromite can release free radicals fully, the free radicals of the main chain of the polymer are broken and degraded, so that molecular chains are broken (the molecular weight is reduced) or intermolecular crosslinking is caused, and the degradation is more complete under the alkaline condition.
The invention can remove organic-inorganic blocking substances in the water drive flow channel.
In the invention, the dispersant (limonene or alpha-terpinene) can disperse and dissolve part of organic blockages such as residual waxiness, colloid and asphaltene and the like in a water drive channel by utilizing the principle of phase recognition compatibility. The stabilizer (glutamic acid diacetic acid sodium salt) can chelate inorganic plugs such as calcium carbonate, calcium sulfate and the like in the water drive channel, and simultaneously inhibits metal ions injected into water, reduces water drive scaling and is beneficial to prolonging the effective period of pressure reduction and injection increase.
The invention has excellent performance of reducing interfacial tension, improves the wettability of rock and reduces water drive resistance. The sodium stearate and the coconut oil fatty acid diethanolamide form an active agent micelle, the interfacial tension of injected water is obviously reduced, the oil-water interfacial tension is further reduced under the assistance of N-hexadecylamine, N, N-dipropyl sodium sulfonate and triethanolamine, the rock wettability is improved, and the flow resistance of the injected water in a water flow channel is reduced, so that the water injection pressure is reduced.
The invention can improve the water-drive oil-washing capability. The sodium stearate and the coconut oil fatty acid diethanolamide form micelles, so that the rock wall surface can be well cleaned, and the formed surfactant micelles and alkaline conditions are utilized under the synergistic effect of N-hexadecylamine, N, N-dipropyl sodium sulfonate and triethanolamine, so that the water flooding efficiency is enhanced, the residual oil in rock pore channels is promoted to be discharged, and the water flooding recovery ratio is further improved.
The low-permeability oilfield profile control and pressure boosting water well pressure reduction and injection enhancement working solution provided by the invention can slowly release effective substances, and profile control polymers (polyacrylamide, cross-linked polyacrylamide, acrylic acid, bulk expanded particles and polymer microspheres) are subjected to viscosity reduction, dissolution and degradation; organic blockages such as residual waxiness, colloid and asphaltene in the water drive channel are dispersed to communicate with the oil-water well affected channel; cleaning the residual oil on the wall surface of the rock and expanding the pore throat of the water drive channel; the surfactant micelle formed in the working solution is utilized to reduce the solution interfacial tension and the capillary force to reduce the flow resistance of the water phase, thereby achieving the purpose of reducing the pressure and increasing the injection of the water well. And recovering water injection energy supplement of the well group, so that the water drive energy of the corresponding oil well is affected, and the efficient development of the block overall development is realized.
Example 3:
based on the embodiment 1 or 2, in the embodiment, the main agent comprises the following components in percentage by weight in the hypotonic oilfield profile control and pressure raising well depressurization and injection increasing working fluid: 20 percent, wherein the weight percentage of the sodium hypochlorite is 15 percent, and the weight percentage of the sodium hypobromite is 5 percent; auxiliary agents: 5 percent, wherein the weight percentage of sodium stearate is 3 percent, the weight percentage of N-hexadecylamine group, the weight percentage of N, N-dipropyl sodium sulfonate is 2 percent; auxiliary agent: 5 percent, wherein the weight percentage of the coconut oil fatty acid diethanolamide is 3 percent, and the weight percentage of the triethanolamine is 2 percent; dispersing agent: 3%, stabilizer: 3%, coating agent: 5 percent, wherein the weight percent of the triglycerol oleate is 3 percent, and the weight percent of the glycerol polyoxyethylene ether laurate is 2 percent; the rest is industrial tap water.
In the invention, the adopted dispersant is one or more of limonene or alpha-terpinene; the stabilizer is glutamic acid diacetic acid sodium salt.
Firstly, adding all tap water into a reaction kettle, heating the reaction kettle to 70-80 ℃, adding all triglycerol oleate and glycerol polyoxyethylene ether laurate, and stirring for 20-30min; adding one or more of limonene or alpha-terpinene, and stirring for 20-30min; adding all glutamic acid diacetic acid sodium salt, and stirring for 10-20min; adding all coconut oil fatty acid diethanolamide and triethanolamine, and stirring for 10-20min; adding all sodium stearate, N-hexadecylamine and N, N-dipropyl sodium sulfonate, and stirring for 40-60min; cooling to room temperature; and finally, adding all sodium hypochlorite and sodium hypobromite, and stirring for 10-20min to produce the low-permeability oil field profile control and pressure rise water well pressure reduction and injection enhancement working solution product.
Example 4:
based on embodiment 1 or 2, in this embodiment, a method for preparing a hypotonic oil field profile control and pressure increasing water well pressure reducing and injection increasing working solution is provided, wherein according to the weight percentage of the hypotonic oil field profile control and pressure increasing water well pressure reducing and injection increasing working solution, 54% of tap water is firstly added into a reaction kettle, the reaction kettle is heated to 70 ℃, 3% of triglycerol oleate and 2% of glycerol polyoxyethylene ether laurate are added, and stirring is performed for 20min; adding all 5% limonene, and stirring for 20min; adding 5% glutamic acid diacetic acid sodium salt, and stirring for 10min; adding 3% coconut oil fatty acid diethanolamide and 2% triethanolamine, and stirring for 10min; then adding 3% sodium stearate and 3%N-hexadecylamine and N, N-dipropyl sodium sulfonate, and stirring for 60min; cooling to room temperature; and finally, adding all 15% of sodium hypochlorite and 5% of sodium hypobromite, and stirring for 10min to produce the low-permeability oil field profile control and pressure rise water well pressure reduction and injection enhancement working solution product.
Example 5:
based on embodiment 1 or 2, in this embodiment, a method for preparing a hypotonic oilfield profile control and pressure boosting well depressurization and injection increasing working fluid is provided, wherein according to the weight percentage of the hypotonic oilfield profile control and pressure boosting well depressurization and injection increasing working fluid, 40% of tap water is added into a reaction kettle, the reaction kettle is heated to 80 ℃, 5% of triglycerol oleate and 5% of glycerol polyoxyethylene ether laurate are added, and stirring is performed for 30min; adding all 3%a-terpinene, and stirring for 30min; adding 3% glutamic acid diacetic acid sodium salt, and stirring for 20min; adding 5% coconut oil fatty acid diethanolamide and 3% triethanolamine, and stirring for 20min; then adding 4% sodium stearate and 2%N-hexadecylamine and N, N-dipropyl sodium sulfonate, and stirring for 40min; cooling to room temperature; and finally, adding all 20% of sodium hypochlorite and 10% of sodium hypobromite, and stirring for 20min to produce the low-permeability oil field profile control and pressure rise water well pressure reduction and injection enhancement working solution product.
Example 6:
based on the embodiment 1 or 2, in this embodiment, a preparation method of a hypotonic oilfield profile control and pressure boosting well depressurization and injection increasing working solution is provided, wherein according to the weight percentage of the hypotonic oilfield profile control and pressure boosting well depressurization and injection increasing working solution, 45% of tap water is added into a reaction kettle, the reaction kettle is heated to 70 ℃, 4% of triglycerol oleate and 4% of glycerol polyoxyethylene ether laurate are added, and stirring is performed for 20min; adding all 5%a-terpinene, stirring for 20min; adding 5% glutamic acid diacetic acid sodium salt, and stirring for 10min; adding 4% coconut oil fatty acid diethanolamide and 2% triethanolamine, and stirring for 10min; then adding 4% sodium stearate and 3%N-hexadecylamine and N, N-dipropyl sodium sulfonate, and stirring for 60min; cooling to room temperature; and finally, adding all 15% of sodium hypochlorite and 5% of sodium hypobromite, and stirring for 10min to produce the low-permeability oil field profile control and pressure increasing water well pressure reducing and injection increasing working solution product.
Example 7:
taking a D127 well as an example, the water injection pressure is maintained at 16.1MPa after three times of fracturing or acidizing deblocking in the early stage, because the water content of the corresponding oil well is higher, polymer microspheres and a cross-linked polymer agent are adopted for composite profile control in 8 months in 2019, the water injection pressure is quickly increased to 19.4MPa after the profile control, the effective period is shorter after two times of acidizing deblocking and one time of acid fracturing, the maximum limit of a water injection pipe network is 21.2MPa, and the injection allocation is 20m 3 Practice of only 3m 3 The well fluid volume decreases significantly.
Using 700 type cement truck at 0.5m 3 Permin discharge injection hypotonic oil field profile control boosting water well pressure reduction and injection increase working fluid 40m 3 Then the water is continuously replaced by 60m 3 And water is injected normally. After the measures, the annual water injection pressure is reduced by 3.6MPa, and the daily injection is increased by 27m 3 Cumulative injection amount 4131m 3 When the effective period exceeds 5 months, the pressure reduction and injection increase are still continuously effective, and the well group energy is fully supplemented, as shown in the following table 1.
TABLE 1 test well Effect
The performance of the hypotonic oil field profile control and pressure increasing water well pressure reducing and injection increasing working fluid product prepared by the formula in the embodiment 3-6 is tested. Wherein, the dissolution rates of the hypotonic oilfield profile control and pressure boosting water well pressure reduction and injection enhancement working solution to various profile control polymers at different times at 70 ℃ are tested. The dissolution ascending period of the working solution to the polymer is distributed in 8-72h, the dissolution rate of the final working solution to the polymer microspheres is the highest and reaches 87.54 percent, the dissolution rate to the cross-linked polymer is 65.96 percent, and the dissolution rate to the bulk expanded particles is 53.84 percent.
The low permeability oilfield profile control and pressure rise water well depressurization and injection enhancement working fluid products prepared by the formulations in the above examples 3-6 were tested for interfacial tension at different concentrations, and the interfacial tension was tested to reach 7.23 x 10 when the working fluid addition was 0.2% concentration -3 mN/m,0.3% concentration the interfacial tension reached 5.14 x 10 -4 mN/m。
The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the present invention, and all designs identical or similar to the present invention are within the scope of the present invention. The reagents and process steps not described in detail in this example are well known and commonly used in the art and will not be described herein.
Claims (8)
1. A hypotonic oil field profile control and pressure rise water well pressure reduction and injection increase working fluid is characterized in that the working fluid comprises the following components in percentage by weight: a main agent: 20 to 30 percent; auxiliary agents: 5 to 8 percent; auxiliary agent: 5 to 8 percent; dispersing agent: 3 to 5 percent; a stabilizer: 3 to 5 percent; coating agent: 5 to 10 percent; the rest is industrial tap water.
2. The working solution for profile control and pressure rise of the water well of the hypotonic oilfield according to claim 1, wherein the main agent comprises sodium hypochlorite and sodium hypobromite, wherein the sodium hypochlorite accounts for 15-20% of the weight of the working solution formula, and the sodium hypobromite accounts for 5-10% of the weight of the working solution formula.
3. The working solution for profile control and pressure increase of the water well for pressure reduction and injection increase in the hypotonic oil field as claimed in claim 1, wherein the adjuvant comprises sodium stearate and N-hexadecylamine sodium N, N-dipropyl sulfonate, wherein the sodium stearate accounts for 3-5 wt% of the formula of the working solution, and the N-hexadecylamine sodium N, N-dipropyl sulfonate accounts for 2-3 wt% of the formula of the working solution.
4. The working fluid for reducing pressure and increasing injection of the profile control and pressure-boosting well of the hypotonic oilfield according to claim 1, is characterized in that the auxiliary agent consists of coconut oil fatty acid diethanolamide and triethanolamine, wherein the coconut oil fatty acid diethanolamide accounts for 3-5% of the weight of the working fluid formula, and the triethanolamine accounts for 2-3% of the weight of the working fluid formula.
5. The working fluid for reducing pressure and increasing injection of the profile control and pressure-boosting well in the hypotonic oilfield according to claim 1, wherein the dispersant is one or more of limonene or alpha-terpinene.
6. The working fluid for reducing pressure and increasing injection of the profile control and pressure-boosting well in the hypotonic oilfield according to claim 1, wherein the stabilizer is glutamic acid diacetic acid sodium salt.
7. The working solution for profile control and pressure rise water well pressure reduction and injection enhancement of the hypotonic oilfield according to claim 1, wherein the coating agent comprises triglycerol oleate and glycerol polyoxyethylene ether laurate, wherein the triglycerol oleate accounts for 3-5% by weight of the formula of the working solution, and the glycerol polyoxyethylene ether laurate accounts for 2-5% by weight of the formula of the working solution.
8. A preparation method of a hypotonic oil field profile control and pressure rise water well pressure reduction and injection increase working solution is characterized by comprising the following steps: firstly, adding industrial tap water into a reaction kettle in proportion, heating the reaction kettle to 70-80 ℃, then adding a coating agent in proportion, and stirring for 20-30min; adding the dispersant in proportion, and stirring for 20-30min; then adding the stabilizer in proportion, and stirring for 10-20min; adding the auxiliary agent according to the proportion, and stirring for 10-20min; adding adjuvants at a certain proportion, and stirring for 40-60min; cooling to room temperature; and finally, adding the main agent in proportion, and stirring for 10-20min to produce the low-permeability oil field profile control and pressure rise water well pressure reduction and injection enhancement working solution product.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6613720B1 (en) * | 2000-10-13 | 2003-09-02 | Schlumberger Technology Corporation | Delayed blending of additives in well treatment fluids |
| GB0406993D0 (en) * | 2004-03-27 | 2004-04-28 | Cleansorb Ltd | Process for treating underground formations |
| CN102108293A (en) * | 2009-12-23 | 2011-06-29 | 中国石油天然气股份有限公司 | Preparation method of slow-release rubber breaking agent for chemical temporary-plugging rubber plug |
| CN102925128A (en) * | 2012-11-05 | 2013-02-13 | 中国海洋石油总公司 | Compound chemical blocking removing agent of oil field polymer injection well |
| US20130098611A1 (en) * | 2011-06-22 | 2013-04-25 | Halliburton Energy Services, Inc. | Alkaline persulfate for low-temperature breaking of polymer viscosified fluid |
| US20130317135A1 (en) * | 2012-05-25 | 2013-11-28 | Servicios Especiales San Antonio S.A. | Water shut-off system for production and/or injection wells |
| CN103619984A (en) * | 2011-06-16 | 2014-03-05 | 贝克休斯公司 | Method of inhibiting or controlling release of well treatment agent |
| CN104212426A (en) * | 2013-06-05 | 2014-12-17 | 中国石油天然气股份有限公司 | Wrapped profile control degradation agent |
-
2021
- 2021-05-25 CN CN202110570700.4A patent/CN115386353B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6613720B1 (en) * | 2000-10-13 | 2003-09-02 | Schlumberger Technology Corporation | Delayed blending of additives in well treatment fluids |
| GB0406993D0 (en) * | 2004-03-27 | 2004-04-28 | Cleansorb Ltd | Process for treating underground formations |
| CN102108293A (en) * | 2009-12-23 | 2011-06-29 | 中国石油天然气股份有限公司 | Preparation method of slow-release rubber breaking agent for chemical temporary-plugging rubber plug |
| CN103619984A (en) * | 2011-06-16 | 2014-03-05 | 贝克休斯公司 | Method of inhibiting or controlling release of well treatment agent |
| US20130098611A1 (en) * | 2011-06-22 | 2013-04-25 | Halliburton Energy Services, Inc. | Alkaline persulfate for low-temperature breaking of polymer viscosified fluid |
| US20130317135A1 (en) * | 2012-05-25 | 2013-11-28 | Servicios Especiales San Antonio S.A. | Water shut-off system for production and/or injection wells |
| CN102925128A (en) * | 2012-11-05 | 2013-02-13 | 中国海洋石油总公司 | Compound chemical blocking removing agent of oil field polymer injection well |
| CN104212426A (en) * | 2013-06-05 | 2014-12-17 | 中国石油天然气股份有限公司 | Wrapped profile control degradation agent |
Non-Patent Citations (1)
| Title |
|---|
| 黄春: "《孤东油田化学驱油技术》", 石油大学出版社, pages: 105 * |
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