CN107338036A - Swollen type Solid Free workover fluid of one kind contracting and preparation method thereof - Google Patents
Swollen type Solid Free workover fluid of one kind contracting and preparation method thereof Download PDFInfo
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- CN107338036A CN107338036A CN201710505022.7A CN201710505022A CN107338036A CN 107338036 A CN107338036 A CN 107338036A CN 201710505022 A CN201710505022 A CN 201710505022A CN 107338036 A CN107338036 A CN 107338036A
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- 239000012530 fluid Substances 0.000 title claims abstract description 74
- 239000007787 solid Substances 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 52
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims abstract description 40
- 239000011780 sodium chloride Substances 0.000 claims abstract description 26
- 239000001103 potassium chloride Substances 0.000 claims abstract description 22
- 235000011164 potassium chloride Nutrition 0.000 claims abstract description 22
- 235000010265 sodium sulphite Nutrition 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 14
- 239000012452 mother liquor Substances 0.000 claims abstract description 12
- 229920001285 xanthan gum Polymers 0.000 claims abstract description 12
- 239000000654 additive Substances 0.000 claims abstract description 11
- 230000000996 additive effect Effects 0.000 claims abstract description 11
- 229920001214 Polysorbate 60 Polymers 0.000 claims abstract description 10
- 239000000243 solution Substances 0.000 claims abstract description 9
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 239000012528 membrane Substances 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims abstract description 7
- 239000012895 dilution Substances 0.000 claims abstract description 6
- 238000010790 dilution Methods 0.000 claims abstract description 6
- 238000001914 filtration Methods 0.000 claims abstract description 6
- 239000012047 saturated solution Substances 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims description 20
- -1 Cation quaternary ammonium salt Chemical class 0.000 claims description 8
- 238000013329 compounding Methods 0.000 claims description 8
- 239000002736 nonionic surfactant Substances 0.000 claims description 6
- 125000001181 organosilyl group Chemical group [SiH3]* 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 229920001971 elastomer Polymers 0.000 claims 1
- 230000005713 exacerbation Effects 0.000 claims 1
- 239000011148 porous material Substances 0.000 abstract description 20
- 230000035699 permeability Effects 0.000 abstract description 14
- 239000002734 clay mineral Substances 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 description 16
- 239000011435 rock Substances 0.000 description 12
- 239000004927 clay Substances 0.000 description 10
- 238000007654 immersion Methods 0.000 description 7
- 230000008961 swelling Effects 0.000 description 5
- 238000007664 blowing Methods 0.000 description 4
- 239000007790 solid phase Substances 0.000 description 4
- 235000012216 bentonite Nutrition 0.000 description 3
- OPCRGEVPIBLWAY-QNRZBPGKSA-N ethyl (2E,4Z)-deca-2,4-dienoate Chemical compound CCCCC\C=C/C=C/C(=O)OCC OPCRGEVPIBLWAY-QNRZBPGKSA-N 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000003129 oil well Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- GJCOSYZMQJWQCA-UHFFFAOYSA-N 9H-xanthene Chemical compound C1=CC=C2CC3=CC=CC=C3OC2=C1 GJCOSYZMQJWQCA-UHFFFAOYSA-N 0.000 description 2
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000000440 bentonite Substances 0.000 description 2
- 229910000278 bentonite Inorganic materials 0.000 description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 150000001767 cationic compounds Chemical class 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 229910001411 inorganic cation Inorganic materials 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid group Chemical group C(CCCCCCC\C=C/CCCCCCCC)(=O)O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- GFLJTEHFZZNCTR-UHFFFAOYSA-N 3-prop-2-enoyloxypropyl prop-2-enoate Chemical compound C=CC(=O)OCCCOC(=O)C=C GFLJTEHFZZNCTR-UHFFFAOYSA-N 0.000 description 1
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- UKTDQTGMXUHPIF-UHFFFAOYSA-N [Na].S(O)(O)=O Chemical compound [Na].S(O)(O)=O UKTDQTGMXUHPIF-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 150000001412 amines Chemical group 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000004675 formic acid derivatives Chemical class 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229920000554 ionomer Polymers 0.000 description 1
- 210000000867 larynx Anatomy 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 229910000403 monosodium phosphate Inorganic materials 0.000 description 1
- 235000019799 monosodium phosphate Nutrition 0.000 description 1
- LNOPIUAQISRISI-UHFFFAOYSA-N n'-hydroxy-2-propan-2-ylsulfonylethanimidamide Chemical compound CC(C)S(=O)(=O)CC(N)=NO LNOPIUAQISRISI-UHFFFAOYSA-N 0.000 description 1
- 238000005325 percolation Methods 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 229920000371 poly(diallyldimethylammonium chloride) polymer Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000009938 salting Methods 0.000 description 1
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/602—Compositions for stimulating production by acting on the underground formation containing surfactants
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/607—Compositions for stimulating production by acting on the underground formation specially adapted for clay formations
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/12—Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Dispersion Chemistry (AREA)
- Medicines Containing Material From Animals Or Micro-Organisms (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
A kind of swollen type Solid Free workover fluid that contracts of the present invention, the component composition of following mass fraction proportionings：72 88 parts of clear water, 1 part of potassium chloride, 10 26 parts of sodium chloride, 0.02 0.05 parts of sodium sulfite, contract swollen dose 0.5 1 parts, 0.1 0.2 parts of polyoxyethylene sorbitan monoleate, 12 parts of xanthans.Preparation method step 1, the sodium chloride saturated solution for being 26% with clear water preparation mass percent, the heavy weight additive mother liquor as regulation workover fluid density；Step 2, a small amount of clear water dilution is added in sodium chloride heavy weight additive mother liquor, sequentially add potassium chloride, sodium sulfite, swollen dose of contracting, often plus a kind of material stirs 10 minutes, adds enough clear water to the density of workover fluid requirement；Step 3, the solution prepared with the filtering step 2 of a diameter of 5 μm of filter membrane, obtain a kind of swollen type Solid Free workover fluid that contracts.The workover fluid can shrink reservoir pore throat clay mineral, pore throat becomes big, effective permeability rise.
Description
Technical field
The present invention relates to the Oilfield Chemicals used in a kind of construction of petroleum gas oil producing operation, particularly a kind of contracting
Swollen type Solid Free workover fluid and preparation method thereof.
Background technology
Workover treatment be maintenance or improve oil-production capacity maintenance measure, the work used when workover fluid is workover treatment
Liquid, the performance of workover fluid directly influence production capacity recovery effects after workover treatment.Oil field is typically using clear water, stratum water or inorganic
Salting liquid is as workover fluid, but clear water and reservoir compatibility are poor, and clay mineral aquation, expansion easily occurs, blocks reservoir, reduction has
Effect permeability simultaneously influences production capacity.
Contract swollen dose and be generally used for de-plugging operation, CN103409131A [P] is related to a kind of Swelled-clay shrinking agent for plug removal and its preparation side
Method and application, it is made of PDDA, potassium chloride and ammonium chloride compounding, for the de-plugging of water injection well,
It is used cooperatively with acid solution；CN105623636A [P] is related to Swelling-resistant shrinking and swelling agent, its preparation method and its application, using quaternary amines sun
Ionomer, inorganic salts, sulfamic acid compounding are made, and can compress clay electric double layer, release clay fraction lattice watter and suction
Attached water, so as to prevent reservoir water blocking damage.
Solid Free workover fluid can avoid blocking injury of the solid phase particles to reservoir, and Zhang Fengying have developed a kind of new nothing and consolidate
Phase workover fluid,《Chinese offshore oil and gas》2010, Vol.22No.2, obtained in refined carat-big flooded dam gas condensate field workover treatment
Success；CN105176506A [P] is related to a kind of acid salt Solid Free Midst density workover fluid and its compound method, workover fluid component
Including clear water, sodium dihydrogen phosphate, neopelex, corrosion inhibiter, without solid-phase component, with same density formates Solid Free
Well workover liquid system, which is compared, reduces cost more than 20%.Patent EP1128021 disclosed in TEXAS UNITED CHEMICAL CORP
(A2)【P】The Solid Free viscous fluid for well workover and completion practice, component include different molecular weight polyethylene glycol and can
Molten bromide, for balancing the static pressure of formation pore fluid.
The investigation situation of open report is shown, the research and application for the swollen performance that contracted to well workover liquid system are there is no, in order to carry
Oil-production capacity after high workover treatment, shorten operation and recover the cycle, it is necessary to the swollen type well workover liquid system of research and development contracting.、
The content of the invention
Because workover fluid enters reservoir when the present invention is in order to solve workover treatment, swelling clay mineral, scattered, pore throat are caused
The problem of becoming tiny, permeability decrease, the present invention one are to provide that one kind shrinks reservoir pore throat clay mineral, pore throat becomes big, have
Imitate the elevated swollen type Solid Free workover fluid of contracting of permeability；Two are to provide a kind of preparation method for the swollen type Solid Free workover fluid that contracts.
The technical solution adopted by the present invention is：
The swollen type Solid Free workover fluid of one kind contracting, is made up of the component of following quality proportionings：Clear water 72-88 parts, potassium chloride 1
Part, sodium chloride 10-26 parts, sodium sulfite 0.02-0.05 parts, swollen dose of 0.5-1 part of contracting, polyoxyethylene sorbitan monoleate 0.1-0.2 parts, xanthan
Glue 1-2 parts.
76 parts of clear water, 1 part of potassium chloride, 20 parts of sodium chloride, 0.05 part of sodium sulfite, contract swollen dose 1 part, polyoxyethylene sorbitan monoleate 0.2
Part, 2 parts of xanthans.
88 parts of clear water, 1 part of potassium chloride, 10 parts of sodium chloride, 0.02 part of sodium sulfite, contract swollen dose 1 part, polyoxyethylene sorbitan monoleate 0.1
Part, 1 part of xanthans.
The component composition for the swollen dose of following quality proportionings of use that contract：Cation quaternary ammonium salt 50-70 parts, nonionic surfactant
20-30 parts and organosilyl surface 1-8 parts compounding form.
The component composition for the swollen dose of following quality proportionings of use that contract：50 parts of cation quaternary ammonium salt, nonionic surfactant 30
Part and 1 part of compounding of organosilyl surface form.
A kind of preparation method for the swollen type Solid Free workover fluid that contracts, comprises the following steps：
Step 1, the sodium chloride saturated solution for being 26% with clear water preparation mass percent, as regulation workover fluid density
Heavy weight additive mother liquor；
Step 2, add in sodium chloride heavy weight additive mother liquor a small amount of clear water dilution, sequentially add potassium chloride, sodium sulfite,
Contract swollen dose, often plus a kind of material stirs 10 minutes, adds enough clear water to the density of workover fluid requirement；
Step 3, the solution prepared with the filtering step 2 of a diameter of 5 μm of filter membrane, a kind of swollen type that contracts is obtained without solid
Phase workover fluid.
It is an advantage of the invention that：
1st, workover fluid of the present invention can shrink reservoir pore throat clay mineral, and pore throat becomes big or forms new capillary channel,
Effective permeability raises.
2nd, workover fluid of the present invention can loosen the clay lattice of the water containing absorption, the adsorbed hydrone of abjection, make to cause suction
Water swellable clay particle volume contraction.Cation quaternary ammonium salt aquation therein can be less than monovalence, divalent inorganic cations in water
Such as Na+、Ca2+Deng aquation energy, can be adsorbed prior to inorganic cation on clay, promote clay particle to deviate from brilliant intermediary water,
Close lattice structure is formed, effectively suppresses aquation, the expansion of clay.Intergranular pores larynx becomes big or forms new capillary channel,
Effective permeability raises.Succeeded application in wells such as high 180X5, high 65-13, high 65-14, there is not oil production after pump detection and workover
With the increase of amplitude.
3rd, rock core carries out electron-microscope scanning before and after being soaked to workover fluid of the present invention, the results showed that, rock core end face hole is not soaked
A diameter of 38 microns, immersion rear end face pore diameter is 84 microns, and rock core pore diameter has increased about 1.2 after immersion
Times, show that the swollen type Solid Free well workover liquid energy of the contracting effectively increases pore throat.
Brief description of the drawings
Fig. 1 be the embodiment of the present invention high 180X5 wells pump detection and workover before and after production curve figure.
Fig. 2 is that the high 65-13 wells of the embodiment of the present invention turn to take out production curve figure before and after operation.
Fig. 3 is that the high 65-14 wells of the embodiment of the present invention turn to take out production curve figure before and after operation.
Fig. 4 is swollen dose of contracting and the Supreme People's Procuratorate 5-44 rock core flowing experiment curve maps.
Fig. 5 is the rock core end face electromicroscopic photograph before workover fluid immersion.
Fig. 6 is the rock core end face electromicroscopic photograph after workover fluid immersion.
Embodiment
With reference to Fig. 1-6 specific embodiments, the present invention will be further described.
One kind can shrink reservoir pore throat clay mineral, pore throat becomes big, the elevated swollen type Solid Free of contracting of effective permeability
Workover fluid and preparation method thereof.
The swollen type Solid Free workover fluid of one kind contracting, is made up of the component of following quality proportionings：Clear water 72-88 parts, potassium chloride 1
Part, sodium chloride 10-26 parts, sodium sulfite 0.02-0.05 parts, swollen dose of 0.5-1 part of contracting, polyoxyethylene sorbitan monoleate 0.1-0.2 parts, xanthan
Glue 1-2 parts.
76 parts of clear water, 1 part of potassium chloride, 20 parts of sodium chloride, 0.05 part of sodium sulfite, contract swollen dose 1 part, polyoxyethylene sorbitan monoleate 0.2
Part, 2 parts of xanthans.
88 parts of clear water, 1 part of potassium chloride, 10 parts of sodium chloride, 0.02 part of sodium sulfite, contract swollen dose 1 part, polyoxyethylene sorbitan monoleate 0.1
Part, 1 part of xanthans.
The component composition for the swollen dose of following quality proportionings of use that contract：Cation quaternary ammonium salt 50-70 parts, nonionic surfactant
20-30 parts and organosilyl surface 1-8 parts compounding form.
The component composition for the swollen dose of following quality proportionings of use that contract：50 parts of cation quaternary ammonium salt, nonionic surfactant 30
Part and 1 part of compounding of organosilyl surface form.
A kind of preparation method for the swollen type Solid Free workover fluid that contracts, comprises the following steps：
Step 1, the sodium chloride saturated solution for being 26% with clear water preparation mass percent, as regulation workover fluid density
Heavy weight additive mother liquor；
Step 2, add in sodium chloride heavy weight additive mother liquor a small amount of clear water dilution, sequentially add potassium chloride, sodium sulfite,
Contract swollen dose, often plus a kind of material stirs 10 minutes, adds enough clear water to the density of workover fluid requirement；
Step 3, the solution prepared with the filtering step 2 of a diameter of 5 μm of filter membrane, a kind of swollen type that contracts is obtained without solid
Phase workover fluid.
Embodiment 1
Material prepares：88 parts of clear water, 1 part of potassium chloride, 10 parts of sodium chloride, 0.02 part of sodium sulfite, contract swollen dose 1 part, poly- mountain
80 0.1 parts of pear ester, 1 part of xanthans.
It is prepared by workover fluid：Clear water is added in container, potassium chloride, sodium sulfite, swollen dose of contracting is sequentially added, often adds a kind of material
Material stirring 10 minutes, the solution then prepared with the filter filtering of a diameter of 5 μm of filter membrane, you can.
Test well 1：In high 180X5 wells application.High 180X5 wells are high 14 fault block a bite oil well, and thickened-oil pump is missed, to recover
The well production, determine using the swollen type Solid Free workover fluid inspection pump that contracts.
This inspection pump of high 180X5 wells uses density 1.01g/cm3The swollen side of type Solid Free workover fluid 45 of contracting, examine pump before produce daily
The side of liquid 2.00, day 1.97 tons of oil-producing, aqueous 1.5%, examine and produce the side of liquid 3.9 after pump daily, day 3.88 tons of oil-producing, aqueous 0.5%, well workover
Liquid not only effectively protects reservoir, and Liquid output, oil production are also substantially increased, and illustrates that contracting of the workover fluid to Clay Mineral is swollen
It is functional, pore throat is increased, improves the effective permeability of fluid.
Embodiment 2
Material prepares：80 parts of clear water, 1 part of potassium chloride, 13 parts of sodium chloride, 0.02 part of sodium sulfite, contract swollen dose 1 part, poly- mountain
80 0.1 parts of pear ester, 1 part of xanthans.
It is prepared by workover fluid：The sodium chloride saturated solution that mass percent is 26% is prepared with clear water, as regulation workover fluid
The heavy weight additive mother liquor of density；A small amount of clear water dilution is added in sodium chloride heavy weight additive mother liquor, sequentially adds potassium chloride, sulfurous acid
Sodium, swollen dose of contracting, often plus a kind of material stirs 10 minutes, the solution then prepared with the filter filtering of a diameter of 5 μm of filter membrane,
.
Test well 2：In high 65-13 wells application.High 65-13 wells are high 65 fault block a bite oil well, and 2 millimeters of oil nozzle blowings are given birth to
Production, i.e., by stop-spraying, determine to turn pumping production using swollen type Solid Free workover fluid operation of contracting.
This turn of high 65-13 wells is taken out using density 1.10g/cm3The swollen side of type Solid Free workover fluid 150 of contracting, blowing time
Liquid 2.1 side, 2.08 tons of day oil-producing, aqueous 0.8% are produced, turns to take out and produces the side of liquid 3.12,2.99 tons of day oil-producing, aqueous after operation daily
4.1%, workover fluid not only effectively protects reservoir, and Liquid output, oil production are also significantly gone up, and illustrates the workover fluid to reservoir clay
The contracting of mineral is swollen functional, increases pore throat, improves the effective permeability of fluid.
Embodiment 3
Density 1.00g/cm3Workover fluid material prepares：Prepare with material in embodiment 1.
Density 1.00g/cm3It is prepared by workover fluid：With preparation method in embodiment 1.
Density 1.15g/cm3Workover fluid material prepares：Potassium chloride, 1%；Sodium chloride, 20%；Sodium sulfite, 0.02%；Contracting
Swollen dose, 1%；Remaining is clear water, and each component mass percent sum is absolutely.
Material prepares：76 parts of clear water, 1 part of potassium chloride, 20 parts of sodium chloride, 0.05 part of sodium sulfite, contract swollen dose 1 part, poly- mountain
80 0.2 parts of pear ester, 2 parts of xanthans.
Density 1.00g/cm3It is prepared by workover fluid：The sodium chloride saturated solution that mass percent is 26% is prepared with clear water, is made
To adjust the heavy weight additive mother liquor of workover fluid density；A small amount of clear water dilution is added in sodium chloride heavy weight additive mother liquor, is sequentially added
Potassium chloride, sodium sulfite, swollen dose of contracting, often plus a kind of material stirs 10 minutes, is then filtered with the filter of a diameter of 5 μm of filter membrane
The solution prepared, you can.
Test well 3：In high 65-14 wells application.High 65-14 wells are high 65 fault block a bite oil well, and 5 millimeters of oil nozzle blowings are given birth to
Production, i.e., by stop-spraying, determine to turn pumping production using swollen type Solid Free workover fluid operation of contracting.
This turn of high 65-14 wells is taken out using density 1.00g/cm3Contract the swollen side of type Solid Free workover fluid 75, uses 1.15g/cm3
Contract the swollen side of type Solid Free workover fluid 240, altogether using the side of workover fluid 315.Produce liquid 7.4 side, 7.3 tons of day oil-producing, aqueous during blowing daily
1.3%, turn to produce the side of liquid 9.2,9.15 tons of day oil-producing, aqueous 0.5% daily after taking out operation, workover fluid not only effectively protects reservoir,
Liquid output, oil production are also significantly gone up, and are illustrated that contracting of the workover fluid to Clay Mineral is swollen functional, are increased pore throat,
Improve the effective permeability of fluid.
Disclosed above is only the specific embodiment of the present invention, although the present invention is disclosed as above with preferred embodiment,
The present invention is not limited to this, the changes that any person skilled in the art can think of, is not departing from the design philosophy of the present invention
In scope, various changes and retouching are carried out to the present invention, should all be fallen within the scope and spirit of the invention.
Experimental conditions
1. permeability resume figure is tested
Flowing experiment is carried out to the Supreme People's Procuratorate 5-44 wells rock core with the contracting swollen type Solid Free workover fluid, initial oleic permeability is
110.6mD, reverse displacement 2PV workover fluids, oleic permeability increase is 151mD, permeability resume figure 137%, shows the contracting
Swollen type Solid Free workover fluid can increase the percolation ability of rock core.
2. the swollen rate experiment of contracting
0.50g bentonites and 9mL distilled water are added in 10mL centrifuge tubes, 4h is stood at room temperature, 2000r/min's
10min is centrifuged under rotating speed, reads bentonite volume after hydration swelling, adds density 1.01g/cm3The swollen type Solid Free well workover of contracting
Liquid, 4h is stood after shaking up at room temperature, is centrifuged under the same conditions, read bentonite volume, calculated volume-diminished rate, as a result see
Table 1.The well workover liquid energy significantly reduces the clay volume after hydration swelling, and the swollen rate that contracts reaches 80% or so.
The contract swollen type Solid Free workover fluid of table 1 contracts swollen rate experimental result
3. workover fluid immersion rock core end face electron-microscope scanning
Rock core carries out electron-microscope scanning before and after being soaked to workover fluid, the results showed that, rock core end face hole a diameter of 38 is not soaked
Microns, immersion rear end face pore diameter is 84 microns, and rock core pore diameter has increased about 1.2 times after immersion, shows this
The swollen type Solid Free well workover liquid energy that contracts effectively increases pore throat.
Claims (6)
- The swollen type Solid Free workover fluid 1. one kind contracts, it is characterised in that the component composition of following mass fraction proportionings：Clear water 72-88 Part, 1 part of potassium chloride, sodium chloride 10-26 parts, sodium sulfite 0.02-0.05 parts, swollen dose of 0.5-1 part of contracting, polyoxyethylene sorbitan monoleate 0.1- 0.2 part, xanthans 1-2 parts.
- 2. a kind of swollen type Solid Free workover fluid that contracts as claimed in claim 1, it is characterised in that component is by mass fraction with such as Under：76 parts of clear water, 1 part of potassium chloride, 20 parts of sodium chloride, 0.05 part of sodium sulfite, contract swollen dose 1 part, 0.2 part of polyoxyethylene sorbitan monoleate is yellow 2 parts of virgin rubber.
- A kind of 3. swollen type Solid Free workover fluid that contracts as claimed in claim 1, it is characterised in that 88 parts of clear water, 1 part of potassium chloride, 10 parts of sodium chloride, 0.02 part of sodium sulfite, contract swollen dose 1 part, 0.1 part of polyoxyethylene sorbitan monoleate, 1 part of xanthans.
- 4. a kind of swollen type Solid Free workover fluid that contracts as claimed in claim 1, it is characterised in that the swollen dose of following quality of use of contracting are matched somebody with somebody The component composition of ratio：Cation quaternary ammonium salt 50-70 parts, nonionic surfactant 20-30 parts and organosilyl surface 1-8 parts compounding Form.
- 5. a kind of swollen type Solid Free workover fluid that contracts as claimed in claim 1, it is characterised in that the swollen dose of following quality of use of contracting are matched somebody with somebody The component composition of ratio：1 part of 50 parts of cation quaternary ammonium salt, 30 parts of nonionic surfactant and organosilyl surface compounding form.
- 6. the preparation method of a kind of swollen type Solid Free workover fluid that contracts as claimed in claim 1, it is characterised in that including following step Suddenly：Step 1, the sodium chloride saturated solution for being 26% with clear water preparation mass percent, the exacerbation as regulation workover fluid density Agent mother liquor；Step 2, a small amount of clear water dilution is added in sodium chloride heavy weight additive mother liquor, it is swollen to sequentially add potassium chloride, sodium sulfite, contracting Agent, often plus a kind of material stirs 10 minutes, adds enough clear water to the density of workover fluid requirement；Step 3, the solution prepared with the filtering step 2 of a diameter of 5 μm of filter membrane, obtain a kind of swollen type Solid Free that contracts and repair Well liquid.
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| CN113698920A (en) * | 2020-05-21 | 2021-11-26 | 中国石油天然气股份有限公司 | Solid-free workover fluid and preparation method and application thereof |
| CN116042193A (en) * | 2021-10-28 | 2023-05-02 | 中国石油天然气集团有限公司 | Inverse-emulsion solid-free completion fluid and preparation method and application thereof |
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| CN102533232A (en) * | 2010-12-13 | 2012-07-04 | 中国石油天然气股份有限公司 | Solid-phase-free multi-functional well completion working solution |
| CN103965844A (en) * | 2013-01-30 | 2014-08-06 | 中国石油天然气股份有限公司 | Low-density microbubble workover fluid |
| CN104531108A (en) * | 2014-12-09 | 2015-04-22 | 西南石油大学 | Solid phase-free foam workover fluid, preparation method and uses thereof |
| CN105176506A (en) * | 2015-09-15 | 2015-12-23 | 中国石油天然气集团公司 | Acid-salt solid-phase-free medium-density workover fluid and preparation method thereof |
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| CN113698920A (en) * | 2020-05-21 | 2021-11-26 | 中国石油天然气股份有限公司 | Solid-free workover fluid and preparation method and application thereof |
| CN116042193A (en) * | 2021-10-28 | 2023-05-02 | 中国石油天然气集团有限公司 | Inverse-emulsion solid-free completion fluid and preparation method and application thereof |
| CN116042193B (en) * | 2021-10-28 | 2024-04-30 | 中国石油天然气集团有限公司 | Inverse-emulsion solid-free completion fluid and preparation method and application thereof |
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