CN106566504B - In a kind of fanout free region and acid oil, well de-plugging agent and its use technique - Google Patents
In a kind of fanout free region and acid oil, well de-plugging agent and its use technique Download PDFInfo
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- CN106566504B CN106566504B CN201610890291.5A CN201610890291A CN106566504B CN 106566504 B CN106566504 B CN 106566504B CN 201610890291 A CN201610890291 A CN 201610890291A CN 106566504 B CN106566504 B CN 106566504B
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- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 100
- 239000002253 acid Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 11
- 229910001868 water Inorganic materials 0.000 claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 claims abstract description 29
- 238000002347 injection Methods 0.000 claims abstract description 17
- 239000007924 injection Substances 0.000 claims abstract description 17
- LNOPIUAQISRISI-UHFFFAOYSA-N n'-hydroxy-2-propan-2-ylsulfonylethanimidamide Chemical compound CC(C)S(=O)(=O)CC(N)=NO LNOPIUAQISRISI-UHFFFAOYSA-N 0.000 claims abstract description 16
- 235000010288 sodium nitrite Nutrition 0.000 claims abstract description 14
- HIWVFNVUJDPDKS-UHFFFAOYSA-N 1-octadecylpyridin-1-ium Chemical compound CCCCCCCCCCCCCCCCCC[N+]1=CC=CC=C1 HIWVFNVUJDPDKS-UHFFFAOYSA-N 0.000 claims abstract description 10
- 230000031709 bromination Effects 0.000 claims abstract description 10
- 238000005893 bromination reaction Methods 0.000 claims abstract description 10
- IJCWFDPJFXGQBN-RYNSOKOISA-N [(2R)-2-[(2R,3R,4S)-4-hydroxy-3-octadecanoyloxyoxolan-2-yl]-2-octadecanoyloxyethyl] octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OC[C@@H](OC(=O)CCCCCCCCCCCCCCCCC)[C@H]1OC[C@H](O)[C@H]1OC(=O)CCCCCCCCCCCCCCCCC IJCWFDPJFXGQBN-RYNSOKOISA-N 0.000 claims abstract description 9
- 239000001589 sorbitan tristearate Substances 0.000 claims abstract description 9
- 229960004129 sorbitan tristearate Drugs 0.000 claims abstract description 9
- 235000011078 sorbitan tristearate Nutrition 0.000 claims abstract description 9
- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 claims abstract description 6
- 239000012530 fluid Substances 0.000 claims description 51
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 11
- 238000006073 displacement reaction Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 7
- -1 polyoxy Polymers 0.000 claims description 4
- 238000013019 agitation Methods 0.000 claims description 3
- 239000003814 drug Substances 0.000 claims description 3
- 150000001298 alcohols Polymers 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 150000001336 alkenes Chemical class 0.000 claims 1
- 125000005233 alkylalcohol group Polymers 0.000 abstract description 6
- 230000015572 biosynthetic process Effects 0.000 abstract description 6
- 229940051841 polyoxyethylene ether Drugs 0.000 abstract description 6
- 229920000056 polyoxyethylene ether Polymers 0.000 abstract description 6
- 230000000903 blocking effect Effects 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 3
- 239000003129 oil well Substances 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 27
- 238000004519 manufacturing process Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 11
- 239000012752 auxiliary agent Substances 0.000 description 5
- 241000894007 species Species 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 229910019142 PO4 Inorganic materials 0.000 description 4
- 238000011010 flushing procedure Methods 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 239000010452 phosphate Substances 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 159000000000 sodium salts Chemical class 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000004927 clay Substances 0.000 description 3
- 239000002734 clay mineral Substances 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 2
- 229910004039 HBF4 Inorganic materials 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 2
- 150000001335 aliphatic alkanes Chemical class 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000008092 positive effect Effects 0.000 description 2
- IIACRCGMVDHOTQ-UHFFFAOYSA-N sulfamic acid Chemical compound NS(O)(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-N 0.000 description 2
- MXHIGKGEMKDYSY-UHFFFAOYSA-N B(O)(O)O.[O].[F] Chemical compound B(O)(O)O.[O].[F] MXHIGKGEMKDYSY-UHFFFAOYSA-N 0.000 description 1
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 1
- PSDYQSWHANEKRV-UHFFFAOYSA-N [S]N Chemical compound [S]N PSDYQSWHANEKRV-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000003190 augmentative effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000005341 cation exchange Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 230000000855 fungicidal effect Effects 0.000 description 1
- 239000000417 fungicide Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000011499 joint compound Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- WBHQBSYUUJJSRZ-UHFFFAOYSA-M sodium bisulfate Chemical compound [Na+].OS([O-])(=O)=O WBHQBSYUUJJSRZ-UHFFFAOYSA-M 0.000 description 1
- 229910000342 sodium bisulfate Inorganic materials 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- IIACRCGMVDHOTQ-UHFFFAOYSA-M sulfamate Chemical compound NS([O-])(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-M 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 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
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)
- Fire-Extinguishing Compositions (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
With acid oil, well de-plugging agent in a kind of fanout free region, 1 is pressed by A agent prescriptions and B agent prescriptions:1 volume ratio is formed, and A agent prescriptions are sulfamic acid 10 20%, fluoboric acid 2 4%, polyoxyethylated alkyl alcohol organic phosphate disodium salt 1 2%, bromination octadecylpyridinium 2 3%, surplus are that the sum of clear water, above prescription mass percent is 100%；B agent prescriptions are：Sodium nitrite 10 20%, sorbitan tristearate polyoxyethylene ether 2 4%, surplus are that the sum of clear water, above prescription mass percent is 100%.The invention also discloses the use technique of above-mentioned de-plugging agent.In fanout free region of the present invention and acid oil, well de-plugging agent, be one kind without mud acid de-plugging agent, one-stop operation can release the blocking of oil well or the simultaneous organic species of water injection well and inorganic species, it is environmentally safe, to formation skeleton fanout free region, the defects of avoiding pollution and grievous hurt of the mud acid to stratum and environment.
Description
Technical field
The present invention relates to oil, well block releasing technique field, is related in a kind of fanout free region and acid oil, well de-plugging agent, this hair
It is bright to further relate in above-mentioned fanout free region and acid oil, the use technique of well de-plugging agent.
Background technology
Oil field in the process of development, in order to achieve the purpose that stable yields is increased production, need to drill two kinds of well type：One kind is oil-producing well,
One kind is water injection well；Oil-producing well is to be used to produce crude oil from stratum, and long-term recovery process can cause stratum energy in debt, production
Oil mass declines or without yield, in order to supplement stratum energy, with oil well oil-producing formation unicom around at a certain distance from drill water filling
Well, injects stratum by treated clear water, increases the pressure and energy supply of oil-producing formation；Oil-producing well and water injection well can be produced often
Raw contamination and plugging, analyzes from Producing reason, in drilling well, well cementation, pilot production, well workover, various measure operations, can produce different journeys
The pollution damage of degree；From the chemistry analysis of tamper, two major classes are summarized as：One kind is the organic matters such as wax, colloid, asphalitine
Class blocks, and another kind is that the inorganic species such as the iron oxide, rock debris, argillaceous sandstone of solid phase particles state block；Oil-water well produces
Blocking is given birth to, it is necessary to carry out de-plugging operation, just can guarantee that normal production, routine de-plugging agent is with hydrochloric acid+hydrofluoric acid abbreviation at present
Mud acid is host agent, then adds various auxiliary agents, is configured to self-generating mud-acid, micella acid, buffer regulated HF acid, MH acid, Strong oxdiative acid, foam
Ten several prescriptions such as acid, emulsified acid, phosphoric acid, mud acid prescription play indispensable effect, de-plugging effect in breaking block treatment is acidified
Fruit is also more significant.
Over time, in mud acid strong acid effect, caused by environmental pollution and the grievous hurt to formation skeleton, with
And the negative interaction of increasing yield and injection positive effect decline is used for multiple times, cause related technical staff, the extensive dispute of expert leader
And great attention, a kind of good plugging removal effect, fanout free region, the new formula of environment-friendly type are created, is that the urgent of people is pursued and extensively
Common recognition.
The content of the invention
The object of the present invention is to provide, with acid oil, well de-plugging agent, solve conventional acidulation de-plugging agent in a kind of fanout free region
Using hydrochloric acid as the environmental pollution caused by host agent, the grievous hurt to formation skeleton, and increasing yield and injection positive effect is used for multiple times
The problem of decline.
It is a further object of the present invention to provide the use technique in above-mentioned fanout free region with acid oil, well de-plugging agent.
To achieve these goals, technical solution of the present invention is：
With acid oil, well de-plugging agent in a kind of fanout free region, 1 is pressed by A agent prescriptions and B agent prescriptions:1 volume ratio is formed；
The mass percentage composition of wherein A agent prescriptions is：Sulfamic acid 10-20%, fluoboric acid 2-4%, polyoxyethylene alkane
Base alcohol ether organic phosphate disodium salt 1-2%, bromination octadecylpyridinium 2-3%, surplus are clear water, above prescription mass percent it
With for 100%；
The mass percentage composition of wherein B agent prescriptions is：Sodium nitrite 10-20%, sorbitan tristearate gather
Ethylene oxide ether 2-4%, surplus are that the sum of clear water, above prescription mass percent is 100%.
The features of the present invention also resides in,
The mass ratio of sulfamic acid and sodium nitrite is 1:1.
Another technical solution of the present invention is, in a kind of fanout free region and acid oil, the use technique of well de-plugging agent,
Specifically implement according to the following steps：
Step 1, the medicament in A agent prescriptions and B agent prescriptions is weighed in proportion, is respectively put under room temperature in Agitation Tank, is injected
Clear water, stirs evenly, that is, obtains A agent treatment fluid and B agent treatment fluids；
Step 2, according to the order of A agent treatment fluid → insulating liquid → B agent treatment fluid → displacement fluid, injection need de-plugging oil,
In well, when closing well reaction 4 is small, that is, de-plugging operation is completed.
The features of the present invention also resides in,
Insulating liquid and displacement fluid are clear water in step 2.
The invention has the advantages that in a kind of fanout free region and acid oil, well de-plugging agent, one-stop operation can release oil well or
The blocking of the simultaneous organic species of water injection well and inorganic species, to formation skeleton fanout free region, term of validity length, can be acidified deeper
The characteristics of remote stratum；Compared with using mud acid as the conventional de-plugging agent of host agent, both with expanded hole porosity, increase permeability, releasing
Block, the effect of augmented injection volume increase, and be avoided that pollution and grievous hurt of the mud acid to stratum and environment, while it is residual to it also avoid residual acid
Slag returns row and is not thorough, secondary the defects of blocking oil stream duct and causing the invalid or term of validity short.
Embodiment
The present invention is further illustrated below by specific embodiment；
In a kind of fanout free region and acid deblocking agent, 1 is pressed by A agent prescriptions and B agent prescriptions:1 volume ratio is formed.
The mass percentage composition of wherein A agent prescriptions is：Sulfamic acid 10-20%, fluoboric acid 2-4%, polyoxyethylene alkane
Base alcohol ether organic phosphate disodium salt 1-2%, bromination octadecylpyridinium 2-3%, surplus are clear water, above prescription mass percent it
With for 100%.
The mass percentage composition of wherein B agent prescriptions is：Sodium nitrite 10-20%, sorbitan tristearate gather
Ethylene oxide ether 2-4%, surplus are that the sum of clear water, above prescription mass percent is 100%.
The mass ratio of sulfamic acid and B agent prescription Sodium Nitrites is 1 in A agent prescriptions:1.
In above-mentioned fanout free region and the use technique of sour plug removal in oil and water well agent is：
The above-mentioned medicament being respectively formulated is transported to well site, puts 2m into proportion at normal temperatures3In Agitation Tank, it is proportionally added into clear
Water blender is miscible be uniformly configured to treatment fluid both can, a small amount of particle can be contained in treatment fluid, side can use cement at the same time with liquid
Overall height is pressed into pit shaft, when closing well reaction 4 is small after, carry out well-flushing, thoroughly the row's of returning raffinate residue to well head or be directly transferred to production.
Treatment fluid injection order be：A agent treatment fluid → insulating liquid (clear water) → B agent treatment fluid → displacement fluid (clear water), place
Liquid total injection rate is managed depending on treatment radius and processing well section thickness, with reference to calculation formula V=π R2H Φ are calculated, and V is in formula
Treatment fluid dosage, π 3.14, R are plug removal radius, and h is reservoir thickness, and Φ is oil reservoir porosity, is increased when chocking-up degree is serious
Treatment fluid concentration.
Fixed tubular column operation：Treatment fluid is squeezed into stratum from oil pipe or oil jacket annular space using original production tubing string, is suitable for
Individual layer and the plug removal in oil and water well not shaked out.
Dynamic tubing string operation：Original production tubing string need to be proposed, again the special acidifying tubing string of tripping in, suitable for multilayer and shaked out tight
Weight, need to be layered the oil-water well of de-plugging.
The technical principle of the present invention is：
The wherein technical principle of A agent prescriptions：A agent prescriptions are by host agent sulfamic acid, auxiliary agent fluoboric acid, polyxyethylated alcohol
Ether phosphate disodium salt, bromination octadecylpyridinium composition；Host agent sulfamic acid (NH2SO3H), it is a kind of pulverulent solids acid,
Water slow mechanism dissolved is met, is blocked for releasing inorganic species, it can be with ferrous sulfide (FeS), iron oxide in pit shaft and stratum
(Fe2O3), calcium carbonate (CaCO3) the water-soluble sulfamate of reaction generation；Auxiliary agent fluoboric acid (HBF4), can slowly it hydrolyze
Reaction generation hydrofluoric acid and fluorine oxygen boric acid, its reaction process：HBF4+H2O→HBF3(OH)+HF, has stronger dissolving clay
Grain ability, fluoboric acid is by that to aluminum ions dissolving in clay mineral, can reduce the cation exchange capacity (CEC) of clay mineral, make
Clay is passivated, and is reduced the expansion of clay mineral, is prevented from damaging stratum；The combination of sulfamic acid and fluoboric acid, with mud acid
Formula is compared, this formula had not only played the acidizing effect of mud acid, but also had circulation expansion duct, and term of validity length, corrosivity is small, energy
The more far-reaching stratum of acidifying, construction safety, storage and transport simplify the advantages that facilitating.
Auxiliary agent polyoxyethylated alkyl alcohol organic phosphate disodium salt, is a kind of foaming agent, emulsifying agent, oil displacement agent, can be by stratum
Viscous crude dissolving emulsification in water, reduces surface tension, reduces oil migration resistance, improve permeability, barbotage is to permeability
It is selective, promote acid solution to avoid acid solution even into high less permeable layer and preferentially enter high permeability zone so that less permeable layer is not
It can be effectively improved, so that the defects of increasing contradiction in interlayer and layer.
Auxiliary agent bromination octadecylpyridinium is a kind of corrosion inhibiter, retardant, fungicide, anti-clayswelling agent, and inhibition is slowly made
With that can extend acidificatoin time, increase is acidified depth, while can kill the saprophytic bacteria in stratum, releases the accumulated plugging of saprophytic bacteria,
Also another effect suppresses clay swell, prevents from causing duct to block.
The wherein technical principle of B agent prescriptions：B agent prescriptions are by sodium nitrite, sorbitan tristearate polyoxyethylene
Ether is prepared, and sodium nitrite has a strong oxidizing property, and aqueous solution is in alkalescence, as neutralization initiator, after stratum is injected with amino sulphur
Acid is reacted, generation dibastic sodium phosphate, nitrogen and water, reaction process：NH2SO3H+NaNO2→NaHSO4+N2+H2O, sulfamic acid
It is 1 with sodium nitrite commodity usage ratio:1, sulfamic acid pH value brings up to 5-6 by 2 after reaction, close to neutrality, reaction process
80-90 DEG C of high temperature of middle generation and a large amount of nitrogen, form a high temperature on stratum and suppress ring, high temperature ring can be by wax and asphalitine shape
Into fouling dissolving, release organic species and block；Suppress ring to bleed off pressure in well head or during cementing truck well-flushing, pressure release, by stratum
Residue, raffinate are counter to be pushed into pit shaft, and gaslift prevents secondary pollution stratum, residue raffinate returns row thoroughly after measure, can prolong to well head
The long de-plugging term of validity.
Embodiment 1
The de-plugging agent of the present embodiment is used for fixed tubular column de-plugging of well, and 1 is pressed by A agent treatment fluid and B agent treatment fluid:1 body
Product is than forming, A agent treatment fluid dosages 11m3, B agent treatment fluid dosages 11m3.The total dosage for the treatment of fluid is designed as 22m3。
Wherein A agent prescriptions mass concentration is：Sulfamic acid 10%, fluoboric acid 3%, polyoxyethylated alkyl alcohol phosphate two
Sodium salt 2%, bromination octadecylpyridinium 2%, mass concentration add up to 17%, and surplus is clear water.
Wherein B agent prescriptions mass concentration is：Sodium nitrite 10%, sorbitan tristearate polyoxyethylene ether 2%,
Mass concentration 12%, surplus are clear water.
Implementation steps：Cementing truck high-pressure outlet is connected with valve of well, treatment fluid order, A agent are squeezed into well
11m3→ insulating liquid 5m3→ B agent 11m3→ displacement fluid 15m3Start production is transferred to after when → closing well reaction 4 is small.
Field conduct effect：Compared with before measure, daily fluid production rate increase 2.3m3, daily oil production increase 1.4t.
Embodiment 2
The de-plugging agent of the present embodiment is used for fixed tubular column de-plugging of well, and 1 is pressed by A agent treatment fluid and B agent treatment fluid:1 body
Product is than forming, A agent treatment fluid dosages 16m3, B agent treatment fluid dosages 16m3, the total dosage for the treatment of fluid is designed as 32m3。
Wherein A agent prescriptions mass concentration is：Sulfamic acid 13%, fluoboric acid 2%, polyoxyethylated alkyl alcohol phosphate two
Sodium salt 1%, bromination octadecylpyridinium 3%, mass concentration add up to 19%, and surplus is clear water.
Wherein B agent prescriptions mass concentration is：Sodium nitrite 13%, sorbitan tristearate polyoxyethylene ether 3%,
Mass concentration 16%, surplus are clear water.
Implementation steps：Cementing truck high-pressure outlet is connected with valve of well, treatment fluid order, A agent are squeezed into well
16m3→ insulating liquid 8m3→ B agent 16m3→ displacement fluid 16m3Start production is transferred to after when → closing well reaction 4 is small.
Field conduct effect：Compared with before measure, daily fluid production rate increase 2.8m3, daily oil production increase 1.5t.
Embodiment 3
The de-plugging agent of the present embodiment is used to move tubing string water injection well de-plugging, and 1 is pressed by A agent treatment fluid and B agent treatment fluid:1 body
Product is than forming, A agent treatment fluid dosages 15m3, B agent treatment fluid dosages 15m3, the total dosage for the treatment of fluid is designed as 30m3。
Wherein A agent prescriptions mass concentration is：Sulfamic acid 18%, fluoboric acid 4%, polyoxyethylated alkyl alcohol phosphate two
Sodium salt 1%, bromination octadecylpyridinium 3%, mass concentration add up to 26%, and surplus is clear water.
Wherein B agent prescriptions mass concentration is：Sodium nitrite 18%, sorbitan tristearate polyoxyethylene ether 4%,
Mass concentration 22%, surplus are clear water.
Implementation steps：It is proposed flow string, tripping in acidifying tubing string, cementing truck high-pressure outlet and wellhead of water injection well valve are connected
Connect, treatment fluid order, A agent 15m are squeezed into well3→ insulating liquid 7m3→ B agent 15m3→ displacement fluid 18m3When → closing well reaction 4 is small
Afterwards → anti-flushing well row's residue raffinate → proposition acidifying tubing string → tripping in flow string, completion stake.
Field conduct effect：Compared with before measure, pressure declines 4.5MPa, and daily water-injection rate is by 0m3Bring up to 20m3, reach
Day match somebody with somebody fluence 20m3Index, the term of validity 15 months.
Embodiment 4
The de-plugging agent of the present embodiment is used to move tubing string water injection well de-plugging, and 1 is pressed by A agent treatment fluid and B agent treatment fluid:1 body
Product is than forming, A agent treatment fluid dosages 20m3, B agent treatment fluid dosages 20m3, the total dosage for the treatment of fluid is designed as 40m3。
Wherein A agent prescriptions mass concentration is：Sulfamic acid 20%, fluoboric acid 4%, polyoxyethylated alkyl alcohol phosphate two
Sodium salt 2%, bromination octadecylpyridinium 2%, mass concentration add up to 28%, and surplus is clear water.
Wherein B agent prescriptions mass concentration is：Sodium nitrite 20%, sorbitan tristearate polyoxyethylene ether 4%,
Mass concentration 24%, surplus are clear water.
Implementation steps：It is proposed flow string, tripping in acidifying tubing string, cementing truck high-pressure outlet and wellhead of water injection well valve are connected
Connect, treatment fluid order, A agent 20m are squeezed into well3→ insulating liquid 10m3→ B agent 20m3→ displacement fluid 25m3The reaction 4 of → closing well is small
When after → anti-flushing well row residue raffinate → proposition acidifying tubing string → tripping in flow string, completion stake.
Field conduct effect：Compared with before measure, pressure declines 3.8MPa, and daily water-injection rate is by 2m3Bring up to 30m3, reach
Day match somebody with somebody fluence 30m3Index, the term of validity 23 months.
Claims (3)
1. in a kind of fanout free region and acid oil, well de-plugging agent, it is characterised in that press 1 by A agent prescriptions and B agent prescriptions:1 volume
Than forming；
The mass percentage composition of wherein A agent prescriptions is：Sulfamic acid 10-20%, fluoboric acid 2-4%, polyxyethylated alcohol
Ether phosphate disodium salt 1-2%, bromination octadecylpyridinium 2-3%, surplus are that the sum of clear water, above prescription mass percent is
100%；
The mass percentage composition of wherein B agent prescriptions is：Sodium nitrite 10-20%, sorbitan tristearate polyoxy second
Alkene ether 2-4%, surplus are that the sum of clear water, above prescription mass percent is 100%；
The mass ratio of the sulfamic acid and sodium nitrite is 1:1.
2. in a kind of fanout free region according to claim 1 and acid oil, the use technique of well de-plugging agent, it is characterised in that
Specifically implement according to the following steps：
Step 1, the medicament in A agent prescriptions and B agent prescriptions is weighed in proportion, is respectively put under room temperature in Agitation Tank, injected clear water,
Stir evenly, that is, obtain A agent treatment fluid and B agent treatment fluids；
Step 2, oil, the well of de-plugging are needed according to the order of A agent treatment fluid → insulating liquid → B agent treatment fluid → displacement fluid, injection
In, when closing well reaction 4 is small, that is, complete de-plugging operation.
3. in a kind of fanout free region according to claim 2 and acid oil, the use technique of well de-plugging agent, it is characterised in that
Insulating liquid described in step 2 and displacement fluid are clear water.
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| CN102775980B (en) * | 2012-07-17 | 2014-07-02 | 大庆井升伟业油田技术服务有限公司 | Acidizing block remover suitable for complex lithologic reservoir |
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