CN106566504A - Non-damage neutralization acid oil and water well plug removal agent and use process thereof - Google Patents
Non-damage neutralization acid oil and water well plug removal agent and use process thereof Download PDFInfo
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- CN106566504A CN106566504A CN201610890291.5A CN201610890291A CN106566504A CN 106566504 A CN106566504 A CN 106566504A CN 201610890291 A CN201610890291 A CN 201610890291A CN 106566504 A CN106566504 A CN 106566504A
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- plugging
- oil
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- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 97
- 239000002253 acid Substances 0.000 title claims abstract description 51
- 229910001868 water Inorganic materials 0.000 title claims abstract description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000006386 neutralization reaction Methods 0.000 title abstract description 5
- 230000008569 process Effects 0.000 title abstract description 3
- 238000002347 injection Methods 0.000 claims abstract description 19
- 239000007924 injection Substances 0.000 claims abstract description 19
- 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 15
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims abstract description 14
- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 claims abstract description 6
- -1 polyoxyethylene Polymers 0.000 claims abstract description 6
- 239000012530 fluid Substances 0.000 claims description 51
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 11
- 238000006073 displacement reaction Methods 0.000 claims description 10
- HIWVFNVUJDPDKS-UHFFFAOYSA-N 1-octadecylpyridin-1-ium Chemical compound CCCCCCCCCCCCCCCCCC[N+]1=CC=CC=C1 HIWVFNVUJDPDKS-UHFFFAOYSA-N 0.000 claims description 9
- 230000031709 bromination Effects 0.000 claims description 9
- 238000005893 bromination reaction Methods 0.000 claims description 9
- 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 description 8
- 239000001589 sorbitan tristearate Substances 0.000 claims description 8
- 229960004129 sorbitan tristearate Drugs 0.000 claims description 8
- 235000011078 sorbitan tristearate Nutrition 0.000 claims description 8
- 238000013019 agitation Methods 0.000 claims description 3
- 239000003814 drug Substances 0.000 claims description 3
- PSDYQSWHANEKRV-UHFFFAOYSA-N [S]N Chemical compound [S]N PSDYQSWHANEKRV-UHFFFAOYSA-N 0.000 claims description 2
- 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 Chemical group 0.000 abstract description 6
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 abstract description 5
- 229920003171 Poly (ethylene oxide) Polymers 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 3
- 239000003129 oil well Substances 0.000 abstract description 3
- 235000010288 sodium nitrite Nutrition 0.000 abstract description 2
- IWHOWMPWLYJUNW-UHFFFAOYSA-N 2-octadecylpyridine Chemical class CCCCCCCCCCCCCCCCCCC1=CC=CC=N1 IWHOWMPWLYJUNW-UHFFFAOYSA-N 0.000 abstract 1
- MOYKHGMNXAOIAT-JGWLITMVSA-N isosorbide dinitrate Chemical compound [O-][N+](=O)O[C@H]1CO[C@@H]2[C@H](O[N+](=O)[O-])CO[C@@H]21 MOYKHGMNXAOIAT-JGWLITMVSA-N 0.000 abstract 1
- 239000005416 organic matter Substances 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 24
- 230000000694 effects Effects 0.000 description 13
- 238000004519 manufacturing process Methods 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 7
- 230000000903 blocking effect Effects 0.000 description 6
- 239000012752 auxiliary agent Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 5
- 239000000203 mixture 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
- 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
- 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
- QYKIQEUNHZKYBP-UHFFFAOYSA-N Vinyl ether Chemical compound C=COC=C QYKIQEUNHZKYBP-UHFFFAOYSA-N 0.000 description 2
- 150000001335 aliphatic alkanes Chemical class 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 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
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000243 solution Substances 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
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000003190 augmentative effect Effects 0.000 description 1
- 239000003899 bactericide agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 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
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 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
- 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
- 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
- 230000001590 oxidative effect Effects 0.000 description 1
- 229940051841 polyoxyethylene ether Drugs 0.000 description 1
- 229920000056 polyoxyethylene ether Polymers 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
Abstract
A non-damage neutralization acid oil and water well plug removal agent is composed of an agent A formula and an agent B formula according to the volume ratio being 1:1. The agent A formula includes 10%-20% of sulfamic acid, 2%-4% of fluoboric acid, 1%-2% of polyoxyethylene alkyl alcohol ether phosphate disodium salt, 2%-3% of brominated octadecyl pyridine and the balance clean water, wherein the sum of the mass percent of the components mentioned above is 100%. The agent B formula includes 10%-20% of sodium nitrite, 2%-4% of sorbide tristearate polyoxylethylene ether and the balance clean water, wherein the sum of the mass percent of the components mentioned above is 100%. The invention further discloses a use process of the plug removal agent. The non-damage neutralization acid oil and water well plug removal agent is a mud-acid-free plug removal agent, organic matter plugging and inorganic matter plugging which exit in an oil well or a water injection well at the same time can be removed through one time of operation, the non-damage neutralization acid oil and water well plug removal agent causes no pollution to the environment and does not damage stratum frameworks, and the defects that mud acid pollutes and seriously damages stratums and the environment are avoided.
Description
Technical field
The present invention relates to oil, well block releasing technique field, are related in a kind of fanout free region and acid oil, well de-plugging agent, this
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 on stream, in order to reach the purpose of stable yields volume increase, need to drill two kinds of well type：One kind is oil-producing well,
One kind is water injection well；Oil-producing well is that, for producing crude oil from stratum, long-term recovery process can cause stratum energy in debt, produce
Oil mass decline 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, by treated clear water stratum is injected, and increases the pressure and energy supply of oil-producing formation；Oil-producing well and water injection well meeting Jing are often produced
Raw contamination and plugging, from Producing reason analysis, 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 big class are summarized as：One kind is the organic matters such as wax, colloid, asphalitine
Class is blocked, and another kind is the inorganic species blocking such as iron oxide, rock debris, the argillaceous sandstone of solid phase particles state；Oil-water well is produced
Blocking is given birth to, it is necessary to carry out de-plugging operation, just can guarantee that normal production, at present routine de-plugging agent has been with hydrochloric acid+hydrofluoric acid abbreviation
Mud acid is host, then adds various auxiliary agents, is configured to self-generating mud-acid, micella acid, buffer regulated HF acid, MH acid, Strong oxdiative acid, foam
Several prescriptions of acid, emulsified acid, phosphoric acid etc. ten, mud acid prescription plays indispensable effect, de-plugging effect in acidifying breaking block treatment
Fruit is also more significant.
As time goes on, the strong acid effect in mud acid, the environmental pollution for causing and the grievous hurt to formation skeleton, with
And the negative interaction that increasing yield and injection effect is decreased obviously is used for multiple times, cause relevant technical staff, the extensive dispute of expert leader
And great attention, the new formula of a kind of good plugging removal effect, fanout free region, environment-friendly type is created, it is the urgent pursuit and extensively of people
Common recognition.
The content of the invention
It is an object of the invention to provide a kind of oily with acid in fanout free region, well de-plugging agent, solves conventional acidulation de-plugging agent
Environmental pollution caused by with hydrochloric acid as host, the grievous hurt to formation skeleton, and that increasing yield and injection effect is used for multiple times is obvious
The problem of decline.
It is a further object of the present invention to provide oily with acid in above-mentioned fanout free region, the use technique of well de-plugging agent.
To achieve these goals, technical scheme of the present invention is：
With acid oil, well de-plugging agent in a kind of fanout free region, by A agent prescriptions and B agent prescriptions 1 is pressed:1 volume ratio is constituted；
The mass percent of wherein A agent prescriptions is consisted of：Sulfamic acid 10-20%, fluoboric acid 2-4%, polyoxyethylene alkane
Base alcohol ether organic phosphate disodium salt 1-2%, bromination octadecylpyridinium 2-3%, balance of clear water, above prescription mass percent it
With for 100%；
The mass percent of wherein B agent prescriptions is consisted of：Natrium nitrosum 10-20%, sorbitan tristearate gather
Oxygen vinethene 2-4%, balance of clear water, above prescription mass percent sum is 100%.
Of the invention the characteristics of, also resides in,
Sulfamic acid is 1 with the mass ratio of natrium nitrosum:1.
Another technical scheme of the present invention is, with acid oil, the use technique of well de-plugging agent in a kind of fanout free region,
Specifically implement according to the following steps：
Step 1, weighs be respectively put under the medicament in A agent prescriptions and B agent prescriptions, normal temperature in Agitation Tank in proportion, injection
Clear water, stirs, that is, obtain 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, closing well reacts 4 hours, that is, complete de-plugging operation.
Of the invention the characteristics of, also resides in,
Insulating liquid and displacement fluid are clear water in step 2.
The invention has the beneficial effects as follows, 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, the term of validity is long, can be acidified deeper
The characteristics of remote stratum；Compared with the conventional de-plugging agent with mud acid as host, both with expanded hole porosity, increase permeability, releasing
Blocking, the effect of augmented injection volume increase, are avoided that pollution and grievous hurt of the mud acid to stratum and environment, while it is residual to it also avoid residual acid again
Slag returns row not thoroughly, secondary to block oily discharge orifice road and cause the short defect of the invalid or term of validity.
Specific embodiment
The present invention is further illustrated below by specific embodiment；
In a kind of fanout free region and acid deblocking agent, by A agent prescriptions and B agent prescriptions 1 is pressed:1 volume ratio is constituted.
The mass percent of wherein A agent prescriptions is consisted of：Sulfamic acid 10-20%, fluoboric acid 2-4%, polyoxyethylene alkane
Base alcohol ether organic phosphate disodium salt 1-2%, bromination octadecylpyridinium 2-3%, balance of clear water, above prescription mass percent it
With for 100%.
The mass percent of wherein B agent prescriptions is consisted of：Natrium nitrosum 10-20%, sorbitan tristearate gather
Oxygen vinethene 2-4%, balance of clear water, above prescription mass percent sum is 100%.
Sulfamic acid and the mass ratio of B agent prescription Sodium Nitrites are 1 in A agent prescriptions:1.
It is with the use technique of sour plug removal in oil and water well agent in above-mentioned fanout free region：
The medicament of above-mentioned each formula is transported to into well site, 2m is put in proportion at normal temperatures3In Agitation Tank, it is proportionally added into clear
Water agitator is miscible be uniformly configured to treatment fluid both can, a small amount of particle can be contained in treatment fluid, side can simultaneously use cement with liquid
Overall height is pressed into pit shaft, after closing well reacts 4 hours, carries out well-flushing, and thoroughly the row's of returning raffinate residue proceeds to production to well head or directly.
Treatment fluid injection order be：A agent treatment fluid → insulating liquid (clear water) → B agent treatment fluid → displacement fluid (clear water), place
Reason liquid total injection rate is according to treatment radius and processes depending on well section thickness, with reference to computing formula V=π R2H Φ are calculated, and V is in formula
Treatment fluid consumption, it is plug removal radius that π is 3.14, R, 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 clamp-oned into stratum from oil pipe or oil jacket annular space using original production tubing string, it is adaptable to
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, enter special acidifying tubing string down again, it is adaptable to multilayer and be shaked out tight
Weight, need to be layered the oil-water well of de-plugging.
The present invention know-why be：
The wherein know-why of A agent prescriptions：A agent prescriptions are by host sulfamic acid, auxiliary agent fluoboric acid, polyxyethylated alcohol
Ether phosphate disodium salt, bromination octadecylpyridinium composition；Host sulfamic acid (NH2SO3H), it is a kind of pulverulent solids acid,
Water slow mechanism dissolved is met, for releasing inorganic species blocking, 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 hydrolyze
Reaction generates hydrofluoric acid and fluorine oxygen boric acid, its course of reaction：HBF4+H2O→HBF3(OH)+HF, with stronger dissolving clay
Grain ability, fluoboric acid is made by aluminum ions dissolving in clay mineral, reducing the cation exchange capacity (CEC) of clay mineral
Clay is passivated, and reduces the expansion of clay mineral, prevents from damaging stratum；The combination of sulfamic acid and fluoboric acid, with mud acid
Formula is compared, and this formula had both served the acidizing effect of mud acid, and with circulation expansion duct, the term of validity is long, and corrosivity is little, energy
The advantages of more far-reaching stratum of acidifying, construction safety, storage and transport simplification facilitate.
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 is emulsified in water, reduces surface tension, reduces oil migration resistance, improves permeability, and barbotage is to permeability
It is selective, acid solution is promoted even into high less permeable layer, it is to avoid acid solution preferentially enters high permeability zone so that less permeable layer is not
Can be effectively improved, so as to increase the defect of contradiction in interlayer and layer.
Auxiliary agent bromination octadecylpyridinium is a kind of corrosion inhibiter, retardant, bactericide, anti-clayswelling agent, and inhibition is slowly made
With acidificatoin time can be extended, increase acidifying depth, while the saprophytic bacteria in stratum can be killed, release the accumulated plugging of saprophytic bacteria,
Also another effect suppresses clay swell, prevents from causing duct to block.
The wherein know-why of B agent prescriptions：B agent prescriptions are by natrium nitrosum, sorbitan tristearate polyoxyethylene
Ether is prepared, and natrium nitrosum has strong oxidizing property, and the aqueous solution is in alkalescence, as neutralization initiator, with amino sulphur behind injection stratum
Acid is reacted, and generates dibastic sodium phosphate, nitrogen and water, course of reaction：NH2SO3H+NaNO2→NaHSO4+N2+H2O, sulfamic acid
It is 1 with natrium nitrosum commodity usage ratio:1, sulfamic acid pH value brings up to 5-6 by 2 after reaction, is close to neutrality, course of reaction
80-90 DEG C of high temperature of middle generation and a large amount of nitrogen, form a high temperature and suppress ring on stratum, and high temperature ring can be by wax and asphalitine shape
Into fouling dissolving, release the blocking of organic species；Suppress ring to bleed off pressure or during cementing truck well-flushing in well head, pressure release, by stratum
The anti-pit shaft, and gaslift of being pushed into of residue, raffinate prevents secondary pollution stratum to well head, and residue raffinate returns row thoroughly after measure, can prolong
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 by A agent treatment fluid and B agent treatment fluid 1 is pressed:1 body
Product is than composition, A agent treatment fluid consumption 11m3, B agent treatment fluid consumption 11m3.The total consumption 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 total 17%, balance of clear water.
Wherein B agent prescriptions mass concentration is：Natrium nitrosum 10%, sorbitan tristearate APEO 2%,
Mass concentration 12%, balance of clear water.
Implementation steps：Cementing truck high-pressure outlet is connected with valve of well, treatment fluid order, A agent are clamp-oned into well
11m3→ insulating liquid 5m3→ B agent 11m3→ displacement fluid 15m3→ closing well proceeds to start production after reacting 4 hours.
Field conduct effect：Compare with before measure, daily fluid production rate increases 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 by A agent treatment fluid and B agent treatment fluid 1 is pressed:1 body
Product is than composition, A agent treatment fluid consumption 16m3, B agent treatment fluid consumption 16m3, the total consumption 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 total 19%, balance of clear water.
Wherein B agent prescriptions mass concentration is：Natrium nitrosum 13%, sorbitan tristearate APEO 3%,
Mass concentration 16%, balance of clear water.
Implementation steps：Cementing truck high-pressure outlet is connected with valve of well, treatment fluid order, A agent are clamp-oned into well
16m3→ insulating liquid 8m3→ B agent 16m3→ displacement fluid 16m3→ closing well proceeds to start production after reacting 4 hours.
Field conduct effect：Compare with before measure, daily fluid production rate increases 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 by A agent treatment fluid and B agent treatment fluid 1 is pressed:1 body
Product is than composition, A agent treatment fluid consumption 15m3, B agent treatment fluid consumption 15m3, the total consumption 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 total 26%, balance of clear water.
Wherein B agent prescriptions mass concentration is：Natrium nitrosum 18%, sorbitan tristearate APEO 4%,
Mass concentration 22%, balance of clear water.
Implementation steps：Propose flow string, under enter to be acidified tubing string, cementing truck high-pressure outlet and wellhead of water injection well valve are connected
Connect, treatment fluid order, A agent 15m are clamp-oned into well3→ insulating liquid 7m3→ B agent 15m3→ displacement fluid 18m3→ closing well reacts 4 hours
Afterwards → anti-flushing well row's residue raffinate → propositions acidifying tubing string → under enter flow string, completion is bet.
Field conduct effect：Compare with before measure, pressure drop 4.5MPa, daily water-injection rate is by 0m3Bring up to 20m3, reach
Day matches 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 by A agent treatment fluid and B agent treatment fluid 1 is pressed:1 body
Product is than composition, A agent treatment fluid consumption 20m3, B agent treatment fluid consumption 20m3, the total consumption 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 total 28%, balance of clear water.
Wherein B agent prescriptions mass concentration is：Natrium nitrosum 20%, sorbitan tristearate APEO 4%,
Mass concentration 24%, balance of clear water.
Implementation steps：Propose flow string, under enter to be acidified tubing string, cementing truck high-pressure outlet and wellhead of water injection well valve are connected
Connect, treatment fluid order, A agent 20m are clamp-oned into well3→ insulating liquid 10m3→ B agent 20m3→ displacement fluid 25m3The reaction 4 of → closing well is little
When after → anti-flushing well row's residue raffinate → propositions acidifying tubing string → under enter flow string, completion is bet.
Field conduct effect：Compare with before measure, pressure drop 3.8MPa, daily water-injection rate is by 2m3Bring up to 30m3, reach
Day matches somebody with somebody fluence 30m3Index, the term of validity 23 months.
Claims (4)
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 constituting；
The mass percent of wherein A agent prescriptions is consisted of：Sulfamic acid 10-20%, fluoboric acid 2-4%, polyxyethylated alcohol
Ether phosphate disodium salt 1-2%, bromination octadecylpyridinium 2-3%, balance of clear water, above prescription mass percent sum is
100%；
The mass percent of wherein B agent prescriptions is consisted of：Natrium nitrosum 10-20%, sorbitan tristearate polyoxy second
Alkene ether 2-4%, balance of clear water, above prescription mass percent sum is 100%.
2. in a kind of fanout free region according to claim 1 and acid oil, well de-plugging agent, it is characterised in that the amino sulphur
Acid is 1 with the mass ratio of natrium nitrosum:1.
3. in a kind of fanout free region according to claim 1 and 2 and acid oil, the use technique of well de-plugging agent, its feature exists
In specifically implementing according to the following steps：
Step 1, weighs be respectively put under the medicament in A agent prescriptions and B agent prescriptions, normal temperature in Agitation Tank in proportion, injected clear water,
Stir, that is, obtain 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 needs oil, the well of de-plugging
In, closing well reacts 4 hours, that is, complete de-plugging operation.
4. in a kind of fanout free region according to claim 3 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107384352A (en) * | 2017-06-28 | 2017-11-24 | 常州市雄图纺织有限公司 | A kind of de-plugging agent and its application method |
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| CN102676129A (en) * | 2012-04-20 | 2012-09-19 | 中国海洋石油总公司 | Water-based lubricant for drilling fluid as well as preparation and application of water-base lubricant |
| CN102775980A (en) * | 2012-07-17 | 2012-11-14 | 大庆井升伟业油田技术服务有限公司 | Acidizing block remover suitable for complex lithologic reservoir |
| CN103396776A (en) * | 2013-07-12 | 2013-11-20 | 西安石油大学 | Self-generating foam blocking removal agent for oil-water well and blocking removal process |
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2016
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102676129A (en) * | 2012-04-20 | 2012-09-19 | 中国海洋石油总公司 | Water-based lubricant for drilling fluid as well as preparation and application of water-base lubricant |
| CN102775980A (en) * | 2012-07-17 | 2012-11-14 | 大庆井升伟业油田技术服务有限公司 | Acidizing block remover suitable for complex lithologic reservoir |
| CN103396776A (en) * | 2013-07-12 | 2013-11-20 | 西安石油大学 | Self-generating foam blocking removal agent for oil-water well and blocking removal process |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107384352A (en) * | 2017-06-28 | 2017-11-24 | 常州市雄图纺织有限公司 | A kind of de-plugging agent and its application method |
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