CN107892911A - Multi-functional compound self-diverting acid system - Google Patents

Multi-functional compound self-diverting acid system Download PDF

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CN107892911A
CN107892911A CN201711107671.8A CN201711107671A CN107892911A CN 107892911 A CN107892911 A CN 107892911A CN 201711107671 A CN201711107671 A CN 201711107671A CN 107892911 A CN107892911 A CN 107892911A
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agent
diverting
acid
functional compound
compound self
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邹鹏
张世林
张苏杰
王颖
李伦
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CNPC Bohai Drilling Engineering Co Ltd
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CNPC Bohai Drilling Engineering Co Ltd
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    • 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
    • C09K8/62—Compositions for forming crevices or fractures
    • C09K8/72—Eroding chemicals, e.g. acids
    • C09K8/74—Eroding chemicals, e.g. acids combined with additives added for specific purposes
    • 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
    • C09K8/602—Compositions for stimulating production by acting on the underground formation containing surfactants
    • C09K8/604—Polymeric 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
    • C09K8/62—Compositions for forming crevices or fractures
    • C09K8/72—Eroding chemicals, e.g. acids
    • C09K8/725—Compositions containing polymers
    • 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
    • C09K8/62—Compositions for forming crevices or fractures
    • C09K8/72—Eroding chemicals, e.g. acids
    • C09K8/74—Eroding chemicals, e.g. acids combined with additives added for specific purposes
    • C09K8/78—Eroding chemicals, e.g. acids combined with additives added for specific purposes for preventing sealing
    • 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
    • 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
    • C09K2208/26—Gel breakers other than bacteria or enzymes

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  • Life Sciences & Earth Sciences (AREA)
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  • General Chemical & Material Sciences (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)

Abstract

The invention discloses a kind of multi-functional compound self-diverting acid system, component is as follows by mass percentage：Hydrochloric acid 5%~30%, low damage agent 3%~6%, diverting agent 5%~20%, cleanup additive 0.001%~2%, expansion-resisting agent 0.05%~2%, ferrous stability 0.05% 2%, demulsifier 0.05% 2%, corrosion inhibiter 0.05% 5%, antiacid slag agent 0.001% 2%, surplus is water；Wherein the amount of hydrochloric acid is in terms of pure hydrogen chloride.The multi-functional compound self-diverting acid system is also had concurrently to multifunctional performance features such as carbonate rock corrosion rate is high, liquid resistance-reducing performance is good, preventive effect of expansion is good, corrosion inhibition is excellent, antiacid slag is good, demulsification efficiency is high, the low easily row of returning of surface tension, iron ion stabilizing power are strong, compatibility is good in addition to low damage characteristic.

Description

Multi-functional compound self-diverting acid system
Technical field
The invention belongs to oilfield prospecting developing well stimulation field, and in particular to a kind of multi-functional compound self-diverting acid body System.
Background technology
For Heterogeneous reservoir in acidifying transformation process is carried out, acid solution is preferentially acidified that flow resistance is smaller, permeability is higher Reservoir, and the reservoir that flow resistance is larger, permeability is relatively low because acid solution enter do not cause freely its be acidified correctional effect it is bad.Cause This, conventional acidulation technology acutely, a large amount of consumption acid is only capable of the pollution and the permeability problems that solve nearly pit shaft area because of acid-rock reaction, Acid solution can not achieve the goal the deep hyposmosis area area of floor, it is difficult to uniform acid distribution.
For the effectively uniform acid distribution in Heterogeneous reservoir, injection acid solution is reached Zone Full, realize benefit most Bigization, low damage Acidizing Technology become when previous study hotspot, and its principle is：Before self-diverting acid liquid system unreacted, Acid fluid system does not have plastic, and viscosity keeps relatively low.And caused multivalent ion and pH rise to obtain after acid solution is reacted with rock The viscoelastic colloidal of thickening, due to the increase of viscosity, increase its flow resistance, reduce absorption energy of the high permeability zone to acid solution Power, acid solution and then the region for turning to tight stratum, make injection liquid reach Zone Full, so that maximizing the benefits.
CN102952536A discloses a kind of multifunctional self diverting acid, and the multifunctional self diverting acid is by two kinds of carboxylic acids chelas Mixture is formulated by a certain percentage.Described carboxylic acid quasi-chelate compound is selected from EDTA, HEDTA, DTPA or GLA sodium salt.Should be certainly Turn to acid and can not only be reacted with limestone and play a part of main body acid fluid system, make residual when main body acid solution is reacted with limestone formation When acid solution pH value raises, crystalline deposit it will be come out from solution with the chelant mix that specific proportions add, precipitation The rock gap of chelating agent solid particle can blocking high permeability interval or the hole of acid etching, so as to which acid solution be turned to. Iron ion can also be stablized simultaneously, prevent multivalent metal cation hydroxide or salt from occurring to precipitate the wound caused to stratum Evil.Acid fluid system disclosed in the patent has low damage and multifunctionality concurrently, but does not state the experimental data of low damage effect, such as turns To pressure or pressure-bearing data etc., low damage principle is only described.And " multi-functional " only embodies " low damage " and " iron ion is steady Fixed anti-precipitation " two major functions, other functions such as the acid fluid systems to down-hole string or equipment corrosion, with crude oil, impurity or Whether iron rust etc. forms acid sludge, whether emulsified crude oil etc. is not directed to residual acid.
The content of the invention
In order to solve the above-mentioned technical problem, the present invention provides a kind of multi-functional compound self-diverting acid system, and it is except rotation To beyond characteristic, also have concurrently to carbonate rock corrosion rate is high, liquid resistance-reducing performance is good, preventive effect of expansion is good, corrosion inhibition is excellent, anti- The multifunctional performance features such as acid sludge is good, demulsification efficiency is high, the low easily row of returning of surface tension, iron ion stabilizing power is strong, compatibility is good.
Therefore, technical scheme is as follows：
A kind of multi-functional compound self-diverting acid system, component is as follows by mass percentage：
Hydrochloric acid 5%~30%, low damage agent 3%~6%, diverting agent 5%~20%, cleanup additive 0.001%~2%, prevent It is swollen dose 0.05%~2%, ferrous stability 0.05%-2%, demulsifier 0.05%-2%, corrosion inhibiter 0.05%-5%, antiacid Slag agent 0.001%-2%, surplus are water；Wherein the amount of hydrochloric acid is in terms of pure hydrogen chloride；
Described low damage agent is oleamide CAB, erucyl amide CAB, cocamidopropyl propyl amide hydroxyl In base sulfobetaines, lauroylamidopropyl betaine, octodecyl betaine and dodecyldimethylammonium hydroxide inner salt Any one or any several mixtures with any ratio；
Described diverting agent by 3mm~5mm spherical particles I, the mesh powder II of 20 mesh~40, the mesh powder III of 100 mesh~300, Length is the material composition of IV 4 kinds of forms of 3mm~10mm chopped fibers.It is preferred that described diverting agent be PLA, PGA, Any one in poly (glycolide-lactide), polycaprolactone or any several mixtures with any ratio；
Diverting agent composition is spherical particle I 5%-25%, powder II 5%~25%, fiber IV 0.02%~ 0.3%, surplus is powder III；
Described cleanup additive be betaine type amphoteric surfactant, quaternary ammonium salt cationic type surfactant, carboxylic acid type the moon from In subtype surfactant and perfluoro capryl polyethenoxy ether class nonionic surfactant any one or it is any several arbitrarily to compare Mixture；
Described expansion-resisting agent is dimethyl diallyl ammonium chloride, PDDA, potassium chloride and chlorine Change any one in ammonium or any several mixtures with any ratio；
Described ferrous stability is citric acid, nitrilotriacetic acid, sodium ascorbate, nitrilotriacetic acid trisodium and diethyl Any one in alkene Che1300 or any several mixtures with any ratio；
Described demulsifier is any one in butyl glycol ether, butyl and triethylene glycol butyl ether or any Several mixtures with any ratio；
Described corrosion inhibiter is aldehyde ketone amine polycondensation species corrosion inhibiter, quaternized pyridinium salt corrosion inhibiter, imidazoline corrosion inhibitor In any one or any several mixtures with any ratio；It is preferred that described corrosion inhibiter is used cooperatively with synergist, it is described Synergist be any one or any several mixing with any ratio in alkynol, antimony oxide, KI and KBr Thing；The quality of the synergist is the 0.02%-0.15% of the multi-functional compound self-diverting acid system.
Described antiacid slag agent is the mixture of DBSA or neopelex or both.
It is preferred that a kind of multi-functional compound self-diverting acid system, component is as follows by mass percentage：Hydrochloric acid 10%~20%, Low damage agent 4%~6%, diverting agent 5%~10%, cleanup additive 0.003%~0.1%, expansion-resisting agent 0.1%~0.5%, iron from Sub- stabilizer 0.1%~0.6%, demulsifier 0.1%~1%, corrosion inhibiter 0.1%~1%, antiacid slag agent 0.001%~ 0.5%, surplus is water；Wherein the amount of hydrochloric acid is in terms of pure hydrogen chloride.
It is preferred that a kind of multi-functional compound self-diverting acid system, component is as follows by mass percentage：Hydrochloric acid 15%~20%, Low damage agent 4%~5%, diverting agent 6%~10%, cleanup additive 0.005%~0.01%, expansion-resisting agent 0.2%~0.3%, iron Ion stabilizer 0.2%~0.3%, demulsifier 0.3%~0.5%, corrosion inhibiter 0.2%~0.3%, antiacid slag agent 0.005% ~0.015%, surplus is water, and wherein the amount of hydrochloric acid is in terms of pure hydrogen chloride.
The multi-functional compound self-diverting acid system has the following advantages that：
1) there is low damage feature, the system is with after carbonate reservoir haptoreaction, generating calcium ion, calcium ion induction Low damage agent viscosity sharply increases, and shows as rotation tropism, acid solution is changed into from permeability channel to hypotonicity passage Acidifying, reach the purpose of deep acidizing and uniform acid distribution；The addition of other diverting agent can strengthen the viscosity and envelope of low damage agent Stifled intensity, further closure is realized to permeability channel and is turned to, diverting agent, can be in acid solution after the completion of acidizing treatment Deng voluntarily being degraded completely in aqueous environments, zero residue and reservoir zero is injured.
2) the multi-functional compound self-diverting acid system also has multifunctionality, except the temporary stall of carbonate reservoir of routine To outside deep acidizing function, also have from broken glue, the row of helping, clay suppression, precipitation of iron ions suppression, demulsification, inhibition, antiacid slag Deng seven big additional functions.
3) the multi-functional compound self-diverting acid system possesses the beneficial effect of excellent performance, in optimal compound self-diverting acidizing fluids Under formula, the system is up to 95.9%-97.5%, system surface tension to a certain oil well chip sample corrosion rate in Middle East As little as 21.2mN/m, anti-dilative are up to 98.9%, and iron ion complexing power is up to 1150mg/mL, demulsification efficiency during 30min at 90 DEG C Up to 98%, to N80 steel discs static etch rate as little as 35.5g/ (m at 160 DEG C2H), to a certain oil well in Middle East oil The antiacid slag rate of sample is up to 96.8%, and resistance-reducing yield is up to 82.3%, and compatibility is good, and above-mentioned performance indications embody acid fluid system key Performance is extremely excellent；
4) the multi-functional compound self-diverting acid system is 3.5MPa in pressure difference, and wastage scope during pressure-bearing 30min is 6.3mL~25.4mL, and clear water 30min wastages in above-mentioned casting bed are 36000mL or so, leakoff rate significantly reduces, and says Bright compound self-diverting acid system closure steering behaviour is excellent, and is suitable for different types of leakage strata condition；
5) diverting agent in the multi-functional compound self-diverting acid system is under the conditions of 80 DEG C~160 DEG C, the degradable time In the range of 1h-7d, the residue of catabolite zero；
6) after meeting water or crude oil in the multi-functional compound self-diverting acid system, can be reduced to from broken glue, i.e. viscosity Below 10mPa.s, it is easy to acid solution to return discharge stratum after constructing.
7) all additives in the multi-functional compound self-diverting acid system, its close flash point are above 70 DEG C, are not belonging to easily Explosive material is fired, is very advantageous in and is exported to overseas market progress Acidizing Technology service.
Embodiment
The preparation method of the multi-functional compound self-diverting acid system of the present invention is as follows：Interior is using stirring or scene using circulation Method concentrated hydrochloric acid or technical hydrochloric acid are well mixed with water, the concentration of hydrochloric acid of mixed liquor is reached requirement concentration；It will require dense The corrosion inhibiter of degree is slowly added in above-mentioned mixed liquor, is stirred 5min~15min, is made to be completely dissolved；Again by other acid additives (cleanup additive, ferrous stability, expansion-resisting agent etc.) concentration together or sequentially adds on request, stirs 5min~15min, obtains Basic acid fluid system；The low damage agent for requiring concentration is slowly added in the basic acid solution of above-mentioned concentration, stirring 15min~ 30min is to well mixed；Finally addition requires that diverting agent stirring 5min~15min of concentration is well mixed.
Embodiment 1-20：Acid fluid system formula
Note：All components are by mass percentage；Hydrochloric acid is in terms of pure hydrogen chloride.Compound self-diverting acid system performance evaluation side Method
By embodiment 1-20 compound self-diverting acid and calcium carbonate reaction, with the continuous addition of calcium carbonate, compound rotation Low damage effect takes place to acid, viscosity is continuously increased, using viscosity of the six fast rotation viscometers tests 5% when residual sour.Adopt Sealing characteristics evaluation is carried out to compound self-diverting acid with high-temperature and high-pressure filter press, 20-40 mesh is uniformly laid in cylindrical kettle 100 grams of quartz sand is used as casting bed, or is put into its bottom with the discoid mould that fracture width is 1mm or 3mm or 5mm (mold material is anticorrosion Hastelloy material), carry out sealing characteristics evaluation.
Evaluation method is referring especially to following methods：The corrosion inhibition evaluation method of acid fluid system refers to SY/T 5405-1996 《Corrosion inhibiter method for testing performance and evaluation index are used in acidifying》It is measured；The anti-swollen method of evaluating performance reference of acid fluid system SY/T 5971-2016《Oil-gas field fracturing is acidified and water filling clay stabilizer method of evaluating performance》It is measured；Acid fluid system The row's of helping performance i.e. surface tension evaluation method refer to SY/T 5370-1999《Surface and interfacial tension assay method》Surveyed It is fixed；The antiacid slag method of evaluating performance of acid fluid system refers to SY/T 5753-1995《Oil well production increasing intensified injection of wells arranges application surface The indoor evaluation method of activating agent》It is measured；The demulsification performance evaluation method of acid fluid system refers to SY/T 5754-2016《Oil Well acidizing mutual solvent method of evaluating performance》It is measured；The iron ion stabilizing power evaluation method of acid fluid system refers to SY/ T6571-2003《Ferrous stability method of evaluating performance is used in acidifying》It is measured；The corrosion inhibition evaluation method of acid fluid system With reference to SY/T 5405-1996《Corrosion inhibiter method for testing performance and evaluation index are used in acidifying》It is measured.
Embodiment 1-20 the performance test results are as follows：
Multi-functional compound self-diverting acid system effect provided by the invention is as follows：
1) all additives in compound self-diverting acid system, its close flash point are above 70 DEG C, are not belonging to inflammable explosive article, It is very advantageous in and is exported to overseas market progress Acidizing Technology service.
2) compound self-diverting acid system also has multifunctionality, except the temporary stall of carbonate reservoir of routine is sour to depth Change outside function, also have big attached from broken glue, the row of helping, clay suppression, precipitation of iron ions suppression, demulsification, inhibition, antiacid slag etc. seven Add function.
3) compound self-diverting acid system possesses the beneficial effect of excellent performance, should under optimal acid formula (embodiment 3) Acid fluid system is up to 95.9%-97.5% to the well chip sample corrosion rate in Middle East oil field, and acid fluid system surface tension is as little as 21.2mN/m, anti-dilative are up to 98.9%, and iron ion complexing power is up to 1150mg/mL, and demulsification efficiency is up to during 30min at 90 DEG C 98%, to N80 steel discs static etch rate as little as 0.17g/ (m at 90 DEG C2.h), at 120 DEG C to N80 steel disc Dynamic Corrosion speed As little as 22.3g/ (m2.h), 96.8% is up to the antiacid slag rate of well oil sample in Middle East oil field, compatibility is good, above-mentioned performance indications It is extremely excellent to embody compound self-diverting acid system key performance；
4) embodiment 1-20 compound self-diverting acid system is 3.5MPa in pressure difference, wastage scope during pressure-bearing 30min For 6.3mL-25.4mL, and clear water 30min wastages in above-mentioned casting bed are 36000mL or so, and leakoff rate significantly reduces, and says Bright compound self-diverting acid system closure steering behaviour is excellent, and is suitable for different types of leakage strata condition；
5) diverting agent in compound self-diverting acid system is under the conditions of 80 DEG C~160 DEG C, and the degradable time is in 1h-7d models In enclosing, the residue of catabolite zero；
6) after meeting water or crude oil in compound self-diverting acid system, below 10mPa.s can be reduced to from broken glue, i.e. viscosity, It is easy to acid solution to return discharge stratum after constructing.

Claims (6)

1. a kind of multi-functional compound self-diverting acid system, it is characterised in that component is as follows by mass percentage：
Hydrochloric acid 5%~30%, low damage agent 3%~6%, diverting agent 5%~20%, cleanup additive 0.001%~2%, expansion-resisting agent 0.05%~2%, ferrous stability 0.05%-2%, demulsifier 0.05%-2%, corrosion inhibiter 0.05%-5%, antiacid slag agent 0.001%-2%, surplus are water；Wherein the amount of hydrochloric acid is in terms of pure hydrogen chloride；
Described low damage agent is oleamide CAB, erucyl amide CAB, cocamidopropyl propyl amide hydroxyl sulphur Appointing in base glycine betaine, lauroylamidopropyl betaine, octodecyl betaine and dodecyldimethylammonium hydroxide inner salt Anticipate a kind of or any several mixtures with any ratio；
Described diverting agent is by 3mm~5mm spherical particles I, the mesh powder II of 20 mesh~40, the mesh powder III of 100 mesh~300, length For the material composition of IV 4 kinds of forms of 3mm~10mm chopped fibers；The spherical particle I, powder II, powder III and chopped fiber IV Material be PLA, PGA, poly (glycolide-lactide), in polycaprolactone in any one or it is any several arbitrarily to compare Mixture；
Described cleanup additive is betaine type amphoteric surfactant, quaternary ammonium salt cationic type surfactant, carboxylic acid type anionic Any one in surfactant and perfluoro capryl polyethenoxy ether class nonionic surfactant or any several mixing with any ratio Compound；
Described expansion-resisting agent is dimethyl diallyl ammonium chloride, PDDA, potassium chloride and ammonium chloride In any one or any several mixtures with any ratio；
Described ferrous stability is citric acid, nitrilotriacetic acid, sodium ascorbate, nitrilotriacetic acid trisodium and divinyl three Any one in triamine pentaacetic acid sodium or any several mixtures with any ratio；
Described demulsifier is any one in butyl glycol ether, butyl and triethylene glycol butyl ether or any several With the mixture of any ratio；
Described corrosion inhibiter is in aldehyde ketone amine polycondensation species corrosion inhibiter, quaternized pyridinium salt corrosion inhibiter, imidazoline corrosion inhibitor Any one or any several mixtures with any ratio；Described antiacid slag agent is DBSA or detergent alkylate The mixture of sodium sulfonate or both.
2. multi-functional compound self-diverting acid system as claimed in claim 1, it is characterised in that component is as follows by mass percentage：Salt Acid 10%~20%, low damage agent 4%~6%, diverting agent 5%~10%, cleanup additive 0.003%~0.1%, expansion-resisting agent 0.1%~0.5%, ferrous stability 0.1%~0.6%, demulsifier 0.1%~1%, corrosion inhibiter 0.1%~1% is antiacid Slag agent 0.001%~0.5%, surplus are water；Wherein the amount of hydrochloric acid is in terms of pure hydrogen chloride.
3. multi-functional compound self-diverting acid system as claimed in claim 1, it is characterised in that component is as follows by mass percentage：Salt Acid 15%~20%, low damage agent 4%~5%, diverting agent 6%~10%, cleanup additive 0.005%~0.01%, expansion-resisting agent 0.2%~0.3%, ferrous stability 0.2%~0.3%, demulsifier 0.3%~0.5%, corrosion inhibiter 0.2%~0.3%, Antiacid slag agent 0.005%~0.015%, surplus are water, and wherein the amount of hydrochloric acid is in terms of pure hydrogen chloride.
4. the multi-functional compound self-diverting acid system as described in claim 1 or 2 or 3, it is characterised in that：The diverting agent forms Spherical particle I 5%-25%, powder II 5%~25%, fiber IV 0.02%~0.3%, surplus are powder III.
5. the multi-functional compound self-diverting acid system as described in claim 1 or 2 or 3, it is characterised in that：Described corrosion inhibiter and increasing Effect agent is used cooperatively；
Described synergist is any one in alkynol, antimony oxide, KI and KBr or any several with any The mixture of ratio.
6. multi-functional compound self-diverting acid system as claimed in claim 5, it is characterised in that：The quality of the synergist is described The 0.02%-0.15% of multi-functional compound self-diverting acid system.
CN201711107671.8A 2017-11-10 2017-11-10 Multi-functional compound self-diverting acid system Pending CN107892911A (en)

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CN109777389A (en) * 2019-03-04 2019-05-21 北京国海能源技术研究院 A kind of MH acid system and preparation method thereof suitable for reservoir blockages relieving acidification
CN110358514A (en) * 2019-07-02 2019-10-22 中国石油天然气股份有限公司 A kind of accumulation type water solubility diverting agent and preparation method thereof
CN110511735A (en) * 2019-09-12 2019-11-29 西安石油大学 High-viscosity strong-corrosion acid liquor system for tight oil reservoir
CN110628404A (en) * 2019-10-14 2019-12-31 大庆市唯品科技开发有限公司 Steering composite acid-deblocking agent system of viscoelastic surfactant
CN111410944A (en) * 2020-03-31 2020-07-14 中国石油集团渤海钻探工程有限公司 Low-friction temporary-blocking diverting acid system
CN111574981A (en) * 2020-06-19 2020-08-25 西北大学 Blocking remover for oil field and preparation method thereof
CN111748333A (en) * 2020-06-29 2020-10-09 中国石油天然气集团有限公司 Environment-friendly biodegradable clean self-rotating acid liquid system for acidizing and fracturing and preparation method thereof
CN111778006A (en) * 2020-07-28 2020-10-16 西安通源正合石油工程有限公司 Enhanced gas production material for comprehensive treatment of gas well and preparation method thereof
CN111778010A (en) * 2020-07-21 2020-10-16 滨州市广友化工有限公司 High-temperature acidification diverting agent and preparation method thereof
CN113528102A (en) * 2020-04-17 2021-10-22 中石化石油工程技术服务有限公司 Completely degradable plugging agent for drilling fluid and preparation method thereof
CN116396741A (en) * 2023-04-11 2023-07-07 四川川庆井下科技有限公司 Antibacterial degradable cleanup additive and preparation method thereof
CN116410731A (en) * 2021-12-29 2023-07-11 中国石油天然气股份有限公司 Dual-steering acid liquor and preparation method and application thereof
CN116396741B (en) * 2023-04-11 2024-04-30 四川川庆井下科技有限公司 Antibacterial degradable cleanup additive and preparation method thereof

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CN109777389A (en) * 2019-03-04 2019-05-21 北京国海能源技术研究院 A kind of MH acid system and preparation method thereof suitable for reservoir blockages relieving acidification
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CN111778010B (en) * 2020-07-21 2022-03-18 滨州市广友化工有限公司 High-temperature acidification diverting agent and preparation method thereof
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CN116410731A (en) * 2021-12-29 2023-07-11 中国石油天然气股份有限公司 Dual-steering acid liquor and preparation method and application thereof
CN116396741A (en) * 2023-04-11 2023-07-07 四川川庆井下科技有限公司 Antibacterial degradable cleanup additive and preparation method thereof
CN116396741B (en) * 2023-04-11 2024-04-30 四川川庆井下科技有限公司 Antibacterial degradable cleanup additive and preparation method thereof

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