CN104650846A - Neutral fracturing fluid composition for oil extraction in oil field and preparation method thereof - Google Patents

Neutral fracturing fluid composition for oil extraction in oil field and preparation method thereof Download PDF

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CN104650846A
CN104650846A CN201510076891.3A CN201510076891A CN104650846A CN 104650846 A CN104650846 A CN 104650846A CN 201510076891 A CN201510076891 A CN 201510076891A CN 104650846 A CN104650846 A CN 104650846A
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neutral
fracturing fluid
sodium
liquid
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刘音希
赵丽萍
刘志新
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/60—Compositions for stimulating production by acting on the underground formation
    • C09K8/62—Compositions for forming crevices or fractures
    • C09K8/66—Compositions based on water or polar solvents
    • C09K8/68—Compositions based on water or polar solvents containing organic compounds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/60—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
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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
    • C09K8/84—Compositions based on water or polar solvents
    • C09K8/86—Compositions based on water or polar solvents containing organic compounds
    • C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
    • C09K8/885—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C—CHEMISTRY; METALLURGY
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    • C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
    • C09K2208/32—Anticorrosion additives

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Abstract

The invention discloses a neutral fracturing fluid composition for oil extraction in an oil field. The neutral fracturing fluid composition is prepared from the following raw materials in parts by weight: 30-35 parts of polyepoxysuccinic acid, 30-35 parts of sodium gluconate, 15-20 parts of polysiloxane quaternary ammonium salt, 18-24 parts of tannin, 15-21 parts of sulfonated styrene maleic anhydride copolymerized sodium salt, 7-12 parts of perfluordecyl sodium sulfonate, 5-8 parts of dodecanol polyoxyethylene ether-n, 0.1-0.3 part of biglycol laurate, 3-5 parts of diethylenetriamine, 3-5 parts of nonyl benzyl amine ethylether oxazoline chloridized hyamine, 10-15 parts of isopropanol, 6-8 parts of sodium salicylate, 15-20 parts of sodium alkyl benzene sulfonate and 150-175 parts of water. The neutral fracturing fluid composition disclosed by the invention is used for fracturing deblocking of oil extraction stratum of the oil field and is high in fracturing deblocking speed, neutral and free of corrosion; waste liquid can be self-degraded and can be treated without being returned to the ground; precipitates and secondary well blocking are not caused.

Description

Neutral fracturing fluid compositions of oil extraction in oil field and preparation method thereof
Technical field
The present invention relates to a kind of oil field compression fracture and use the fracturing liquid substituting acidifying, particularly the neutral fracturing fluid compositions in a kind of oil field, the invention still further relates to the preparation method of the neutral fracturing fluid compositions in oil field.
Background technology
One of important means that fracture acidizing renovation technique is developed as low permeability oil and gas field, significant contribution has been made in the exploitation for Chinese Low permeable oil and gas reservoirs.But, along with China low/Ultra low permeability reservoir reserves proportion increases year by year, the development ratio of low/extra-low permeability sandstone reservoir, volcanic reservoirs, sour oil gas reservoir and complex structural well is increasing.That studies applicable different complicated type Low permeable oil and gas reservoirs increases substantially per-well production technology, and how to improve storey increase design validity period, evade and carry out fracture acidizing and grievous injury that formation causes and pollution with acid, substitute acidizing and fracturing fluid with neutral fracturing liquid during fracture acidizing, become the important evidence direction in oil field production technique field.
Along with the high speed development of industry, global environment pollution and ecological damage are day by day serious, and protection environment for human survival is very urgent.Thereupon, the strategic height of the problem of the various fracture acidizing liquid that China oil field now uses and the ecology involved by various additives, environment, resource and economic dispatch aspect also referred Sustainable development, the liquid waste disposal produced after using hydrochloric acid, hydrofluoric acid, organic acid etc. and additive pressure break at present to be changed into from origin and stop not produce pollution waste liquid, namely change into the prevention of original pollution from the improvement after polluting.
In order to improve pressure break de-plugging scale removal safe construction quality, to obtain better increasing yield and injection effect, not only to solve the pollution problem of immediate vicinity of wellbore, also will solve the problem of formation contaminant, namely improve of the fracturing fluid scale removal deep penetration, but in conventional fracture acidizing construction, because acid and the speed of reaction of rock are very fast, be difficult to the activity ensureing acid, close to the stratum of near wellbore by excessive acidifying, form solution cavity, time serious, also can cause formation sand production.
Summary of the invention
The object of the present invention is to provide a kind of when oil field stratum is subject to polluting, need the neutral fracturing fluid compositions that carries out using in pressure break de-plugging process.This neutral fracturing fluid compositions de-plugging speed is fast, neutrality is corrosion-free, do not produce secondary sedimentation, fracturing liquid raffinate without the need to the row's of returning floor treatment, substitutes existing acidizing and fracturing fluid.Second object of the present invention is to provide oil field neutral of the fracturing fluid preparation method.
To achieve these goals, the technical scheme that the present invention takes is as follows: the neutral fracturing fluid compositions in a kind of oil field, be made up of the raw material of following portions by weight: poly-epoxy succinic acid amine 30 ~ 35 parts, Sunmorl N 60S 30 ~ 35 parts, polysiloxane quaternary ammonium 15 ~ 20 parts, tannin 18 ~ 24 parts, sulfonate styrene maleic acid anhydride copolymerization sodium salt 15 ~ 21 parts, perfluoro decyl sodium sulfonate 7 ~ 12 parts, Dodecyl Polyoxyethylene Ether-n 5 ~ 8 parts, two 0.1 ~ 0.3 part, ethylene glycol lauric acid fat, diethylenetriamine 3 ~ 5 parts, nonyl benzyl amine ethyl ether azoles quinoline quaternary ammonium chloride 3 ~ 5 parts, Virahol 10 ~ 15 parts, sodium salicylate 6 ~ 8 parts, sodium alkyl benzene sulfonate 15 ~ 20 parts and 150 ~ 175 parts, water.
The preparation method raw material of above-mentioned parts by weight being prepared into the neutral fracturing fluid compositions in oil field comprises the steps:
1, poly-epoxy succinic acid amine 30 ~ 35 parts, Sunmorl N 60S 30 ~ 35 parts, polysiloxane quaternary ammonium 15 ~ 20 parts, tannin 18 ~ 24 parts, sulfonate styrene maleic acid anhydride copolymerization sodium salt 15 ~ 21 parts, perfluoro decyl sodium sulfonate 7 ~ 12 parts, Dodecyl Polyoxyethylene Ether-n 5 ~ 8 parts, two 0.1 ~ 0.3 part, ethylene glycol lauric acid fat and 150 ~ 175 parts, water are added in reactor, stir 30 minutes to evenly with reactor mixing and blending machine, obtain first liquid; First liquid is as neutrality of the fracturing fluid complexing cleaning scale removal main component;
2, diethylenetriamine 3 ~ 5 parts, nonyl benzyl amine ethyl ether azoles quinoline quaternary ammonium chloride 3 ~ 5 parts and Virahol 10 ~ 15 parts are added in reactor, stir 30 minutes to evenly, as second liquid with reactor mixing and blending machine; Second liquid is as the of the fracturing fluid inhibition main component of neutrality;
3, sodium salicylate 6 ~ 8 parts and sodium alkyl benzene sulfonate 15 ~ 20 parts are added in cone blender, stir 30 minutes to evenly with cone blender, then cross 20 mesh sieves, obtained powder; Powder is as the of the fracturing fluid glutinous bullet micella main component of neutrality;
4, obtained first liquid and second liquid gradation are added in reactor and carry out mix and blend, mix and blend after 30 minutes, then adds powder, continues mix and blend 40 minutes to homogeneous, makes the neutral fracturing liquid in oil field.
The neutral fracturing fluid compositions in oil field of the present invention, its outward appearance is colourless or slight yellowish liquid, and density is 1.06 ~ 1.16g/cm 3; Neutral of the fracturing fluid pH is 6 ~ 7; Corrosion rate is less than 0.1g/(m 2h); During use, the aqueous solution being mixed with mass percent concentration 2% ~ 4% according to oil extraction in oil field stratafrac contamination and plugging degree water carries out pressure break de-plugging.
The present invention is used for the neutral pressure break blockages relieving fluid of oil field stratum, substitute acidizing fluid during conventional pressure break de-plugging, the blockage problem that the pollution fouling that effectively can solve oil field stratum causes, and can the speed of response of fracturing liquid scale removal component and sandstone in control fracturing de-plugging process, scale removal component can penetrate into the deep of stratum trunnion, reactant does not produce precipitation, prevents oil field stratum secondary from being blocked by dirt, realizes the effect of thoroughness pressure break de-plugging.
The present invention uses Green Chemistry Theory and technology, selects the development of raw materials green synthesis process of toxicological harmless and environmentally friendly production process, and product of the present invention is formation fanout free region when the de-plugging of oil field stratum pressure break, to operator and oil field environment nontoxic.
The material dirt that pressure break de-plugging speed of the present invention, neutrality are corrosion-free, energy rapid solution ternary composite displacement system produces, Pitch deposits are dirty, carbonate scale, silicate scale and sulfate scale, the waste liquid of pressure break de-plugging has can self-degradation, carries out of the fracturing fluid raffinate sewage disposal without the need to the row of returning ground.The pressure break de-plugging time is no more than 24 hours, reaches the corrosion-free neutral pressure break de-plugging of safety, than traditional fracture acidizing de-plugging more environmental protection, also safer.
main Function and the application mechanism of each component of the present invention are as follows:
1, poly-epoxy succinic acid amine: be made up of the compound of five to six rings, can not cause environmental accumulation, not polluted-water after neutral pressure break de-plugging, biological degradability is good, and it is that we are by the rear complexing of metal ion agent selected of a large amount of molten dirt test.Prove through neutral pressure break de-plugging research evaluation result: poly-epoxy succinic acid amine and metal ion generate complex compound, the multiple complexing ring of usual formation, number in a complex molecules the more, the stability of complex compound is higher, the more, the complex compound that ligand and complexing of metal ion are formed is just more stable for the complexing ring formed when ligand and complexing of metal ion.Because poly-epoxy succinic acid amine has multiple complexing ring, and can simultaneously with many metal ions as Ca 2+, Mg 2+, Fe 3+, Fe 2+, Ba 2+and Sr 2+plasma produces Complex effect, generate the stable complex compound with higher solubility, stop these particles to be combined with corresponding acid group, prevent precipitation, thus effectively prevent the secondary precipitate after the molten dirt of neutral fracturing liquid to block kapillary and the trunnion of oil field stratum.Simultaneously; poly-epoxy succinic acid amine also has good corrosion inhibition; Sauerstoffatom in its molecular polarity group; there is non-share electron pair; adsorption center adsorbing metal can be become and metal forms five-membered cyclic compound; and be adsorbed on metallic surface, form the protective membrane of one deck densification along metallic surface, thus play the effect of inhibition protection oil production equipment.
2, Sunmorl N 60S: be a kind of multi-hydroxy carboxy acid's type scale remover, in solvay-type fracturing liquid, to iron, magnesium, barium and strontium plasma, there is fabulous coordination ability, and have good complexing cleaning ability to the corresponding carbonate of these ions, silicates and Sulfates, also there is good corrosion mitigating effect simultaneously, and present synergistic effect, in the neutral solvay-type fracturing liquid formula of carboxylate salt, complexing effect can be strengthened.
3, polysiloxane quaternary ammonium: belong to cationic silicon-containing surfactant, molecular structure is similar to general hydrocarbon promoting agent, hydrocarbon chain in its hydrophilic radical is replaced by siliceous alkane, phenylsilylene and siloxane chain, become the hydrophobic group of promoting agent, and hydrophilic group is the same with hydrocarbon promoting agent.Polysiloxane quaternary ammonium silicon-containing surfactant is adopted in fracturing liquid, hydrophobicity is strong, shorter siloxanes chain can make this neutral fracturing liquid have significant activity, this is because in the molecular structure of polysiloxane quaternary ammonium silicon-containing surfactant, existing element silicon, again containing organic group, thus, this tensio-active agent, except the feature such as high temperature resistant, ageing-resistant, nontoxic and corrosion-free with silicon-dioxide, has again the performance such as higher surfactivity and wetting, emulsification, froth breaking and scale removal.
4, tannin: belong to polyhydric phenols, containing a large amount of hydroxyls and carboxyl, makes it have and Ca 2+, Mg 2+, Fe 2+and Fe 3+there is very strong complex ability, particularly with Ca 2+and Mg 2+complexing can become the complex compound that solubleness is very large, the precipitation at the particulate dirt end stoping fracturing liquid to dissolve.Tannin also has corrosion inhibiting ability, and can form fine and close protective membrane at oil extraction pump and flow string metallic surface, protective membrane is the reticulated structure be made up of tannin molecule and ferric iron, containing α-Fe 2o 3structure.
5, sulfonate styrene maleic acid anhydride copolymerization sodium salt: belong to polymeric surface active agent, its relative molecular weight is even millions of up to several thousand, several ten thousand, there is good surfactivity, emulsifying power is good, dispersion force is excellent, and have and increase stickiness, flocculation, dispersion and emulsifying property preferably, belong to hypotoxic environment-friendly materials.
6, perfluoro decyl sodium sulfonate: perfluoro decyl sodium sulfonate has good solubility property, high, anti-oxidant, the resistance to strong acid of its most excellent feature thermostability, highly basic, high temperature; Intermolecular mutual attractive force is little, not only hydrophobic but also oleophobic, and surfactivity is high.
7, Dodecyl Polyoxyethylene Ether-n: belong to nonionic surface active agent, be called as " green " tensio-active agent, it is high in water base stability, not easily affect by electrolytical, also the impact of acid and alkali alkali, and good with other component intermiscibility added in the present invention, in neutral fracturing liquid, there is good solvability, and have the amphiphilic structure of hydrophilic group (hydroxyl-OH, ether chain-O-, polyoxyethylene chain etc.) and oleophilic group (hydrocarbon chain R, polyoxyethylene chain etc.).
8, two ethylene glycol laurate: as defoamer, during due to pressure break de-plugging, the kinds of surface promoting agent added can produce foam, cause entrainment, and affect neutral pressure break plugging removal effect, therefore add this product and when neutral pressure break de-plugging, can effectively eliminate the foam because tensio-active agent causes.
9, diethylenetriamine, nonyl benzyl amine ethyl ether azoles quinoline quaternary ammonium chloride: both combine composite is inhibiter, with the mineral ion in neutral fracturing liquid and anion surfactant, there is synergy, composite use corrosion mitigating effect is best, increasing amount is little, under identical corrosion mitigating effect, composite corrosion inhibitor significantly reduces the usage quantity of host, reduces cost.Two kinds of inhibiter all can suppress corrosion reaction anode and cathode to be reacted, and have good corrosion mitigating effect.Research shows, adds single inhibiter, and larger skew does not occur the corrosion potential of system, belongs to mixture control type inhibiter; After adding composite corrosion inhibitor, the corrosion potential of system shows slightly negative and moves, and anode and cathode current concentration all shows slightly reduction, belongs to mixing cathode depolarizer type inhibiter.
10, Virahol: Virahol is a kind of well innoxious solvent, has perviousness, dispersiveness, defoaming.
11, sodium salicylate, sodium alkyl benzene sulfonate: sodium salicylate and sodium alkyl benzene sulfonate mixed solution are as the component of glutinous bullet micelle fracturing fluid.When sodium salicylate: when the mass fraction of sodium alkyl benzene sulfonate is 1:2.5, the chain-like structure that the covalent linkage of polymericular weight couples together, good bending chain micella could be formed, the supramolecular structure that during this chain micellar surfactant, small molecules couples together by intermolecular interaction, it can be given neutral fracturing fluid system and have good visco-elastic property.
Along with the high speed development of industry, global environmental pollution and ecological damage are day by day serious, and protection environment for human survival is very urgent.Thereupon, the ecology involved by various additives that China oil field uses, environment, resource, economy, etc. the height of the referred development strategy of problem of aspect, the of the fracturing fluid liquid waste disposal produced by additive is changed into and to have stopped from origin or not produce pollution waste liquid, be i.e. the prevention of original pollution and the improvement after uncontamination.Develop main technical requirements of the present invention and association mechanism of the present invention is as follows:
1, the neutral of the fracturing fluid technical requirements in oil field of the present invention
The neutral fracturing liquid in oil field provided by the invention is formed by multiple complexing agent, permeate agent, wetting agent and surfactant compound, we are when studying this of the fracturing fluid formula, each selected component thing is neutral or meta-alkalescence material, and each component all can not produce corrosion to metallic substance, and its compatibleness of various ingredients used, mutual solubility, preservative property, wettability and stability are all fine, not containing H in fracturing liquid +, Cl -, S 2-, SO 4 2-in the easy ion producing corrosive medium.The raw material used is all nontoxic, tasteless, corrosion-free or meta-alkalescence material, and is easy to degrade in the earth formation, free from environmental pollution.This neutral pressure break blockages relieving fluid has good complexing, dispersion, infiltration and solvency action to the calcium of carbonate, silicate, phosphoric acid salt, vitriol, magnesium ion, and chemical cleaning speed is fast.For use in alkaline surfactant polymer flooding oil-field at oil recovery process the divalence sulfonated petro-leum precipitation that produces and polyacrylamide polymers material dirty, all can with-OH ,-the ONa ,-CONH of the component such as multiple complexing agent, dispersion agent, oxygenant in this pressure break unblocking agent 2isoreactivity group generation synergistic effect, generates micromolecular compound soluble in water through oxidation, chain rupture, coordination and dispersion, to reach the object removing polymer material dirt.
2, fracturing liquid complexing descaling and blockage relieving mechanism
Poly-epoxy succinic acid amine selected in the present invention, Sunmorl N 60S, polysiloxane quaternary ammonium, tannin, sulfonate styrene maleic acid anhydride copolymerization sodium salt, perfluoro decyl sodium sulfonate, Dodecyl Polyoxyethylene Ether-n, two ethylene glycol lauric acid fat, diethylenetriamine, nonyl benzyl amine ethyl ether azoles quinoline quaternary ammonium chloride, Virahol, sodium salicylate, the active group of sodium alkyl benzene sulfonate all containing multiple coordination ion, with carbonate scale, silicate scale and sulfate scale complexing, become water soluble in water and complex compound, thus play pressure break de-plugging effect.This complex reaction is not stoichiometrically carried out, but by chemical molecular than to carry out, usually often several grams to tens grams of of the fracturing fluid complexing de-pluggings time, just can dissolve the dirt of a few hectogram calcium and magnesium ion, its compatibleness of the present invention is good, lyotropy good while, good synergistic effect can also be played, namely use the neutral fracturing liquid in this oil field when consumption is very low, also can with a large amount of fouling complexing of metal ion, this effect is called low dose effect.
3, the neutral of the fracturing fluid safe reliability in oil field
Product of the present invention is not containing the fracturing liquid of mineral acid, organic acid, highly basic, pH is 6 ~ 7, form by multiple neutral complexing agent, oxygenant, tensio-active agent, defoamer etc. are composite, fast to oil field stratum pressure break de-plugging speed, to bituminous matter dirt, sulfosalt surfactant is dirty, polyacrylamide material is dirty, various calcium magnesium salts dirt has very strong solvency action, in pressure break de-plugging process, corrosion rate is less than 0.1g/ (m 2.h), corrosion-free chemical pressure break de-plugging is really reached, than traditional fracture acidizing mineral acid, organic acid, highly basic safety and reliability.
apply beneficial effect of the present invention as follows:
1, the neutral fracturing liquid in oil field completes fracture acidizing by single stage method
Neutral of the fracturing fluid pH is 6 ~ 7, and not containing mineral acid and organic acid, therefore not containing harmful ions such as hydrogen ion, chlorion and sulfate radicals, corrosion rate is less than 0.1g/ (m 2.h), corrosion-free safe de-plugging is reached.The neutral fracturing liquid in this oil field is used in oil well fracture acidizing process, can under normal temperature to 100 DEG C condition, pressure break de-plugging is completed by single stage method, without the need to neutralizing treatment and Passivation Treatment, the more important thing is neutral fracturing liquid to the residual night after oil field stratum fracture treatment without the need to the row's of returning floor treatment, save chemical time and cost.
2, polymer material dirt and the bituminous matter of removing ternary composite driving generation are dirty
The compound scale that this neutral fracturing liquid generates precipitations such as divalence sulfonated petro-leum precipitation dirt, polyacrylamide polymers material dirt and Ferric oxide scale that producing formation and producing well in ternary compound oil drive system oil recovery process are produced by tensio-active agent, in 24 hours, under free from corrosion cleaning working condition, complete oil field compression fracture de-plugging.The tamper of the bituminous matter dirt in this neutral fracturing liquid energy rapid solution oil extraction in oil field stratum, make the permeate agent etc. of interpolation can be with the inside of organic polymer material dirt rapidly, neutral fracturing liquid is contacted rapidly with organic polymer material dirt, make bituminous matter and polymer material dirt expand, transform, finally formed soluble in the small molecule solution of water.
3, scale removal reaction is not thoroughly fallen dirty slag and does not produce throw out
This neutral fracturing liquid to all kinds of incrustation scales of oil extraction in oil field sedimentation, rust deposite, bituminous matter dirt, material is dirty all good complexing, infiltration, oxidation, dispersion and solvency action, chemical reaction is thorough, do not produce dirty slag and the new throw out of secondary, effectively can solve traditional fracture acidizing and fall large slag and secondary blocks the problem of producing formation trunnion.
4, the waste liquid of the neutral fracturing liquid de-plugging in oil field is easily degraded, without the need to the row's of returning floor treatment
Because this neutral of the fracturing fluid all components is all made up of raw materials such as the complexing agent of easily degrading, emulsifying agent, dispersion agent and oxygenants, the dirt generation chemical reaction tied with oil extraction in oil field stratum, generate the small molecules salt of easily degraded, just can reach oilbearing stratum to the oil recovery quality of water quality and environmental requirement; Use this neutral fracturing liquid to after the de-plugging of oil extraction in oil field formation chemistry, neutral of the fracturing fluid waste liquid is without the need to the row's of returning process earthward, and after saving pressure break de-plugging, waste liquid returns row's floor treatment expense, decreases the row's of returning treatment process.
5, safe and reliable, scaling effect is good
For in oil field stratum neutral pressure break de-plugging process, owing to not containing H in this neutral fracturing liquid +and Cl -producing well equipment and fracturing unit are not produced to the precipitation in burn into dead angle or producing formation, reaction thoroughly, and the phenomenon of sedimentary secondary blocking stratum trunnion can not be produced, can under normal temperature to 100 DEG C condition, the neutral pressure break de-plugging time is 24 hours, the more important thing is and really reaches the de-plugging of corrosion-free safe chemistry pressure break, than traditional fracture acidizing de-plugging safety and reliability.This neutral fracturing liquid completely eliminates the etching problem with easily causing during fracture acidizing de-plugging, inflammable, explosive, the poisonous risk being difficult to control when also having evaded the de-plugging of solvent pressure break, for guarantee safety in production, and long period oil recovery important in inhibiting.
Embodiment
Embodiment 1, takes raw material by following component and weight: poly-epoxy succinic acid amine 31kg, Sunmorl N 60S 35kg, polysiloxane quaternary ammonium 17kg, tannin 18kg, sulfonate styrene maleic acid anhydride copolymerization sodium salt 16kg, perfluoro decyl sodium sulfonate 8kg, Dodecyl Polyoxyethylene Ether-n6kg, two ethylene glycol lauric acid fat 0.2kg, diethylenetriamine 3kg, nonyl benzyl amine ethyl ether azoles quinoline quaternary ammonium chloride 3kg, Virahol 13kg, sodium salicylate 8kg, sodium alkyl benzene sulfonate 20kg and water 150kg.The raw material of above-mentioned parts by weight is prepared into the neutral fracturing fluid compositions in oil field according to following preparation method:
1, poly-epoxy succinic acid amine 31kg, Sunmorl N 60S 35kg, polysiloxane quaternary ammonium 17kg, tannin 18kg, sulfonate styrene maleic acid anhydride copolymerization sodium salt 16kg, perfluoro decyl sodium sulfonate 8kg, Dodecyl Polyoxyethylene Ether-n6kg, two ethylene glycol lauric acid fat 0.2kg and water 150kg are added in reactor, stir 30 minutes to evenly with reactor mixing and blending machine, obtain first liquid; First liquid is as neutrality of the fracturing fluid complexing cleaning scale removal main component;
2, diethylenetriamine 3kg, nonyl benzyl amine ethyl ether azoles quinoline quaternary ammonium chloride 3kg and Virahol 13kg are added in reactor, stir 30 minutes to evenly, as second liquid with reactor mixing and blending machine; Second liquid is as the of the fracturing fluid inhibition main component of neutrality;
3, sodium salicylate 8kg, sodium alkyl benzene sulfonate 20kg are added in cone blender, stir 30 minutes to evenly with cone blender, then cross 20 mesh sieves, obtained powder; Powder is as the of the fracturing fluid glutinous bullet micella main component of neutrality;
4, obtained first liquid and second liquid gradation are added in reactor and carry out mix and blend, mix and blend after 30 minutes, then adds powder, continues mix and blend 40 minutes to homogeneous, makes the neutral fracturing liquid in oil field.
Embodiment 2, takes raw material by following component and weight: poly-epoxy succinic acid amine 32kg, Sunmorl N 60S 33kg, polysiloxane quaternary ammonium 20kg, tannin 24kg, sulfonate styrene maleic acid anhydride copolymerization sodium salt 20kg, perfluoro decyl sodium sulfonate 11kg, Dodecyl Polyoxyethylene Ether-n7kg, two ethylene glycol lauric acid fat 0.3kg, diethylenetriamine 5kg, nonyl benzyl amine ethyl ether azoles quinoline quaternary ammonium chloride 5kg, Virahol 10kg, sodium salicylate 8kg, sodium alkyl benzene sulfonate 20kg and water 175kg.The raw material of above-mentioned parts by weight is prepared into the preparation method of the neutral fracturing fluid compositions in oil field with embodiment 1.
Embodiment 3, takes raw material by following component and weight: poly-epoxy succinic acid amine 33kg, Sunmorl N 60S 30kg, polysiloxane quaternary ammonium 15kg, tannin 19kg, sulfonate styrene maleic acid anhydride copolymerization sodium salt 15kg, perfluoro decyl sodium sulfonate 9kg, Dodecyl Polyoxyethylene Ether-n5kg, two ethylene glycol lauric acid fat 0.1kg, diethylenetriamine 4kg, nonyl benzyl amine ethyl ether azoles quinoline quaternary ammonium chloride 4kg, Virahol 15kg, sodium salicylate 6kg, sodium alkyl benzene sulfonate 15kg and water 160kg.The raw material of above-mentioned parts by weight is prepared into the preparation method of the neutral fracturing fluid compositions in oil field with embodiment 1.
Embodiment 4, takes raw material by following component and weight: poly-epoxy succinic acid amine 30kg, Sunmorl N 60S 34kg, polysiloxane quaternary ammonium 19kg, tannin 20kg, sulfonate styrene maleic acid anhydride copolymerization sodium salt 19kg, perfluoro decyl sodium sulfonate 7kg, Dodecyl Polyoxyethylene Ether-n8kg, two ethylene glycol lauric acid fat 0.25kg, diethylenetriamine 3.5kg, nonyl benzyl amine ethyl ether azoles quinoline quaternary ammonium chloride 4.5kg, Virahol 12kg, sodium salicylate 7kg, sodium alkyl benzene sulfonate 17.5kg and water 170kg.The raw material of above-mentioned parts by weight is prepared into the preparation method of the neutral fracturing fluid compositions in oil field with embodiment 1.
Embodiment 5, takes raw material by following component and weight: poly-epoxy succinic acid amine 35kg, Sunmorl N 60S 32kg, polysiloxane quaternary ammonium 19kg, tannin 22kg, sulfonate styrene maleic acid anhydride copolymerization sodium salt 21kg, perfluoro decyl sodium sulfonate 12kg, Dodecyl Polyoxyethylene Ether-n6kg, two ethylene glycol lauric acid fat 0.2kg, diethylenetriamine 5kg, nonyl benzyl amine ethyl ether azoles quinoline quaternary ammonium chloride 5kg, Virahol 11kg, sodium salicylate 6kg, sodium alkyl benzene sulfonate 15kg and water 165kg.The raw material of above-mentioned parts by weight is prepared into the preparation method of the neutral fracturing fluid compositions in oil field with embodiment 1.

Claims (3)

1. the neutral fracturing fluid compositions in oil field, it is characterized in that being made up of the raw material of following portions by weight: poly-epoxy succinic acid amine 30 ~ 35 parts, Sunmorl N 60S 30 ~ 35 parts, polysiloxane quaternary ammonium 15 ~ 20 parts, tannin 18 ~ 24 parts, sulfonate styrene maleic acid anhydride copolymerization sodium salt 15 ~ 21 parts, perfluoro decyl sodium sulfonate 7 ~ 12 parts, Dodecyl Polyoxyethylene Ether-n5 ~ 8 part, two 0.1 ~ 0.3 part, ethylene glycol lauric acid fat, diethylenetriamine 3 ~ 5 parts, nonyl benzyl amine ethyl ether azoles quinoline quaternary ammonium chloride 3 ~ 5 parts, Virahol 10 ~ 15 parts, sodium salicylate 6 ~ 8 parts, sodium alkyl benzene sulfonate 15 ~ 20 parts and 150 ~ 175 parts, water.
2. the neutral fracturing fluid compositions in a kind of oil field as claimed in claim 1, is characterized in that: the parts by weight of sodium salicylate and sodium alkyl benzene sulfonate are 1:2.5.
3. the method for the neutral fracturing fluid compositions in the oil field of preparation described in claim 1 or 2, is characterized in that comprising the steps:
(1), poly-epoxy succinic acid amine 30 ~ 35 parts, Sunmorl N 60S 30 ~ 35 parts, polysiloxane quaternary ammonium 15 ~ 20 parts, tannin 18 ~ 24 parts, sulfonate styrene maleic acid anhydride copolymerization sodium salt 15 ~ 21 parts, perfluoro decyl sodium sulfonate 7 ~ 12 parts, Dodecyl Polyoxyethylene Ether-n5 ~ 8 part, two 0.1 ~ 0.3 part, ethylene glycol lauric acid fat and 150 ~ 175 parts, water are added in reactor, stir 30 minutes to evenly with reactor mixing and blending machine, obtain first liquid; First liquid is as neutrality of the fracturing fluid complexing cleaning scale removal main component;
(2), diethylenetriamine 3 ~ 5 parts, nonyl benzyl amine ethyl ether azoles quinoline quaternary ammonium chloride 3 ~ 5 parts and Virahol 10 ~ 15 parts are added in reactor, stir 30 minutes to evenly, as second liquid with reactor mixing and blending machine; Second liquid is as the of the fracturing fluid inhibition main component of neutrality;
(3), sodium salicylate 6 ~ 8 parts and sodium alkyl benzene sulfonate 15 ~ 20 parts are added in cone blender, stir 30 minutes to evenly with cone blender, then cross 20 mesh sieves, obtained powder; Powder is as the of the fracturing fluid glutinous bullet micella main component of neutrality;
(4), by obtained first liquid and second liquid gradation add in reactor and carry out mix and blend, mix and blend after 30 minutes, then adds powder, and continuation mix and blend makes the neutral fracturing liquid in oil field to homogeneous in 40 minutes.
CN201510076891.3A 2015-02-13 2015-02-13 Neutral fracturing fluid composition for oil extraction in oil field and preparation method thereof Pending CN104650846A (en)

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CN110628407A (en) * 2019-09-30 2019-12-31 中国石油集团渤海钻探工程有限公司 Oil washing agent for slickwater, preparation method thereof and slickwater system
CN112920789A (en) * 2021-01-27 2021-06-08 天津新翔油气技术有限公司 Online concentrated fracturing fluid for sewage and preparation method thereof
CN115960595A (en) * 2021-10-13 2023-04-14 中国石油化工股份有限公司 Blocking removal composition and blocking removal agent for calcium sulfate scale

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Publication number Priority date Publication date Assignee Title
CN110628407A (en) * 2019-09-30 2019-12-31 中国石油集团渤海钻探工程有限公司 Oil washing agent for slickwater, preparation method thereof and slickwater system
CN112920789A (en) * 2021-01-27 2021-06-08 天津新翔油气技术有限公司 Online concentrated fracturing fluid for sewage and preparation method thereof
CN112920789B (en) * 2021-01-27 2022-06-28 天津新翔油气技术有限公司 Online concentrated fracturing fluid for sewage and preparation method thereof
CN115960595A (en) * 2021-10-13 2023-04-14 中国石油化工股份有限公司 Blocking removal composition and blocking removal agent for calcium sulfate scale

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